• 专利附录
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    • 专利摘要:
    The invention relates to an induction cooking device device, with an inverter unit (10a; 10b) that is intended to generate a heating current. In order to increase the efficiency, it is proposed that the cooking appliance device has a detection unit (12a; 12b) which is designed to detect a smooth switching process of the inverter unit (10a; 10b) by means of minus one flank of an electrical signal. (Machine-translation by Google Translate, not legally binding)
    公开号:ES2583206A2
    申请号:ES201530356
    申请日:2015-03-18
    公开日:2016-09-19
    发明作者:José Miguel Burdio Pinilla；Sergio Llorente Gil；Oscar Lucia Gil；Daniel Palacios Tomas；Diego Puyal Puente；Hector Sarnago Andia
    申请人:BSH Hausgeraete GmbH；BSH Electrodomesticos Espana SA；
    IPC主号:
    专利说明:

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    INDUCTION COOKING DEVICE DEVICE WITH AN INVESTING UNIT AND COOKING DEVICE WITH SAID
    DEVICE
    DESCRIPTION
    The invention refers to an induction cooking device with an inverter unit that is intended to generate a heating current.
    From the US patent application US 5 166 549 A, a cooking device device with an inverter and with a detection unit is known that is intended to monitor a switching process without inverter voltage by means of measuring the tension.
    The invention solves the technical problem of providing a more efficient generic cooking appliance device. According to the invention, this technical problem is solved by means of an induction cooking device, with an inverting unit that is intended to generate a heating current, where it is proposed that the cooking device has a detection unit that is intended to detect a smooth switching process of the inverter unit by means of at least one flank, in particular, of a flank of an over-oscillation behavior, of an electrical signal. The cooking appliance device is at least a part, in particular, a construction subgroup, of a cooking appliance, in particular, of a cooking oven, of a microwave and / or, preferably, of an induction cooking field . The cooking appliance device has one or more, preferably two and, advantageously, four or more heating units, each of which is intended to be supplied with energy by a heating current. The inverter unit is a unit that is intended to supply and / or generate a high frequency heating current, preferably with a frequency of 1 kHz minimum, preferably 10 kHz minimum and, advantageously, 20 kHz as minimum, to put the heating units into operation. The inverter unit has one or more inverter connection elements and, preferably, two or more inverter connection elements, which are arranged in a complete bridge topology or, preferably, in a half bridge topology. The inverter connection elements may be made as any connection element, preferably semiconductor connection element, that is appropriate to a person skilled in the art, for example,
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    as a transistor, preferably FET (field-effect transistor), as MOSFET (metal-oxide-semiconductor field-effect transistor) and / or as IGBT (Insulated Gate Bipolar Transistor), preferably as RC-IGBT (Reverse Conducting Insulated Gate Bipolar Transistor) . At least one diode can be connected in parallel to the inverter connection elements, in particular, a return diode, and / or at least one capacity, in particular, an attenuating capacity. The detection unit is preferably an electrical and / or electronic unit, which is intended to capture, in particular, detect and / or measure, one or more electrical signals. Specifically, the detection unit is intended to detect a smooth switching process of one or more inverter connection elements of the inverter unit by means of a flank, in particular, of a flank of an over-oscillation behavior, of a signal electric In addition, the detection unit captures a smooth disconnection process of one or more of the inverter connection elements, in particular, of exactly one inverter connection element. The detection unit is connected in parallel to at least one inverter connection element of the inverter unit, and has a high pass filter that is intended to attenuate the low frequency fractions of the electrical signal. In particular, the high-pass filter attenuates a low-frequency mains voltage of a rush, namely, an alternating voltage between 10 Hz and 100 Hz, preferably between 30 Hz and 80 Hz and, more preferably, between 40 Hz and 60 Hz. The high pass filter has at least one capacity and at least one resistor. The capacity and the resistor are connected in series. The high pass filter may have an inductor. The detection unit has at least one differentiator and, preferably, the high pass filter is intended to serve as a differentiator, which is intended to generate a derivation of an electrical signal. The detection unit is electrically and / or electronically connected to a control unit of the cooking appliance device. The term "switching process" includes the concept of the change between the conductive and non-conductive states of the inverter unit, preferably of the inverter connection element. The term "disconnection process" refers to the change from the conductive state to the non-conductive state . The term "connection process" refers to the change from the non-conductive state to the conductive state. The control unit is an electrical and / or electronic unit that preferably is integrated, at least partially, in a control unit and / or regulator of the cooking appliance device, and which is intended to direct and / or regulate at least the inverter unit, in particular, one or more inverter connection elements of the inverter unit. Preferably, the control unit comprises a calculation unit and, in addition to the calculation unit, a storage unit with a control and / or regulation program stored therein, which is intended to be executed by the calculation unit. The term "flank" is refers to the
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    time-dependent evolution of an electrical signal, preferably, of a current and / or of a voltage, where, starting from a first value before a switching process, the signal approaches at least essentially abruptly to a second value after a switching process of at least one inverter connection element of the inverter unit, The term "over-oscillation behavior" includes the concept of the time-dependent evolution of an electrical signal, preferably oscillating, preferably, of a current and / or a voltage, where, starting from a first value before a switching process, the signal approaches at least essentially abruptly to a second value after a switching process of at least one inverter connection element of the inverter unit, in particular, is above and / or below the second value approaching this after the switching process. Ilation if a parasitic capacity and / or a parasitic inductance of a circuit are excited by the at least essentially abrupt modification of a signal. Preferably, there is at least essentially an abrupt modification of a signal and / or an excitation of a parasitic inductance if a short circuit occurs between two inverter connection elements. The expression "at least essentially abruptly" means that the time of a flank of the signal, in particular, of the transition from the first value before the switching process to the second value after the switching process, amounts to a maximum of 20 %, preferably, at most 10%, more preferably, at most 5% and, even more preferably, at most 1% of the duration of a period of the heating current of the inverter unit. first value before the switching process and the second value after the switching process differ as a minimum by a factor 2, preferably as a minimum by a factor 5 and, more preferably, as a minimum by a factor 10. The value of the signal of an over-oscillation behavior converges in an attenuated oscillation towards the second value after the switching process, in particular, in the case of oscillations, in a case it starts aperiodic and / or in case of leakage. The term "switching process n soft ”, also known by its English name“ soft-switching ”, refers to a particularly careful switching process for the inverter unit, in particular, for an inverter connection element of the inverter unit, where a loss occurs by minimum switching. A switching loss will be minimal if, directly before and / or at the time of the switching process, a power produced in the inverter unit, preferably in the inverter connection element, is approximately zero.
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    By means of a corresponding embodiment, it is possible to provide a more efficient generic cooking appliance device, in particular, in terms of cost efficiency, efficiency relative to components and / or power efficiency, where operability it can be advantageously improved on the basis of the values detected by the detection unit by adapting at least the inverter unit and / or an inverter connection element of the inverter unit. Since, through smooth switching processes, energy loss and heating and overheating coupled with the electrical components, in particular semiconductor components, for example of the inverter unit and / or inverter connection elements, are avoided, safe and economical operation of the cooking appliance device can be guaranteed.
    In a preferred embodiment of the invention, it is proposed that the detection unit be provided to detect a switching process largely or completely without tension of the inverter unit by means of a flank, in particular, of a flank of an over-oscillation behavior of an electrical signal. A smooth switching process exhibits a loss of power. Infimates whether the switching process is a switching process largely or completely without current and / or, preferably, largely or completely without voltage. The expression "switching process largely or completely without current", also known by its English name "zero current switching, ZCS", includes the concept of a smooth switching process in which the current flowing in the inverter unit , specifically, in the inverter connection element, directly before a switching process, in particular, a switching process in which a conductive connection is established, and / or, preferably, at the time of a process of switching, in particular, of a switching process in which a conductive connection is established, whether approximately or exactly infamous, in particular, approximately zero.The expression "switching process largely or completely without voltage", also known by its English denomination "zero voltage switching, ZVS", it includes the concept of a smooth switching process in which the voltage that is applied and / or that falls in the inverter unit, specifically, in the inverter connection element, directly before a switching process, in particular, a switching process in which a conductive connection is established, and / or, preferably, at the time of a process of switching, in particular, of a switching process in which a conductive connection is established, whether approximate or exactly infamous, in particular,
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    approximately zero In this way, it is possible to detect a smooth switching process advantageously with little complexity.
    In a particularly preferred embodiment of the invention, it is proposed that the flank of the electrical signal be the flank of the voltage that originates in the inverter unit during at least one switching process. The over-oscillation behavior is a tension over-oscillation behavior. The voltage that originates is a voltage that is applied and / or descends on an inverter connection element of the inverter unit directly before closing or directly after opening the inverter connection element. By means of the flank of the over-oscillation behavior, the deviation with respect to a smooth switching process can be advantageously advantageously deduced.
    In addition, it is proposed that the detection unit be provided to detect at least one modification of the edge of the voltage over-oscillation behavior that originates in the inverter unit during at least one switching process. The detection unit has an impulse detection unit, which is intended to recognize and / or detect a modification of the flank. The pulse detection unit has one or more diodes, preferably, exactly one diode, at least one resistor, in particular, a measurement resistor, and at least one capacity, in particular, a detection capacity. The resistor and capacity are connected in parallel. Preferably, the detection unit is composed of the high pass filter and the pulse detection unit. The term "flank modification" includes the concept of a slope modification during, preferably after, a switching process. The detection unit is intended to detect a slope modification by generating a derivation of an applied voltage and recognizing the slope maximum by means of the pulse detection unit By capturing the modification of the flank, a control fact can be detected with great precision and advantageously with little complexity with which it can be qualitatively verified if a smooth switching process occurs. therefore, it is possible to recognize and, above all, avoid, a process of hard switching inefficiently energy efficient.
    Likewise, it is proposed that the detection unit be provided to generate at least one output signal dependent on the maximum slope of the flank. The output signal is here proportional to the maximum slope due to its magnitude of the flank. The output signal is preferably directly connected to the control unit through the electrical and / or electronic connection. The output signal is intended to be used for
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    control and / or regulate the inverter unit and / or the inverter connection element. Preferably, the output signal of the detection unit is a continuous voltage that always has the same sign. The output signal can be a signal that changes over time, for example, exponentially. Particularly preferably, the output signal is approximate or totally constant. The expression "approximate or totally constant signal" includes the concept of a signal that in its temporal evolution differs from a reference value in the maximum 15%, preferably in the maximum 10% and, more preferably, in the 5% maximum, through the detection of the maximum slope of the flank and the generation of a proportional output signal, it is possible to quantify the deviation of a switching process with respect to a smooth switching process. The output signal can be used to analyze the switching process and / or to adapt the switching process and, in particular, it can be used directly for the activation of a logic circuit.
    Preferably, the control unit is intended to vary at least one operating parameter, in particular, the duration of a period, the switching frequency, the duration of the pulse, the distance between pulses, the duty cycle and / or the dead time of the inverter unit and / or of an inverter connection element of the inverter unit, depending on the output signal in order to achieve a smoother switching process. The pulse duration is a time interval in which an inverter connection element is connected and disconnected again. The term "pulse distance" includes the concept of the time interval between two connection processes of two inverter connection elements. The term "service cycle" includes the concept of the relationship between the pulse duration and the duration of a period. The term "dead time" includes the concept of the time interval between a disconnection process of a first inverter connection element of the inverter unit and a connection process of a second inverter connection element of the inverter unit. expression "smoother switching process" includes the concept of a switching process in which the power, current and / or, preferably, the voltage directly before and / or at the time of the switching process are of lesser magnitude than during a reference switching process. By emitting the output signal, the inverter unit and / or the inverter connection element can be directed and / or regulated, thereby achieving a smoother switching process. Likewise, operation of the energy-efficient cooking appliance device is ensured, and it can be prevented at the same time that the electrical and / or electronic components overheat.
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    In addition, it is proposed that the inverter unit comprises a variable attenuator network, and that the control unit is provided to vary at least the capacity of the attenuator network depending on the output signal. The attenuator network is arranged and / or connected in parallel to the inverter connection elements. The attenuator network comprises at least one adjustable capacitor and, preferably, several capacitors that are interconnectable by at least one attenuator connection element and, preferably, by various attenuator connection elements. The attenuator connection elements may be made as any connection element, preferably semiconductor connection element, that is appropriate to a person skilled in the art, for example, as a transistor, preferably FET, as MOSFET and / or as IGBT, in particular, as RC-IGBT. The symmetric attenuation of several inverter switches is guaranteed as the attenuator connection elements are configured to simultaneously and symmetrically modify the capacities of the attenuator network. The total capacity is adjustable depending on the output signal of the detection unit and / or preferably, by means of the control unit, where the attenuation constant is gradually adjustable. If it is not desired, it is not possible and / or the adaptation of the switching frequency, the duration of the period, the duration of the pulse, the distance between impulses, the service cycle and / is already optimized. or of the dead time, through the attenuating network, various possible values of the capacities can be varied in order to achieve a smooth switching process. Also, the attenuator network can be used additionally to adapt the switching state with greater accuracy, and the energy efficiency of the switching process can be increased again.
    In one embodiment of the invention, the detection unit has at least one diode. The diode serves to control the current through its intrinsic, voltage-dependent resistance, whose progression preferably differs from a linear progression. The value of the intrinsic resistance, in particular, the slope of the characteristic current-voltage curve, is positive, in particular, greater than zero. The detection unit is configured to detect the maximum value of the pulse using the diode, preferably, a Zener diode. The diode directs the current inside the detection unit, so that no additional electrical or electronic components directed by the current and / or voltage have to be used. In this way, the complexity of the detection unit can be advantageously kept low.
    It is also proposed that the detection unit does not present transistors. Apart from
    diode, the detection unit has no other electrical and / or electronic components
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    assets. The term "active component" includes the concept of a component that has an amplification effect and / or that carries out the control of current and / or voltage. The active components have a nonlinear intrinsic resistance, whose slope of the characteristic current-voltage curve is negative, preferably, less than zero, at least in sections. The active components can be electronic tubes, diodes, triodes, semiconductor components, transistors, thyristors, photosemiconductors, piezosemiconductors, integrated circuits, potential amplifiers and / or comparators, as well as combinations of these. The term "passive component" includes the concept of a component that does not have an amplification effect. Passive components have a linear resistance, whose slope of the characteristic current-voltage curve is positive, in particular, greater than zero. Passive components can be resistors, capacitors and inductors. Thus, an economic detection unit can be provided, since, apart from the diode, other expensive active components, for example, transistors, can be advantageously dispensed with. By not having to supply power to additional active components such as potential amplifiers, the current consumption of the detection unit itself can be kept low.
    The invention also refers to a method for putting into operation a cooking appliance device, in particular an induction cooking device, with at least one inverter unit through which a current of heating, where a smooth switching process of the inverter unit is detected by the detection unit by means of at least one flank of an electrical signal, in particular, of an over-oscillation behavior. In this way, a safe monitoring of the switching process of the inverter unit and, preferably, of the inverter connection element can be carried out. Based on the measurement, other steps could be initiated for the regulation and / or control of the cooking appliance device.
    Other advantages are taken from the following description of the drawing. Examples of realization of the invention are represented in the drawing. The drawing, description and claims contain numerous features in combination. The person skilled in the art will consider the characteristics advantageously also separately, and will gather them in other reasonable combinations.
    They show:
    Fig. 1 an induction cooking field with a device device
    cooking, in schematic top view,
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    Fig. 2 a wiring diagram of a part of the device device
    cooking,
    Fig. 3 a connection diagram of a device detection unit
    of cooking appliance,
    Fig. 4 a graph of the typical evolution of the signal with a time of
    switching too extensive,
    Fig. 5 a graph of the typical evolution of the signal with a time of
    optimal switching,
    Fig. 6 a graph of the typical evolution of the signal with a time of
    switching too short,
    Fig. 7 a graph of the typical evolution of the signal with a time of
    even shorter commutation, and
    Fig. 8 a wiring diagram of a part of another device device
    of cooking with an attenuating net.
    Figure 1 shows a top view of a cooking field 20a made as an induction cooking field. The cooking field 20a has four heating zones 24a, 25a, 26a, 27a, and a cooking field plate 22a. The heating zones 24a, 25a, 26a, 27a are marked on the cooking field plate 22a, and each one is provided to heat a cooking drum element 28a, 30a placed on the cooking field plate 22a. The cooking field 20a has a control unit 32a, which serves for the user to enter and / or select different parameters, for example, the degree of power for one of the heating zones 24a, 25a, 26a, 27a. The cooking field 20a comprises a cooking device device, which comprises for controlling and regulating a control unit 14a, which serves to direct the heating power of the respective heating zones 24a, 25a, 26a, 27a .
    Figure 2 shows a wiring diagram of a part of the cooking appliance device. The cooking appliance device comprises a continuous tension unit 36a with a rectifier (not shown), which in a known manner is intended to supply a rectified voltage. In addition, the cooking appliance device has an inverter unit 10a, which is intended to supply a high frequency heating current. In the present case, the inverter unit 10a comprises two inverter connection elements 44a, 46a, which are arranged in a half bridge topology. It is also conceived that an inverter unit alternatively presents other inverter connection elements that are arranged in a topology.
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    of complete bridge. In the present case, the inverter connection elements 44a, 46a are made as RC-IGBTs. To each inverter connection element 44a, 46a, a return diode 48a, 50a and an attenuating capacity 52a, 54a are connected in parallel. As an alternative, it is also conceived to dispense with a return diode and / or an attenuating capacity connected in parallel to an inverter connection element. To generate the heating current, the inverter connection elements 44a, 46a are connected and disconnected alternately. The control unit 14a is intended to direct the inverter unit 10a through control lines not shown here and / or to make adaptations, in particular, it is intended to adapt the switching frequency, the duration of a period, the duration of the pulse, the distance between pulses, the duty cycle and / or the dead time of the inverter unit 10a, in particular, of the inverter connection elements 44a, 46a.
    The inverter unit 10a has a first terminal 56a, a second terminal 58a, and a central socket 60a. The first terminal of the first inverter connection element 44a is electrically connected with the first terminal 56a, and the second terminal of the first inverter connection element 44a is electrically connected with the central socket 60a. The first terminal of the second inverter connection element 46a is electrically connected with the central socket 60a, and the second terminal of the second inverter connection element 46a is electrically connected with the second terminal 58a. The first terminal 56a is connected to the first terminal of the continuous voltage unit 36a, and the second terminal 58a is connected to the second terminal of the continuous voltage unit 36a.
    In the present case, the cooking appliance device has one of the circuits shown in Figure 2 for each of the heating zones 24a, 25a, 26a, 27a. Here, a heating element 66a is assigned to each of the heating zones 24a, 25a, 26a, 27a. In the present case, the heating element 66a is assigned to the heating zone 24a (see Figure 1). The heating element 66a is made as an inductor. The cooking appliance device comprises a resonant capacity 68a, which is realized as a condenser. The heating element 66a is connected to the first terminal with the central socket 60a. The second terminal of the heating element 66a is connected to the first terminal of the resonant capacity 68a, and the second terminal of the resonant capacity 68a is connected to the second terminal 58a. Alternatively, another resonant capacity could be provided that was arranged between the heating element 66a and the first terminal 56a.
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    Figure 3 shows a simplified wiring diagram of a detection unit 12a of the cooking appliance device. In this case, the detection unit 12a is electrically connected with the first terminal 56a and with the central socket 60a to determine the smooth switching process of the inverter connection element 46a. Alternatively or additionally, a connection is also conceived with the second terminal 58a and with the central socket 60a. The detection unit 12a has a high-pass filter 80a, and comprises a pulse detection unit 82a. Alternatively, the detection unit may be formed by a high pass filter and by a pulse detection unit.
    The first input terminal of the high pass filter 80a is electrically connected to the first terminal of an adjustment capacity 84a, which is made as a capacitor. The second terminal of the adjustment capacity 84a is electrically connected with the first output terminal of the high pass filter 80a, and with the first terminal of an adjustment resistor 86a. The second input terminal of the high pass filter 80a is electrically connected with the second terminal of the adjustment resistor 86a, and the second terminal of the adjustment resistor 86a is electrically connected with the second output terminal of the high pass filter 80a. The value of the adjustment capacity 84a is chosen so that it is much smaller, so that the capacities, the total attenuation capacity of the inverter unit 10a and the adjustment capacity 84a, differ by at least one factor 10. Alternatively, the values of the total capacity of the attenuator network and of the adjustment capacity can be differentiated by a factor of 50 and, advantageously, by a factor of 100.
    The first input terminal of the pulse detection unit 82a is electrically connected to the first terminal of a diode 18a. The diode 18a is electrically connected through its second terminal with the first terminal of a measuring resistor 88a, with the first terminal of a detection capacity 90a, and with the first output terminal of the pulse detection unit 82a. The second input terminal of the pulse detection unit 82a is connected with the second terminal of the measurement resistor 88a, with the second terminal of the detection capacity 90a, and with the second output terminal of the pulse detection unit 82a. The value of the capacity of the detection capacity 90a multiplied by the value of the resistance of the measurement resistor 88a is chosen such that it is less than the tenfold of the period duration of the oscillating heating current with a frequency of 1 kHz as minimum of the inverter unit 10a. The capacity value of the capacity of
    detection multiplied by the resistance value of the measurement resistor can
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    be chosen so that it is less than the tenfold of the period of duration of the oscillating heating current with a frequency of 10 kHz minimum, preferably, 20 kHz minimum, of the inverter unit.
    The input terminals of the high pass filter 80a serve to capture a voltage in the inverter unit 10a. The output terminals of the high pass filter 80a and the input terminals of the pulse detection unit 82a are electrically connected to each other. The first output terminal of the high pass filter 80a is electrically connected with the first input terminal of the pulse detection unit 82a, and the second output terminal of the high pass filter 80a is electrically connected with the second input terminal of the pulse detection unit 82a. The high pass filter 80a serves to attenuate the low frequency fractions of a captured voltage, for example, the fractions of a 50 Hz mains voltage that overlap the voltage. In order to mitigate other influences of the mains voltage, it is envisaged that a measurement will be made by the detection unit 12a during a zero crossing of the mains voltage. In addition, the adjustment capacity 84a generates a temporary derivation of the signal of the captured voltage. The pulse detection unit 82a serves to recognize a pulse from the derivation of the voltage taken. By means of the pulse detection unit 84a, an output signal is emitted through its output terminals whose initial value is proportional to the slope of the flank of the voltage taken. The output signal is a continuous voltage that decreases exponentially with time. By means of the measurement resistor 88a, through which the voltage of the output signal decreases, the pulse detection unit 82a can be returned to an initial state prior to the measurement.
    Figures 4, 5, 6 and 7 show in four different moments of an operation the effects of a variation of the switching times of the inverter unit 10a by means of the signal evolutions that occur with them. The ordinate axis 92a is represented in figures 4, 5, 6 and 7 as the y axis, and on the abscissa axis 94a time is represented each time. The first inverter connection element 44a is actuated through a control signal not shown. The first curve each time shows the temporal evolution of a control signal 98a of the second inverter connection element 46a, the second curve each time shows the temporal evolution of the heating current 100a flowing through the heating element 66a, the third curve shows each time the temporal evolution of the voltage 102a that decreases through the heating element 66a, which shows during each disconnection process of the first inverter connection element 44a a flank, which differ from each other in
    the pronunciation of the slope, and the fourth curve shows each time the temporal evolution
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    of the output signal 104a of the detection unit 12a. As a result of the brief time interval represented, the output signal is constant over time.
    On the axis of abscissa 94a the moment T0 is indicated in Figures 4, 5, 6 and 7, in which the detection unit 12a detects a slope of the tension flank 102a, as! as the moment T1 of a connection process of the second inverter connection element 46a. The time distance between the marked moment T0 and the moment T1 of the connection process of the second inverter connection element 46a, the intercalation of the flank of the signal of the control signal 98a, defines a time interval of the switching time td that It has to be optimized. Ideally, a connection process of the second inverter connection element 46a takes place when the voltage curve of the first inverter connection element 44a adopts the zero value. The time interval td is then Infimo.
    In a case represented in Figure 4, the time interval td is greater than an Infimo value, which results in a loss of efficiency, since the inverter unit 10a is switched less quickly than is really possible. The period duration is extended in the time interval td and the switching frequency of the heating current 100a is reduced through the time interval td. A smooth and tension-free switching process takes place here.
    In the case represented in Figure 5, the time interval td is Infimo. The period duration is minimal, the heating power that can be supplied through the inverter unit 10a is maximum and the switching losses are minimized. A smooth and tension-free switching process takes place here.
    In the case represented in Figure 6, the tension 102a has not yet dropped to a value
    Infimo after the disconnection process of the first inverter connection element 44a,
    before the second inverter connection element 46a is connected so
    conductive The two inverter connection elements 44a, 46a are shorted
    briefly, where the short circuit leads to the modification of the slope of the flank of
    the tension 102a. Detection unit 12a detects the modification of the slope of the
    tension 102a. The output signal 104a of the detection unit 12a rises so
    proportional to the detected modification of the slope of the flank. The value of the signal of
    output 104a of figure 6 is increased by the abrupt variation value 106a by
    comparison with the output signal 104a of reference of figures 4 and 5 of a process of
    smooth switching In the case represented in Figure 7, the two connection elements
    inverter 44a, 46a are short-circuited for longer than in figure 6. The value
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    of the output signal 104a of Figure 7 is increased in the value of abrupt variation 108a compared to the value of the output signal 104a of Figures 4 and 5.
    In Figure 8, another example of realization of the invention is shown. The following descriptions are essentially limited to the differences between the examples of realization, where, in relation to components named in the same way, in particular, in relation to components with the same reference symbols, it can also be basically referred to the drawing and / or the description of the embodiment example of figures 1 to 7. For the differentiation of the embodiment examples, the letter "a" has been postponed to the reference symbols of the embodiment example of figures 1 to 7 and, in the example of embodiment of Figure 8, has been replaced by the letter "b".
    The other embodiment of Figure 8 differs basically from the previous embodiment in an attenuator network 16b. In addition, the exemplary embodiment differs in that several heating elements 66b connected in parallel are provided.
    The circuit is made analogously to the embodiment of Figure 2. In the present case, the cooking device has n heating elements 66b, which are connected to each other in parallel. Likewise, it is conceived that the heating units are connected in series. In addition to the n heating elements 66b, the cooking device has n power connection elements 70b. Each heating element 66b is connected in series with a power connection element 70b. The power connection element 70b can be made here as any connection element, preferably semiconductor connection element, that is appropriate to a person skilled in the art, for example, as a transistor, preferably as FET, as MOSFET and / or as IGBT, preferably as RC-IGBT. In the present case, the power connection element 70b is made as RC-IGBT. The n power connection elements 70b are connected by a first terminal with the central socket 60b. The n heating elements 66b are connected to a second terminal with the first terminal of a resonant capacity 68b, which is connected each time through the second terminal with the first terminal 56b and with the second terminal 58b of the inverter unit 10b. The n heating elements 66b form a matrix cooking field. Here, any amount of n heating elements 66b can form a heating zone 24b, 25b, 26b, 27b.
    In the present embodiment, the inverter unit 10b additionally comprises
    an attenuating network 16b. The first terminal of the attenuator network 16b is connected to
    fifteen
    a continuous voltage unit 36b and with the first terminal 56b. The second terminal of the attenuator network 16b is connected to the central socket 60b. The third terminal of the attenuator network 16b is connected with the second terminal of the continuous voltage unit 36b and with the second terminal 58b. The attenuator network 16b comprises a quantity of m 5 attenuating capacities 52b, 54b, which are identical to each other. Each attenuating capacity 52b is connected in series with an attenuating capacity 54b. The m attenuator capacities 52b are connected in parallel to each other by m attenuator connection elements 78b, and the m attenuator capacities 54b are connected in parallel to each other by m attenuator connection elements 78b. The attenuator connection element 10 78b is made here like any connection element, preferably
    semiconductor connection, which is appropriate to a person skilled in the art, for example, as a transistor, preferably as FET, as MOSFET and / or as IGBT, preferably as RC-IGBT. In the present case, the attenuator connection element 78b is made as RC-IGBT. The first terminal of the attenuator capacity 52b is electrically connected to the first terminal of the attenuator network 16b, the second terminal of the attenuator capacity 52b is connected to the first terminal of the attenuator capacity 54b, and the second terminal of the attenuator capacity 54b is connected to the third terminal of the attenuator network 16b.
    The attenuator connection element 78b forms a means to modify the attenuation constant of the attenuator network 16b. The 2m attenuator capacities 52b, 54b and the m attenuator connection elements 78b together form the freely configurable attenuator network 16b.
    The control unit 14b can direct the inverter unit 10b, or the attenuator network 16b, through a control line not shown here, and adapt it based on a measurement of the detection unit 12b. In addition, the control unit 14b can modify the total capacity of the inverter unit 10b, or, of the attenuator network 16b.
    10
    12
    14
    16
    18
    twenty
    22
    24
    25
    26
    27
    28
    30
    32
    36
    44
    46
    48
    fifty
    52
    54
    56
    58
    60
    66
    68
    70
    78
    80
    82
    84
    86
    88
    90
    Reference symbols
    Inverter unit Detection unit Control unit Dimmer network Diode
    Cooking field
    Cooking Field Plate
    Heating zone
    Heating zone
    Heating zone
    Heating zone
    Cooking Battery Element
    Cooking Battery Element
    Control unit
    Continuous tension unit
    Inverter connection element
    Inverter connection element
    Return diode
    Return diode
    Attenuating capacity
    Attenuating capacity
    First terminal
    Second terminal
    Central socket
    Heating element
    Resonant capacity
    Power connection element
    Dimmer connection element
    High pass filter
    Pulse Detection Unit
    Adjustment capacity
    Adjustment resistor
    Measuring Resistor
    Detection capacity
    92
    94
    98
    100
    102
    104
    106
    108
    T0
    T1
    td
    Edge of ordered
    Abscissa shaft
    Control signal
    Heating current
    Tension
    Exit sign
    Sudden Variation Value
    Sudden Variation Value
    Moment
    Moment
    Switching time
    权利要求:
    Claims (9)
    [1]
    5
    10
    fifteen
    twenty
    25
    30
    35
    1. Induction cooking device with an inverting unit (10a; 10b) that is intended to generate a heating current, characterized by a detection unit (12a; 12b) that is intended to detect a smooth switching process of the inverter unit (10a; 10b) by means of at least one flank of a voltage signal that originates from the inverter unit (10a; 10b) during the switching process.
    [2]
    2. Cooking device device according to claim 1, characterized in that the detection unit (12a; 12b) is provided to detect a switching process without tension of the inverter unit (10a; 10b) by means of the flank of the signal of the voltage that originates in the inverter unit (10a; 10b) during the switching process.
    [3]
    3. Cooking device device according to one of the preceding claims, characterized in that the detection unit (12a; 12b) is intended to detect at least one modification of the flank during at least one switching process.
    [4]
    4. Cooking appliance device according to one of the preceding claims, characterized in that the detection unit (12a; 12b) is provided to detect the maximum slope of the flank.
    [5]
    5. Cooking appliance device according to claim 4, characterized in that the detection unit (12a; 12b) is provided to generate at least one output signal dependent on the maximum slope of the flank.
    [6]
    6. Cooking appliance device according to claim 5, characterized by a control unit (14a; 14b) which is intended to vary at least one parameter of the operation of the inverter unit (10a; 10b), between the duration of a period, the switching frequency, the pulse duration, the distance between pulses, the service cycle and / or the dead time, depending on the output signal in order to achieve a smoother switching process.
    [7]
    7. Cooking appliance device according to claim 6, characterized in that an inverter unit (10b) comprises a variable attenuator network (16b), and the control unit (14b) is provided to vary at least the capacity of the attenuator network ( 16b) depending on the output signal.
    5
    [8]
    8. Cooking device device according to one of the preceding claims, characterized in that the detection unit (12a; 12b) has at least one diode (18a; 18b).
    10
    [9]
    9. Induction cooking appliance, with at least one cooking appliance device according to one of the claims set forth above.
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    同族专利:
    公开号 | 公开日
    DE102016202775A1|2016-09-22|
    ES2583206B1|2017-07-18|
    ES2583206R1|2016-10-13|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    JPS5820226B2|1976-01-14|1983-04-22|Matsushita Electric Ind Co Ltd|
    JPS6120995B2|1977-09-20|1986-05-24|Matsushita Electric Ind Co Ltd|
    US5166549A|1991-08-07|1992-11-24|General Electric Company|Zero-voltage crossing detector for soft-switching devices|
    JP2005222728A|2004-02-03|2005-08-18|Toshiba Home Technology Corp|Control unit|ES2673100B1|2016-12-13|2019-03-28|Bsh Electrodomesticos Espana Sa|Cooking appliance device and method for putting into operation a cooking appliance device|
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    ES201530356A|ES2583206B1|2015-03-18|2015-03-18|INDUCTION COOKING DEVICE DEVICE WITH AN INVESTING UNIT AND COOKING DEVICE WITH SUCH DEVICE|ES201530356A| ES2583206B1|2015-03-18|2015-03-18|INDUCTION COOKING DEVICE DEVICE WITH AN INVESTING UNIT AND COOKING DEVICE WITH SUCH DEVICE|
    DE102016202775.1A| DE102016202775A1|2015-03-18|2016-02-23|Gargerätevorrichtung and method for operating a Gargerätevorrichtung|
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