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    • 专利摘要:
    The invention relates to a method for operating a voltage supply system, preferably in a lighting system (A), a voltage supply system (C) for a bus carrying voltage in the idle state with at least two supply units (1) connected in parallel and a supply unit (1) for voltage in the idle state leading bus (3), the supply unit (1) being designed to supply bus subscribers (8, 8 ', 8 ", 8"') with a DC voltage by means of the bus (3), with a maximum current draw (Ix) from the bus (3) by bus subscribers (8, 8 ', 8' ', 8' '') is limited to a predetermined value, having a circuit that is set up to monitor the current consumption of current from the bus (3) by short-circuiting the bus (3).
    公开号:AT16855U1
    申请号:TGM325/2015U
    申请日:2015-11-05
    公开日:2020-11-15
    发明作者:
    申请人:Tridonic Gmbh & Co Kg；
    IPC主号:
    专利说明:

    description
    SUPPLY UNIT FOR A BUS
    The invention relates to a method for operating a voltage supply system, preferably in a lighting system, a voltage supply system for a bus carrying voltage in the idle state with at least two supply units connected in parallel and a supply unit for a bus carrying voltage in the idle state, the supply unit being designed for this purpose To supply bus subscribers with a DC voltage via the bus.
    The lighting system preferably has the bus, which is designed to carry voltage in the idle state and therefore to serve as a voltage supply for actuators and sensors in the lighting system. An example of such a bus is the Digital Addressable Lighting Interface, or DALI for short, which is standardized in IEC 62386.
    In building automation, DALI is a protocol for controlling lighting operating devices, such as switching power supplies, electronic ballasts or electrical power dimmers, in order to control lamps, monitor their operating status and / or supply them with power.
    Each operating device that has a DALI interface can be controlled individually via corresponding DALI addresses and can change the intensity of a lamp or a sensor system in the lighting system. Actuators are also provided. A bidirectional data exchange between a DALI control device and a DALI device determines, for example, the status of an individual light source or a group of light sources or the operating device itself and can also control it. DALI uses a serial asynchronous data protocol with a transmission rate of 1200 bis at a voltage level of 16 V using two-wire communication.
    [0005] The lighting system is supplied with energy via a separate bus. Two communication lines DA + and DA- are preferably galvanically isolated from this mains supply and free of polarity. These two communication lines DA + and DA- also serve as voltage supply lines. These lines can be laid in any topology, i.e. star, line or tree structure.
    Terminating resistors at the end of the power supply lines are not necessary. The two communication lines, which also serve as supply lines, are referred to below as the live bus.
    From the DALI standard IEC 62386 it can be derived that a maximum of 64 actuators can be controlled per bus. The maximum current consumption of the bus is limited to a predetermined value and is preferably 250 milliamps, which is referred to below as the maximum current consumption.
    To ensure that the maximum current consumption of 250 milliamperes from the bus is not exceeded, a special DALI supply unit is provided. This DALI supply unit generates a constant output current of nominally 200 milliamps to 250 milliamps with a voltage supply of 16 volts when the lighting system is in sleep mode.
    The bus subscribers connected to the bus are not designed for an actual current draw above the predetermined value for a maximum current draw, so that the bus subscribers are to be protected from a current draw above the maximum current draw. In particular, a parallel connection of several DALI supply units is therefore not possible, since a parallel connection would generate an output current on the bus that is above the maximum current consumption.
    In addition, it is provided according to DALI standard IEC 62389 that a communication
    tion between individual elements of the lighting system, hereinafter also referred to as bus participants, is impossible via the bus before a start procedure waiting time has expired. Only after this start procedure waiting time has elapsed is the DALI bus considered stable and allows communication between the bus participants. The start procedure waiting time is preferably 600 milliseconds.
    [0011] If several DALI supply units were to be operated in parallel, a current flowing through the bus could exceed the maximum current draw within this start procedure waiting time, whereby the bus participants would possibly be overloaded and thus damaged or destroyed.
    In addition, it is not possible in the DALI lighting system bus to operate a DALI lighting element, for example a light source or power dimmer or electronic ballast, independently of a DALI supply unit.
    When planning lighting systems in buildings or parts of buildings, there is sometimes the desire to provide a lighting system that is as flexible as possible. It is therefore desirable to install a large number of smaller lighting systems, for example with a small number of light sources, actuators and sensors. With such a small number of elements, the maximum current draw of 250 milliamperes is never reached.
    Alternatively or additionally, it is desirable to cluster the bus flexibly, that is to say to connect the bus users in the bus as flexibly as possible to a first or a second lighting subsystem or to flexibly expand an existing lighting system. Since several DALI supply units are not connected in parallel according to the DALI standard, a separate DALI supply unit must be provided for each conceivable cluster.
    The comparatively cost-intensive DALI supply units are to be used in all of these design variants. When using such DALI supply units, the supply of the bus of the lighting system would be disadvantageously oversized, on the one hand, and, on the other hand, only expensive to manufacture.
    It is therefore the object of the present invention to provide a voltage supply system and a supply unit which can be used specifically for smaller lighting applications, for example for operating a single-digit number of actuators and sensors, and which eliminates the disadvantages mentioned above. In particular, a lighting system should be supplied with energy in a highly flexible manner, whereby the supply unit used for this should not be oversized and the DALI standard should nevertheless be complied with.
    [0017] The object is achieved with the measures described in the independent claims. Advantageous configurations are described in the respective dependent claims.
    In a first aspect of the invention, a supply unit for a bus carrying voltage in the idle state is proposed. The bus subscribers are supplied with a DC voltage by means of the bus, with a maximum current draw from the bus by bus subscribers being limited to a specified value. For this purpose, the supply unit has a circuit which is set up to detect the current consumption of current from the bus by short-circuiting the bus.
    With this circuit, the currently recorded current consumption of the bus is thus recorded, so that an exceeding of the predetermined value for the maximum current consumption can be detected. Measures can thus be initiated to limit the current consumption or to determine whether the supply unit can feed additional current onto the bus without exceeding the value.
    The idle state means a bus state in which only a voltage or a current is carried on the bus and in particular no data communication takes place.
    A predetermined value is, for example, the maximum permissible current according to DALI
    Default. This value is stored, for example, in a storage unit of the supply unit and can also be adapted for a respective changed lighting system.
    The circuit of the supply unit preferably has a short-circuit switch which is suitable for short-circuiting the bus. In addition, a control unit is provided in the circuit of the supply unit, the control unit being set up to switch the short-circuit switch to a first switching state in which the bus is short-circuited and to switch the short-circuit switch to a second switching state in which the short-circuit of the bus is canceled . The control unit is also set up to detect the current current draw from the bus in the first switching state of the short-circuit switch.
    [0023] The bus is preferably a DALI-standardized bus of a lighting system. At least one bus participant is an element in the lighting system. The lighting system should preferably be operated in accordance with the DALI standard IEC 62389.
    As an element in the lighting system, for example, a lighting means, an operating device for a lighting means, a power dimmer, an actuator and / or a sensor for a lighting system is to be understood.
    The bus thus comprises two supply lines DA + and DA-, which connects all connected bus users with the supply unit in parallel. These supply lines are connected in parallel with each element of the lighting system in a different topology.
    According to the invention it is now provided that a short-circuit switch is provided in the circuit of the supply unit in order to connect the supply lines of the bus or to open an existing connection. In the connection between the supply lines there is, for example, a measuring element, preferably a current measuring resistor. The control unit of the circuit is set up to detect a current by means of the measuring element, for example by detecting a voltage drop across the current measuring resistor, which is converted in the control unit to a detected current consumption.
    Thus, the supply unit of the bus can recognize whether a current consumption from the bus corresponds to a maximum current consumption or even exceeds it. The supply unit will not provide any additional energy for the bus if the maximum current consumption has been reached or has already been exceeded.
    In this way a modular supply system for the bus is obtained. The supply unit preferably has a maximum output current which corresponds to a fraction of the maximum current consumption of the bus. For example, the output current of the supply unit is one tenth or one fifteenth of the maximum current consumption. In this way, more economical supply units can be used.
    Thus, several supply units can be connected in parallel in a voltage supply system and it is always ensured that the maximum current consumption is not exceeded. A parallel connection thus offers the possibility that an energy supply of the bus can be expanded / enlarged as desired and further elements in the lighting system can be supplied by connecting further supply units in the voltage supply system. A flexible clustering of the lighting system in a building or part of a building is thus achieved.
    In a preferred embodiment, the supply unit can be operated in a master mode in which the supply unit is the main supply of the bus. In addition, the supply unit can be operated in a slave mode, in which the supply unit is an auxiliary supply to the bus if required, the supply unit being operable in master mode or in slave mode depending on the current consumption of current from the bus.
    [0031] If there are several supply units in a voltage supply system, a main supply can be ensured by a first supply unit,
    at least one further supply unit can be switched on if necessary, as long as the maximum current consumption from the bus is not exceeded. The main supply is provided by the supply unit in master mode. Only one supply unit per lighting system needs to be operated in master mode.
    In a preferred embodiment, the DC voltage or the output current is provided to the bus when the short-circuit switch is switched to the second switching state. This ensures that the supply unit does not initially supply the bus as long as the current current consumption from the bus has not been recorded. Only when it is ensured that the supply does not exceed a maximum current consumption will the supply unit provide an additional output current to the bus. The short-circuit switch is thus switched independently of the provision of the energy supply.
    In a preferred embodiment, the supply unit can be operated with an alternating supply voltage. The supply unit thus includes a voltage reduction and, if necessary, a rectification. The AC supply voltage is, for example, a line voltage of 230 volts at 50 Hertz. Other nominal mains supply values are not excluded from the concept of the invention.
    In a preferred embodiment, the control unit is set up to detect a current voltage value on the bus after the current consumption of current has been recorded. The voltage value detection is used to determine whether further supply units are connected to the bus.
    In a preferred embodiment, the control unit is set up to compare the current current consumption with the predetermined value for a maximum current consumption, the supply unit being operated in master mode when the predetermined value is exceeded.
    The control unit is preferably set up to record the current current draw only after an individual random waiting time has elapsed. This means that the acquisition takes place at different times on the bus.
    In a further aspect of the invention, a voltage supply system, preferably for a lighting system, is provided for a bus carrying voltage in the idle state. A maximum current consumption from the bus by bus users is limited to a specified value. The voltage supply system comprises at least two supply units connected in parallel to the bus according to the type described above, each of the supply units being designed to supply bus users with a DC voltage by means of the bus, each of the supply units having a circuit that is set up that to record current power consumption from the bus by short-circuiting the bus. The supply units selectively short-circuit the bus in order to record the current consumption.
    By selective short-circuiting, each power supply unit in the power supply system autonomously detects the current power consumption from the bus and independently decides whether or not a further power supply is permitted on the bus.
    Each of the supply units preferably waits for an individual random waiting time in an initialization phase before the circuit detects the current consumption of the bus.
    Preferably, based on a comparison between the currently recorded current consumption and the specified value of the maximum current consumption from the bus by bus users in each supply unit, it is decided which of the supply units is operated as the main supply or auxiliary supply in the voltage supply system.
    According to the invention, the supply units are operated as the main supply unit or auxiliary supply unit only after a preset start delay time has elapsed in the initialization phase. In this way it is ensured that a current consumption is not recorded simultaneously by two supply units in the same lighting system
    is carried out. A falsification of measurement results is thus prevented.
    In a further aspect of the invention, a method for operating a voltage supply system according to the type described above is described. The method comprises the method steps: initializing the voltage supply system, for which purpose an individual random waiting time is awaited in each supply unit of the voltage supply system; Detection of a current power consumption from the bus by bus users by selective short-circuiting of the bus of each supply unit; Operating the respective supply unit either in a master mode or in a slave mode, the mode being selected as a function of the currently detected current consumption from the bus; and checking a period of time in which the bus is short-circuited, the method being restarted if a maximum short-circuit period is exceeded.
    [0043] The invention thus relates to an intelligent starting method for supplying voltage to a bus, preferably in a lighting system. The method runs in particular before the start delay expires, which is required to stabilize the bus for data communication. A number of supply units can be connected in parallel without actual communication taking place between the DALI components after a start time of 600 milliseconds has elapsed.
    The supply units are designed as minimal supply units so that their constant output current corresponds to a value of one tenth, for example 20 milliamperes, of the maximum current drawn from the bus. In this way, many supply units can be connected in parallel without exceeding the maximum current consumption in the DALI lighting system. In this way, all elements in the lighting system are protected against overload even during the start-up procedure.
    In the method, a random waiting time ensures that one of the supply units on the bus qualifies as the master supply unit. After the random waiting time has elapsed, all other supply units are set up to detect the flow of water from the bus, a short-circuit switch being made possible for this by a control unit of the supply unit.
    The detection is preferably carried out after the supply unit detecting the current draw provides a DC voltage for the bus, with the detecting supply unit deactivating its DC voltage supply for the bus when the predetermined value of the maximum current draw is exceeded. This deactivation serves to protect the bus users connected to the bus.
    The detection preferably takes place again after the supply unit detecting the current consumption has deactivated a DC voltage for the bus. If, following the renewed acquisition, the current consumption is still above the maximum current consumption, the supply unit is switched to master mode operation. A master mode waiting time is then waited for and a current draw is recorded until the currently recorded current draw is below the maximum current draw.
    [0048] The method for operating a supply unit in slave mode preferably comprises the following further method steps: the supply unit acquires a voltage value on the bus; Renewed acquisition of the current current consumption from the bus only in the event that the acquired voltage value is above a reference voltage value; and operating the supply unit in the master mode in the event that the renewed detection shows that the currently detected current draw is above a predetermined value of a maximum current draw from the bus by bus users. In the master mode operation, current consumption is recorded until the currently recorded current consumption is below the maximum current consumption.
    In this way, in the slave mode of the supply unit, it is determined whether other supply units are connected to the bus.
    In a preferred embodiment, the slave mode comprises the further method steps: waiting for a master mode waiting time in the event that the renewed detection shows that the currently detected current draw is below a predetermined value of a maximum current draw from the bus by bus users is; and renewed detection of the voltage value on the bus, this supply unit being switched off if the renewed detection of the voltage value shows that the newly detected voltage value is below the reference voltage value. In this way, it is detected that a master supply unit has already been connected to the bus.
    In a preferred embodiment, the power supply unit is operated in a master mode by means of the following method steps: waiting for a master mode waiting time; Re-recording of the current power taken from the bus; and canceling the short circuit of the bus in the event that the renewed detection shows that the detected current consumption is below a predetermined value of a maximum current consumption from the bus by bus users.
    In this way it is achieved that a master mode waiting time is first waited in order not to compete with a supply unit of the voltage supply system that is already in master mode. During this waiting time, each individual supply unit is deactivated in slave mode if the recorded current consumption from the bus is above a maximum current consumption, for example 250 mA. In this way a current overload is excluded.
    [0053] The master mode operation preferably comprises the further method steps: detecting a voltage value on the bus; Waiting for a random waiting time in the event that the detection shows that the detected voltage value is above a reference voltage value; Shorting the bus; and reacquiring the current current draw from the bus.
    The method enables quasi-communication between supply units connected in parallel in a voltage supply system without actually having to wait for a start procedure time until a stable data bus is obtained.
    The invention and further embodiments and advantages of the invention are explained in more detail below with reference to figures, the figures merely describing exemplary embodiments of the invention. The same components in the figures are provided with the same reference symbols. The figures are not to be regarded as true to scale; individual elements of the figures can be shown exaggeratedly large or exaggeratedly simplified.
    [0056] FIG. 1 shows a supply unit according to the prior art. Fig. 2 shows an embodiment of a supply unit according to the invention.
    3 shows an exemplary embodiment of a lighting system with a voltage supply system according to the invention.
    4 shows an exemplary flow chart of a method according to the invention for operating a voltage supply system.
    FIG. 5 shows an exemplary flow chart of an initialization phase of the method according to the invention according to FIG. 4.
    FIG. 6 shows an exemplary flowchart of a first current consumption-recording phase of the method according to the invention according to FIG. 4.
    FIG. 7 shows an exemplary flow chart of slave mode operation of the method according to the invention according to FIG. 4.
    8 shows an exemplary flowchart of a master mode operation of the method according to the invention according to FIG.
    In Fig. 1, a supply unit 1 is shown according to the prior art. The
    Supply unit 1 comprises input connections 2, shown as mains line L and the neutral line N. According to the invention, the use of a supply unit 1 which additionally has a protective conductor PE is not excluded. The supply unit 1 also has a DALI interface, which is shown here as bus 3 with the lines DA + and DA-. Such DALI supply units serve to supply a bus 3 with a DC voltage to which DALI operating devices, electronic ballasts or power dimmers, actuators or sensors are connected as bus users. The supply unit according to FIG. 1 is set up to supply the bus 3 with a current of 240 milliamps. The supply unit is the only supply in a lighting system according to the prior art. A mains supply voltage of 220 volts to 240 volts is applied to the input connections 2. The mains supply voltage typically has a mains frequency of 50 Hertz or 60 Hertz. The supply unit is therefore designed to deliver an output of 5 watts. The output voltage is 16 volts with a +/- 5% tolerance. The DALI signal is not a SELV.
    In particular, the DALI standard IEC 62386 is complied with with such a DALI supply unit.
    The disadvantage of the existing DALI system is that such DALI supply units 1 cannot be connected in parallel, because the output current must not exceed a maximum current draw of 250 milliamperes from bus 3. Communication between the individual DALI supply units is not possible, in particular until a stabilized DALI data communication bus has been set up, so that even later regulation of the DALI supply unit would not prevent the elements in lighting system A from being operated with too high a current what damage or even destruction would mean.
    The DALI supply unit 1 according to the prior art is oversized for a large number of applications in lighting technology. A more cost-effective modular and flexible supply of the bus 3 for a minimalist lighting system is therefore desirable.
    According to the invention, an alternative approach for supplying a bus 3 with a DC voltage is therefore proposed. In this case, quasi-communication between supply units 1 connected in parallel is to be made possible. The DALI-standardized maximum current consumption of a maximum of 240 mA is not exceeded even with the supply units proposed according to the invention. Individual adaptation to existing DALI lighting systems is thus possible, with individual clustering of the lighting systems now being made possible.
    A supply unit 1 according to the invention is shown in FIG. 2. In addition to the connections 2, 3 shown in FIG. 1, a control unit 4 is provided in the supply unit 1 according to the invention. The control unit 4 is designed, for example, as a microcontroller, as an ASIC, as an FPGA or CPLD. The control unit 4 is connected to the bus 3. A short-circuit switch 5 is also provided in the supply unit 1. The short-circuit switch 5 is provided in order to short-circuit the bus 3. For this purpose, the short-circuit switch 5 has a first switching state | to connect the DA + and DA- lines together. In a second switching state II, the short-circuit switch 5 cancels a connection between the power supply lines DA + and DA-. The change of the switching state of the short-circuit switch 5 is initiated by the control unit 4. For this purpose, a switching signal is generated by the control unit 4. The short-circuit switch 5 can now be used to detect a current drawn from the bus 3, which flows through the supply lines DA +, DA-. For this purpose, a measuring element 6 is provided in the connection between the supply lines DA +, DA-. The control unit 4 is provided to detect a voltage drop across, for example, a measuring element 6 designed as a current measuring resistor when the short-circuit switch 5 shorts. Alternatively, a galvanic coupling takes place by means of the measuring element 6, for example by means of coupled coils, or alternatively by means of an optocoupler. The recorded current consumption from the bus 3 is evaluated in the control unit 4. Depending on the level of the current value
    and in comparison to a predetermined value I, for a maximum current consumption, for example 240 mA according to the DALI standard IEC 62389, an energy supply is then provided on the bus 3 by the supply unit 3 and the switch 5 is opened or the energy supply is not provided and opening the switch 5.
    According to the invention, a storage element 7 is provided in the supply unit 1. In this memory element 7, for example, DALI addresses, DALI lighting groups, DALI lighting scenarios and / or dimming values, which are provided for a specific setting of the lighting system A, are stored. When an operating device 8 in the lighting system A is changed, the setting of the lighting system A can now be saved by means of the memory 7. All relevant data of the elements 8 connected to the lighting systems A can thus be stored in the memory 7. This data in the memory 7 thus serves as backup data in the event that an operating device in the lighting system A needs to be replaced.
    In this way, basic functionalities, for example firmware settings or regulations, can also be stored in the memory 7. If an operating device is replaced, these data are loaded from the memory 7 and are immediately available in the lighting system without complex initialization or installation. Additional functions such as dimming, group lighting and emergency lighting scenarios can also be contained in memory 7.
    A lighting system A according to the invention is shown in FIG. 3. The lighting system A comprises a voltage supply system C consisting of a first supply unit 1 and a second supply unit 1 ', as shown for example in FIG. 2. The bus 3 is used to supply the elements 8, 8 ', 8' and 8 "with a DC voltage from the supply units 1, 1 '. The elements 8, 8', 8 'and 8" are, for example, operating devices for Light sources or power dimmers or electronic ballasts or sensor elements or operating devices for actuators in the lighting system A.
    The lighting system A according to FIG. 3 is DALI-standardized. The lighting system A is a comparatively small lighting system A because only four elements need to be operated. These four lighting elements 8, 8 ', 8' and 8 "can now be interconnected differently than operated in different clusters. For example, a cluster B could be formed from the two elements 8 and 8 '. Such a small cluster B can be made using a of the two supply units 1, 1 '. A further cluster B' can be formed from the elements 8 "and 8" and can also be supplied with power by one of the supply units 1 or 1 '. For example, a third cluster B ”, In which all four lighting elements 8, 8 ', 8' and 8 '"' are to be operated in the lighting system A at the same time. In such a cluster B "", at least two supply units 1, 1 'are to be provided in order to generate the electricity required for this.
    The clustering takes place, for example, when installing or planning the lighting system A. In order not to have to commit at such an early stage, a flexible, modular and changeable structure can now be obtained by means of supply units 1, 1 'that can be connected in parallel.
    The number of supply units 1, elements 8 and clusters B is only exemplary and according to the invention is not limited to this number.
    In order to be able to operate this lighting system A according to the DALI standard, it must be ensured that at no point in time does the current current draw rise above a predetermined value I for a maximum current draw, but all elements 8 are sufficiently supplied with energy. In addition, it must be ensured that the supply is available within the waiting time of 600 milliseconds. This is made possible by a method for operating the voltage supply system C, as shown by way of example in FIGS. 4 to 8.
    In FIG. 4, an exemplary embodiment of a method flow diagram for an inventive
    proper method for operating a voltage supply system C described. The voltage supply system C is constructed, for example, as in FIG. 3 and comprises at least two supply units 1, 1 '.
    An initialization phase of the method according to the invention is initiated in step S1. The initialization phase is explained in more detail in FIG. In this phase S1, it is prevented in particular that two supply units 1, 1 'simultaneously switch the short-circuit switch 5 to the first switching state | switch.
    After the initialization phase, there is a first current consumption-recording phase S2. This current consumption-detection phase S 2 is explained in more detail in FIG. 6.
    The result of the current consumption detection phase S 2 is a comparison result of the extent to which a currently recorded current consumption from the bus 3 is greater than a specified value Ix of a maximum current consumption, for example the maximum permissible current of 240 milliamperes when a lighting system is operating A according to the DALI standard. If the current consumption is greater than the specified value I in the lighting system (yes case), the master mode operation S4 is initiated. If the answer is no, slave mode operation S3 is initiated for the respective supply unit 1. Following slave mode operation S3 or master mode operation S4, a time period check S5 is carried out in which it is checked whether the short-circuit switch 5 one of the supply units 1, 1 'beyond a maximum permissible time Tx in the switching state | is switched. If this is the case, the process is started again. If this is not the case, the operation is maintained as it is set.
    The method according to FIG. 4 is preferably completed before a start procedure waiting time of 600 milliseconds has elapsed. Thus, before the end of a stabilization of the DALI bus 3, a quasi-communication between the supply units 1 is already generated and a stable operation of the lighting system 1 is guaranteed.
    The initialization phase S1 of the method according to the invention according to FIG. 4 is shown in more detail in FIG. For this purpose, the voltage supply system A is first switched on in step S11. The short-circuit switch 5 is then switched to the first switching state | in step S12. In this way, the bus supply line DA + is connected to the bus supply line DA-. A switch-on waiting time T switch-on is then waited for in step S13. This is necessary in order to ensure that the supply unit 1 operates in a stable manner for the control unit 4 to correctly record the current consumption. In the following step S14, the supply unit 1 experiences a random waiting time Tzuraı which must be awaited. This random waiting time Tzuraı is individual for each supply unit in the voltage supply system C, so that simultaneous current consumption detection by different supply units 1 is prevented. In this way, the detection of a current consumption falsified by another supply unit 1 is prevented.
    In FIG. 6, a first current consumption recording phase S2 according to FIG. 4 is shown. For this purpose, a current current draw from bus 3 is recorded in step S21. The short-circuit switch 5 is still closed for this purpose, see initialization phase S1. The control unit 4 detects the current consumption by the measuring element 6. In the following step S22, a comparison is made between the current consumption with a predetermined value I of the maximum current consumption by the control unit 4 less than or equal to the predetermined value I, so the first current consumption detection phase S2 is ended.
    Is the currently detected current draw | greater than the specified value I., the supply unit 1 is deactivated in step S23. The current consumption from bus 3 is then recorded again in step S24. A comparison S25 then takes place again, which corresponds to comparison S22. Is the currently recorded current consumption | less than or equal to the predetermined value I, the supply unit 1 is operated in slave mode operation S3 and the acquisition phase S 2 is ended. Is the currently recorded current consumption | greater than the specified value I., the first current consumption-recording phase S2 is ended, the
    Supply unit 1 is operated in master mode S4, however.
    In FIG. 7, the slave mode operation S3 according to FIG. 4 is described in more detail. The slave mode operation S3 is switched if in step S25 or in step S22 the detected current consumption is less than the specified value I ... Then in step S31 the short-circuit switch 5 is opened by switching to the switching state II. The DA + line of bus 3 is thus separated from the DA line of bus 3. A voltage value U of bus 3 is then detected in step S32. If a comparison S33 shows that the voltage is lower than a reference voltage value U 1, for example 9 V, it is assumed that no further supply unit 1 is present in the voltage supply system C. If the comparison shows that the voltage is greater than, for example, 9 V, then another random time Tzuaı is waited for in step S34. The short-circuit switch 5 is then in the closed state | switched, see step S35. The current power consumption from bus 3 is again recorded in accordance with steps S36 and S37. Here the currently recorded current consumption is compared again with the value I, with a change to the master mode according to S4 when the value I is exceeded.
    If the current consumption is less than the value I. It is assumed that no further supply unit 1 is active in the voltage supply system C and the short-circuit switch 5 can be brought back to the state II according to S38. After waiting for a master mode waiting time Tmaster, the supply unit 1 is switched off in step S3 9, see step S40. The slave mode S3 is then ended.
    In FIG. 8, the master mode operation S4 according to FIG. 4 is now shown in more detail. First, a master mode waiting time Tmaster is awaited in step S41.
    The current current consumption is then recorded again in steps S42 and S43. In this way, it is detected whether the current withdrawal of the stream is below the value I. In this phase, each supply unit 1 of the slave mode operation S3 switches itself off, since a current current consumption above the value I was recorded and the current current consumption from the bus 3 is to be reduced.
    As soon as the current consumption of current is below the value I., the short-circuit switch 5 is switched to the open state | according to step S44. The voltage on bus 3 is now detected in a manner similar to steps S33 and S32 in accordance with steps S45 and S46. If the voltage is greater than a reference voltage value U ,, it is assumed that there is only one master supply unit 1 in the lighting system A and that this takes over the main supply. If it is determined in step S46 that the voltage is lower than the reference voltage value Ux, there are further supply units 1, 1 'in the lighting system 1 in the master mode. A random waiting time Tzufan is then waited for (S47) and the short-circuit switch 8 returns to the switching state | switched according to step S48. A current consumption detection takes place again in step S49. If the current consumption is greater than the value I, the master mode is run through again in accordance with step S4.
    The process sequences described in FIGS. 4 to 8 ensure that the maximum current draw is never above a value I and that the lighting system A can be adapted to its corresponding clustering B, B ', B ".
    All features shown, illustrated or claimed can be combined with one another as desired.
    REFERENCE CHARACTERISTICS LIST:
    1 power supply unit
    2 input connector
    3 power supply lines
    4 control unit
    5 short circuit switches
    6 Current sense resistor
    7 memory area
    8 element in the lighting system
    Ss1 initialization phase
    S2 First current consumption acquisition phase Ss3 Slave mode operation
    Ss4 master mode operation
    s5 connection duration checking step
    S11-S14 initialization steps
    S21-525 Current Draw-Acquisition Steps S31-S40 Slave Mode Steps
    S41-S49 Master Mode Steps
    A lighting system B, B ', B "lighting subsystem, cluster C power supply system
    | First switching state II Second switching state
    Ix current reference value
    Ux Voltage reference value T Random Random waiting time
    T Master Master mode waiting time T Switch on start delay time
    Tx connection time
    权利要求:
    Claims (10)
    [1]
    1. Supply unit (1) for a bus (3) carrying voltage in the idle state, the supply unit (1) being designed to connect bus subscribers (8, 8 ', 8 ”, 8”) to a DC bus by means of the bus (3) To supply voltage, a maximum current consumption (I) from the bus (3) by bus subscribers (8, 8 ', 8 ”, 8”) being limited to a predetermined value, having a circuit that is set up to output the current current the bus (3) by short-circuiting the bus (3).
    [2]
    2, supply unit (1) according to claim 1, wherein the circuit comprises:
    - A short-circuit switch (5) for short-circuiting the bus (3); and
    - A control unit (4), wherein the control unit (4) is set up:
    - To switch the short-circuit switch (5) to a first switching state (I) in which the bus (3) is short-circuited; and
    - To switch the short-circuit switch (5) to a second switching state (II) in which the short-circuit of the bus (3) is canceled;
    - wherein the control unit (4) is further set up to detect the current power consumption from the bus (3) in the first switching state (I) of the short-circuit switch (5).
    [3]
    3. Supply unit (1) according to one of claims 1 or 2, wherein the bus is a DALI-standardized bus of a lighting system (A) and wherein at least one bus subscriber (8, 8 ', 8 ", 8") is an element in the lighting system ( A) is.
    [4]
    4. Supply unit (1) according to one of the preceding claims, wherein the supply unit (1) can be operated in a master mode (S4), in which the supply unit (1) is the main supply of the bus (3) or in a slave mode (S3) can be operated, in which the supply unit (1) is an auxiliary supply of the bus (3) when required and the supply unit (1) in the master mode (S4) or depending on the current recorded flow from the bus (3) can be operated in slave mode ($ S3).
    [5]
    5. Supply unit (1) according to one of claims 2 to 4, wherein the DC voltage can be provided to the bus (3) when the short-circuit switch (5) is switched to the second switching state (II).
    [6]
    6. Supply unit (1) according to any one of the preceding claims, wherein the circuit is set up to compare the currently recorded current consumption with the predetermined value (1) of the maximum current consumption, the supply unit (1) in the master when the predetermined value (1) is exceeded Mode (S4) is operated.
    [7]
    7. Supply unit (1) according to one of claims 2 to 6, wherein the control unit (1) is set up to record the current current consumption only after an individual random waiting time (Tzuraı) has expired.
    [8]
    8. Power supply system (C) for a bus (3) carrying voltage in the idle state, with a maximum current consumption (I) from the bus (3) being limited to a predetermined value by bus users (8, 8 ', 8 ”, 8'”) having at least two supply units (1) connected in parallel to the bus (3) according to one of claims 1 to 7, wherein each of the supply units (1) is designed to use bus subscribers (8, 8 ', 8 ", 8"') of the bus (3) with a DC voltage, each of the supply units (1) having a circuit which is set up to detect the current consumption of current from the bus (3) by short-circuiting the bus (3) and wherein the Supply units (1) selectively short-circuit the bus in order to record the current consumption.
    [9]
    9. Power supply system (C) according to claim 8 for a lighting system (A), wherein at least one bus participant (8, 8 ', 8 ", 8") is an element in the lighting system (A) and wherein the bus (3) is a DALI standardized bus (3) of the lighting system (A).
    [10]
    10. A method for operating a voltage supply system (C) according to one of the preceding claims 8 to 12 with the method steps:
    - Initialization (S1) of the voltage supply system (C), for which purpose an individual random waiting time (Tzufaı) is awaited (S14) in each supply unit (1) of the voltage supply system (C);
    - Detection (S2) of a current consumption of current from the bus (3) by bus subscribers (8, 8 ', 8 ", 8") by selective short-circuiting (S12) of the bus (3) of each supply unit (1);
    - Operating the respective supply unit (1) either in a master mode (S4) or in a slave mode (S3), the mode (S3, S4) being selected as a function of the currently detected current consumption from the bus (3); and _
    - Checking (S5) a time period in which the bus (3) is short-circuited, the method being restarted when a maximum short-circuit time period (T 1) is exceeded.
    In addition 7 sheets of drawings
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    同族专利:
    公开号 | 公开日
    DE102015217835A1|2017-03-23|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    EP0749070A2|1995-06-12|1996-12-18|Landis & Gyr Technology Innovation AG|Method for decentralised supply of a bus and apparatus for carrying out the method|
    US20120323399A1|2011-06-15|2012-12-20|Encelium Holdings, Inc.|Bus network|
    EP2770674A2|2013-02-21|2014-08-27|Siemens Aktiengesellschaft|Master bus device for a building installation bus and method for providing a voltage supply to the building installation bus|
    DE102013017019A1|2013-10-15|2015-04-16|Tq-Systems Gmbh|Dall bus auxiliary circuit|
    AU2012101745B4|2012-12-03|2013-04-18|Gerard Lighting Holdings Pty Ltd|Reduced dissipation DALI power supply|DE102018202962A1|2018-02-28|2019-08-29|Tridonic Gmbh & Co Kg|Bus-capable lighting system subscriber with decentralized bus supply|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    DE102015217835.8A|DE102015217835A1|2015-09-17|2015-09-17|Supply unit for a bus|
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