JP7276293B2 - power converter controller - Google Patents

Description

The present invention relates to a control device for a power converter having switches on upper and lower arms electrically connected to each phase winding of a rotating electric machine.

As a control device of this type, there is known a control device that performs shutdown control to forcibly turn off the switches of the upper and lower arms when it is determined that an abnormality has occurred in a rotating electric machine or the like. When shutdown control is performed, if a back electromotive voltage is generated in the windings due to the rotation of the rotor that constitutes the rotating electric machine, the line voltage of the windings is connected in parallel to the series connection of the switches of the upper and lower arms. may be higher than the voltage of the storage unit. A situation in which the line voltage becomes high can occur, for example, when the field magnetic flux amount of the rotor is large or when the rotational speed of the rotor is high.

If the line-to-line voltage of the winding becomes higher than the voltage of the storage unit, even if shutdown control is performed, the closed circuit including the diode, the winding, and the storage unit connected in anti-parallel to the switch will So-called regeneration is performed in which the generated induced current flows. As a result, the DC voltage on the power storage unit side of the power converter increases significantly, and there is concern that at least one of the power storage unit, the power converter, and devices other than the power converter connected to the power storage unit may fail.

In order to deal with such a problem, as described in Patent Document 1, a control circuit that performs short-circuit control by turning on the switch in one of the upper and lower arms and turning off the switch in the other arm is provided. Are known.

Japanese Patent Publication No. 2013-506390

An anomaly can occur in the control circuit that makes it impossible to control the implementation of the short-circuit control. In this case, for example, there is a possibility that the short-circuit control continues to be implemented even though the short-circuit control should be canceled. As a result, a large circulating current flows in the closed circuit including the windings and the switch, and there is concern that the switch may malfunction.

Such an anomaly also occurs in a system including a plurality of rotating electric machines and power converters, and in a configuration in which a control circuit is provided for each power converter.

A main object of the present invention is to provide a power converter control device capable of appropriately controlling the implementation of short-circuit control.

The present invention is a power converter control applied to a system comprising a plurality of multiphase rotating electrical machines and power converters having upper and lower arm switches electrically connected to each phase winding of the rotating electrical machine. In the apparatus, a control circuit is provided individually for each of the power converters, and each of the control circuits controls a communication target, which is a control circuit other than itself among the control circuits, of the upper and lower arms. a signal generator for generating a control signal for short-circuit control for turning on the on-side switch, which is the switch in one of the arms, and turning off the off-side switch, which is the switch in the other arm; and the generated control signal. a signal transmission unit that transmits the above, a reception unit that receives the control signal transmitted from the signal transmission unit of the communication target, and receives the control signal for performing the short-circuit control via the reception unit When the short-circuit control is performed, the short-circuit control is performed, and when the control signal indicating that the short-circuit control is not performed during the short-circuit control is received via the receiving unit, the short-circuit control is canceled. and a control unit.

In the present invention, each control circuit transmits a control signal for short-circuit control to a communication target, which is a control circuit other than itself among the control circuits, via the signal transmission unit. The communication target implements the short-circuit control when receiving the control signal for implementing the short-circuit control via the receiving unit. Thereafter, the communication target cancels the short-circuit control when receiving the control signal indicating that the short-circuit control is not performed via the receiving unit. As a result, even if an abnormality related to the implementation of short-circuit control occurs in one of the plurality of control circuits, short-circuit control can be performed by a control signal transmitted from another control circuit. Short-circuit control can be released. As a result, implementation of short-circuit control can be properly controlled.

1 is an overall configuration diagram of a vehicle according to a first embodiment; FIG. The whole block diagram of a control system. The figure which shows a control circuit and its peripheral structure. 4 is a flowchart showing the procedure of processing performed by the control system; 9 is a flowchart showing the procedure of processing performed by a control system according to the second embodiment; FIG. 11 is a flow chart showing the procedure of processing performed by a control system according to a third embodiment; FIG. The figure for demonstrating the control signal which concerns on 4th Embodiment. The whole block diagram of the control system which concerns on 5th Embodiment. 4 is a flowchart showing the procedure of processing performed by the control system;

<First Embodiment>
A first embodiment embodying a control circuit according to the present invention will be described below with reference to the drawings. The control circuit according to this embodiment is applied to a three-phase inverter as a power converter. In this embodiment, a control system including two inverters is mounted on a vehicle such as an electric vehicle or a hybrid vehicle.

As shown in FIG. 1 , the vehicle 10 includes a control system, and the control system includes a first rotating electrical machine 11 a, a first inverter 15 a, a second rotating electrical machine 11 b, a second inverter 15 b, and a high-voltage power supply 30 .

The first rotating electric machine 11a includes a first rotor 12a and first windings 13a shown in FIG. The first rotor 12a and the first drive wheel 16a are connected via a first rotating shaft 14a. The first winding 13a is energized and the first rotating shaft 14a rotates. This causes the first drive wheel 16a to rotate.

The second rotating electric machine 11b has a second rotor 12b and a second winding 13b shown in FIG. The second rotor 12b and the second drive wheel 16b are connected via a second rotating shaft 14b. The second winding 13b of the second rotating electrical machine 11b is energized, and the second rotating shaft 14b rotates. Thereby, the second driving wheel 16b rotates.

Rotation of at least one of the drive wheels 16a and 16b enables the vehicle 10 to travel. In this embodiment, the first drive wheel 16a is the front wheel of the vehicle 10 and the second drive wheel 16b is the rear wheel of the vehicle 10. As shown in FIG.

As shown in FIG. 2, the first inverter 15a includes a first switching device section 20a. The first switching device section 20a includes three phases of series-connected bodies of upper arm switches SWH and lower arm switches SWL. In each phase, the first end of the first winding 13a is connected to the connection point between the upper and lower arm switches SWH and SWL. A second end of each phase first winding 13a is connected at a neutral point. The first windings 13a of the respective phases are arranged with an electrical angle of 120° shifted from each other. Incidentally, in this embodiment, voltage-controlled semiconductor switching elements, more specifically, IGBTs, are used as the switches SWH and SWL. Upper and lower arm diodes DH and DL, which are freewheel diodes, are connected in anti-parallel to the upper and lower arm switches SWH and SWL.

The second inverter 15b has a second switching device section 20b. In this embodiment, the configurations of the first and second switching device sections 20a and 20b are basically the same. Therefore, detailed description of the second switching device section 20b is omitted. A first end of the second winding 13b is connected to a connection point between the upper and lower arm switches SWH and SWL in each phase of the second switching device section 20b.

In the first and second switching device sections 20a and 20b, the positive terminal of the high-voltage power supply 30 is connected to the collector, which is the high potential side terminal of each upper arm switch SWH, via the high potential side electric path 22H. . In the first and second switching device sections 20a and 20b, the emitter, which is the low potential side terminal of each lower arm switch SWL, is connected to the negative terminal of the high voltage power supply 30 via the low potential side electric path 22L. . In this embodiment, the high-voltage power supply 30 is a secondary battery, and its output voltage (rated voltage) is, for example, 100 V or higher.

A first cutoff switch 23a is provided in the high potential side electric path 22H, and a second cutoff switch 23b is provided in the low potential side electric path 22L. Each switch 23a, 23b is, for example, a relay or a semiconductor switching element. Here, each switch 23a, 23b is driven by a first control circuit 50a provided in the first inverter 15a, a second control circuit 50b provided in the second inverter 15b, or a control device higher than each control circuit 50a, 50b. be done.

The control system comprises on-board electrical equipment 25 . The electrical device 25 includes, for example, at least one of an electric compressor and a DCDC converter. The electric compressor constitutes a vehicle interior air conditioner, and is powered by a high-voltage power supply 30 and driven to circulate the refrigerant in the vehicle-mounted refrigeration cycle. The DCDC converter steps down the output voltage of the high-voltage power supply 30 and supplies it to an in-vehicle low-voltage load. The low voltage load includes the low voltage power supply 31 shown in FIG. In this embodiment, the low-voltage power supply 31 is a secondary battery whose output voltage (rated voltage) is lower than the output voltage (rated voltage) of the high-voltage power supply 30 (for example, 12 V), such as a lead-acid battery.

The first inverter 15a includes a smoothing capacitor 24 as a "storage unit". The smoothing capacitor 24 is located on the first and second switching device sections 20a and 20b side of the high potential side electrical path 22H rather than the first cutoff switch 23a, and of the low potential side electrical path 22L side of the second cutoff switch 23b. 1 and the second switching device portions 20a and 20b are electrically connected. The smoothing capacitor 24 may be provided in the second inverter 15b instead of the first inverter 15a, or may be provided outside the inverters 15a and 15b.

The control system comprises phase current sensors 40 and temperature sensors 41 . The phase current sensors 40 individually detect currents flowing through the rotating electric machines 11a and 11b. Phase current sensors 40 detect currents for at least two phases among the U-, V-, and W-phase currents flowing through the rotating electric machines 11a and 11b. The temperature sensor 41 individually detects the temperature of each switching device section 20a, 20b. A temperature sensor 41 detects the temperature of at least one of the switches SWH and SWL forming the switching device units 20a and 20b or the temperature of the peripheral structure thereof.

The configuration of each of the control circuits 50a and 50b will be described with reference to FIG.

The first control circuit 50a includes a first microcomputer 51a provided in the low voltage region. A current signal from the phase current sensor 40 and a temperature signal from the temperature sensor 41 are input to the first microcomputer 51a. The first microcomputer 51a calculates the phase current Ir flowing through the first rotating electrical machine 11a based on the input current signal. The first microcomputer 51a calculates the temperature of the detection target of the temperature sensor 41 based on the input temperature signal.

The first control circuit 50a includes a first voltage detection section 64a. The first voltage detector 64a is provided in the low voltage area and the high voltage area across the boundary between the low voltage area and the high voltage area electrically insulated from the low voltage area. The first voltage detector 64 a outputs a voltage signal corresponding to the terminal voltage of the smoothing capacitor 24 . The voltage signal output from the first voltage detector 64a is input to the first microcomputer 51a. In the present embodiment, the first voltage detection section 64a has a conversion function of stepping down the terminal voltage of the smoothing capacitor 24 to a voltage range (for example, 0 to 5 V) that can be input to the first microcomputer 51a. The first microcomputer 51a detects the terminal voltage of the smoothing capacitor 24 based on the input voltage signal.

The first microcomputer 51a generates switching commands composed of ON commands and OFF commands for the switches SWH and SWL. In the present embodiment, the first microcomputer 51a outputs a switching command for performing normal drive control and three-phase short circuit control (ASC: Active Short Circuit) based on the detected voltage VH of the first voltage detector 64a. and/or switching commands to implement.

In normal drive control, the control amount of the first rotating electric machine 11a is controlled to the command value. The controlled variable is, for example, torque. In this embodiment, when the voltage VH detected by the first voltage detector 64a is equal to or less than a predetermined value, it is determined that an overvoltage abnormality has not occurred, and normal drive control is performed.

In the three-phase short-circuit control, the upper arm switch SWH is turned off and the lower arm switch SWL is turned on. In this embodiment, when the voltage VH detected by the first voltage detector 64a is higher than a predetermined value, it is determined that an overvoltage abnormality has occurred, and three-phase short-circuit control is performed. Shutdown control for forcibly turning off the upper and lower arm switches SWH and SWL may be performed before the three-phase short-circuit control is performed. In this embodiment, the lower arm switch SWL corresponds to the "on-side switch" and the upper arm switch SWH corresponds to the "off-side switch".

The first control circuit 50a includes a first insulated power supply 60a, a first transmission section 61a, and a first driver 70a. The first insulated power source 60a and the first transmission unit 61a are provided in the low voltage region and the high voltage region across the boundary between the low voltage region and the high voltage region. The first driver 70a is provided in the high voltage region.

The first driver 70a has an upper arm driver and a lower arm driver. An upper arm driver is individually provided corresponding to each upper arm switch SWH of the first switching device section 20a. A lower arm driver is individually provided corresponding to each lower arm switch SWL of the first switching device section 20a. Therefore, a total of six first drivers 70a are provided.

Based on the output voltage of the low-voltage power supply 31, the first insulated power supply 60a generates and outputs power to be supplied to the first driver 70a. Specifically, the first insulated power supply 60a includes an upper arm insulated power supply provided individually for each of the three-phase upper arm drivers that make up the first driver 70a, and a three-phase power supply that makes up the first driver 70a. A lower arm insulated power supply common to the lower arm drivers is provided. The lower arm insulated power supply may be provided individually for each of the three-phase lower arm drivers that constitute the first driver 70a.

The first transmission unit 61a electrically insulates between the low voltage region and the high voltage region, and transmits the switching command output from the first microcomputer 51a to the first driver 70a. The configuration of the first transmission portion 61a on the high voltage region side is configured to be operable by power supply from the first insulated power source 60a. The configuration of the low-voltage region side of the first transmission portion 61 a is configured to be operable by power supply from the low-voltage power supply 31 . The first transmission unit 61a is, for example, a photocoupler or a magnetic coupler.

The upper arm driver that constitutes the first driver 70a supplies charging current to the gate of the corresponding upper arm switch SWH when an ON command is input. As a result, the gate voltage VgH of the upper arm switch SWH becomes equal to or higher than the threshold voltage Vth, and the upper arm switch SWH is turned on. On the other hand, when an off command is input, the upper arm driver that constitutes the first driver 70a causes a discharge current to flow from the gate of the corresponding upper arm switch SWH to the emitter side. As a result, the gate voltage VgH of the upper arm switch SWH becomes less than the threshold voltage Vth, and the upper arm switch SWH is turned off.

A lower arm driver that constitutes the first driver 70a supplies a charging current to the gate of the corresponding lower arm switch SWL when an ON command is input. As a result, the gate voltage VgL of the lower arm switch SWL becomes equal to or higher than the threshold voltage Vth, and the lower arm switch SWL is turned on. On the other hand, when an off command is input, the lower arm driver that constitutes the first driver 70a causes a discharge current to flow from the gate of the corresponding lower arm switch SWL to the emitter side. As a result, the gate voltage VgL of the lower arm switch SWL becomes less than the threshold voltage Vth, and the lower arm switch SWL is turned off.

The second control circuit 50b includes a second microcomputer 51b, a second insulated power supply 60b, a second transmission section 61b, a second voltage detection section 64b, and a second driver 70b. In this embodiment, these configurations are basically the same as the configuration of the first control circuit 50a. Therefore, detailed description of the second control circuit 50b is omitted. In the second control circuit 50b, the second microcomputer 51b corresponds to the first microcomputer 51a, the second insulated power supply 60b corresponds to the first insulated power supply 60a, the second transmission section 61b corresponds to the first transmission section 61a, The second voltage detection section 64b corresponds to the first voltage detection section 64a, and the second driver 70b corresponds to the first driver 70a. In this embodiment, the first and second microcomputers 51a and 51b correspond to the "switching command generator", the first and second drivers 70a and 70b correspond to the "switch driver", and the first and second The two insulated power supplies 60a and 60b correspond to the "driving insulated power supply".

In the first control circuit 50a, execution of the three-phase short-circuit control is controlled based on the detected voltage VH of the first voltage detection section 64a. However, with only the configuration described above, if at least one of the first microcomputer 51a, the first insulated power supply 60a, the first transmission unit 61a, and the first voltage detection unit 64a fails, it becomes impossible to control the implementation of the three-phase short-circuit control. There is concern that In this case, a large circulating current flows in the closed circuit including the first winding 13a and the lower arm switch SWL of the first switching device section 20a, and the first switching device section 20a fails. there's a possibility that.

Also in the second control circuit 50b, if at least one of the second microcomputer 51b, the second insulated power supply 60b, the second transmission unit 61b, and the second voltage detection unit 64b fails, the above-described problem occurs.

Therefore, in the present embodiment, even if an abnormality occurs in which one of the first and second control circuits 50a and 50b cannot control the execution of the three-phase short-circuit control, control is performed in which the abnormality does not occur. The circuitry provides configuration for controlling the implementation of three-phase short control.

The first control circuit 50a includes a first monitoring section 52a, a first transmission section 53a, a first reception section 54a, a third transmission section 62a, and a third insulated power supply 63a. The first monitoring section 52a, the first transmitting section 53a and the first receiving section 54a are provided in the low pressure region. The third transmission part 62a and the third insulated power supply 63a are provided in the low voltage area and the high voltage area across the boundary between the low voltage area and the high voltage area. The first monitoring unit 52 a , the configuration of the third transmission unit 62 a on the low voltage region side, and the third insulated power supply 63 a are configured to be operable by being supplied with power from the low voltage power supply 31 . The structure on the high voltage region side of the third transmission part 62a is configured to be operable by power supply from the third insulated power supply 63a. In addition, the third transmission unit 62a is, for example, a photocoupler or a magnetic coupler.

The first monitoring unit 52a has a function of monitoring whether or not an abnormality has occurred in the first control circuit 50a, and is composed of, for example, a watchdog counter (WDC) or a function watchdog counter (F-WDC). ing. When at least one of the first microcomputer 51a, the first insulated power supply 60a, the first transmission unit 61a, and the first voltage detection unit 64a fails, the first monitoring unit 52a causes the first control circuit 50a to perform three-phase short-circuit control. It is determined that an abnormality has occurred that cannot control the execution of

The second control circuit 50b includes a second monitoring section 52b, a second transmitting section 53b, a second receiving section 54b, a fourth transmitting section 62b, and a fourth insulated power supply 63b. The second monitoring section 52b, the second transmitting section 53b and the second receiving section 54b are provided in the low pressure region. The fourth transmission part 62b and the fourth insulated power supply 63b are provided in the low voltage area and the high voltage area across the boundary between the low voltage area and the high voltage area. The second monitoring unit 52 b , the configuration of the fourth transmission unit 62 b on the low voltage region side, and the fourth insulated power supply 63 b are configured to be operable by being supplied with power from the low voltage power supply 31 . The configuration on the high voltage region side of the fourth transmission portion 62b is configured to be operable by power supply from the fourth insulated power source 63b. In addition, the fourth transmission unit 62b is, for example, a photocoupler or a magnetic coupler.

In this embodiment, the first and second transmitters 53a and 53b correspond to the "signal transmitter", the first and second receivers 54a and 54b correspond to the "receiver", and the third and fourth insulators The power supplies 63a and 63b correspond to "abnormal insulated power supply".

The second monitoring unit 52b has a function of monitoring whether or not an abnormality has occurred in the second control circuit 50b, and is composed of, for example, a watchdog counter (WDC) or a function watchdog counter (F-WDC). ing. When at least one of the second microcomputer 51b, the second insulated power supply 60b, the second transmission unit 61b, and the second voltage detection unit 64b fails, the second monitoring unit 52b causes the second control circuit 50b to perform three-phase short-circuit control. It is determined that an abnormality has occurred that cannot control the execution of

In the following, the control performed by the first and second control circuits 50a and 50b when an abnormality occurs in which the first control circuit 50a cannot control the three-phase short-circuit control will be described.

When the first monitoring unit 52a determines that the first control circuit 50a is incapable of controlling the implementation of the three-phase short-circuit control, the first monitoring unit 52a switches the logic of the notification signal Sg1 to H, and outputs it to the first transmission unit 53a. do. The notification signal Sg1 indicates that the first control circuit 50a has an abnormality that makes it impossible to control the execution of the three-phase short-circuit control by logic H, and the execution of the three-phase short-circuit control is controlled by the first control circuit 50a by logic L. Indicates that an error that cannot be performed has not occurred.

The first transmitter 53a transmits the input notification signal Sg1 to the second receiver 54b. The second receiver 54b outputs the received notification signal Sg1 to the second microcomputer 51b. In this embodiment, the first transmitter 53a and the second receiver 54b are connected by a communication line.

When the notification signal Sg1 of logic H is input, the second microcomputer 51b performs regeneration determination processing in order to control the execution of the three-phase short-circuit control of the first control circuit 50a as the "communication target". In the regeneration determination process, in the first inverter 15a and the first rotating electrical machine 11a provided with the first control circuit 50a, power regeneration occurs in which current flows from the first rotating electrical machine 11a side to the smoothing capacitor 24 side. This is a process in which the second microcomputer 51b determines whether or not.

The regeneration determination process includes a process of estimating the line voltage Vemf of the first winding 13a based on the regeneration determination information Nr input to the second microcomputer 51b. In this embodiment, the regeneration determination information Nr is the rotational speed of the first rotating electric machine 11a. The first microcomputer 51a acquires the regeneration determination information Nr, which is the rotational speed of the first rotating electric machine 11a, and transmits it to the second microcomputer 51b via the first transmitter 53a and the second receiver 54b. The second microcomputer 51b uses "Vemf=K×Nr" based on the acquired regeneration determination information Nr, which is the rotation speed of the first rotating electrical machine 11a, to calculate Estimate the line voltage Vemf at . K is a constant and is a value determined from the amount of magnetic flux φ of the magnetic poles of the rotors 12a and 12b. In this embodiment, the first transmitter 53a corresponds to the "information transmitter".

The second microcomputer 51b determines that power regeneration occurs when the estimated line voltage Vemf generated in the first winding 13a is higher than the detection voltage VH of the second voltage detection unit 64b. In this case, the second microcomputer 51b outputs a logic H control signal Sg2 to the second transmission section 53b. On the other hand, the second microcomputer 51b determines that power regeneration does not occur when the estimated line voltage Vemf generated in the first winding 13a is equal to or lower than the detection voltage VH of the second voltage detection section 64b. In this case, the second microcomputer 51b outputs a logic L control signal Sg2 to the second transmitting section 53b. Here, the control signal Sg2 indicates a switching command for implementing three-phase short-circuit control by logic H, and a switching command for implementing shutdown control by logic L. In this embodiment, the second microcomputer 51b corresponds to the "signal generator" and the "regeneration determination unit".

The second transmitter 53b transmits the input control signal Sg2 to the first receiver 54a. The first receiver 54a outputs the received control signal Sg2 to the third transmitter 62a. The third transmission unit 62a outputs the input control signal Sg2 to the first driver 70a. In this embodiment, the first receiving section 54a and the second transmitting section 53b are connected by a communication line.

The first driver 70a performs three-phase short-circuit control when the control signal Sg2 of logic H is received, and performs shutdown control when the control signal Sg2 of logic L is received. As a result, when an abnormality occurs in which the first control circuit 50a cannot control the execution of the three-phase short-circuit control, the three-phase short-circuit control and the shutdown control are switched based on the control signal Sg2 output from the second microcomputer 51b. be done. In the present embodiment, the first driver 70a corresponds to the "abnormal control section".

When the logic of the notification signal Sg1 output from the first monitoring unit 52a is switched from H to L, the second microcomputer 51b performs cancellation processing to cancel the three-phase short-circuit control or shutdown control of the first control circuit 50a. to implement. The release process is a process of stopping the output of the control signal Sg2. In this case, the second transmitter 53b stops transmitting the control signal Sg2, the first receiver 54a stops receiving the control signal Sg2, and the first driver 70a performs three-phase short-circuit control or Implementation of shutdown control is stopped. In this case, the first control circuit 50a restarts the normal driving control based on, for example, a switching command from the first microcomputer 51a.

FIG. 4 shows the procedure of processing performed by the control system. This process is repeatedly executed at a predetermined cycle.

In step S10, the second microcomputer 51b determines whether the logic of the notification signal Sg1 is "H". If the determination in step S10 is negative, the process proceeds to step S11.

In step S11, the second microcomputer 51b determines whether the logic of the flag F is H. The flag F is a signal that is set to logic H when the first driver 70a was performing three-phase short-circuit control or shutdown control based on the control signal Sg2 in the previous control cycle. is a signal that is set to logic L when normal driving control is being performed. If a negative determination is made in step S11, the second microcomputer 51b determines that an abnormality in which the execution of the three-phase short-circuit control cannot be controlled in the first control circuit 50a has occurred from the previous control cycle to the current control cycle. It is determined that there is not, and the process proceeds to step S12.

In step S12, the first driver 70a performs normal drive control based on the switching command from the first microcomputer 51a, and the second driver 70b performs normal drive control based on the switching command from the second microcomputer 51b. do. In step S13, the second microcomputer 51b sets the logic of the flag F to L.

When an affirmative determination is made in step S10, the process proceeds to step S14, and the second microcomputer 51b performs regeneration determination processing. In step S14, the second microcomputer 51b acquires regeneration determination information Nr, which is the rotational speed of the first rotating electric machine 11a. In step S15, the second microcomputer 51b estimates the line voltage Vemf of the first winding 13a based on the regeneration determination information Nr. In step S16, the second microcomputer 51b determines whether or not the estimated line voltage Vemf is higher than the detected voltage VH of the second voltage detector 64b. It should be noted that steps S14 to S16 are regeneration determination processing.

If the determination in step S16 is affirmative, the second microcomputer 51b determines that power regeneration is occurring in the first inverter 15a and the first rotating electrical machine 11a, and proceeds to step S17.

In step S17, the second microcomputer 51b outputs a control signal Sg2 of logic H to the second transmission section 53b. In step S18, the second transmitter 53b transmits the input control signal Sg2 of logic H to the first receiver 54a. In step S19, the first receiving section 54a receives the control signal Sg2 of logic H and transmits it to the first driver 70a via the third transmitting section 62a.

In step S20, the first driver 70a performs three-phase short-circuit control based on the control signal Sg2 of logic H. On the other hand, the second driver 70b of the second control circuit 50b in which no abnormality has occurred performs normal drive control based on the switching command from the second microcomputer 51b. In step S21, the second microcomputer 51b sets the logic of the flag F to H.

When a negative determination is made in step S16, the second microcomputer 51b determines that power regeneration does not occur in the first inverter 15a and the first rotating electric machine 11a, and proceeds to step S22.

In step S22, the second microcomputer 51b outputs the control signal Sg2 of logic L to the second transmission section 53b. In step S23, the second transmitter 53b transmits the input control signal Sg2 of logic L to the first receiver 54a. In step S24, the first receiving section 54a receives the control signal Sg2 of logic L and transmits it to the first driver 70a via the third transmitting section 62a.

In step S25, the first driver 70a performs shutdown control based on the control signal Sg2 of logic L. On the other hand, the second driver 70b of the second control circuit 50b in which no abnormality has occurred performs normal drive control based on the switching command from the second microcomputer 51b. After that, the process proceeds to step S21.

If a negative determination is made in step S10 and an affirmative determination is made in step S11, the second microcomputer 51b causes the first driver 70a to perform three-phase short-circuit control or shutdown control based on the control signal Sg2 in the previous control cycle. was performed, and the process proceeds to step S26. In step S26, the second microcomputer 51b carries out a cancellation process. As a result, the second microcomputer 51b stops outputting the control signal Sg2. As a result, in step S27, the first driver 70a cancels the three-phase short-circuit control or shutdown control based on the control signal Sg2. After that, the process proceeds to step S12.

According to this embodiment detailed above, the following effects can be obtained.

When an abnormality occurs in the first control circuit 50a that makes it impossible to control the three-phase short-circuit control, three-phase short-circuit control or shutdown control is performed based on the control signal Sg2 from the second microcomputer 51b. After that, when the abnormal state in which the execution of the three-phase short-circuit control cannot be controlled is resolved, the second microcomputer 51b performs cancellation processing to cancel the execution of the three-phase short-circuit control or the shutdown control. As a result, even if an abnormality occurs in which the first control circuit 50a cannot control the implementation of the three-phase short-circuit control, the second microcomputer 51b can determine which of the three-phase short-circuit control, shutdown control, and normal drive control. Either one can be properly implemented.

When an abnormality occurs in the first control circuit 50a in which the execution of the three-phase short-circuit control cannot be controlled, the second microcomputer 51b performs regeneration determination processing for the first control circuit 50a. If the regeneration determination process determines that power regeneration will occur, three-phase short-circuit control is performed. Thereby, it is possible to suppress an increase in the voltage of the smoothing capacitor 24 . On the other hand, if the regeneration determination process determines that power regeneration does not occur, shutdown control is performed. As a result, a large circulating current flows in the closed circuit including the first winding 13a and the lower arm switch SWL of the first switching device section 20a, thereby preventing the first switching device section 20a from breaking down. can. As a result, it is possible to appropriately control the implementation of the three-phase short-circuit control.

The regeneration determination information Nr used for estimating the line voltage Vemf of the first winding 13a is transmitted from the first microcomputer 51a to the second microcomputer 51b via the first transmitter 53a and the second receiver 54b. As a result, the second microcomputer 51b can estimate the line-to-line voltage Vemf of the first winding 13a even when the first control circuit 50a fails to perform the three-phase short-circuit control.

In the first and second control circuits 50a and 50b, the first and second transmitters 53a and 53b and the first and second receivers 54a and 54b are provided in the low voltage region. Accordingly, when an abnormality occurs in which the execution of the three-phase short-circuit control cannot be controlled, communication between the first and second control circuits 50a and 50b is performed in the low voltage region. Therefore, compared with the case where communication is performed in a high voltage region where it is necessary to electrically insulate between the first and second control circuits 50a and 50b, it is possible to suppress an increase in the size of the device, which in turn reduces the size of the power converter. The manufacturing cost of the control circuit can be suppressed.

The third insulated power supply 63a is provided independently of the first insulated power supply 60a, and the fourth insulated power supply 63b is provided independently of the second insulated power supply 60b. As a result, even when an abnormality occurs in which normal drive control cannot be performed, three-phase short-circuit control or shutdown control can be performed. As a result, it is possible to appropriately control the implementation of the three-phase short-circuit control.

In the present embodiment, even when the first control circuit 50a performs the three-phase short-circuit control, the second control circuit 50b performs the normal drive control so that the vehicle 10 continues to run. . However, in the first control circuit 50a, the three-phase short-circuit control continues to be implemented, and a large circulating current flows in the closed circuit including the first winding 13a and the lower arm switch SWL of the first switching device section 20a, The switching device section 20a may fail. In this case, running of the vehicle 10 by the second control circuit 50b may be hindered.

Therefore, in the present embodiment, even if an abnormality occurs in the first control circuit 50a in which the execution of the three-phase short-circuit control cannot be controlled, the execution of the three-phase short-circuit control is controlled via the second microcomputer 51b. be. This makes it possible to avoid continuous execution of the three-phase short-circuit control. As a result, the running of the vehicle 10 can be continued by the normal second control circuit 50b.

<Second embodiment>
The second embodiment will be described below with reference to the drawings, focusing on differences from the first embodiment. In this embodiment, temperature determination processing is performed in addition to regeneration determination processing. In each of the embodiments below, the case where an abnormality occurs in which the first control circuit 50a of the first and second control circuits 50a and 50b cannot control the execution of the three-phase short-circuit control will be described as an example. .

In the temperature determination process, the second microcomputer 51b acquires the detected temperature Ts of the temperature sensor 41 provided in the first switching device section 20a via the first microcomputer 51a, the first transmitting section 53a and the second receiving section 54b. do. The second microcomputer 51b determines that a temperature abnormality has occurred when the acquired detected temperature Ts is higher than the predetermined temperature Tp. On the other hand, the second microcomputer 51b determines that the temperature abnormality has not occurred when the acquired detected temperature Ts is equal to or lower than the predetermined temperature Tp. In this embodiment, the second microcomputer 51b corresponds to the "temperature acquisition section".

FIG. 5 shows the procedure of processing performed by the control system. This process is repeatedly executed at a predetermined cycle. In addition, in FIG. 5, the steps shown in FIG. 4 above are denoted by the same reference numerals for convenience.

If an affirmative determination is made in step S16, the second microcomputer 51b proceeds to step S28 to perform temperature determination processing. In step S28, when the acquired detection temperature Ts is higher than the predetermined temperature Tp, the second microcomputer 51b determines that the overheating state exists, and proceeds to step S22. On the other hand, when the acquired detected temperature Ts is equal to or lower than the predetermined temperature Tp, the second microcomputer 51b determines that it is not overheated, and proceeds to step S17.

In this embodiment, when the second microcomputer 51b determines that the overheating state exists, the logic of the control signal Sg2 is set to L even if the regeneration determination process determines that power regeneration is occurring. As a result, shutdown control is performed in the first control circuit 50a. The voltage applied to the closed circuit in shutdown control is lower than the voltage applied to the closed circuit in three-phase short circuit control. Therefore, the regenerative current generated by executing the shutdown control is smaller than the circulating current generated by executing the three-phase short-circuit control. Therefore, it is possible to prevent the first inverter 15a from entering an abnormal overheating state by performing shutdown control in an overheating state.

<Third Embodiment>
The third embodiment will be described below with reference to the drawings, focusing on differences from the first embodiment. In this embodiment, as shown in FIG. 6, a reduction process is added after step S20.

In the reduction process, when the three-phase short circuit control is performed in the first control circuit 50a, the second microcomputer 51b performs control for reducing the line voltage Vemf of the first winding 13a. As control for reducing the line voltage Vemf, for example, the rotation speed of the second rotating electric machine 11b may be reduced, or the torque command value input to the second control circuit 50b may be reduced.

FIG. 6 shows the procedure of processing performed by the control system. This process is repeatedly executed at a predetermined cycle. In FIG. 6, the steps shown in FIG. 4 above are given the same reference numerals for convenience.

In step S29 after step S20, the second microcomputer 51b performs reduction processing. Thereby, in the present embodiment, the line voltage Vemf of the first winding 13a is made lower than the detection voltage VH of the second voltage detection section 64b. Therefore, the second control circuit 50b is permitted to cancel the three-phase short-circuit control and switch to shutdown control. After that, the process proceeds to step S22.

In this embodiment, when the three-phase short-circuit control is performed, the reduction process is performed. As a result, the line voltage Vemf of the first winding 13a is made lower than the detection voltage VH of the second voltage detection section 64b. Therefore, after power regeneration does not occur in the first inverter 15a and the first rotating electric machine 11a, the three-phase short-circuit control is canceled and the shutdown control is performed. As a result, it is possible to switch to the shutdown control after the three-phase short-circuit control is canceled without causing any problems. As a result, it is possible to appropriately control the implementation of the three-phase short-circuit control.

<Fourth Embodiment>
The fourth embodiment will be described below with reference to the drawings, focusing on differences from the first embodiment. In this embodiment, the control signal Sg2 is a voltage signal that can continuously change within a predetermined voltage range instead of being a binary signal of logic H and logic L, and based on this voltage signal, The implementation of three-phase short-circuit control or shutdown control and the occurrence of an abnormality in the communication line are identified and notified.

The voltage signal VSg2 of the control signal Sg2 received by the second receiver 54b will be described with reference to FIG. In this embodiment, the voltage range that the voltage signal VSg2 can take is set to a voltage range from 0V to 5V for convenience. First to third voltage thresholds V1 to V3 are set within the voltage range that the voltage signal VSg2 can take.

Specifically, when the voltage signal VSg2 becomes less than the first voltage threshold V1, it is notified that a ground fault has occurred in the communication line connecting the first transmitter 53a and the second receiver 54b. When the voltage signal VSg2 is equal to or greater than the first voltage threshold V1 and less than the second voltage threshold V2, a switching command for implementing shutdown control is notified. When the voltage signal VSg2 is equal to or higher than the second voltage threshold value V2 and less than the third voltage threshold value V3, a switching command for implementing the three-phase short-circuit control is notified. When the voltage signal VSg2 is equal to or higher than the third voltage threshold V3, it is notified that a power fault has occurred in the communication line connecting the first transmitter 53a and the second receiver 54b.

It should be noted that a disconnection of the communication line may occur, but in this case, the voltage signal VSg2 is set to be less than the first voltage threshold V1 or to be greater than or equal to the third voltage threshold V3.

When the second microcomputer 51b determines in the regeneration determination process that power regeneration will occur, the second microcomputer 51b sets the voltage signal VSg2 to the second voltage threshold value V2 or more and less than the third voltage threshold value V3 to perform three-phase short-circuit control. 2 output to the transmission unit 53b. On the other hand, when the second microcomputer 51b determines in the regeneration determination process that power regeneration does not occur, the second microcomputer 51b sets the voltage signal VSg2 to the first voltage threshold value V1 or more and less than the second voltage threshold value V2 to perform shutdown control. Output to the second transmission unit 53b.

According to this embodiment detailed above, the following effects can be obtained.

Abnormalities such as ground faults, power faults, and disconnections may occur in the communication line connecting the first transmitter 53a and the second receiver 54b. In this case, there is a possibility that the implementation of the three-phase short-circuit control cannot be properly controlled.

Therefore, in this embodiment, the control signal Sg2 is a voltage signal VSg2 in which a plurality of thresholds are set. As a result, it is possible to distinguish between the implementation of the three-phase short-circuit control or the shutdown control and the occurrence of an abnormality in the communication line, and to transmit the information. As a result, it is possible to appropriately control the execution of the three-phase short-circuit control.

When an abnormality such as a ground fault, power fault, or disconnection occurs in the communication line, the voltage signal VSg2 sticks to its lower limit value or upper limit value. In this regard, in the present embodiment, the first voltage threshold V1 is set above 0V, and the third voltage threshold V3 is set below 5V. As a result, when the voltage signal VSg2 sticks to the upper limit value or the lower limit value, it can be determined that an abnormality has occurred in the communication line. On the other hand, when the voltage signal VSg2 is controlled to an intermediate voltage equal to or higher than the first voltage threshold V1 and lower than the third voltage threshold V3, communication between the first transmitter 53a and the second receiver 54b is normally performed. It can be determined that

<Fifth Embodiment>
The fifth embodiment will be described below with reference to the drawings, focusing on differences from the first embodiment. In this embodiment, a process of determining whether or not the three-phase short-circuit control can be normally performed is performed in preparation for the occurrence of an abnormality that makes it impossible to control the three-phase short-circuit control. That is, a process of determining whether or not the upper arm switch SWH is turned off and the lower arm switch SWL is turned on by the logic H control signal Sg2 is executed.

As shown in FIG. 8, the first control circuit 50a includes a first processing section 71a. The first processing unit 71a performs confirmation processing for grasping the driving states of the switches SWH and SWL of the first switching device unit 20a. When the first processing unit 71a determines that the three-phase lower arm switch SWL is turned on and the three-phase upper arm switch SWH is turned off, as a result of the confirmation process, the first processing unit 71a generates a logic H determination signal Sgj. 1 output to the transmission unit 61a. Here, the determination signal Sgj indicates that the three-phase short-circuit control has been performed by logic H, and indicates that the three-phase short-circuit control has not been performed by logic L.

The second control circuit 50b has a second processing section 71b. The second processing unit 71b performs confirmation processing for grasping the driving states of the switches SWH and SWL of the second switching device unit 20b. When the second processing unit 71b determines that the three-phase lower arm switch SWL is turned on and the three-phase upper arm switch SWH is turned off, as a result of the confirmation process, the second processing unit 71b generates a logic H determination signal Sgj. 2 output to the transmission unit 61b.

FIG. 9 shows the procedure of processing performed by the control system. Note that this process may be performed, for example, once per trip, or may be performed each time the traveling distance of the vehicle 10 reaches a predetermined distance. Also, this process may be performed at the timing when the control system is started or stopped. A process of determining whether or not the three-phase short-circuit control can be normally performed in the first control circuit 50a will be described below.

In step S30, the second microcomputer 51b outputs a control signal Sg2 of logic H to the second transmission section 53b. In step S31, the second transmitter 53b transmits the control signal Sg2 to the first receiver 54a. In step S32, the first receiving section 54a receives the control signal Sg2 of logic H and transmits it to the first driver 70a via the third transmitting section 62a.

In step S33, the first driver 70a performs three-phase short-circuit control based on the control signal Sg2 of logic H. In step S34, the first processing unit 71a performs confirmation processing. In step S35, the first processing unit 71a generates a determination signal Sgj as a result of the confirmation process, and outputs it to the first transmission unit 53a.

In step S36, the first transmitter 53a transmits the determination signal Sgj to the second receiver 54b. In step S37, the second receiver 54b receives the determination signal Sgj and outputs it to the second microcomputer 51b.

In step S38, the second microcomputer 51b determines whether or not the input determination signal Sgj is logic high. If the second microcomputer 51b makes an affirmative determination in step S38, it proceeds to step S39 and determines that the three-phase short-circuit control can be normally performed. On the other hand, if the second microcomputer 51b makes a negative determination in step S38, it proceeds to step S40 and determines that the three-phase short-circuit control cannot be normally performed. In this embodiment, the second microcomputer 51b corresponds to the "driving determination unit".

Note that even when the first microcomputer 51a outputs the control signal Sg2 of logic H to the first transmission section 53a, the same control as the control described above is performed. In this case, the first microcomputer 51a corresponds to the "driving determination section".

According to the present embodiment, it is possible to determine whether or not the three-phase short-circuit control can be normally performed in preparation for the occurrence of an abnormality that makes it impossible to control the three-phase short-circuit control.

<Other embodiments>
It should be noted that each of the above-described embodiments may be modified as follows.

- Instead of using the rotational speed of the first rotary electric machine 11a corresponding to the first drive wheel 16a, which is the front wheel of the vehicle 10, as the regeneration determination information Nr, the second drive wheel 16b, which is the rear wheel of the vehicle 10, is used. may be used. Therefore, the second microcomputer 51b estimates the line voltage Vemf of the first winding 13a based on the regeneration determination information Nr, which is the rotation speed of the second rotating electric machine 11b. In addition, in step S14, the second microcomputer 51b may acquire the regeneration determination information Nr, which is the rotational speed of the second rotating electric machine 11b. In this embodiment, the rotational speed of the second rotating electric machine 11b corresponds to the "controlled state".

In this embodiment, the line voltage Vemf of the first winding 13a is estimated based on the rotation speed of the second rotating electric machine 11b. As a result, even in a state in which the rotation speed of the first rotating electric machine 11a cannot be obtained, the regeneration determination process can be performed. As a result, it is possible to appropriately control the implementation of the three-phase short-circuit control.

When the second driving wheel 16b is connected to the second rotating electrical machine 11b via a transmission, the first winding 13a is driven based on the gear ratio of the transmission in addition to the rotational speed of the second rotating electrical machine 11b. line voltage Vemf may be estimated.

- The regeneration determination information Nr is not limited to the rotation speed of the rotary electric machine, and may be the phase current Ir or the torque.

- The phase current Ir and the torque are set to have a predetermined distribution ratio in the first control circuit 50a and the second control circuit 50b. Therefore, for example, the line voltage Vemf of the first winding 13a may be estimated based on the phase current Ir and the distribution ratio detected by the current sensor 40 in the second control circuit 50b. In this embodiment, the phase current Ir and the torque correspond to the "controlled state".

- In the regeneration determination process, the value to be compared with the line voltage Vemf is not limited to the detected voltage VH of the second voltage detection section 64b, and may be, for example, a predetermined determination value. The determination value may be set to, for example, the minimum value within the range that the terminal voltage of the normal high-voltage power supply can take.

- In the fourth embodiment, the control signal Sg2 is the voltage signal VSg2, but in the present embodiment, the control signal Sg2 is a pulse signal. For example, in this case, information is notified as follows based on the control signal Sg2 by making the duty ratio of the pulse signal variable. When the duty ratio of the pulse signal is 0%, it is notified that a ground fault has occurred in the communication line. When the duty ratio of the pulse signal is greater than 0% and less than a predetermined duty (for example, 50%), a switching command for executing shutdown control is notified. When the duty ratio of the pulse signal is equal to or greater than a predetermined duty and less than 100%, a switching command for implementing three-phase short-circuit control is notified. When the duty ratio of the pulse signal is 100%, it is notified that a power fault has occurred in the communication line. As a result, it is possible to distinguish between the implementation of the three-phase short-circuit control or the shutdown control and the occurrence of an abnormality in the communication line, and to transmit the information.

Instead of varying the duty ratio of the pulse signal, the number of pulses of the pulse signal included in a predetermined period of time may be varied. For example, in this case, the following information is notified based on the control signal Sg2. When the pulse number of the pulse signal is 0, it is notified that a ground fault has occurred in the communication line. When the pulse number of the pulse signal is 1, a switching command for executing shutdown control is notified. When the pulse number of the pulse signal is 2, a switching command for implementing the 3-phase short-circuit control is notified. When the number of pulses of the pulse signal is 3, it is notified that a power fault has occurred in the communication line.

The number of inverters and rotating electric machines provided in the control system is not limited to two, and may be three or more. In this case, a separate control circuit may be provided for each of the three or more inverters.

The control system is not limited to the one in which the rotating electric machines are provided corresponding to the front and rear wheels of the vehicle 10, and is installed in, for example, the one in which the rotating electric machines are provided corresponding to the left driving wheels and the right driving wheels of the vehicle 10. may be Further, the rotary electric machine is not limited to one provided in the vehicle body of the vehicle, and may be, for example, an in-wheel motor built in the drive wheels.

- The control amount of the rotating electrical machine is not limited to the torque, and may be, for example, the rotation speed of the rotor of the rotating electrical machine.

- The rotary electric machine is not limited to a permanent magnet synchronous machine, and may be, for example, a winding field synchronous machine. Further, the rotating electric machine is not limited to a synchronous machine, and may be an induction machine, for example. Furthermore, the rotary electric machine is not limited to one used as a vehicle-mounted main engine, and may be one used for other purposes such as an electric power steering device or an electric motor constituting an electric compressor for air conditioning.

・Even if an abnormality occurs in the second control circuit 50b that prevents the execution of the three-phase short-circuit control, the first and second control circuits 50a and 50b perform the same control as described in the first to fourth embodiments. Control is enforced. In this case, the first microcomputer 51a corresponds to the "signal generation section" and the "regeneration determination section", the second microcomputer 51b corresponds to the "temperature acquisition section", and the second transmission section 53b corresponds to the "information transmission section". The second driver 70b corresponds to the "abnormal control unit".

- The mobile body on which the control system is mounted is not limited to the vehicle 10, and may be, for example, an aircraft or a ship. If the mobile object is an aircraft, the rotating electric machine will be the flight power source of the aircraft, and if the mobile object is a ship, the rotating electric machine will be the navigation power source of the ship. Further, the mounting destination of the control system is not limited to the mobile body.

- The switches constituting the first and second switching device sections 20a and 20b are not limited to IGBTs, and may be N-channel MOSFETs incorporating body diodes, for example.

- Two or more switches connected in parallel may be used as the switches for each phase and each arm that constitute the first and second switching device sections 20a and 20b. In this case, the combination of switches connected in parallel may be, for example, a combination of a SiC switching element and a Si switching element, or a combination of an IGBT and a MOSFET.

- The controller and techniques described in this disclosure can be performed by a dedicated computer provided by configuring a processor and memory programmed to perform one or more functions embodied by a computer program; may be implemented. Alternatively, the controls and techniques described in this disclosure may be implemented by a dedicated computer provided by configuring the processor with one or more dedicated hardware logic circuits. Alternatively, the control units and techniques described in this disclosure can be implemented by a combination of a processor and memory programmed to perform one or more functions and a processor configured by one or more hardware logic circuits. It may also be implemented by one or more dedicated computers configured. The computer program may also be stored as computer-executable instructions on a computer-readable non-transitional tangible recording medium.

11a, 11b... first and second rotating electric machines 13a, 13b... first and second windings 15a, 15b... first and second inverters 50a, 50b... first and second control circuits 51a and 51b First and second microcomputers 53a and 53b First and second transmitters 54a and 54b First and second receivers 70a and 70b First and second drivers SWH and SWL Top and bottom arm switch.

Claims (12)

multiphase rotating electric machines (11a, 11b);
A power converter applied to a system comprising a plurality of power converters (15a, 15b) having upper and lower arm switches (SWH, SWL) electrically connected to each phase winding (13) of the rotating electric machine. in the controller of
A control circuit (50a, 50b) provided individually for each power converter,
Each control circuit,
For a communication target that is a control circuit other than itself among the control circuits, the on-side switch that is the switch in one of the upper and lower arms is turned on, and the switch that is the off-side in the other arm is turned on. a signal generator (51a, 51b) that generates a control signal for short-circuit control for turning off the switch;
a signal transmission unit (53a, 53b) for transmitting the generated control signal;
a receiving unit (54a, 54b) for receiving the control signal transmitted from the signal transmitting unit to be communicated;
when the control signal for implementing the short-circuit control is received via the receiving unit, the short-circuit control is implemented, and the control signal for not implementing the short-circuit control while the short-circuit control is being implemented is received; A control device for a power converter, comprising: an abnormality time control section (70a, 70b) that cancels implementation of the short-circuit control when receiving a signal through the receiving section. The system includes a power storage unit (30) common to each power converter,
Each of the control circuits includes a regeneration determination unit (51a) that determines whether power regeneration in which current flows in a direction from the rotating electric machine side to the power storage unit side occurs in the power converter and the rotating electric machine that are the communication targets. , 51b),
The signal generation unit generates the control signal for performing the short-circuit control when it is determined that the power regeneration will occur, and does not perform the short-circuit control when it is determined that the power regeneration does not occur. 2. The power converter control device according to claim 1, which generates said control signal indicating that. The regeneration determination unit determines that the power regeneration does not occur when the terminal voltage of the power storage unit is equal to or higher than the line voltage when the back electromotive voltage is generated in the winding, and the terminal voltage of the power storage unit 3. The power converter control device according to claim 2, wherein it is determined that the power regeneration occurs when the voltage is lower than the line voltage. 4. The control device for a power converter according to claim 3, wherein the regeneration determining unit estimates the line voltage in the rotating electrical machine to be communicated with based on the control state of the rotating electrical machine of itself. each of the control circuits includes an information transmission unit (53a, 53b) that transmits the control state of the rotating electric machine corresponding to itself to the communication target;
5. The power converter according to claim 3, wherein the regeneration determination unit estimates the line voltage in the rotating electric machine corresponding to the communication target based on the control state transmitted from the information transmission unit. Control device. wherein, prior to transmitting the control signal indicating that the short-circuit control is not to be performed, the signal generation unit causes the power converter and the rotating electric machine corresponding to the communication target to transition to a state in which the power regeneration does not occur. 6. A power converter control device according to any one of items 2 to 5. each of the control circuits has a temperature acquisition unit (51a, 51b) that acquires the temperature of the on-side switch in the communication target or a temperature correlated with the temperature;
When the temperature acquired by the temperature acquiring unit of the communication target is higher than a predetermined temperature in a case where the abnormality control unit of the communication target is performing the short-circuit control, the signal generation unit detects the short-circuit The power converter control device according to any one of claims 1 to 6, which generates the control signal indicating that control is not to be performed. The abnormal control unit is provided in a high pressure region,
The signal transmission unit and the reception unit are provided in a low voltage area electrically insulated from the high voltage area,
Each of the control circuits is provided in the high-voltage region and the low-voltage region across a boundary between the low-voltage region and the high-voltage region, and electrically insulates between the low-voltage region and the high-voltage region while the reception is performed. The power converter control device according to any one of claims 1 to 7, further comprising a transmission section (62a, 62b) for transmitting the control signal from the control section to the abnormality control section. The system is provided with a low voltage power supply (31) provided in the low voltage area,
Each control circuit,
a switching command generation unit (51a, 51b) provided in the low voltage region for generating and outputting a switching command for driving and controlling the rotating electric machine;
switch drive units (70a, 70b) provided in the high voltage region, operable by power supply, and driving the switches of the upper and lower arms based on the switching command;
Insulated power supplies for driving (60a, 60b) are provided in the low voltage area and the high voltage area across the boundary between the low voltage area and the high voltage area, and are fed from the low voltage power supply to generate power to be supplied to the switch driving unit. )and,
Abnormal insulated power supplies (63a, 63b) provided in the low-voltage area and the high-voltage area across the boundary between the low-voltage area and the high-voltage area and fed from the low-voltage power supply to generate power to be supplied to the transmission unit. 9. The power converter control device according to claim 8, comprising: The signal transmission unit and the reception unit provided in the communication target are connected by a communication line,
The power converter according to any one of claims 1 to 9, wherein the control signal is a signal that can distinguish between information indicating whether or not to perform the short-circuit control and occurrence of an abnormality in the communication line. Control device. A drive determination unit (51a, 51b) that detects the drive state of the switch in the communication target and determines whether or not the short-circuit control can be performed based on the detection result,
11. The signal transmission unit according to claim 1, wherein the signal transmission unit transmits the control signal for performing the short-circuit control to the reception unit to be communicated with in order to perform the determination by the drive determination unit. A control device for the power converter according to claim 1. The system is mounted on a mobile object (10),
The rotating electric machine is a power source for moving the moving body,
The short-circuit control is performed and the short-circuit control is canceled in the power converter corresponding to the control circuit in which the abnormality has occurred among the control circuits,
12. The apparatus according to any one of claims 1 to 11, wherein switching control of said switch for continuing driving of said rotating electric machine is performed in said power converter corresponding to a control circuit in which no abnormality has occurred among said control circuits. A controller for the described power converter.

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