JP5338289B2 - Rotating electric machine drive - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an inverter control device that protects the circuit of all inverters even if the interruption signal for the inverter is activated accidentally by disconnection, or the like, in the rotary electric machine drive device with an inverter which drives a rotary electric machine such as a hybrid vehicle. <P>SOLUTION: When the fail signal FE1 or FE2 of either an inverter 2 or 3 is activated, the inverter control device 4 activates the interruption signal for the inverter other than the inverter of which the fail signal is activated simultaneously with activation of the interruption signal DWN1 or DWN2 for the inverter of which the fail signal is activated, so that the gates of both inverters 2 and 3 are interrupted simultaneously. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to a control technique for a rotating electrical machine in a vehicle including a plurality of rotating electrical machines.

  For example, there is known a hybrid vehicle that includes two rotating electric machines in addition to the engine, and connects the engine and the rotating electric machine to each other via a power split mechanism using a planetary gear mechanism to drive the wheels. In this case, the two rotating electrical machines can operate in a mode that functions as an electric motor for driving a wheel or starting an engine, or in a mode that functions as a generator during normal traveling or braking, and is provided from a power storage device. It is driven by a rotating electrical machine drive device provided with an inverter that converts a direct current into a three-phase alternating current.

  The inverter of the rotating electrical machine drive device is provided for each rotating electrical machine. When the corresponding rotating electrical machine functions as an electric motor, the direct current provided from the power storage device is converted into alternating current and provided to the rotating electrical machine. In addition, when the corresponding rotating electrical machine functions as a generator, these inverters convert the alternating current provided from the rotating electrical machine into direct current, and the direct current is provided to the power storage device or other rotational Provided to electric inverters.

  Each of such inverters is provided with an overcurrent detection circuit for the purpose of circuit protection. When an overcurrent is detected by the overcurrent detection circuit in the inverter that drives one of the rotating electrical machines, the inverter that detects the overcurrent shuts down its own gate and activates the fail signal to activate it. In accordance with the fail signal, the inverter of the other rotating electrical machine is also gated off. Thereby, it is possible to prevent the occurrence of overvoltage or overcurrent in the circuit. An inverter control device that performs such control in a rotating electrical machine drive device is described in Patent Literature 1 or Patent Literature 2.

As shown in FIG. 2 of Patent Document 1, in the power module of each inverter, an overcurrent detection circuit is provided in a drive unit (Dr1 to 6) that drives an IGBT (Insulated Gate Bipolar Transistor). When an overcurrent occurs in any one of these, the gate of the IGBT is cut off by the drive unit and the fail signal (FE1, 2) is activated. As shown in FIG. 1 of Patent Document 1, this fail signal is input to the inverter control device (70) and ANDed with the cutoff permission signal (RG1,2), and the resulting cutoff signal (DWN1,1) 2) is provided to the other inverter. The drive unit in the other inverter whose cut-off signal is activated by the activation of the fail signal executes the gate cut-off of the IGBT.
JP 2005-130615 A JP 2007-202345 A

  In the inverter control device as described above, for example, when a disconnection occurs in the signal path of the fail signal (FE2) input from the inverter (50) of the rotating electrical machine MG2 to the inverter control device (70), the fail signal (FE2 ) Are both activated (logic high), and the cutoff signal (DWN1) may be activated and output to the inverter (40) of the rotating electrical machine MG1. In this case, the inverter (40) of the rotating electrical machine MG1 performs gate shut-off according to the shut-off signal, but the inverter (50) of one rotating electrical machine MG2 does not actually generate an overcurrent, and thus continues to operate. Will do. A signal time chart for explaining this time lag is shown in FIG.

  If a failure signal input from the inverter of the rotating electrical machine MG2 to the inverter control device transitions to the activation logic high due to the occurrence of the disconnection, the disconnection signal for the inverter of the rotating electrical machine MG1 immediately transitions to the logic high. Therefore, the control of the rotating electrical machine MG1 is suppressed at this time by the gate cutoff of the inverter. However, since the signal is actually an error signal due to disconnection, the inverter of the rotating electrical machine MG2 continues to operate, and thus power consumption by the rotating electrical machine MG2 continues. Thereafter, when a power management ECU (Electronic Control Unit) that supervises the hybrid control recognizes the activation (logic high) of the fail signal (FE2), the power management ECU sends the inverter control device to the inverter of the rotating electrical machine MG2. Since the shut-off command signal is transmitted, the inverter control device changes the shut-off signal for the inverter of the rotating electrical machine MG2 to logic high through a path different from the AND gate in response to this. Since the inverter of the rotary electric machine MG2 performs gate cutoff according to the cutoff signal, the control of the rotary electric machine MG2 is suppressed at this time.

  That is, there is a time lag t between the stop of one rotating electrical machine MG1 and the stop of the other rotating electrical machine MG2. During this time lag t, a malfunction may occur in the operating inverter of the rotating electrical machine MG2. For example, when the driving condition is such that the electric power generated by the rotating electrical machine MG1 functioning as a generator is consumed by the rotating electrical machine MG2 functioning as an electric motor and traveling, the rotating electrical machine MG2 during the time lag t is satisfied. With this operation, the current brought out from the power storage device increases transiently and becomes an overcurrent (see the battery current in FIG. 7), and the fuse may be blown.

  On the contrary, a similar time lag t is also present when a disconnection occurs in the signal path of the fail signal input from the inverter of the rotating electrical machine MG1 to the inverter control device. In this case, for example, if the rotating electrical machine MG1 functions as a generator and the rotating electrical machine MG2 functions as an electric motor, the generator of the rotating electrical machine MG1 during the time lag t causes overvoltage in the inverter or overcharging of the power storage device. Can occur.

  In addition, after both shut-off signals are activated as described above, when the inverter control device determines an abnormality based on communication with the power management ECU, the shut-off permission signal transitions to an inactive logic low, Accordingly, the cutoff signal of rotating electrical machine MG1 is deactivated and becomes logic low. From this point of time, driving of the rotating electrical machine MG1 with no disconnection is allowed, and the retreat travel by the rotating electrical machine MG1 is executed. On the other hand, for the rotating electrical machine MG2 that is broken, since the shutoff command signal is continued, the logic high of the shutoff signal is maintained and control is suppressed.

  In view of the above technical background, an inverter control device that enables circuit protection of all inverters even when a cutoff signal is activated by mistake due to disconnection or the like is required in a rotating electrical machine drive device.

A rotating electrical machine driving device for a vehicle according to the present invention is:
Eclipse set between each of the plurality of rotary electric machine functioning as a motor or a generator depending on the operating conditions and the power storage device, when causing function the rotary electric machine corresponding as a motor is provided from said power storage device DC and converts the current into alternating current to the rotating electrical machine, to converts an alternating current in the case make function a corresponding said rotating electric machine as a generator provided by the rotary electric machine to DC current to said electrical storage device that the multiple inverter, an overcurrent detection circuit for detecting an overcurrent between the rotary electric machine in which the corresponding provided to each of the inverters provided in each of said inverter, blocking signal to be input is fail together to block the rotary electric machine corresponding by being activated, the overcurrent detection circuit of the inverter upon detection of overcurrent, interrupting the rotary electric machine corresponding And protection means for activating the items,
Each of the inverters is connected via a first signal path for the fail signal and a second signal path for the cutoff signal, and from any one of the plurality of inverters via the first signal path. When the input fail signal is activated, the inverter outputs the fail signal to the inverter other than the inverter activated and the fail signal activated via the second signal path. an inverter control device comprising a blocking circuit that activates a blocking signal, the including.

With regard to such an inverter control device for a rotating electrical machine drive device, in the present invention, when the fail signal of any one of the inverters is activated, the cutoff signal for the inverter activated by the fail signal is activated. the blocking signals simultaneously said fail signal as to the relative said inverter other than the inverter that is also activated Ru activated.

Alternatively, in another aspect, the inverter control device includes a disconnection detection circuit for detecting the disconnection of each of the first signal path of the respective fail signal, the blocking circuit is either the disconnection detection circuit of the inverter when the disconnection detection signal detected disconnection of Kano the first signal path is input, Ru activate the blocking signals for each of the said inverter.

Alternatively, as yet another aspect, it is monitored whether the voltage of each fail signal changes beyond a predetermined threshold, and when the voltage of any of the fail signals changes beyond the threshold to, the blocking signal for the fail signal the inverter non inverter voltage simultaneously said fail signal as activates the blocking signal changes to the inverter in which the voltage changes also Ru activated.

According to the rotating electrical machine driving equipment according to the present invention, when the fail signal is activated in one of the inverters of the plurality of rotating electrical machines, with activating the cutoff signal to the other inverter, its fail signal for the activated inverter is so as to simultaneously activate the blocking signal also. Alternatively, if the anomaly of the fail signal due to disconnection or the like is determined to have occurred, as well activates the blocking signal to the other inverter, blocking signal against the inverter with abnormal off Eru signal Are also activated at the same time.

Thus, in the present invention, activation of fail signal, if the abnormality in the signal path of the fail signal is generated, it is possible to gate blocking by immediately activates the shutdown signal to all inverters, the prior art The above-mentioned time lag t is eliminated, and circuit protection is performed in all inverters.

  FIG. 1 shows an embodiment of a rotating electrical machine drive device. This embodiment is an example applied to a hybrid vehicle provided with two rotating electrical machines MG1 and MG2 in addition to the engine E. The engine E and the rotating electrical machines MG1 and MG2 are connected via a power split mechanism T by a planetary gear mechanism. Connected to each other to drive the wheels.

  One rotating electrical machine MG1 is used as a starter when the engine E is started, and at this time functions as an electric motor (powering mode). After starting the engine, it mainly functions as a generator, and is responsible for supplying power to the other rotating electrical machine MG2 or charging the power storage device B according to the operating conditions. The other rotating electrical machine MG2 mainly functions as an electric motor after the engine is started (power running mode), and drives the wheels in accordance with operating conditions. Moreover, it functions as a generator under the driving conditions for deceleration and braking (regeneration mode), and charges the power storage device B.

  Electric power is supplied to the rotating electrical machines MG1 and MG2 from the power storage device B having an internal fuse. Between the power storage device B and the rotating electrical machines MG1 and MG2, a booster C and the rotating electrical machine drive device 1 are connected in series, and the power supply voltage of the power storage device B is boosted by the booster C to rotate the rotating electrical machine drive device. 1 and the rotating electrical machines MG1 and MG2 are driven. Booster C includes a reactor C1 and an IGBT converter C2, and boosts the power supply voltage of power storage device B. A configuration without such a booster C is also possible.

  The rotating electrical machine drive device 1 includes an inverter 2 for MG1 and an inverter 3 for MG2 provided between the booster C and the rotating electrical machines MG1 and MG2. The inverters 2 and 3 provided for each of the rotating electrical machines MG1 and MG2 use a three-phase alternating current to convert the direct current provided from the power storage device B through the booster C when the corresponding rotating electrical machines MG1 and MG2 function as an electric motor. When the corresponding rotating electrical machines MG1 and MG2 function as a generator, the alternating current provided from the rotating electrical machines MG1 and MG2 is converted into a direct current.

  Each inverter 2 and 3 is provided with IGBTs Q1 and Q2 connected in series between a high potential line and a low potential line and diodes D1 and D2 connected in parallel to the IGBTs Q1 and Q2 for each phase of U, V, and W. Have a configuration. The IGBTs Q1 and Q2 are driven by the drive units Dr1 and Dr2, respectively, and the drive units Dr1 and Dr2 are provided with an overcurrent detection circuit as described in Patent Document 1 described above. FIG. 2 shows a circuit configuration of the drive units Dr1 and Dr2.

  As shown in the figure, the drive units Dr1 and Dr2 include an NPN transistor T1 and a PNP transistor T2 that are base-controlled by the port P1 of the drive IC, and an NPN transistor T3 that is base-controlled by the shunt current of the collector-emitter currents of the IGBTs Q1 and Q2. It is equipped with. The drive IC receives the pulse width modulation (PWM) signal and the cutoff signals DWN1 and DWN2 from the inverter control device 4 at the port P4, and controls the transistors T1 and T2 through the port P1. Transistors T1 and T2 have a collector-emitter connected in series between the power supply voltage and the ground voltage, and IGBTs Q1 and Q2 are gate-controlled by the potential of the interconnection node. That is, the transistors T1 and T2 turn on the IGBTs Q1 and Q2 according to the high output of the port P1, and turn off the IGBTs Q1 and Q2 according to the low output of the port P1. The transistor T3 has a collector-emitter connected between the gates of the IGBTs Q1 and Q2 and the ground voltage. When an overcurrent flows through the IGBTs Q1 and Q2, the transistor T3 is turned on to lower the gate voltages of the IGBTs Q1 and Q2. The base of the transistor T3 is connected to the port P2 of the drive IC. When a shunt current flows and the voltage of the port P2 rises above a threshold value, the drive IC sets the port P1 to a low output, The fail signals FE1 and FE2 of P3 are activated.

  As described above, when the overcurrent detection circuit detects an overcurrent in any one of the drive units Dr1 and Dr2, the gates of the IGBTs Q1 and Q2 are cut off by the drive units Dr1 and Dr2 and the fail signals FE1 and FE2 (see FIG. 3). Is activated. The fail signal FE1 is output from the inverter 2 for MG1, and the fail signal FE2 is output from the inverter 3 for MG2. The fail signals FE1 and FE2 are input to the inverter control device 4.

  The inverter control device 4 is configured by using an ECU (Electronic Control Unit), and based on the fail signals FE1 and FE2 for each of the inverters 2 and 3, the drive units Dr1 and Dr2 are gated to shut off the inverters 2 and 3. Signals DWN1 and DWN2 (see FIG. 3) are output. The inverter control device 4 activates the corresponding shut-off signals DWN1 and DWN2 in accordance with the activation of one of the fail signals FE1 and FE2, so that the inverters 2 and 3 other than the inverters 2 and 3 that have detected the overcurrent are gate-shut off. Is done. At this time, since the inverters 2 and 3 that have detected the overcurrent are also shut off at the gate, the occurrence of overvoltage or overcurrent in the circuit can be prevented.

  Note that the drive unit that drives the IGBT of the converter C2 also has the same configuration as the drive units Dr1 and Dr2 of the inverters 2 and 3, and when the overcurrent is detected by the overcurrent detection circuit, the drive unit shuts its own gate. In addition, the fail signal may be activated.

  The inverter control device 4 communicates with the power management ECU 10 that controls the hybrid control, and controls the inverters 2 and 3 in cooperation. The power management ECU 10 cooperates with the engine ECU and the like to provide the inverter control device 4 with a rotation speed and a torque command value according to the driving situation. The inverter control device 4 outputs the output voltage value of the power storage device B, the rotating electrical machine MG1. , Output a PWM signal to the inverters 2 and 3 based on the current value of MG2, the rotational speed and the torque command value. Further, the power management ECU 10 provides a cutoff command signal to the inverter control device 4 in accordance with the operation status of the rotating electrical machines MG1 and MG2.

  FIG. 3 shows a first example of a logic circuit in the inverter control device 4.

  The inverter control device 4 includes two CPUs that perform control in cooperation with each other for MG1 and MG2, and control of the cutoff signals DWN1, DWN2, and DWNC for the inverters 2 and 3 and the converter C2 is performed by MG2. CPU is in charge. These CPUs receive fail signals FE1 and FE2 from inverters 2 and 3, respectively. The fail signal FE1 is a fail signal input from the inverter 2 of the rotating electrical machine MG1, and the fail signal FE2 is a fail signal input from the inverter 3 of the rotating electrical machine MG2.

  In addition, there is also a shut-off signal DWNH output directly from the power management ECU 10 to the inverters 2 and 3. When the shut-off signal DWNH is activated, both inverters 2 and 3 are gate-shut off immediately.

  As described above, the fail signals FE1 and FE2 activated by the overcurrent detection in the inverters 2 and 3 are ANDed with the cutoff permission signal RGI activated (logic high) by the CPU in accordance with the operation state. The cutoff permission signal RGI is a signal that is always activated during normal operation after engine startup. In the first example, unlike the conventional case, as indicated by the dotted line, when the fail signal FE1 of the inverter 2 is activated while the cutoff permission signal RGI is active, the inverter 2 itself simultaneously with the cutoff signal DWN2 of the inverter 3 The blocking signal DWN1 is also activated. Further, if the fail signal FE2 of the inverter 3 is activated while the cutoff permission signal RGI is activated, the cutoff signal DWN2 of the inverter 3 itself is also activated simultaneously with the cutoff signal DWN1 of the inverter 2. That is, when the fail signals FE1 and FE2 are activated in the inverters 2 and 3 of one of the rotating electrical machines MG1 and MG2, the inverter control device 4 activates the cutoff signals DWN1 and DWN2 for both inverters 2 and 3 at the same time. . As a result, even if the failure signals FE1 and FE2 in the active state occur due to disconnection or the like, the shut-off signals of all the inverters 2 and 3 can be immediately activated to shut off the gates. The above-mentioned time lag t (FIG. 7) is eliminated, and circuit protection is performed in all inverters. About this, the signal time chart is shown in FIG.

  The time chart of FIG. 4 shows an operating condition in which the electric power generated by the rotating electrical machine MG1 functioning as the generator is consumed by the rotating electrical machine MG2 functioning as the electric motor, that is, the rotating electrical machine MG1. The signal of the fail signal FE2 input from the inverter 3 of the rotating electrical machine MG2 to the inverter control device 4 under an operating condition in which the rotating electrical machine MG2 outputs a constant torque using the power generated by the power generation and power storage device B. It is an example when a disconnection occurs in the route. When the disconnection occurs in the signal path, the fail signal FE2 transitions to a logic high, so that a logic high is output from an AND gate that performs a logic operation on the fail signal FE2. Then, in response to this, the cutoff signal DWN1 for the inverter 2 of the rotating electrical machine MG1 is immediately activated to logic high, and at the same time, the cutoff signal DWN2 for the inverter 3 of the rotating electrical machine MG2 is immediately activated to logic high. Therefore, at this time, the inverters 2 and 3 of both the rotary electric machines MG1 and MG2 are both gate-cut off, so that the time lag t in FIG. 7 is eliminated and a sudden increase in battery current is prevented.

  Thereafter, the power management ECU 10 that recognizes the activation of the fail signal FE2 transmits a cutoff command signal to the inverter 3 of the rotating electrical machine MG2 to the inverter control device 4. Accordingly, the CPU of the inverter control device 4 activates the cutoff command signal dwn2 for the inverter 3 of the rotating electrical machine MG2 to logic high. The shut-off command signals dwn1, dwn2, and dwnC output from the MG2 CPU are signals activated in accordance with the shut-off command signal received from the power management ECU 10. When the shut-off command signal dwn1 is activated, the shut-off command signal dwn1 is shut off. When signal DWN1 is activated on a different path from the AND gate and cutoff command signal dwn2 is activated, cutoff signal DWN2 for inverter 3 is activated on a different path from the AND gate. Further, when the cutoff command signal dwnC is activated, the cutoff signal DWNC for the converter C2 is activated.

  After both shut-off signals DWN1 and DWN2 are activated as described above, when the inverter control device 4 determines an abnormality based on communication with the power management ECU 10, the shut-off permission signal RGI transitions to an inactive logic low. Accordingly, the cutoff signal DWN1 of the rotating electrical machine MG1 is deactivated and becomes logic low. From this point of time, driving of the rotating electrical machine MG1 with no disconnection is allowed, and the retreat travel by the rotating electrical machine MG1 is executed. On the other hand, for the rotating electrical machine MG2 that is broken, the activation of the shutoff command signal dwn2 is continued according to the shutoff command signal, so that the activation of the shutoff signal DWN2 is maintained and the control is suppressed.

  FIG. 5 shows a second example of the inverter control device 4. The second example is different from the first example in that a disconnection detection circuit 41 is provided in the inverter control device 4. However, in the second example, an example in which the disconnection detection circuit 41 is provided in the inverter control device 4 in the first example is shown. However, when the disconnection detection circuit 41 is provided, the fail signals FE1, FE2 are provided as in the first example. It is not always necessary to input the AND operation result to both inverters 2 and 3.

  In the second example, only the part of the disconnection detection circuit 41 that is different from the first example will be described. The disconnection detection circuit 41 is provided in the inverter control device 4 to detect disconnection of the input signal path of the fail signals FE1 and FE2. ing. Specifically, as shown in FIG. 6A, the disconnection detection circuit 41 determines whether or not the signal voltage changes beyond a predetermined threshold th in the signal paths of the fail signals FE1 and FE2. It is an electric circuit that detects the amount of change. The threshold th in this example is set to a level higher than the logic high voltage of the fail signals FE1 and FE2. That is, the circuit is configured to detect an abnormal voltage (ΔV at the time of disconnection) of a signal that exceeds the logic high voltage (ΔV) when the ground path is lost due to the disconnection of the signal path.

  When the disconnection detection circuit 41 detects a signal path disconnection of any one of the fail signals FE1 and FE2, the cutoff signals DWN1 and DWN2 for both the inverters 2 and 3 are simultaneously activated as shown by the dotted lines in FIG. 2 and 3 are gated off. That is, for example, if the signal path disconnection of the fail signal FE2 is detected, the inverter control device 4 activates the cutoff signal DWN2 for the inverter 3 in which the signal path disconnection is detected, and at the same time, the inverter in which the signal path disconnection is detected. The cutoff signal DWN1 for the inverters 2 other than 3 is also activated. Therefore, circuit protection is performed in all inverters.

  Control similar to that of the disconnection detection circuit 41 can be executed by software in the CPU. FIG. 6B shows a flowchart of the inverter control device 4 of the third example.

  For example, in the inverter control device 4 shown in FIG. 3, the CPU for MG1 and MG2 monitors the voltage change of the fail signals FE1, FE2, in this example, whether the signal voltage is activated to logic high. (Step S1). When the CPU confirms that any of the fail signals FE1 and FE2 is activated, whether or not the voltage change exceeds the threshold th shown in FIG. The amount is determined (step S2). Subsequently, when the CPU determines that the signal voltage has changed beyond the threshold value th in the determination, the CPU activates the shut-off command signals dwn1 and dwn2 for both the inverters 2 and 3, and the shut-off signal DWN1 and DWN2 are activated (step S3). That is, for example, when the voltage of the fail signal FE2 changes beyond the threshold th, the interrupt signal DWN2 for the inverter 3 whose voltage of the fail signal FE2 has changed is activated, and at the same time, the inverter of which the voltage of the fail signal FE2 has changed The cutoff signal DWN1 for the inverters 2 other than 3 is also activated. Therefore, circuit protection is performed in all inverters.

  In the case of the third example as well, the configuration for inputting the AND operation results of the fail signals FE1 and FE2 to both the inverters 2 and 3 as in the first example is not necessarily required.

  In the case of the first example, regardless of whether or not there is a disconnection, the gate cut-off of all the inverters 2 and 3 is always executed when any of the fail signals FE1 and FE2 is activated. On the other hand, in the second and third examples, since the disconnection of the fail signal path is detected, it is possible to control the gates of all the inverters 2 and 3 to be shut down only when the disconnection occurs. It is also possible in some cases to separate normal control and disconnection control.

1 is a circuit diagram showing an embodiment of a rotating electrical machine driving device according to the present invention. The circuit diagram which showed the detail of the drive part shown in FIG. FIG. 2 is a logic circuit diagram showing a first configuration example of the inverter control device shown in FIG. 1. The time chart which showed the signal state when the signal path | route disconnection of a fail signal generate | occur | produced in the inverter control apparatus of FIG. The logic circuit figure which showed the 2nd structural example of the inverter control apparatus shown in FIG. (A) is explanatory drawing which illustrated about the threshold value which the disconnection detection circuit of FIG. 5 detects a disconnection, (B) is the flowchart which illustrated about the disconnection detection process performed in CPU of FIG. The time chart which showed the signal state when the signal path | route disconnection of a fail signal generate | occur | produced in the inverter control apparatus which concerns on a prior art.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Rotating electrical machinery drive device 2 MG1 inverter 3 MG2 inverter 4 Inverter control device 41 Disconnection detection circuit FE1, FE2 Fail signal DWN1, DWN2 Breaking signal MG1, MG2 Rotating electrical machinery B Power storage device Dr1, Dr2 Drive unit (overcurrent detection circuit)

Claims (4)

Eclipse set between each of the plurality of rotary electric machine functioning as a motor or a generator depending on the operating conditions and the power storage device, when causing function the rotary electric machine corresponding as a motor is provided from said power storage device DC and converts the current into alternating current to the rotating electrical machine, to converts an alternating current in the case make function a corresponding said rotating electric machine as a generator provided by the rotary electric machine to DC current to said electrical storage device and a double speed of the inverter that,
An overcurrent detection circuit for detecting an overcurrent between the rotary electric machine in which the corresponding provided to each of the inverters,
Provided in each of the inverters, when the input cutoff signal is activated to shut down the corresponding rotating electric machine, and when the overcurrent detection circuit of the inverter detects an overcurrent , the corresponding rotation Protection means for shutting off the electric machine and activating the fail signal ;
Connected between each of said inverter through a second signal path of the first signal path and the blocking signal of the fail signal, via the first signal path from one of the plurality of inverters Neu deviation when the fail signal to be input is activated Te, for each of inverter other than the inverter that the inverter and the fail signal to which the fail signal is activated is activated, via the second signal path output An inverter control device comprising a cutoff circuit for activating the cutoff signal
A rotating electrical machine drive device. The inverter control device
Includes a disconnection detecting circuit for detecting the disconnection of each of the first signal path of the respective fail signal,
The breaker circuit activates the breaker signal for each of the inverters when a breakage detection signal is input by the breaker detection circuit that detects a break in the first signal path of any of the inverters. ,
The rotating electrical machine drive device according to claim 1. The disconnection detection circuit is
The disconnection detection signal is output to the blocking circuit when the voltage of the first signal path was e Yue a predetermined threshold value,
The rotating electrical machine drive device according to claim 2. A DC current provided from each of the plurality of rotating electrical machines that function as an electric motor or a generator according to the operating conditions and the power storage device, and when the corresponding rotating electrical machine functions as an electric motor, is provided from the power storage device Is converted into alternating current and output to the rotating electrical machine, and when the corresponding rotating electrical machine functions as a generator, the alternating current supplied from the rotating electrical machine is converted into direct current and output to the power storage device. An inverter of
An overcurrent detection circuit that is provided in each of the inverters and detects an overcurrent between the corresponding rotating electrical machines;
Provided in each of the inverters, when the input cutoff signal is activated to shut down the corresponding rotating electric machine, and when the overcurrent detection circuit of the inverter detects an overcurrent, the corresponding rotation Protection means for shutting off the electric machine and activating the fail signal;
The inverters are connected to each other via a first signal path of the fail signal and a second signal path of the cutoff signal, and a disconnection in each of the first signal paths of the fail signals is detected. The disconnection detection circuit, and when the disconnection detection signal that the disconnection detection circuit detects the disconnection of the first signal path of any of the inverters is input, for each of the plurality of inverters , the second an inverter control device comprising a blocking circuit for activating the blocking signal output via signal path,
A rotating electrical machine drive device.

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