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    • 专利摘要:
    Electrically driven mobile compressor or pump, comprising at least one compressor or pump element (2) for supplying a fluid under pressure to a network (3) of consumers (4) of such fluid under pressure; an electric drive motor (5) coupled with the compressor or pump element (2) with a variable speed control and a control (8) for the variable speed control of the electric drive motor (5) as a function of the flow demanded by the network (3) compressed gas and / or pressure, and a connection for connecting the compressor or pump (1) to an electric power supply (7), characterized in that the control (8) is provided with an algorithm (10) with which the power supply (7) decreased electrical current (I) can be limited to a set or adjustable maximum value (Imax) by controlling the speed.
    公开号:BE1024542B1
    申请号:E2017/5241
    申请日:2017-04-05
    公开日:2018-04-05
    发明作者:Bert Jozef I LATHOUWERS；Antoon STUER
    申请人:Atlas Copco Airpower Naamloze Vennootschap；
    IPC主号:
    专利说明:

    (73) Holder (s):
    ATLAS COPCO AIRPOWER public limited company
    2610, WILRIJK
    Belgium (72) Inventor (s):
    LATHOUWERS Bert Jozef I
    2610 WILRIJK
    Belgium
    STUER Antoon 2610 WILRIJK Belgium (54) Electrically driven mobile compressor or pump and method for controlling the maximum current that can be drawn by the compressor or pump from a power source (57) Electrically driven mobile compressor or pump, containing at least one compressor or pump element (2) for supplying a fluid under pressure to a network (3) of consumers (4) of such fluid under pressure; an electric drive motor (5) coupled to the compressor or pump element (2) with a variable speed control and a control (8) for the variable speed control of the electric drive motor (5) compressed in function of the flow required by the network (3) gas and / or pressure, and a connection for connecting the compressor or pump (1) to an electric power source (7), characterized in that the control (8) is provided with an algorithm (10) with which the power source (7) is drawn electric current (I) can be limited to a set or adjustable maximum value (Imax) by controlling the speed.
    BELGIAN INVENTION PATENT
    FPS Economy, K.M.O., Self-employed & Energy
    Publication number: 1024542 Filing number: BE2017 / 5241
    Intellectual Property Office
    International Classification: F04B 49/06 F04C 28/28 F04B 49/10 Date of Issue: 05/04/2018
    The Minister of Economy,
    Having regard to the Paris Convention of 20 March 1883 for the Protection of Industrial Property;
    Having regard to the Law of March 28, 1984 on inventive patents, Article 22, for patent applications filed before September 22, 2014;
    Having regard to Title 1 Invention Patents of Book XI of the Economic Law Code, Article XI.24, for patent applications filed from September 22, 2014;
    Having regard to the Royal Decree of 2 December 1986 on the filing, granting and maintenance of inventive patents, Article 28;
    Having regard to the application for an invention patent received by the Intellectual Property Office on 05/04/2017.
    Whereas for patent applications that fall within the scope of Title 1, Book XI, of the Code of Economic Law (hereinafter WER), in accordance with Article XI.19, § 4, second paragraph, of the WER, the granted patent will be limited. to the patent claims for which the novelty search report was prepared, when the patent application is the subject of a novelty search report indicating a lack of unity of invention as referred to in paragraph 1, and when the applicant does not limit his filing and does not file a divisional application in accordance with the search report.
    Decision:
    Article 1
    ATLAS COPCO AIRPOWER public limited company, Boomsesteenweg 957, 2610 WILRIJK Belgium;
    represented by
    VAN VARENBERG Patrick, Arenbergstraat 13, 2000, ANTWERP;
    a Belgian invention patent with a term of 20 years, subject to payment of the annual fees as referred to in Article XI.48, § 1 of the Code of Economic Law, for: Electrically driven mobile compressor or pump and method for regulating the maximum current that can be drawn from a power source by the compressor or pump.
    INVENTOR (S):
    LATHOUWERS Bert Jozef I, c / o Atlas Copco Airpower N.V. Boomsesteenweg 957, 2610, WILRIJK;
    STUER Antoon, c / o Atlas Copco Airpower N.V. Boomsesteenweg 957, 2610, WILRIJK;
    PRIORITY:
    08/04/2016 BE 2016/5245;
    10/10/2016 BE 2016/5759;
    BREAKDOWN:
    Split from basic application: Filing date of the basic application:
    Article 2. - This patent is granted without prior investigation into the patentability of the invention, without warranty of the Merit of the invention, nor of the accuracy of its description and at the risk of the applicant (s).
    Brussels, 05/04/2018,
    With special authorization:
    BE2017 / 5241
    Electrically driven mobile compressor or pump and method of controlling the maximum current that can be drawn from a power source by the compressor or pump.
    The present invention relates to an electrically driven mobile compressor or pump.
    In what follows, the invention is described for compressors, but analogously the invention also relates to pumps, in which a pump serves to pressurize a liquid or liquid mixture, just as a compressor serves to compress a gas or gas mixture. .
    If no (fixed) compressed air network is available and compressed air is required, a mobile compressor is typically used.
    By mobile is meant a compressor which is intended to be movable, for instance from one site to another, even if it requires transport means or hoisting means. In short, a compressor that is not intended to be used stationary in a fixed place.
    Mobile compressors are often driven by a combustion engine, so that they can work alone.
    BE2017 / 5241
    However, such mobile compressors have several drawbacks.
    Not only do they emit combustion gases and soot and they are noisy, but you also have to refill the fuel tank regularly, which not only involves extra work but also the risk of spillage and therefore soil contamination.
    These drawbacks can be overcome by using a mobile electrically driven compressor. This mobile electrically driven compressor is then connected to an electric power source such as an electricity network or an electric generator.
    Typically, such an electrical power source is only suitable up to a certain maximum allowable electrical current and with a higher electrical current draw, the safe operation of some parts of the electrical power source or its connection may no longer be guaranteed. For example, at higher currents certain current-carrying conductors can overheat and cause fire or fire damage.
    Usually, there are built-in protections in the power source that, for example, disconnect the compressor from the power source, the electricity grid and / or the electric generator when a certain set electric current is reached, for example by means of a fuse that switches off as soon as the transmitted current is greater than the set amperage for which the fuse is intended.
    BE2017 / 5241
    A problem that can be posed is that when an electrically driven compressor is connected that can draw a higher current than the maximum electric current for which the electricity grid and / or electric generator is suitable, when the electrically driven compressor is used, the load suddenly increases. may exceed the maximum electric current, which, if the protective connection is working correctly, will lead to the aforementioned fuse breaking.
    However, when the fuse blows, other applications can also be put out of operation, for example lighting that fails, which can lead to an unsafe situation. Moreover, this can be accompanied by a significant loss of time, as the fuse must be reactivated, which often can / should only be done by a technician with the appropriate electrical qualifications and which requires a flashlight or the like that is often not immediately available, which in turn can lead to accidents.
    WO 2004 / 065.793 describes a solution to this problem with an electrically driven mobile compressor, in which the compressor's power is limited by means of an adjustable mechanical inlet valve, so that the maximum electric current absorbed is limited according to the available electrical connection or fuse. .
    BE2017 / 5241
    However, this solution of WO 2004 / 065,793 has several drawbacks, namely that such mechanical control has to be fine-tuned and that it can easily become disrupted over time, for example due to contamination of the filter or wear due to vibrations on the valve mechanism, so that there is still a risk of exceeding the maximum electric current of the fuse or the like.
    Partially closing the inlet valve not only results in lower power, but also in greater flow resistance of the compressed gas being sucked in, which greatly reduces the efficiency of the compressor.
    Yet another drawback of the solution described in WO 2004 / 065,793 is that if, in addition to the mobile compressor, other electrical appliances or consumers are also connected to the same electrical power source at the same time, the compressor must be limited to a maximum current that is equal at the maximum available current from the power source minus the combined maximum current that can be drawn from the other simultaneously connected electrical consumers.
    If, in this case, the simultaneously connected electrical consumers do not use their maximum current, then the available current and thus the compressor's power is unnecessarily limited and there is thus a significantly reduced capacity of the supplied compressed gas.
    BE2017 / 5241
    Another drawback of the solution described in WO 2004265793 is that it is not clear to the user during operation of the compressor with a maximum current setting whether the maximum current has been reached or in a broader sense how much of the corresponding available power he is using. is.
    An additional problem of the compressor described in WO 2004 / 065,793 is that the compressor cannot deliver greater power to the compressed gas consumers than the corresponding maximum electric current available from the electric power source.
    The present invention aims to solve one or more of the above and other disadvantages.
    To this end, the invention relates to an electrically driven mobile compressor or pump, comprising at least one compressor element or pump element for supplying a fluid under pressure to a network of consumers of such fluid under pressure, an electric drive motor with variable speed control coupled to the compressor element or pump element and an electric or electronic control comprising a first control configured to control the speed n, or the pressure p of the compressor or pump, respectively, in function of a set desired pressure, or of a set desired flow rate or a corresponding speed, of the pressurized fluid just requested and a second controller configured for variable speed control of the electric drive motor in
    BE2017 / 5241 function of a desired speed determined by the first control, and a connection for connecting the compressor or pump to an electrical power source, the control being provided with an algorithm with which the electrical current drawn from the power source can limit to a set maximum flow by limiting the desired speed, respectively the desired pressure, to a maximum value.
    In summary, this means that:
    - when a desired pressure is set, • the pressure is held and the speed is increased
    regularly to the pressure fixed to keep as long as the decreased current lower is then the set maximum flow, and Which, • as soon as the decreased flow the set maximum
    current reached, the maximum speed is limited;
    - when a desired flow is set, • the speed corresponding to the set flow is held and the pressure is adjusted to maintain the flow or speed as long as the drawn flow is less than the set maximum flow, and • as soon as the drawn current reaches the set maximum flow, the maximum pressure is limited.
    An advantage is that such electrical or electronic control is limited by the maximum
    2017/5241
    Ί speed or flow losses efficiency losses controls.
    maximum pressure is not accompanied by and the resultant as with the known mechanical
    The electrical or electronic control, in which the speed or pressure is limited in order not to exceed a maximum current absorbed, can be a control with a fixed maximum speed or a fixed maximum pressure, depending on the characteristics of the machine. can be determined or calculated from the set maximum flow to be drawn together with the set desired pressure, or together with the set desired flow rate, whether or not taking into account a safety margin, to fully utilize the available maximum flow without exceeding it .
    Such an arrangement has the advantage that it is easy to realize.
    Alternatively, the electrical or electronic control can also make use of a closed-circuit control in which the current absorbed is measured or determined and limited in function of the set maximum current.
    Preferably, the mobile compressor is equipped for this purpose with means to measure or determine the absorbed current continuously or with intervals and the algorithm in the control is such that when the measured absorbed current is lower than the set maximum current, the regulation of
    BE2017 / 5241 the speed is left undisturbed by the aforementioned second control, respectively the pressure regulation by the aforementioned first control, and that when the measured current absorbed is equal to or greater than the set maximum current, the control the maximum speed, respectively. will keep the maximum pressure constant or will decrease until the measured current consumption again falls below the set maximum current.
    The current absorbed can be measured, for example, by the second variable speed control or by a separate current meter in the connection to the power source. The measured current absorbed is then compared by the control with the set maximum current and then the desired maximum speed of the electric drive motor or the maximum pressure of the compressor element is adjusted so as not to exceed the maximum current.
    It is also possible to set a safety margin on the maximum current, so that the regulation intervenes when the current absorbed is equal or just greater than the maximum current minus the safety margin.
    Since in the latter case the control measures and controls the absorbed current, a control according to the invention is independent of influences which increase the absorbed current, such as in the case of wear, pollution of filters, or the like, so that in the case of the invention there is no risk that due to these influences the
    BE2017 / 5241 maximum permitted current would be exceeded undesirably.
    The maximum current for the electrical control system can be set in various ways.
    In a simplest embodiment, the mobile electrically driven compressor is provided with a multi-position switch with at least two positions, each position corresponding to a maximum electric current. Such multi-position switch can be realized in the form of a rotary knob with a selection scale, push buttons or others.
    It is also possible to make the maximum current analog adjustable, for example with a rotary knob with a scale.
    Typically, in a given country, the maximum current values for electrical outlets are standardized, and after selecting the corresponding maximum current value on the electrically driven compressor, simply plug it into the electrical outlet and use it immediately. For example, the same mobile electrically driven compressor can easily be used in different countries and connected to different sockets.
    For three-phase connection, for example, 16, 32, 63 and 125 amps in Europe and 20, 30 and 50 amps in the United States are common maximum current values.
    BE2017 / 5241
    For single-phase connection, for example, 16 amps in Europe, 13 amps in the United Kingdom and 15, 20, 30 and 50 amps in the United States are common maximum current values.
    Typically, a certain voltage and frequency is also used in a particular country or region.
    For three-phase connection, 400 volts and 50 Hz are common in Europe, 480 volts and 60 Hz in the United States, 380 volts and 60 Hz in Brazil, 575 volts and 60 Hz in Canada and both 200 volts and 50 Hz and 200 volts in Japan and 60 Hz.
    For single-phase connection, 230 volts and 50 Hz are common in Europe and the United Kingdom, and 120 volts and 60 Hz in the United States.
    To simplify the setting of the maximum current value for the user, it is also possible to provide two controls, for example two multi-position switches, whereby the country, region, voltage and / or frequency can be selected with one multi-position switch and, depending on the the selected position, the selection scale of the other multi-position switch is adjusted so that the last multi-position switch can be used to set a maximum current value that is customary in the country or region concerned.
    It is also possible that the maximum current is set via a selection option in the general control of the compressor. Ofwe.1 can be selected via the selection option
    BE2017 / 5241 between two or more maximum current values and possibly the option of a freely selectable maximum current value, or a maximum current value can be entered directly. Optionally, before setting the maximum current, the country, region, voltage and / or frequency can be set first with a selection option, so that the selection is simple and limited.
    It is also possible that the maximum current values are set automatically. For example, the mobile compressor can be provided with means to measure the voltage and / or frequency of the electricity network to which the mobile compressor is connected, and to adjust the selection scale with the maximum current values on the basis thereof. It is also possible that the selection scale with the maximum current values is adjusted on the basis of GPS coordinates. The GPS coordinates can be obtained from a GPS chip in the mobile compressor itself or by communication with another device with a GPS chip, such as a smartphone.
    It is possible that the end user can set this option (s) himself, or that it is protected in some way, for example with a password, hardware key, or the like.
    For example, a lessor of such compressors who has the password and / or hardware key can set the maximum current on the mobile electrically driven compressor for the end user to whom he has the mobile electrically driven compressor.
    BE2017 / 5241 rents out and this end user cannot exceed the maximum current set by the landlord.
    For example, the lessor can set the mobile electrically driven compressor for a specific use, for example a certain capacity for driving a certain number of pneumatic tools, for example two pneumatic breakers.
    This offers the landlord the advantage that he can rent the same type of mobile electrically driven compressor with differently set maximum current values and thus can charge the set maximum usage at a different price.
    This offers the advantage that the tenant of the compressor does not have to pay too much for an overweight compressor if the landlord cannot offer him a lighter compressor with a lower power for which the tenant needs the compressor.
    For example, with a different password and / or hardware key, the compressor can be adjusted by the manufacturer and / or landlord for a specific country / region by setting the standard maximum current values applicable in that country / region as an option.
    Optionally, the electrically driven mobile compressor according to the invention may be provided with one or more electrical connections which are intended for the possible electrical supply of external electrical
    BE2017 / 5241 consumers, the current from one or more terminals being tapped at a location downstream of the means for determining or measuring the absorbed current, so that the current measured by the aforementioned means is also the current jointly generated by the compressor and the electrical consumers connected to the respective electrical connections are taken from the power source.
    This offers the advantage that, unlike in situations with known mobile compressors, the electric control system of the compressor ensures that the total maximum current is limited, so the sum of the electric current for the electric mobile compressor and the other electrical appliances connected to one or more connections on the mobile electrically driven compressor. For example, the mobile electrically driven compressor can always fully utilize the available electric current, i.e. electric power.
    Another possible useful option could be to equip the compressor with a signal or indicator that indicates when the maximum current has been reached or is nearing or indicates how much of the available power or power is being consumed or is still available. This can be done, for example, by sounding a tone, lighting a lamp and / or some other display on a display or dial.
    According to a special aspect of the invention, the electrically driven mobile compressor can be provided with
    BE2017 / 5241 two or more connections for connection to two or more different electrical power sources that can simultaneously power the compressor in parallel, so that the available electrical power from one power source can be supplemented by the available power from one or more other power sources if the available power of the first power source would prove to be inadequate for the intended application.
    In this way, for example, the available power of the electricity grid can be supplemented with power from a battery pack with one or more batteries.
    In addition, when the mobile electrically driven compressor is not used and is connected, the batteries can be charged with an electric current less than the maximum current of the connection. When the mobile electrically driven compressor is utilized, the electric mobile compressor can utilize a power corresponding to the maximum electric current of the terminal plus the electric current that the battery can supply. This allows the compressor to temporarily provide a higher capacity. In addition, it is also possible to operate the compressor alone when not switched on, using electric power supplied by the battery alone.
    The available power of the electricity grid can, for example, also be supplemented with power from one or more generators.
    BE2017 / 5241
    The available power of, for example, also supplemented from one or more electricity grids and / or on electricity grids.
    the power grid can be with power connections to the same one or more others
    The invention also relates to an electrically driven mobile compressor or pump which is provided with two or more connections for connection to two or more different electrical power sources which can simultaneously supply the compressor or pump in parallel, one of the controls being provided with a algorithm by which the electrical current drawn from each power source can be limited to a set or adjustable electrical electrical the total current taken over the connected the total drawn maximum value by dividing power sources by current and limiting electrical current to the sum of the set maximum current values of all connections to which electrical power sources are connected by regulation of the speed or of the pressure depending on whether a desired pressure or flow has been set.
    For this purpose, the electrically driven mobile compressor or pump is preferably equipped with means to be able to measure or determine the current absorbed per connection to an electric power source continuously or with intervals.
    Furthermore, the electrically driven mobile compressor or pump is then preferably equipped with additional means to set the maximum current per connection.
    BE2017 / 5241
    Furthermore, the electrically driven mobile compressor or pump is therefore preferably equipped with additional means to allow the user to adjust how the algorithm is to distribute the total electric current drawn between the terminals to which an electric power source is connected.
    For example, according to a first distribution setting, it is possible to set the priority of the connections and the algorithm then draws current from the connections to which an electric power source is connected according to this priority.
    According to a second distribution setting, it can be set, for example, that the algorithm of each connection to which an electrical power source is connected decreases current in proportion to the maximum current set for that connection.
    In a preferred embodiment of the invention, a volumetric compressor element is used in the electrically driven mobile compressor. A volumetric compressor element can be driven over a wide speed range by the electric motor, so that maximum current values can be set for the electrically driven mobile compressor over a wide range.
    In a preferred embodiment of the invention, the electrically driven mobile compressor uses a volumetric rotary compressor element, such as
    BE2017 / 5241 for example a screw compressor element, a roots blower element, a tooth compressor element, a vane compressor element or a scroll element. A rotary compressor element can be driven over an even wider speed range by the electric motor, because it can be driven at higher speeds.
    The invention is not limited to compressed air compressors, but can also be applied to electrically driven mobile compressors for other gases and gas mixtures, such as, for example, nitrogen, carbon dioxide, steam, and others.
    A compressor generates a higher pressure at the outlet than at the inlet. It is well known that a compressor, optionally provided with additional adjustments for this purpose, can also be used to generate an underpressure, also called vacuum, at the inlet. The invention can therefore also be applied to a volumetric vacuum pump.
    The invention also relates to a method for controlling the maximum electric current that can be drawn from an electrical power source by a mobile compressor or pump, the compressor or pump comprising a compressor or pump element for supplying a fluid under pressure Idum to a network of consumers and in which the compressor or pump element is coupled to a variable speed electric drive motor, characterized in that the method comprises the following steps:
    BE2017 / 5241 connecting the compressor or pump to an electrical power source;
    determining the maximum electrical current that is desired or that is available from the power source;
    - controlling the speed of the drive motor, or the pressure of the fluid under pressure, in function of a set desired pressure or a set desired flow rate;
    - limiting the regulated speed at a desired pressure, or limiting the regulated pressure at a desired flow, to a maximum value in order to limit the drawn flow to the aforementioned maximum flow.
    This method according to the invention has the same advantages as those described above for the mobile compressor or pump according to the invention.
    According to a first alternative, the method comprises the following steps:
    calculating or determining for the relevant compressor or pump in advance the maximum value of the speed at a desired pressure, or of the pressure at a desired flow rate, to which the speed or pressure must be limited in order to limit the drawn off flow to the maximum current;
    limiting the speed, or limiting the pressure, to the aforementioned calculated or determined maximum value.
    BE2017 / 5241
    According to a second alternative, the method comprises the following steps:
    - continuously or periodically measuring or determining the electric current drawn from the power source;
    - comparing the measured current drawn with the maximum current;
    ~ leaving the aforementioned regulation of the speed at a desired pressure or of the pressure at a desired flow rate unaffected when the measured flow is lower than the set maximum flow;
    limiting the electric current drawn from the power source to the maximum current by limiting the maximum value of speed in the case of a desired pressure or by limiting the maximum value of the pressure in the case of a desired flow rate.
    When the power source is equipped with a fuse with a set protection current, a desired or selected maximum current is assumed that is at most equal to the value of the protection current of the fuse, so that a maximum current can be used without the fuse disconnecting the current.
    The compressor or pump may optionally be provided with one or more electrical connections that are intended for the possible electrical supply of external electrical consumers, whereby the power of these electrical connections is taken from the power source together with the power of the drive motor. In that case, the method preferably includes a step of measuring the van
    BE2017 / 5241 the power source collectively draw current and a step for limiting the electric current drawn from the power source collectively to the maximum current by controlling the speed and / or pressure.
    This offers the advantage that the collectively drawn current of the drive motor and of the connected electrical consumers will never exceed the protection value of the fuse of the power source and thus the fuse will never switch off the power source.
    Optionally, the compressor or pump can be connected to two or more different electrical power sources that can simultaneously power the compressor or pump in parallel.
    In that case, the method according to the invention preferably comprises the following steps:
    for each power source, determining the maximum electrical current desired or available from the power source;
    - for each electrical power source, determining continuously or with intervals the current drawn from the respective power source;
    - limiting the current drawn for each power source to the maximum current for the relevant power source by distributing the total electric current drawn between the power sources and limiting the total electric current drawn to the sum of the set maximum permitted current values of all connected
    BE2017 / 5241 power sources by regulation of speed or pressure.
    The total drawn electric current can then be distributed proportionally or according to a chosen priority per connection among the connected power sources.
    With an understanding of better demonstrating the features of the invention, some preferred embodiments and applications of a mobile electrically driven compressor according to the invention are described below, by way of example without any limitation, with reference to the accompanying drawings, in which:
    figure 1 schematically represents a compressor according to the invention;
    Figures 2 and 3 each show a possible variant embodiment of a compressor according to the invention.
    Figure 1 shows a mobile compressor 1 according to the invention containing at least one compressor element 2 for compressing and supplying gas to a network 3 of consumers 4 of compressed gas; an electric drive motor 5 with variable speed n coupled to the compressor element 2, the electric drive motor 5 being provided with a connection 6 for connection to an electric power supply 7 via a control 8.
    BE2017 / 5241
    This control 8 contains:
    a first control 8a of the compressor element 2 configured to control the speed n, respectively the pressure p of the compressor or pump, in function of a set desired pressure pset or a set desired flow rate Qset, and,
    a second control 8b configured for the variable speed control of the electric drive motor 5 in function of a desired speed nset determined by the first control 8a.
    For example, a normal control of a compressor may consist in maintaining, as is known, a set pressure pset in the network 3 or a certain set flow rate Qset.
    In case a set pressure pset has to be maintained, if the demand of the network 3 for supply of compressed gas increases, for example, the pressure p in the network 3 will drop and the control 8a will respond to this by the desired speed nset of the drive motor 5 to cause the compressor element 2 to supply a higher flow rate of compressed gas until the pressure again becomes equal to the set value pset.
    In case a set flow rate Qset must be maintained, if the pressure p on the network 3 increases, the control 8b will keep the speed n constant, for example, and the control 8a will decrease the pressure at the same speed.
    BE2017 / 5241
    The compressor 1 of the example contains means 9 for measuring the electric current I drawn from the power source 7 and passing it on to the controller 8 as an appropriate signal.
    In the example of figure 1, the compressor 1 is further provided with a control system which in this case is integrated in the tuning 8, this control system being provided with an algorithm 10 with which the electric current I drawn from the power source 7 can be limited to a maximum value Imax by set speed nset pressure pset up to a maximum case of a set flow rate Qset.
    The maximum value Imax is the first actuation 11, which can be adjusted by means of a connection to limit the setpoint or setpoint, respectively in the desired pressure pset or desired.
    The operation 11 is, for example, in the form of a first multi-position switch, which allows to set a maximum value Imax of the current I to a pre-programmed selection value, for example to select from a series of preset selection values on a selection scale 12. In the example in this way, a setting of 16, 32 or 63 amps can be selected depending on what is desired or what is available at the power source 7.
    4
    BE2017 / 5241
    In the case of Figure 1, the selection scale 12 is also self-adjustable by means of a second control 13, for instance in the form of a second multi-position switch, which, for example, allows the selection scale 12 to be adapted to the current protections that are common in a particular region.
    For example, in Europe a mains voltage of 400 volts is common with standard current protection devices of 16, 32, 63 and 125 amperes, while in the United States a mains voltage of 480 volts and protection devices of 20, 30 and 50 ampere is common.
    For example, in the example of Figure 1, the multi-position switch 13 is set for use in Europe with a voltage of 400 volts and 16 amps.
    It is clear that the multi-position switch 13 can also be omitted, in which case the selector scale 12 contains, for example, all common current values of power protection in several regions, for example a selector scale 12 with selector values 16, 20, 30, 32, 50 and 63 amperes for use in Europe and the United States.
    It is also clear that there may also be other possibilities to set the maximum current, for example via a digital setting with a keyboard or the like.
    For example, the aforementioned algorithm 10 may consist of measuring the measured current I continuously or at intervals
    BE2017 / 5241 and compare it with the set maximum current Imax and do the regulation in such a way that, if the measured current absorbed I is lower than the set maximum current Imax, the normal regulation of the speed n or the pressure by the said control 8a and / or control 8b is left untouched, but wherein, when the measured current I absorbed is equal to or greater than the set maximum current Imax, the control 8 will keep the speed n or the pressure p constant or decrease it until when the measured current consumption I will again fall below the set maximum current Imax.
    For example, if a consumer 4 is additionally connected to the network 3 with a set desired pressure pset, this will increase the demand for compressed gas. This will in a known manner a response of the control Suitlokken by an increase in the speed n of the drive motor 5 of the compressor element 2. At the same operating pressure in the network 3 this will lead to an increased current draw I of the power source 7.
    As long as the measured current draw I is lower than Imax in this situation, the variable speed control will be left untouched and it will be able to adjust the speed n within certain limits with an increase or decrease in the consumption of the network 3, but when the measured current I becomes equal to Imax, the algorithm 10 will ensure that the speed cannot increase or decrease when the current I exceeds or threatens to exceed Imax.
    BE2017 / 5241
    For example, if the resistance of the network 3 changes with a set desired flow rate Qset, this will change the pressure, while the desired flow rate must remain constant. This will provoke a reaction of the control 8 in a known manner by adjusting the pressure p at constant speed of the drive motor 5 of the compressor element 2. In the event of an increase in pressure, this will lead to an increased current draw of the power source 7.
    In case a desired flow rate Qset has been set, in a certain situation in which the pressure on the network 3 will decrease while the desired flow rate has to remain constant, this will provoke a reaction of the control 8 in a known manner by an increase in the pressure p at constant speed as controlled by controller 8b. With constant flow to the network 3 this will lead to an increased current draw I of the power source 7.
    As long as in the latter case the measured drawn off current I is lower than Imax, the variable pressure control will be left undisturbed and will be able to adapt pressure p to the pressure of the network 3 within certain limits, but when the measured current I becomes equal on Imax, the algorithm 10 will prevent the pressure from rising or decreasing further when the current I is or threatens to exceed Imax.
    Figure 2 shows a variant of a compressor 1 according to the invention, wherein the selection scale 12 of the in
    7
    BE2017 / 5241 maximum current to be set by the control 8 itself is determined as a function of the voltage V of the electrical power source 7 to which the compressor 1 is connected and which can be measured in known manner with the aid of a voltmeter 14. Alternatively, it can be done in steps of the voltage also the frequency, or a combination of both, can be measured.
    Furthermore, this compressor 1 of figure 2 differs from the previous embodiment of figure 1 in that it is provided with one or more electrical connections 15 downstream of the means
    9, in this case downstream of the controller 8, are branched off and intended for supplying power to external electrical consumers 16. In this way, the means 9 measures the current which is jointly driven by the driving motor 5 of the compressor element 2, the controller 8 and the external consumers 16 are consumed.
    Thus, it is ensured that the joint current draw can never exceed the limit of the set maximum current Imax.
    In the example of Figures 1 and 2, the electrical supply 7 is taken from an outlet 17 of an electricity network, which outlet 17 is electrically protected by means of a fuse 18 or other protection of the electricity network whose protection current determines the value of the the electrically driven mobile compressor 1 to set maximum current Imax.
    BE2017 / 5241
    In figure 3, two different power sources 7 are used for the power supply of the compressor 1, a first power source 7a respectively in the form of a first connection 6a to an electricity mains and a second power source 7b in the form of a second connection 6b on a battery pack 19 The first terminal 6a includes an outlet 17a and is protected by a fuse 18a, the second terminal 6b includes an outlet 17b and is protected by a fuse 18b.
    Depending on the desired power and the situation, only the first power source 7a or the second power source 7b can be addressed and both of them can be simultaneously taken in parallel current, in which case an increased power is temporarily available if desired.
    In the embodiment of figure 3 there is also an auditory or visual signal 20 which gives an alarm when the maximum current Imax has been reached or is almost reached or which indicates how much of the available current or power is consumed or is still available.
    The present invention is by no means limited to the exemplary embodiments described in the figures, but a mobile electrically driven compressor and method according to the invention can be realized in various shapes and sizes without departing from the scope of the invention.
    BE2017 / 5241
    权利要求:
    Claims (29)
    [1]
    Conclusions.
    1.- Electrically driven mobile compressor or pump, comprising at least one compressor or pump element (2) for supplying a fluid under pressure to a network (3) of consumers (4) of such fluid under pressure; an electric drive motor (5) with variable speed control and an electric or electronic control (8) coupled to the compressor or pump element (2) and comprising a first control (8a) configured to the speed (n) and the pressure (p), respectively of the compressor or pump in function of a set desired pressure or a set desired flow rate, of the fluid requested by the mains, and a second control (8b) configured for variable speed control of the electric drive motor (5) in function of a desired speed determined by the first control (8a) and a connection (6) for connecting the compressor or pump (1) to an electrical power source (7), characterized in that the control (8) is an algorithm (10) with which the electrical current (I) drawn from the power source (7) can be limited to a set or adjustable maximum value (Imax) by limiting the desired set speed, or the desired set pressure, up to a maximum value.
    [2]
    2. Electrically driven mobile compressor or pump according to claim 1, characterized in that the electrical or electronic control regulates the speed or the pressure
    BE2017 / 5241 limited in order not to exceed a maximum current consumption, a control with a fixed value of the maximum speed or of the maximum pressure,
    or determined is in position from the the machine and outbound from the to take flow together with the
    set desired pressure, respectively based on the set maximum flow to be drawn together with the set desired flow rate.
    [3]
    Electrically driven mobile compressor or pump according to claim 1, characterized in that means (9) are provided for determining or measuring the absorbed current continuously or at intervals, the algorithm (10) being such that, if the measured current absorbed is lower than the set maximum current, the speed regulation is left unaffected by the aforementioned control (8), but where, when the measured current absorbed is equal to or greater than the set maximum current, the control (8) the speed will remain constant or will decrease until the measured current consumption again falls below the set maximum current.
    25
    [4]
    Electrically driven mobile compressor or pump according to one of the preceding conclusions, characterized in that the compressor or pump (1) is provided with a first control (11) which allows a maximum permitted value (Imax) of the current (I) configure.
    BE2017 / 5241
    [5]
    Electrically driven mobile compressor or pump according to claim 4, characterized in that the first control (11) is adjustable to a series of pre-programmed selection values.
    [6]
    Electrically driven mobile compressor or pump according to claim 5, characterized in that the pre-programmed selection values are displayed on a selection scale (12) which is itself adjustable by means of a second control (13) in function of current protections of electric power sources (7) which are common in a certain region or the like.
    [7]
    Electrically driven mobile compressor or pump according to claim 5, characterized in that the electrically driven mobile compressor or pump is provided with means (14) for determining the voltage and / or frequency of the electric power source (7) and on a selection scale. (12) display pre-programmed current protection selection values common in a particular region or the like in combination with the measured voltage and / or frequency.
    [8]
    Electrically driven mobile compressor or pump according to claim 5, characterized in that the electrically driven mobile compressor or pump is provided with means for determining the GPS coordinates of the compressor or pump (1) pre-programmed and on a selection scale.
    12) display current protection selection values common in the region where the
    BE2017 / 5241 compressor or pump (1) according to the determined GPS coordinates.
    [9]
    Electrically driven mobile compressor or pump according to any one of claims 4 to 8, characterized in that said first and / or second control (11, 13) is or are protected by a key, a password or the like.
    [10]
    Electrically driven mobile compressor or pump according to any one of claims 3 to 9, characterized in that it comprises one or more electrical connections (15) intended for the possible electrical supply of external electrical consumers (16), wherein the current from one or more electrical connections (15) is tapped at a location downstream of the mid-s (9) to determine or measure the absorbed current, so that the current (I) measured with the mid-s (9) the current is taken jointly from the power source (7) by the compressor or pump (1) and by the electrical consumers (16) connected to the relevant electrical connections (15).
    [11]
    Electrically driven mobile compressor or pump according to any one of the preceding claims, characterized in that said electrical power source (7) is taken from a socket (17) of an electricity network, which socket (17) is electrically protected by means of a fuse (18) from the electrical power source (7) or from a mains supply, the protection current of the fuse (18)
    BE2017 / 5241 determines the value of the maximum current (Imax) to be set on the electrically driven mobile compressor or pump (1).
    [12]
    Electrically driven mobile compressor or pump according to any one of the preceding claims, characterized in that it is provided with an audible or visual signal (20) which gives an alarm when the maximum current (Imax) has been reached or is almost reached or which indicates how much of the available power or power is consumed or is still available.
    [13]
    Electrically driven mobile compressor or pump according to any one of the preceding claims, characterized in that it comprises two or more connections (6a, 6b) for connection to two or more different electric power sources (7a, 7b) which the compressor or pump ( 1) can supply parallel power simultaneously.
    [14]
    Electrically driven mobile compressor or pump according to claim 13, characterized in that, per connection (6) for connection to an electric power source (7), it is provided with means to determine the current drawn continuously or at intervals and a maximum permissible value (Imax) of the current (I) per connection (6).
    [15]
    - Electrically driven mobile compressor or pump according to claim 14, characterized in that the control (8) is provided with an algorithm (10) with which the drawn electric current per connection (6) can be limited to the set maximum permitted value (Imax ) for that
    BE2017 / 5241 connection (6), by dividing the total drawn electric current between the connected electrical connections (6} and limiting the total drawn electric current to the sum of the set maximum permitted current values of all connections (6) on which electrical power sources (7) are connected by speed regulation.
    [16]
    Electrically driven mobile compressor or pump according to claim 15, characterized in that the compressor or pump (1) is provided with a control which allows to set whether the total electric current is proportional or an adjustable priority per connection (6 ) is taken.
    [17]
    Electrically driven mobile compressor or pump according to one or more of the preceding claims 13 to 16, characterized in that at least a first connection (6a) is provided for connection to an electricity network and at least a second connection (6b) is provided for connection to a battery pack (19) with one or more batteries to bend the available electric power with respect to the available power of the first connection (7a).
    [18]
    Electrically driven mobile compressor or pump according to claim 17, characterized in that the electrically driven mobile compressor or pump is provided with means for charging the battery pack (19).
    BE2017 / 5241
    [19]
    19. ~ Electrically powered. mobile compressor according to any one of the preceding claims, characterized in that the compressor or pump element is a volumetric compressor or pump element.
    or pump (2) a
    [20]
    Electrically driven mobile compressor or pump according to claim 19, characterized in that the compressor or pump element (2) is a rotary compressor or pump element.
    [21]
    21.- Method for controlling the maximum electric current (Imax) that can be taken from a mobile power source (7) by a mobile compressor or pump, the compressor or pump (1) comprising a compressor or pump element (2) for supplying a fluid under pressure to a network (3) of consumers (4) and in which the compressor or pump element (2) is coupled to an electric drive motor (5) with variable speed control, characterized in that the method comprises the following steps contains:
    - connecting the compressor or pump (1) to an electrical power source (7);
    determining the maximum electric current (Imax) desired or available from the power source (7);
    regulating the speed (n) of the drive motor (5) or the pressure (p) of the fluid under pressure, in function of a set desired pressure (pset) or set desired flow rate (Qset), of a
    BE2017 / 5241
    - limiting the regulated speed (n) at a desired pressure (pset), respectively limiting the regulated pressure (p) at a desired flow rate (Qset), to a maximum value in order to limit the drawn off flow to the aforementioned maximum current (Imax).
    [22]
    Method according to claim 21, characterized in that the method comprises the following steps:
    calculating or determining for the relevant compressor or pump the maximum value of the speed (s) at a desired pressure (pset), or the pressure (p) at a desired flow rate (Qset), for which the speed (s) , respectively the pressure (p), must be limited to limit the drawn current (I) to the maximum current (Imax);
    - limiting the speed (n) or the pressure (p) to the aforementioned calculated or determined maximum value.
    [23]
    Method according to claim 21, characterized in that the method comprises the following steps:
    - continuously or periodically measuring or determining the electric current (I) taken from the power source (7);
    - comparing the measured current drawn (I) with the maximum current (Imax);
    - leaving the aforementioned control of the speed (s) at a desired pressure (pset) or of the pressure at a desired flow rate (Qset) when the measured current (I) is lower than the set maximum current (Imax) ;
    BE2017 / 5241 limiting the electrical current (I) drawn from the power source (7) to the maximum current (Imax) by limiting the maximum value of speed (s) in the case of a desired pressure (pset) or by limiting of the maximum value of the pressure (p) in case of a desired flow (Qset).
    [24]
    Method according to one of the claims 21 to 23, characterized in that the power source (7) is provided with a fuse (18) with a set protection current and that the desired or selected maximum current (Imax) is at most equal to the value of protection current of the fuse (18).
    [25]
    Method according to one of claims 21 to 24, characterized in that the compressor or pump is provided with one or more electrical connections (15) which are intended for the possible electrical supply of external electrical consumers (16), whereby the current of these electrical connections (15) together with the current from the drive motor (5) is taken from the power source (7) and the method comprising the step of measuring the current (I) collectively drawn from the power source (7) and the step of limiting the electric current (I) collectively taken from the power source (7) to the maximum current (Imax) by controlling the speed.
    [26]
    Method according to any one of claims 21 to 25, characterized in that it comprises the step of generating an auditory or visual signal (20) which gives an alarm when the maximum current (Imax) is reached or almost
    BE2017 / 5241 has been reached or indicates how much of the available power or power is consumed or is still available.
    [27]
    Method according to any one of claims 21 to 26, characterized in that it consists in connecting the compressor or pump (1) to two or more different electrical power sources (7a, 7b) that supply the compressor or can simultaneously power the pump (1) in parallel and include the following steps:
    - for each power source, determining the maximum electric current (Imax) desired or available from the power source (7a, 7b);
    - for each electrical power source (7a, 7b), continuously or intermittently determining the respective
    Power source (7a, 7b) drawn current (I);
    limiting for each power source (7a, 7b) the drawn current (I) to the maximum current (Imax) for the respective power source (7a, 7b) by distributing the total drawn electric current among the power sources
    20 (7a, 7b) and limit the total drawn electric current to the sum of the set maximum permitted current values of all connected power sources (7a, 7b) by regulating the speed (s) at a desired pressure (pset) or the pressure (p) at a desired flow rate (Qset).
    [28]
    Method according to claim 27, characterized in that the total drawn electric current (I) is proportional1 or according to a selected priority per connection (6) is distributed among the connected
    30 power sources (7a, 7b).
    BE2017 / 5241
    [29]
    Method according to any one of claims 21 to 28, characterized in that it uses a compressor or pump (1) according to any one of claims 1 to 19.
    BE2017 / 5241
    BE2017 / 5241 / 3a __ 3 / Ta- ''] <£> a (/ 7X ~ 7a
    7-Π
    7b
    3/3/9 □ Pset ^ Qset
    7 - / 7b -eb
    Γ%
    3b 13a - ~ one set j ---! - ~ - ^ 7 !
    n seti,
    400 ^ 480
    BE2017 / 5241
    Electrically driven mobile compressor or pump and method of controlling the maximum current that can be drawn from a power source by the compressor or pump.
    Electrically driven mobile compressor or pump, comprising at least one compressor or pump element (2) for supplying a fluid under pressure to a network (3) of consumers (4) of such fluid under pressure; an electric drive motor (5) coupled to the compressor or pump element (2) with variable speed control and a control (8) for variable speed control of the electric drive motor (5} in function of the demand from the mains (3) compressed gas and / or pressure flow rate, and a connection for connecting the compressor or pump (1) to an electrical power source (7), characterized in that the control (8) is provided with an algorithm (10} with which the power source is (7) drawn electric current (I) can be limited to a set or adjustable maximum value (Imax) by speed regulation.
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    同族专利:
    公开号 | 公开日
    BE1024065A9|2017-12-19|
    BE1024040B1|2017-11-06|
    EP3440356A1|2019-02-13|
    CN108884825B|2020-06-30|
    BE1024040A1|2017-10-31|
    BR112018070513A2|2019-01-29|
    BE1024065A1|2017-11-09|
    BE1024065B9|2017-12-19|
    BE1024542A1|2018-03-28|
    WO2017173507A1|2017-10-12|
    BE1024065B1|2017-11-10|
    US20190128262A1|2019-05-02|
    EP3440356B1|2020-08-05|
    CN108884825A|2018-11-23|
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    法律状态:
    2018-04-09| FG| Patent granted|Effective date: 20180405 |
    优先权:
    申请号 | 申请日 | 专利标题
    BE2016/5245A|BE1024040B1|2016-04-08|2016-04-08|ELECTRIC POWERED MOBILE COMPRESSOR|
    BE2016/5245|2016-04-08|
    BE20165759A|BE1024065B9|2016-04-08|2016-10-10|Electrically driven mobile compressor or pump and method for controlling the maximum current that can be taken by the compressor or pump from a power source.|CN201780022242.2A| CN108884825B|2016-04-08|2017-04-07|Electrically driven mobile compressor or pump and method for controlling same|
    BR112018070513A| BR112018070513A2|2016-04-08|2017-04-07|electrically driven mobile compressor or pump and method for controlling the maximum current that can be drained by the compressor or pump from a supply source|
    PCT/BE2017/000024| WO2017173507A1|2016-04-08|2017-04-07|Electrically driven mobile compressor or pump and method for controlling the maximum current that is taken from a power supply|
    EP17729754.6A| EP3440356B1|2016-04-08|2017-04-07|Electrically driven mobile compressor or pump and method for controlling the maximum current that is taken from a power supply|
    US16/089,470| US20190128262A1|2016-04-08|2017-04-07|Electrically driven mobile compressor or pump and method for controlling the maximum current that is taken from a power supply|
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