WO2019220484A1 - Dispositif de commande pour machine électrique rotative à courant alternatif - Google Patents

Dispositif de commande pour machine électrique rotative à courant alternatif Download PDF

Info

Publication number
WO2019220484A1
WO2019220484A1 PCT/JP2018/018487 JP2018018487W WO2019220484A1 WO 2019220484 A1 WO2019220484 A1 WO 2019220484A1 JP 2018018487 W JP2018018487 W JP 2018018487W WO 2019220484 A1 WO2019220484 A1 WO 2019220484A1
Authority
WO
WIPO (PCT)
Prior art keywords
current
winding
control
determination
voltage
Prior art date
Application number
PCT/JP2018/018487
Other languages
English (en)
Japanese (ja)
Inventor
信吾 原田
圭一 榎木
望 上岡
良雅 西島
良輔 重松
大塚　和彦
Original Assignee
三菱電機株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 三菱電機株式会社 filed Critical 三菱電機株式会社
Priority to PCT/JP2018/018487 priority Critical patent/WO2019220484A1/fr
Publication of WO2019220484A1 publication Critical patent/WO2019220484A1/fr

Links

Images

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P27/00—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage
    • H02P27/04—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage
    • H02P27/06—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters

Definitions

  • the present disclosure relates to a control device for an AC rotating electrical machine that controls an AC rotating electrical machine having a stator having n-phase (n is a natural number of 2 or more) windings and a rotor having a permanent magnet.
  • an electric vehicle such as an electric vehicle or a hybrid vehicle is equipped with an AC rotating electric machine as a wheel drive source.
  • the inverter connected to the AC rotating machine includes a first power conversion function for converting DC power from a DC power source into AC power supplied to the AC rotating machine, and AC power generated by the AC rotating machine is converted to DC. And a second power conversion function for converting into direct current power for charging the power source.
  • the inverter is provided with a power conversion circuit configured by a switching element such as a MOSFET (Metal-Oxide-Semiconductor-Field-Effect-Transistor).
  • MOSFET Metal-Oxide-Semiconductor-Field-Effect-Transistor
  • a voltage suppression device that suppresses the voltage applied to the switching element provided in the inverter so as not to exceed the breakdown voltage of the switching element. Is provided.
  • the winding current fluctuates transiently until it reaches a steady state.
  • the d-axis current may temporarily increase significantly in the negative direction.
  • the component of the rotating magnetic field of the three-phase winding that acts in the direction of weakening the magnetic flux of the permanent magnet increases.
  • the d-axis current increases in the negative direction from the predetermined value and the weakening magnetic field component becomes larger than the predetermined value, irreversible demagnetization occurs in the permanent magnet, which may reduce the driving capability of the AC rotating electric machine. Therefore, in order to suppress the occurrence of irreversible demagnetization of the permanent magnet, it is necessary to suppress the d-axis current from increasing in a negative direction from a predetermined value after starting the winding short-circuit control.
  • a control device for an AC rotating electrical machine that can suppress the occurrence of irreversible demagnetization of a permanent magnet due to the d-axis current increasing in the negative direction after starting a short-circuiting control for short-circuiting a plurality of windings is desired. It is.
  • An AC rotating electrical machine control apparatus controls an AC rotating electrical machine that controls an AC rotating electrical machine having a stator having n-phase (n is a natural number of 2 or more) windings and a rotor having a permanent magnet.
  • a device, A switching element on the positive electrode side connected to the positive electrode side of the DC power supply and a switching element on the negative electrode side connected to the negative electrode side of the DC power supply are connected in series, and the connection point of the series connection is connected to the winding of the corresponding phase.
  • An inverter in which n sets of series circuits to be connected are provided corresponding to each of the n phases;
  • a smoothing capacitor connected between a positive electrode side and a negative electrode side of the inverter;
  • a voltage detection unit for detecting a voltage between terminals of the smoothing capacitor;
  • a current detector for detecting a winding current flowing in the n-phase winding;
  • a switching control unit for controlling on / off of the switching element,
  • the switching controller is It is determined whether or not it is a winding short-circuit mode in which the n-phase windings are short-circuited to each other, When it is determined that the winding short circuit mode, When the inter-terminal voltage is lower than the preset first determination voltage and the absolute value of the current based on the winding current exceeds the preset determination current, all of the positive side and the negative side Start all-phase open control to turn off the switching element, When the inter-terminal voltage exceeds a second determination voltage preset to a value equal to or higher than
  • the control device for an AC rotating electrical machine it is determined that the winding short-circuit mode is set, the voltage between the terminals is lower than the first determination voltage, and the absolute value of the current is the determination current. If the switching is switched from the winding short-circuit control to the all-phase open control and all the switching elements are turned off, the return of the winding current between the phases stops, and the absolute value of the winding current decreases. Therefore, an increase in the negative direction of the d-axis current is suppressed, and the occurrence of irreversible demagnetization of the permanent magnet can be suppressed.
  • switching between the winding short-circuit control and the all-phase open control according to the above judgment condition suppresses the increase in d-axis current in the negative direction by switching to the all-phase open control. And it can suppress that the irreversible demagnetization of a permanent magnet generate
  • FIG. 2 is a schematic configuration diagram of an AC rotating electrical machine and a control device for the AC rotating electrical machine according to Embodiment 1.
  • FIG. 2 is a schematic block diagram of a controller according to Embodiment 1.
  • FIG. 2 is a hardware configuration diagram of a controller according to Embodiment 1.
  • FIG. It is a time chart explaining the control behavior concerning a comparative example. It is a figure explaining the behavior of the dq axis current concerning a comparative example.
  • 4 is a flowchart for explaining processing of a switching control unit according to the first embodiment.
  • 3 is a time chart for explaining a control behavior according to the first embodiment. It is a figure explaining the behavior of the dq axis current concerning Embodiment 1.
  • FIG. 10 is a flowchart for explaining processing of a switching control unit according to the second embodiment.
  • FIG. 1 is a schematic configuration diagram of an AC rotating electrical machine 2 and a control device 1 according to the present embodiment.
  • AC rotary electric machine 2 is a permanent magnet synchronous AC rotary electric machine having a stator provided with n-phase (n is a natural number of 2 or more) windings and a rotor provided with permanent magnets.
  • n 3
  • the three phases are the U phase, the V phase, and the W phase.
  • the stator is provided with three-phase windings Cu, Cv, and Cw.
  • the three-phase windings Cu, Cv, Cw are star-connected.
  • the three-phase winding may be a delta connection.
  • the AC rotating electrical machine 2 includes a rotation sensor 16 that outputs an electrical signal corresponding to the rotation angle of the rotor.
  • the rotation sensor 16 is a Hall element, an encoder, a resolver, or the like. An output signal of the rotation sensor 16 is input to the controller 30.
  • the control device 1 includes an inverter 20, a power switch 11, a smoothing capacitor 12, a voltage sensor 13, a current sensor 17, and a controller 30.
  • the inverter 20 has a plurality of switching elements and performs DC / AC conversion between the DC power supply 10 and the three-phase winding.
  • a positive side switching element 23 ⁇ / b> H (upper arm) connected to the positive side of the DC power source 10 and a negative side switching element 23 ⁇ / b> L (lower arm) connected to the negative side of the DC power source 10 are connected in series.
  • Three sets of series circuits (legs) corresponding to the windings of the three phases are provided.
  • the inverter 20 includes a total of six switching elements including three positive-side switching elements 23H and three negative-side switching elements 23L. A connection point where the positive-side switching element 23H and the negative-side switching element 23L are connected in series is connected to the winding of the corresponding phase.
  • the collector terminal of the positive side switching element 23H is connected to the positive side electric wire 14, and the emitter terminal of the positive side switching element 23H is the collector of the negative side switching element 23L.
  • the emitter terminal of the negative side switching element 23 ⁇ / b> L is connected to the negative side electric wire 15.
  • the connection point between the positive-side switching element 23H and the negative-side switching element 23L is connected to the corresponding phase winding.
  • an IGBT Insulated Gate Bipolar Transistor
  • MOSFET Metal Oxide Semiconductor Semiconductor Field Effect Transistor
  • the power switch 11 turns on / off the connection between the DC power source and the inverter 20.
  • the power switch 11 is provided on an electric wire that connects the positive electrode side of the DC power supply 10 and the positive electrode side of the inverter 20.
  • the power switch 11 is a relay circuit or a switching element, and is on / off controlled by the controller 30. In the present embodiment, the power switch 11 is basically turned on.
  • the smoothing capacitor 12 is connected between the positive electrode side and the negative electrode side of the inverter 20.
  • the smoothing capacitor 12 is provided closer to the inverter 20 than the power switch 11.
  • the voltage sensor 13 outputs an electrical signal corresponding to the voltage between the terminals of the smoothing capacitor 12.
  • the voltage sensor 13 is connected to a positive terminal and a negative terminal of the smoothing capacitor 12.
  • An output signal from the voltage sensor 13 is input to the controller 30.
  • the current sensor 17 outputs an electric signal corresponding to the current flowing through the winding of each phase.
  • the current sensor 17 is provided on the electric wire of each phase that connects the series circuit of the switching element and the winding. An output signal of the current sensor 17 is input to the controller 30.
  • the DC power supply 10 uses a chargeable / dischargeable power storage device (for example, a lithium ion battery, a nickel metal hydride battery, or an electric double layer capacitor). Note that the DC power supply 10 may be provided with a DC-DC converter that is a DC power converter that boosts or lowers the DC voltage.
  • a chargeable / dischargeable power storage device for example, a lithium ion battery, a nickel metal hydride battery, or an electric double layer capacitor.
  • the DC power supply 10 may be provided with a DC-DC converter that is a DC power converter that boosts or lowers the DC voltage.
  • the controller 30 controls the AC rotating electric machine 2 by controlling the inverter 20.
  • the controller 30 includes a switching control unit 31, a voltage detection unit 32, a current detection unit 33, and a rotation information detection unit 34, which will be described later.
  • Each function of the controller 30 is realized by a processing circuit provided in the controller 30. Specifically, as shown in FIG.
  • the controller 30 includes, as processing circuits, an arithmetic processing device 90 (computer) such as a CPU (Central Processing Unit), a storage device 91 that exchanges data with the arithmetic processing device 90, An input circuit 92 for inputting an external signal to the arithmetic processing unit 90 and an output circuit 93 for outputting a signal from the arithmetic processing unit 90 to the outside are provided.
  • an arithmetic processing device 90 such as a CPU (Central Processing Unit)
  • CPU Central Processing Unit
  • the arithmetic processing unit 90 includes an ASIC (Application Specific Integrated Circuit), an IC (Integrated Circuit), a DSP (Digital Signal Processor), an FPGA (Field Programmable Gate Array), various logic circuits, and various signal processing circuits. May be. Moreover, as the arithmetic processing unit 90, a plurality of the same type or different types may be provided, and each process may be shared and executed.
  • the storage device 91 includes a RAM (Random Access Memory) configured to be able to read and write data from the arithmetic processing unit 90, a ROM (Read Only Memory) configured to be able to read data from the arithmetic processing unit 90, and the like. It has been.
  • the input circuit 92 is connected to various sensors such as the voltage sensor 13, the current sensor 17, and the rotation sensor 16, and switches, and includes an A / D converter that inputs the output signals of these sensors and switches to the arithmetic processing unit 90. ing.
  • the output circuit 93 includes a gate drive circuit that drives the switching element on and off, and an electrical load such as the power switch 11 and the like, and a drive circuit that outputs a control signal from the arithmetic processing unit 90 to these electrical loads.
  • control units 31 to 34 in FIG. 2 provided in the controller 30 are such that the arithmetic processing unit 90 executes software (programs) stored in a storage device 91 such as a ROM, and the storage device 91, This is realized by cooperating with other hardware of the controller 30 such as the input circuit 92 and the output circuit 93. It should be noted that setting data such as determination values used by the control units 31 to 34 and the like are stored in a storage device 91 such as a ROM as part of software (program). Hereinafter, each function of the controller 30 will be described in detail.
  • Each detection unit The voltage detection unit 32 detects the inter-terminal voltage VDC of the smoothing capacitor 12. In the present embodiment, the voltage detection unit 32 detects the inter-terminal voltage VDC based on the output signal of the voltage sensor 13.
  • the inter-terminal voltage VDC is a DC voltage between the positive electrode side wire 14 and the negative electrode side wire 15 of the inverter 20.
  • the current detector 33 detects winding currents Iu, Iv, and Iw flowing through the three-phase windings.
  • the current detection unit 33 detects the winding currents Iu, Iv, and Iw flowing from the inverter 20 to the windings Cu, Cv, and Cw of each phase based on the output signal of the current sensor 17.
  • the rotation information detection unit 34 detects the rotation angle ⁇ (magnetic pole position) and the rotation angular velocity of the rotor. In the present embodiment, the rotation information detection unit 34 detects the rotation angle ⁇ (magnetic pole position) and the rotation angular velocity of the rotor based on the output signal of the rotation sensor 16.
  • the switching control unit 31 performs on / off control of each switching element included in the inverter 20.
  • the switching control unit 31 includes a control mode determination unit 311, a normal mode control unit 312, and a winding short-circuit mode control unit 313.
  • the control mode determination unit 311 determines whether or not it is a winding short-circuit mode in which the three-phase windings are short-circuited with each other. In the present embodiment, the control mode determination unit 311 determines that the winding short circuit mode is set when an abnormality is determined in each part of the inverter 20 such as the switching element of the inverter 20. The abnormality of each switching element includes a short circuit failure and an open failure. In the present embodiment, the control mode determination unit 311 determines that the mode is the normal mode when it is not determined that the winding short circuit mode is set.
  • the control mode determination unit 311 determines that the winding short-circuit mode is set when the abnormal pattern of the switching element becomes a predetermined determination pattern. For example, the determination pattern is set to an abnormal pattern of switching elements that cannot execute normal on / off control for on / off control of each switching element but can execute winding short-circuit control for short-circuiting three-phase windings to each other. . Specifically, the control mode determination unit 311 determines that the winding short-circuit mode is selected when a short-circuit failure or an open-circuit failure is determined only for the switching element on one side of the positive electrode side and the negative electrode side.
  • control mode determination unit 311 determines that a short circuit failure has occurred in the switching element on one side of the positive electrode side and the negative electrode side, and an open circuit failure has been determined in the switching element on the other side of the positive electrode side and the negative electrode side. It is determined that the short-circuit mode is set.
  • each switching element is provided with an abnormality detection circuit, and the control mode determination unit 311 determines whether each switching element is abnormal based on an output signal of the abnormality detection circuit.
  • the control mode determination unit 311 compares the on / off control information of each switching element and the winding current to determine whether each switching element is abnormal.
  • the switching control unit 31 turns on the power switch 11 when it is determined as the normal mode and when it is determined as the winding short-circuit mode.
  • the normal mode control unit 312 calculates a three-phase AC voltage command to be applied to the three-phase winding and determines a three-phase AC voltage command when the control mode determination unit 311 determines the normal mode. Based on the above, normal on / off control for on / off control of the switching elements on the positive and negative sides of each phase is performed.
  • the normal mode control unit 312 calculates a three-phase AC voltage command using known vector control.
  • the normal mode control unit 312 performs on / off control of the switching elements on the positive side and the negative side of each phase by PWM control (Pulse Width Modulation) based on the three-phase AC voltage command.
  • the normal mode control unit 312 calculates a three-phase AC voltage command by current feedback control for controlling the current flowing in the winding on the dq axis rotational coordinate system.
  • the rotation coordinate system of the dq axis was determined in the direction of the d axis determined in the direction of the N pole (magnetic pole position) of the permanent magnet provided in the rotor and the direction advanced by 90 ° ( ⁇ / 2) in electrical angle from the d axis.
  • This is a two-axis rotation coordinate system that is composed of q-axis and rotates in synchronization with the rotation of the rotor at the electrical angle.
  • Winding Short-Circuit Mode Control Unit 313 sets all the switching elements on one side of the positive electrode side and the negative electrode side as an initial control state when the control mode determination unit 311 determines the winding short-circuit mode. Winding short-circuit control is started to turn on and turn off all switching elements on the other side of the positive electrode side and the negative electrode side.
  • the winding short-circuit mode control unit 313 turns off all the positive side switching elements 23H and turns on all the negative side switching elements 23L. To. When it is determined that a short-circuit failure has occurred in the positive-side switching element 23H, the winding short-circuit mode control unit 313 turns on all the positive-side switching elements 23H and turns off all the negative-side switching elements 23L. .
  • connection terminals of the three-phase windings are short-circuited to each other in the inverter 20. Therefore, the current flowing through the windings of the respective phases by the induced voltage generated in the windings of the respective phases due to the rotation of the rotor flows in the inverter 20 and returns to the windings of the other phases.
  • FIG. 4 shows a control behavior according to a comparative example in which the winding short-circuit control is continued after starting the winding short-circuit control, unlike the configuration of the present embodiment described later.
  • the control mode determination unit 311 switches the determination result from the normal mode to the winding short-circuit mode due to abnormality detection or the like.
  • the normal mode control unit 312 performs on / off control of each switching element by executing normal on / off control.
  • the winding short-circuit mode control unit 313 performs on-off control of each switching element by continuously executing the winding short-circuit control.
  • the normal mode control unit 312 outputs the negative torque to the AC rotating electric machine 2 to generate power, and the DC current IDC flowing between the DC power supply 10 and the inverter 20 increases in the negative direction. doing.
  • the winding short-circuit control is started, the current flows back through the three-phase winding due to the winding short-circuit, so that the direct current IDC decreases to near zero.
  • FIG. 5 shows the d-axis current Id and the q-axis current Iq obtained by converting the three-phase winding currents Iu, Iv, and Iw into the dq-axis rotational coordinate system at this time.
  • the dq-axis current is located at the point S in FIG. 5, but after starting the winding short-circuit control, the Eq while winding around the point E near the d-axis in the steady state. Go to the point.
  • the d-axis current Id temporarily increases significantly in the negative direction.
  • the component of the rotating magnetic field of the three-phase winding that acts in the direction of weakening the magnetic flux of the permanent magnet increases.
  • the winding short-circuit mode control unit 313 is a case where the control mode determination unit 311 determines that the winding short-circuit mode, and the inter-terminal voltage VDC is lower than a preset first determination voltage Vth1, and When the absolute value of the current based on the winding current exceeds a preset determination current, all-phase opening control for turning off all the switching elements on the positive electrode side and the negative electrode side is started.
  • the winding short-circuit mode control unit 313 is a case where the control mode determination unit 311 determines that the winding short-circuit mode, and when the inter-terminal voltage VDC exceeds a preset second determination voltage Vth2, Start winding short-circuit control.
  • the second determination voltage Vth2 is set in advance to a value equal to or higher than the first determination voltage Vth1.
  • the winding short-circuit control is switched to the all-phase open control, When the switching element is turned off, the return of the winding current between the phases stops, and the absolute value of the winding current decreases. Therefore, an increase in the negative direction of the d-axis current Id is suppressed, and the occurrence of irreversible demagnetization of the permanent magnet can be suppressed.
  • the inverter 20 becomes a three-phase full-wave diode rectifier circuit, and the AC rotating electrical machine 2 functions as a generator.
  • the smoothing capacitor is affected by the parasitic capacitance of the connection path between the DC power supply 10 and the inverter 20. 12 terminal voltage VDC rises.
  • the switching element may fail.
  • the inter-terminal voltage VDC Even if the absolute value of the current is higher than the determination current, if the inter-terminal voltage VDC is not lower than the first determination voltage Vth1, it is not possible to switch to all-phase open control. By switching to the phase opening control, the terminal voltage VDC can be prevented from rising to the withstand voltage of the switching element. Further, since the first determination voltage Vth1 is set to a value equal to or lower than the second determination voltage Vth2, the all-phase open control is performed from the winding short-circuit control in a state where the inter-terminal voltage VDC exceeds the second determination voltage Vth2. Can be prevented, and the rise of the inter-terminal voltage VDC can be reliably prevented.
  • the second determination voltage Vth2 is a value smaller than the withstand voltage of the switching element, and is set in advance to a value larger than the voltage of the DC power supply 10 (for example, 48V).
  • the first determination voltage Vth1 is set to a value lower than the second determination voltage Vth2 and larger than the voltage of the DC power supply 10.
  • the winding short-circuit mode control unit 313 sets the winding current when the absolute value of any of the absolute values of the three-phase winding currents Iu, Iv, and Iw exceeds the determination current. It is determined that the absolute value of the current based on exceeds the determination current.
  • the processing of the switching control unit 31 according to the present embodiment described above can be configured as a flowchart shown in FIG.
  • the processing in the flowchart of FIG. 6 is repeatedly executed at predetermined arithmetic cycles, for example, when the arithmetic processing device 90 executes software (program) stored in the storage device 91.
  • step S01 the control mode determination unit 311 determines whether or not it is a winding short-circuit mode in which the three-phase windings are mutually short-circuited. In the present embodiment, the control mode determination unit 311 determines that the mode is the normal mode when it is not determined that the winding short circuit mode is set.
  • the normal mode control unit 312 calculates a three-phase AC voltage command to be applied to the three-phase winding in step S02, and calculates the three-phase Based on the AC voltage command, normal on / off control is performed for on / off control of the switching elements on the positive and negative sides of each phase.
  • step S01 determines that the winding short circuit mode is selected (step S01: Yes)
  • the winding short circuit mode control unit 313 does not determine the winding short circuit mode last time in step S03, This time, it is determined whether or not the winding short-circuit mode is determined, that is, whether or not it is the first determination of the winding short-circuit mode.
  • step S03 When it is the first determination of the winding short-circuit mode (step S03: Yes), the winding short-circuit mode control unit 313 performs initial control in step S04 and performs all switching on one side of the positive electrode side and the negative electrode side. Winding short-circuit control is started to turn on the element and turn off all the switching elements on the other side of the positive electrode side and the negative electrode side.
  • the winding short-circuit mode control unit 313 determines whether or not the inter-terminal voltage VDC is lower than the first determination voltage Vth1 in step S05 when it is not the first determination in the winding short-circuit mode (step S03: No). judge. If the winding short-circuit mode control unit 313 determines that the inter-terminal voltage VDC is lower than the first determination voltage Vth1 (step S05: Yes), the absolute value of the U-phase winding current Iu is determined in step S06. It is determined whether or not the U-phase determination current Itu is exceeded.
  • the winding short-circuit mode control unit 313 determines that the absolute value of the U-phase winding current Iu exceeds the U-phase determination current Ithu (step S06: Yes), in step S09, All-phase opening control for turning off all switching elements on the negative electrode side is started.
  • the winding short-circuit mode control unit 313 determines that the absolute value of the U-phase winding current Iu does not exceed the U-phase determination current Itu (step S06: No), in step S07, It is determined whether or not the absolute value of the winding current Iv exceeds the V-phase determination current Ithv. When it is determined that the absolute value of the V-phase winding current Iv exceeds the V-phase determination current Ithv (step S07: Yes), the winding short-circuit mode control unit 313 opens all phases in step S09. Start control.
  • the winding short-circuit mode control unit 313 determines that the absolute value of the V-phase winding current Iv does not exceed the V-phase determination current Ithv (step S07: No), in step S08, It is determined whether or not the absolute value of the winding current Iw exceeds the W-phase determination current Ithw. When the absolute value of the W-phase winding current Iw exceeds the W-phase determination current Ithw (step S08: Yes), the winding short-circuit mode control unit 313 opens all phases in step S09. Start control.
  • the U-phase determination current Ithu, the V-phase determination current Ithv, and the W-phase determination current Ithw may be set to mutually different positive values, or may be set to the same positive value.
  • step S08 When it is determined that the absolute value of the W-phase winding current Iw does not exceed the W-phase determination current Ithw (step S08: No), the winding short-circuit mode control unit 313 is currently executing in step S10. Continue executing the winding short-circuit control or all-phase open control.
  • step S05: No When the winding short-circuit mode control unit 313 determines that the terminal voltage VDC is not lower than the first determination voltage Vth1 (step S05: No), the terminal voltage VDC decreases the second determination voltage Vth2 in step S11. It is determined whether or not it exceeds. When it is determined that the inter-terminal voltage VDC exceeds the second determination voltage Vth2 (step S11: Yes), the winding short-circuit mode control unit 313 starts the winding short-circuit control in step S04. On the other hand, when the winding short-circuit mode control unit 313 determines that the inter-terminal voltage VDC does not exceed the second determination voltage Vth2 (step S11: No), the winding short-circuit control currently being executed in step S10. Alternatively, the execution of all-phase opening control is continued.
  • control behavior An example of control behavior according to the present embodiment is shown in FIG.
  • the control mode determination unit 311 switches the determination result from the normal mode to the winding short-circuit mode due to abnormality detection or the like.
  • the normal mode control unit 312 performs on / off control of each switching element by executing normal on / off control.
  • the winding short-circuit mode control unit 313 starts the winding short-circuit control, and the inter-terminal voltage VDC decreases.
  • the inter-terminal voltage VDC is not lower than the first determination voltage Vth1, switching to all-phase open control is not possible. In the state where the inter-terminal voltage VDC is high, switching to the all-phase open control can suppress the inter-terminal voltage VDC from rising to the withstand voltage of the switching element. Further, since the first determination voltage Vth1 is set to a value equal to or lower than the second determination voltage Vth2, the all-phase open control is performed from the winding short-circuit control in a state where the inter-terminal voltage VDC exceeds the second determination voltage Vth2. And the rise of the inter-terminal voltage VDC can be reliably prevented.
  • FIG. 8 shows a d-axis current Id and a q-axis current Iq obtained by converting the three-phase winding currents Iu, Iv, and Iw of FIG. 7 into a dq-axis rotating coordinate system. While the normal on / off control is being executed, the dq-axis current is located at the point S in FIG. 8, but when switching to the all-phase open control, the dq-axis current changes toward the zero point, and the dq-axis current vector When the absolute value decreases and switching to the winding short-circuit control is performed, the dq-axis current changes in the clockwise vortex direction centered on the E point.
  • the dq-axis current changes toward the point E by repeatedly performing the all-phase opening control and the winding short-circuiting control from time T11 to time T12. Each time switching to full-phase open control, the radius of the dq-axis current centering on point E gradually decreases, so the amount of increase in the negative direction of the d-axis current Id during the winding short-circuit control is gradually decreased. doing.
  • the absolute value of the W-phase winding current Iw is lower than the W-phase determination current Ithw. Therefore, even if the inter-terminal voltage VDC is lower than the first determination voltage Vth1, as shown by A in FIGS. 7 and 8, the winding short circuit control is continued.
  • the terminal voltage VDC decreases, but the absolute value of the W-phase winding current Iw increases, and at time T13, the absolute value of the W-phase winding current Iw is increased. The value exceeds the W-phase determination current Ithw and is switched to the all-phase open control.
  • the all-phase opening control is executed, as shown by B in FIGS.
  • the inter-terminal voltage VDC increases although the absolute value of the winding current decreases.
  • the inter-terminal voltage VDC exceeds the second determination voltage Vth2 and is switched to the winding short-circuit control. This switching continues from time T12 to time T15.
  • the winding short-circuit control and the all-phase open control are repeatedly switched to suppress the d-axis current Id from increasing in the negative direction by switching to the all-phase open control. Further, it is possible to suppress the occurrence of irreversible demagnetization of the permanent magnet, and it is possible to suppress the rise of the inter-terminal voltage VDC to the withstand voltage of the switching element by switching to the winding short circuit control.
  • Embodiment 2 Next, the control device 1 according to Embodiment 2 will be described. The description of the same components as those in the first embodiment is omitted. The basic configuration and processing of the AC rotating electrical machine 2 and the control device 1 according to the present embodiment are the same as those of the first embodiment.
  • the winding short-circuit mode control unit 313 converts the three-phase winding currents Iu, Iv, and Iw into the d-axis current Id on the dq-axis rotating coordinate system, and the d-axis current Id
  • the absolute value of exceeds the determination current Ithd of the preset d-axis current it is determined that the absolute value of the current based on the winding current exceeds the determination current.
  • the rotation coordinate system of the dq axis advances by 90 ° ( ⁇ / 2) in electrical angle from the d axis determined in the direction of the N pole (magnetic pole position) of the permanent magnet provided in the rotor and the d axis.
  • the d-axis current determination current Ithd is preset to a value smaller than the absolute value of the d-axis current at which irreversible demagnetization of the permanent magnet starts to occur.
  • the winding short-circuit mode control unit 313 calculates the d-axis current Id and the q-axis current Iq based on the three-phase winding currents Iu, Iv, Iw and the magnetic pole position ⁇ using the following formula.
  • step S26 the winding short-circuit mode control unit 313 Winding currents Iu, Iv, and Iw are converted into d-axis current Id on the dq-axis rotating coordinate system, and it is determined whether or not the absolute value of d-axis current Id exceeds the determination current Ithd of the d-axis current. To do.
  • step S26 When it is determined that the absolute value of the d-axis current Id exceeds the determination current Ithd of the d-axis current (step S26: Yes), the winding short-circuit mode control unit 313 determines whether the positive side and the negative side are in step S09. Start all-phase open control to turn off all switching elements.
  • step S26 When it is determined that the absolute value of the d-axis current Id does not exceed the determination current Ithd of the d-axis current (step S26: No), the winding short-circuit mode control unit 313 performs the winding currently being executed in step S10. Continue execution of wire short-circuit control or all-phase open control.
  • step S05: No When the winding short-circuit mode control unit 313 determines that the terminal voltage VDC is not lower than the first determination voltage Vth1 (step S05: No), the terminal voltage VDC decreases the second determination voltage Vth2 in step S11. It is determined whether or not it exceeds. When it is determined that the inter-terminal voltage VDC exceeds the second determination voltage Vth2 (step S11: Yes), the winding short-circuit mode control unit 313 starts the winding short-circuit control in step S04. On the other hand, when the winding short-circuit mode control unit 313 determines that the inter-terminal voltage VDC does not exceed the second determination voltage Vth2 (step S11: No), the winding short-circuit control currently being executed in step S10. Alternatively, the execution of all-phase opening control is continued.
  • the first determination voltage Vth1 is set to a value smaller than the second determination voltage Vth2
  • the first determination voltage Vth1 may be set to the same value as the second determination voltage Vth2. In this case, the switching between the winding short-circuit control and the all-phase open control becomes fast, but the inter-terminal voltage VDC can be prevented from exceeding the second determination voltage Vth2.
  • the switching control unit 31 takes the case where the power switch 11 is turned on as an example when it is determined as the normal mode and when it is determined as the winding short-circuit mode. explained. However, embodiments of the present disclosure are not limited to this. That is, the switching control unit 31 may turn on the power switch 11 when it is determined as the normal mode, and turn off the power switch 11 when it is determined as the winding short-circuit mode.
  • the switching control unit 31 exemplifies a case where it is determined that the winding short-circuit mode is set when an abnormality of each part of the inverter 20 such as the switching element of the inverter 20 is determined. explained. However, embodiments of the present disclosure are not limited to this. That is, the switching control unit 31 may determine that the winding short-circuit mode is set in other cases such as when the operation of the AC rotating electric machine 2 is stopped.
  • the switching control unit 31 has been described as an example in which the switching control unit 31 is configured to determine that it is in the winding short-circuit mode or the normal mode. However, the switching control unit 31 may determine that the mode is other than the winding short-circuit mode and the normal mode, and perform on / off control of the switching elements corresponding to the other modes.
  • the switching control unit 31 has been described as an example in which the switching control unit 31 is configured to start the winding short-circuit control as the initial control state after starting the winding short-circuit mode.
  • the switching control unit 31 starts the winding short-circuit mode, the voltage between the terminals is lower than the second determination voltage, and the absolute value of the winding current exceeds the determination current. All-phase opening control may be started.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Control Of Ac Motors In General (AREA)

Abstract

La présente invention concerne un dispositif de commande destiné à une machine électrique rotative à courant alternatif qui peut augmenter un courant d'axe d dans une direction négative et supprimer l'apparition d'une démagnétisation irréversible d'un aimant permanent, après qu'une commande de court-circuit d'enroulement pour court-circuiter une pluralité d'enroulements est exécutée. Lorsqu'il est déterminé que le dispositif de commande se trouve dans un mode de court-circuit d'enroulement, lorsqu'une tension entre bornes (V c.c.) d'un condensateur de filtrage (12) est inférieure à une première tension de détermination (Vth1) et lorsqu'une valeur absolue d'un courant fondée sur un courant d'enroulement est supérieure à un courant de détermination, le dispositif de commande (1) prévu pour une machine électrique rotative à courant alternatif exécute une commande d'ouverture de toutes les phases qui désactive tous les éléments de commutation. Lorsque la tension entre bornes (V c.c.) est supérieure à une seconde tension de détermination (Vth2), le dispositif de commande (1) exécute une commande de court-circuit d'enroulement qui active tous les éléments de commutation sur un côté entre un côté d'électrode positive et un côté d'électrode négative et qui désactive tous les éléments de commutation sur l'autre côté entre le côté d'électrode positive et le côté d'électrode négative.
PCT/JP2018/018487 2018-05-14 2018-05-14 Dispositif de commande pour machine électrique rotative à courant alternatif WO2019220484A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/JP2018/018487 WO2019220484A1 (fr) 2018-05-14 2018-05-14 Dispositif de commande pour machine électrique rotative à courant alternatif

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2018/018487 WO2019220484A1 (fr) 2018-05-14 2018-05-14 Dispositif de commande pour machine électrique rotative à courant alternatif

Publications (1)

Publication Number Publication Date
WO2019220484A1 true WO2019220484A1 (fr) 2019-11-21

Family

ID=68540248

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2018/018487 WO2019220484A1 (fr) 2018-05-14 2018-05-14 Dispositif de commande pour machine électrique rotative à courant alternatif

Country Status (1)

Country Link
WO (1) WO2019220484A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111509917A (zh) * 2020-03-31 2020-08-07 江苏大学 一种永磁同步电机的充磁退磁控制装置与方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002010694A (ja) * 2000-06-23 2002-01-11 Denso Corp 界磁巻線型回転電機の制御装置
WO2012070106A1 (fr) * 2010-11-22 2012-05-31 ヤマハ発動機株式会社 Véhicule électrique à deux roues
WO2016181448A1 (fr) * 2015-05-11 2016-11-17 三菱電機株式会社 Dispositif de commande de machine électrique tournante à courant alternatif
JP2017147806A (ja) * 2016-02-16 2017-08-24 三菱電機株式会社 電動機制御装置および電動機制御方法
JP6305605B1 (ja) * 2017-05-22 2018-04-04 三菱電機株式会社 モータ制御装置

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002010694A (ja) * 2000-06-23 2002-01-11 Denso Corp 界磁巻線型回転電機の制御装置
WO2012070106A1 (fr) * 2010-11-22 2012-05-31 ヤマハ発動機株式会社 Véhicule électrique à deux roues
WO2016181448A1 (fr) * 2015-05-11 2016-11-17 三菱電機株式会社 Dispositif de commande de machine électrique tournante à courant alternatif
JP2017147806A (ja) * 2016-02-16 2017-08-24 三菱電機株式会社 電動機制御装置および電動機制御方法
JP6305605B1 (ja) * 2017-05-22 2018-04-04 三菱電機株式会社 モータ制御装置

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111509917A (zh) * 2020-03-31 2020-08-07 江苏大学 一种永磁同步电机的充磁退磁控制装置与方法
CN111509917B (zh) * 2020-03-31 2021-06-18 江苏大学 一种永磁同步电机的充磁退磁控制装置与方法

Similar Documents

Publication Publication Date Title
JP6169203B1 (ja) 電動機制御装置および電動機制御方法
JP6394030B2 (ja) インバータ制御装置
US11296617B2 (en) Inverter control device
JP6416414B2 (ja) 交流回転機の制御装置
JP6348424B2 (ja) 電力変換装置
JP6423264B2 (ja) 電力変換装置
JP7086505B1 (ja) 交流回転電機の制御装置
JP6289597B1 (ja) 車両用電源装置および車両用電源装置の制御方法
JP2015198463A (ja) インバータ制御装置
JP6173516B1 (ja) 電動機制御装置および電動機制御方法
JP6342043B1 (ja) 電動機制御装置および電動機制御方法
WO2019220484A1 (fr) Dispositif de commande pour machine électrique rotative à courant alternatif
JP6203318B1 (ja) 電動機制御装置および電動機制御方法
JP2022048606A (ja) モータ制御装置、モータユニット、及び車両
JP6708843B2 (ja) 駆動装置
JP7446358B2 (ja) 交流回転電機の制御装置
JP7479272B2 (ja) 電力変換装置
JP7499626B2 (ja) 電力変換制御装置
JP7468377B2 (ja) 回転電機の制御装置
JP7309002B1 (ja) 電力変換装置
JP7271735B2 (ja) 交流回転電機の制御装置
WO2022107618A1 (fr) Dispositif de conversion de courant et système de conversion de courant
JP2022080185A (ja) 電力変換装置
JP2022037658A (ja) 電力変換装置

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 18919070

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 18919070

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: JP