JP6589848B2 - Diagnostic equipment - Google Patents

Description

  The present invention relates to a diagnostic apparatus and a diagnostic method applied to a system including a rotating electrical machine.

  Conventionally, for example, as seen in Patent Document 1 below, an armature energization circuit that is driven to flow an armature current through an armature winding of a rotating electrical machine, and a field current that flows through a field winding of the rotating electrical machine There is known a system including a field energization circuit that is driven for this purpose.

International Publication No. 2013/171833

  In order to increase the reliability of the operation of the system, a technique capable of diagnosing the presence / absence of an abnormality in at least one of the armature energizing circuit and the field energizing circuit constituting the system is required.

  The main object of the present invention is to provide a diagnostic device capable of diagnosing the presence or absence of an abnormality related to at least one of an armature energization circuit and a field energization circuit.

  The first configuration includes a rotating electric machine (30) having an armature winding (35U to 35W) and a field winding (32), and an armature driven to pass an armature current through the armature winding. The present invention is applied to a system including an energization circuit (51) and a field energization circuit (52) driven to cause a field current to flow through the field winding. As a combination of the field current and the armature current that makes the generated torque of the rotating electrical machine equal to or less than the torque threshold, a field side threshold that is the threshold of the field current and an armature side that is the threshold of the armature current A threshold is set. The first configuration includes a drive unit (87 to 89) that drives at least one of the armature energization circuit and the field energization circuit, the field current is set to be larger than the field-side threshold, and the A field side diagnosis process for diagnosing an abnormality related to the field energization circuit based on the field current in a state where the armature current is driven by the drive unit so as to be equal to or less than the armature side threshold; The armature energization is performed based on the armature current in a state where the drive current is set so that the field current is equal to or less than the field-side threshold and the armature current is larger than the armature-side threshold. A diagnosis unit (90) that performs at least one of the armature side diagnosis processing for diagnosing an abnormality related to the circuit.

  In the first configuration, the diagnosis unit performs at least one of the field side diagnosis process and the armature side diagnosis process.

  The field side diagnosis process will be described. This diagnosis process is a process for diagnosing an abnormality related to the field energization circuit based on the field current. For this reason, it is necessary to pass a field current for diagnosis through the field winding. Here, for example, when a field current is passed through the field winding while an armature current is flowing through the armature winding, the rotating electrical machine can generate torque. When the generated torque of the rotating electrical machine is large, inconveniences such as giving a sense of discomfort to the user who uses the system may occur.

  Therefore, in the first configuration, as a combination of the field current and the armature current that causes the generated torque of the rotating electric machine to be equal to or less than the torque threshold, the field-side threshold that is the field current threshold and the electric machine that is the armature current threshold. A child-side threshold is set. In the state where the diagnosis unit is driven by the drive unit so that the field current is larger than the field side threshold and the armature current is equal to or less than the armature side threshold as the field side diagnosis processing, A process for diagnosing an abnormality related to the field energization circuit based on the current is performed. According to the first configuration, even if a diagnostic field current is flowing, the armature current is set to be equal to or less than the armature side threshold value, so that the torque generated by the rotating electrical machine can be set to be equal to or less than the torque threshold value. For this reason, at the time of abnormality diagnosis regarding a field energization circuit, generation | occurrence | production of inconveniences, such as giving an uncomfortable feeling to the user using a system, can be suppressed.

  On the other hand, the armature-side diagnosis process will be described. This diagnosis process is a process for diagnosing an abnormality related to the armature energization circuit based on the armature current. For this reason, it is necessary to pass a diagnostic armature current through the armature winding. Here, for example, when an armature current is passed through the armature winding while a field current is flowing through the field winding, the rotating electrical machine can generate torque. When the generated torque of the rotating electrical machine is large, inconveniences such as giving a sense of discomfort to the user who uses the system may occur.

  Therefore, in the first configuration, the diagnosis unit is driven by the drive unit as the armature-side diagnosis process so that the field current is equal to or less than the field-side threshold and the armature current is larger than the armature-side threshold. In the state, processing for diagnosing an abnormality related to the armature energization circuit is performed based on the armature current. According to the first configuration, even if a diagnostic armature current flows, the field current is set to be equal to or less than the field-side threshold value, and thus the torque generated by the rotating electrical machine can be set to be equal to or less than the torque threshold value. For this reason, at the time of abnormality diagnosis regarding the armature energization circuit, it is possible to suppress the occurrence of inconvenience such as giving a user a sense of discomfort.

  In the second configuration, the diagnosis unit performs the armature-side diagnosis process after the field-side diagnosis process is completed, and the drive unit receives the field current after the field-side diagnosis process is completed. The armature energization circuit and the field energization circuit are configured to increase the armature current toward the armature side threshold at a time when the armature current decreases to a predetermined value that is greater than 0 and less than or equal to the field side threshold. To drive.

  In the second configuration, the diagnosis unit performs the armature side diagnosis process after the completion of the field side diagnosis process. In order to perform the armature side diagnosis process, it is necessary to make the armature current that is equal to or smaller than the armature side threshold value larger than the armature side threshold value. Here, in the second configuration, after the completion of the field side diagnosis process, the drive unit supplies the armature current to the armature at a timing when the field current decreases to a predetermined value that is greater than 0 and equal to or less than the field side threshold. Increase towards the side threshold. For this reason, the timing at which the armature current becomes larger than the armature-side threshold is advanced compared to the configuration in which the armature current is increased toward the armature-side threshold at the timing when the field current is reduced to zero. Can do. As a result, the timing for starting the armature-side diagnosis process can be advanced, and as a result, the time required from the start of the field-side diagnosis process to the completion of the armature-side diagnosis process can be shortened.

  In the third configuration, the diagnosis unit performs the field side diagnosis process after the armature side diagnosis process is completed, and the drive unit performs the armature current check after the armature side diagnosis process is completed. The armature energization circuit and the field energization circuit are configured to increase the field current toward the field-side threshold at a timing of decreasing to a predetermined value that is greater than 0 and less than or equal to the armature-side threshold. To drive.

  In the third configuration, the diagnosis unit performs the field side diagnosis process after the armature side diagnosis process is completed. In order to perform the field side diagnosis processing, it is necessary to make the field current that is equal to or less than the field side threshold value larger than the field side threshold value. Here, in the third configuration, after the armature-side diagnosis process is completed, the drive unit calculates the field current at a timing at which the armature current decreases to a predetermined value that is greater than 0 and equal to or less than the armature-side threshold. Increase towards the side threshold. For this reason, the timing at which the field current becomes larger than the field-side threshold is advanced compared to the configuration in which the field current is increased toward the field-side threshold at the timing when the armature current is reduced to zero. Can do. As a result, the timing for starting the field side diagnosis process can be advanced, and as a result, the time required from the start of the armature side diagnosis process to the completion of the field side diagnosis process can be shortened.

  In the fourth configuration, the diagnosis unit performs the armature side diagnosis process after the completion of the field side diagnosis process, and the drive unit performs the operation of the electric machine when the field side diagnosis process is performed. The armature current is maintained at 0, and the armature current is increased toward the armature-side threshold at the timing when the field current decreases to 0 after completion of the field side diagnosis process. The armature energization circuit and the field energization circuit are driven.

  In the fourth configuration, the diagnosis unit performs the armature side diagnosis process after the completion of the field side diagnosis process. In order to perform the armature side diagnosis process, it is necessary to make the armature current that is equal to or smaller than the armature side threshold value larger than the armature side threshold value. Here, in the fourth configuration, the drive unit maintains the armature current at 0 when the field side diagnosis process is performed. The drive unit increases the armature current toward the armature side threshold at the timing when the field current decreases to zero after the completion of the field side diagnosis process. According to the fourth configuration, either the armature current or the field current is set to 0 in the period from the start of the field side diagnosis process to the completion of the armature side diagnosis process. For this reason, the torque generated by the rotating electrical machine can be reduced to zero during the period from the start of the field side diagnosis process to the completion of the armature side diagnosis process. Thereby, generation | occurrence | production of inconveniences, such as giving a discomfort to the user who uses a system, can be suppressed suitably.

  In the fifth configuration, the diagnosis unit performs the field-side diagnosis process after the armature-side diagnosis process is completed, and the drive unit performs the field operation when the armature-side diagnosis process is performed. The magnetic current is maintained at 0, and after the armature side diagnosis process is completed, the field current is increased toward the field side threshold at a timing when the armature current decreases to 0. The armature energization circuit and the field energization circuit are driven.

  In the fifth configuration, the diagnosis unit performs the field side diagnosis process after the armature side diagnosis process is completed. In order to perform the field side diagnosis processing, it is necessary to make the field current that is equal to or less than the field side threshold value larger than the field side threshold value. Here, in the fifth configuration, the drive unit maintains the field current at 0 when the armature-side diagnosis process is performed. The drive unit increases the field current toward the field-side threshold at the timing when the armature current decreases to zero after the armature-side diagnosis process is completed. According to the fifth configuration, either the field current or the armature current is set to 0 in the period from the start of the armature side diagnosis process to the completion of the field side diagnosis process. For this reason, the torque generated by the rotating electrical machine can be reduced to zero during the period from the start of the armature side diagnosis process to the completion of the field side diagnosis process. Thereby, generation | occurrence | production of inconveniences, such as giving a strange feeling to the user who uses a system, can be suppressed suitably.

  In the second to fifth configurations, the q-axis current of the rotating electrical machine can be used as the armature current in the diagnosis unit and the drive unit as in the sixth configuration.

  In the seventh configuration, the drive unit drives the armature energization circuit so that the d-axis current or the q-axis current of the rotating electrical machine is zero when the armature current is passed.

  According to the seventh configuration, the reluctance torque generated by the rotating electrical machine can be reduced to zero. For this reason, the generated torque of the rotating electrical machine at the time of diagnosis can be suppressed, and the occurrence of inconveniences such as giving a sense of discomfort to the user who uses the system can be preferably suppressed.

  In the eighth configuration of the present disclosure, the drive unit causes the field current to demagnetize the magnetized field portion (32) of the rotating electrical machine when the armature-side diagnosis process is performed. Thus, the field energization circuit is driven.

  When armature-side diagnosis processing is performed, if the field winding is magnetized, the field energization circuit is driven so that the field current is less than the field-side threshold value. The generated torque of the electric machine can be larger than the torque threshold. Therefore, in the eighth configuration, when the armature-side diagnosis process is performed, the drive unit drives the field energization circuit so as to flow a field current for demagnetizing the magnetized field unit of the rotating electrical machine. . Thereby, when the armature side diagnosis process is performed, it is possible to prevent the torque generated by the rotating electrical machine from becoming larger than the torque threshold.

  The ninth configuration is applied to a vehicle, and the vehicle includes an engine (10) as a driving power source. In the ninth configuration, the rotor is connected to the output shaft so that the rotor (31) of the rotating electrical machine and the output shaft (10a) of the engine can always transmit power.

  In the ninth configuration, the rotor is connected to the output shaft so that the rotor of the rotating electrical machine and the output shaft of the engine can always transmit power. For this reason, for example, when field-side diagnosis processing is performed, if torque is generated in the rotating electrical machine by flowing a field current, inconveniences such as a sense of discomfort to the vehicle user are likely to occur. Further, for example, when the armature-side diagnosis process is performed, if torque is generated in the rotating electrical machine by flowing an armature current, inconveniences such as a sense of discomfort to the vehicle user are likely to occur. Thus, in the ninth configuration in which the above inconvenience is likely to occur, there is a great merit that a diagnosis unit and a drive unit that can reduce the torque generated by the rotating electrical machine to a torque threshold value or less at the time of diagnosis are provided.

  Specifically, as the torque threshold value, for example, as in the tenth configuration, even if the rotating electrical machine generates torque in the stop state of the vehicle, the vibration of the vehicle caused by the torque is It can be set to a value that is not experienced by the user.

The figure which shows the whole structure of the vehicle-mounted system which concerns on 1st Embodiment. The figure which shows the drive state of the field energization circuit at the time of excitation. The flowchart which shows the procedure of an abnormality diagnosis process. The figure which shows an example of the drive state of the armature energization circuit at the time of an armature side diagnostic process. The time chart which shows the procedure of abnormality diagnosis processing. The flowchart which shows the procedure of the abnormality diagnosis process which concerns on 2nd Embodiment. The time chart which shows the procedure of abnormality diagnosis processing. The flowchart which shows the procedure of the abnormality diagnosis process which concerns on 3rd Embodiment. The time chart which shows the procedure of abnormality diagnosis processing. The flowchart which shows the procedure of the abnormality diagnosis process which concerns on 4th Embodiment. The time chart which shows the procedure of abnormality diagnosis processing. The flowchart which shows the procedure of the abnormality diagnosis process which concerns on 5th Embodiment. The flowchart which shows the procedure of the abnormality diagnosis process which concerns on 6th Embodiment. The flowchart which shows the procedure of the abnormality diagnosis process which concerns on 7th Embodiment. The figure which shows the drive state of the field energization circuit at the time of demagnetization.

(First embodiment)
Hereinafter, a first embodiment in which a diagnostic device according to the present invention is applied to a vehicle equipped with an engine as a driving power source of the vehicle will be described with reference to the drawings.

  As shown in FIG. 1, the vehicle includes an engine 10 as an in-vehicle main machine, a starter 11, and a battery 20 as a DC power source. The engine 10 includes a fuel injection valve or the like, and generates power by combustion of fuel such as gasoline or light oil injected from the fuel injection valve. The generated power is output from the output shaft 10a of the engine 10.

  The starter 11 is driven by being supplied with power from the battery 20, thereby applying initial rotation to the output shaft 10 a in order to start the engine 10. The starter 11 is constituted by a DC motor, for example.

  The vehicle includes a rotating electrical machine 30 that is AC driven. In the present embodiment, a winding field synchronous machine is used as the rotating electrical machine 30. In this embodiment, a salient pole machine is used as the rotating electrical machine 30. Furthermore, in this embodiment, an ISG (Integrated Starter Generator) that is a generator to which a function of an electric motor is added is used as the rotating electrical machine 30.

  The rotating electrical machine 30 includes a rotor 31. The rotor 31 includes a field winding 32 and a permanent magnet 33. A first pulley 40 is connected to the rotation shaft 31 a of the rotor 31, and a second pulley 41 is connected to the output shaft 10 a of the engine 10. The first pulley 40 and the second pulley 41 are always connected by a belt 42. When the rotating electrical machine 30 is driven as a generator, the rotor 31 is rotated by the rotational power supplied from the output shaft 10a, and the rotating electrical machine 30 generates power. The battery 20 is charged by the electric power generated by the rotating electrical machine 30. On the other hand, when the rotating electrical machine 30 is driven as an electric motor, the output shaft 10a rotates as the rotor 31 rotates, and a rotational force is applied to the output shaft 10a. Thereby, for example, traveling of the vehicle can be assisted.

  Drive wheels 43 are mechanically connected to the output shaft 10a via a transmission (not shown) or the like.

  The rotating electrical machine 30 includes a stator 34. The stator 34 includes U, V, and W phase windings 35U, 35V, and 35W that are arranged with an electrical angle shifted by 120 ° from each other.

  The ISG includes an energization circuit unit 50. The energization circuit unit 50 includes an armature energization circuit 51 and a field energization circuit 52.

  In the present embodiment, the armature energization circuit 51 is a three-phase inverter. The armature energization circuit 51 includes a series connection body of U, V, W phase upper arm switches SUp, SVp, SWp and U, V, W phase lower arm switches SUn, SVn, SWn. The connection points PU, PV, PW between the U, V, W phase upper arm switches SUp, SVp, SWp and the U, V, W phase lower arm switches SUn, SVn, SWn have U, V, W phase windings. The first ends of 35U, 35V, and 35W are connected. The second ends of the U, V, and W phase windings 35U, 35V, and 35W are connected at a neutral point. That is, in this embodiment, the U, V, and W phase windings 35U, 35V, and 35W are star-connected. In the present embodiment, N-channel MOSFETs are used as the arm switches SUp to SWn. In addition, a parasitic diode (not shown) is connected in parallel to each of the arm switches SUp to SWn.

  The positive terminal of the battery 20 is connected to the drain which is the high potential side terminal of the U, V, W phase upper arm switches SUp, SVp, SWp. The negative terminal of the battery 20 is connected to the source which is the low potential side terminal of the U, V, W phase lower arm switches SUn, SVn, SWn. The energization circuit unit 50 includes a capacitor 53 connected in parallel to the battery 20.

  The field energizing circuit 52 includes a series connection body of the first upper arm switch SH1 and the first lower arm switch SL1, and a series connection body of the second upper arm switch SH2 and the second lower arm switch SL2. A first end of the field winding 32 is connected to a connection point between the first upper arm switch SH1 and the first lower arm switch SL1 via a brush (not shown). A second end of the field winding 32 is connected to a connection point between the second upper arm switch SH2 and the second lower arm switch SL2 via a brush (not shown). In this embodiment, N-channel MOSFETs are used as the arm switches SH1, SL1, SH2, and SL2. In addition, a parasitic diode (not shown) is connected in parallel to each arm switch SH1, SL1, SH2, SL2.

  The positive terminal of the battery 20 is connected to the drain which is the high potential side terminal of the first and second upper arm switches SH1, SH2. The negative terminal of the battery 20 is connected to the source which is the low potential side terminal of the first and second lower arm switches SL1, SL2.

  The ISG includes a control device 60. The control device 60 includes a wakeup device 70 and a processing unit 80. The processing unit 80 includes a power supply unit 81, an interface unit 82, a voltage acquisition unit 83, an armature current acquisition unit 84, a field current acquisition unit 85, a magnetic field detection unit 86, a calculation unit 87, an armature drive unit 88, and a field drive. The unit 89 and the diagnosis unit 90 are provided. In the present embodiment, the power supply unit 81 supplies the power of the battery 20 to components other than the power supply unit 81 in the processing unit 80.

  The wake-up device 70 is a device for activating the processing unit 80 when it is determined that an activation instruction for the processing unit 80 has been issued. If the wakeup device 70 determines that an activation instruction has been issued, the wakeup device 70 outputs a power supply permission signal to the power supply unit 81 configuring the processing unit 80. On the other hand, when it is determined that the activation instruction has not been issued, the wakeup device 70 stops outputting the power supply permission signal to the power supply unit 81.

  When the power supply unit 81 determines that the power supply permission signal is not output from the wakeup device 70, the interface unit 82, the voltage acquisition unit 83, the armature current acquisition unit 84, the field current acquisition unit 85, and the magnetic field detection unit 86. The power supply to the calculation unit 87, the armature drive unit 88, the field drive unit 89, and the diagnosis unit 90 is stopped. On the other hand, when the power supply unit 81 determines that the power supply permission signal is output, the interface unit 82, the voltage acquisition unit 83, the armature current acquisition unit 84, the field current acquisition unit 85, the magnetic field detection unit 86, and the calculation unit. 87, the armature drive unit 88, the field drive unit 89, and the diagnosis unit 90 are fed. Thereby, the interface unit 82, the voltage acquisition unit 83, the armature current acquisition unit 84, the field current acquisition unit 85, the magnetic field detection unit 86, the calculation unit 87, the armature drive unit 88, the field drive unit 89, and the diagnosis unit 90. Begins to work.

  The interface unit 82 acquires a drive command input from the outside of the control device 60, and outputs the acquired drive command to the calculation unit 87.

  The voltage acquisition unit 83 acquires the output voltage of the battery 20 as the power supply voltage VB.

  The armature current acquisition unit 84 acquires the phase current flowing through the U, V, and W phase windings 35U, 35V, and 35W. In the present embodiment, the armature current acquisition unit 84 acquires the U-phase current IU based on the voltage drop amount of the shunt resistor connected to the source side of the U-phase lower arm switch SUn, and the V-phase lower arm switch SVn. The V-phase current IV is obtained based on the voltage drop amount of the shunt resistor connected to the source side, and the W-phase current is obtained based on the voltage drop amount of the shunt resistor connected to the source side of the W-phase lower arm switch SWn. To do.

  The field current acquisition unit 85 acquires a field current flowing through the field winding 32. In the present embodiment, the field current acquisition unit 85 is connected to the field current IF1 based on the voltage drop amount of the shunt resistor connected to the source side of the first lower arm switch SL1 or the source side of the second lower arm switch SL2. The field current IF2 based on the voltage drop amount of the shunt resistor thus obtained is acquired.

  The values acquired by the voltage acquisition unit 83, the armature current acquisition unit 84, and the field current acquisition unit 85 are input to the calculation unit 87 and the diagnosis unit 90.

  In the present embodiment, a magnetic field rotation angle sensor is used as the magnetic field detector 86. The magnetic field type rotation angle sensor includes an IC and a hall sensor built in the IC. The IC is flat and rectangular. The magnetic field detector 86 detects the magnetic flux of the permanent magnet 33 that rotates integrally with the rotor 31. The permanent magnet 33 has a disk shape, for example. For example, the permanent magnet 33 is provided at the tip of the rotating shaft 31a of the rotor 31 so as to face the IC while being separated from the IC. The IC calculates and outputs an angle signal of the rotor 31 based on the detected magnetic field. The angle signal output from the magnetic field detection unit 86 is input to the calculation unit 87 and the diagnosis unit 90.

  The calculation unit 87 generates a drive signal for each switch constituting the armature energization circuit 51 and the field energization circuit 52 on condition that the drive command from the interface unit 82 is input.

  First, the armature energization circuit 51 will be described. The calculation unit 87 acquires the angle signal output from the magnetic field detection unit 86. Based on the acquired angle signal, the calculation unit 87 generates a drive signal for turning on / off the switches SUp to SWn constituting the armature energization circuit 51 in order to drive the rotating electrical machine 30. Specifically, when driving the rotary electric machine 30 as an electric motor, the arithmetic unit 87 converts the DC power output from the battery 20 into AC power and supplies it to the U, V, and W phase windings 35U, 35V, and 35W. Then, a drive signal for turning on and off each of the arm switches SUp to SWn is generated. On the other hand, when the rotating electrical machine 30 is driven as a generator, the calculation unit 87 converts the AC power output from the U, V, and W phase windings 35U, 35V, and 35W into DC power and supplies it to the battery 20. Then, a drive signal for turning on and off each of the arm switches SUp to SWn is generated. The generated drive signal is input to the armature drive unit 88. The armature drive unit 88 turns on / off each arm switch SUp to SWn based on the input drive signal.

  Next, the field energization circuit 52 will be described. The arithmetic unit 87 turns on and off each switch constituting the field energization circuit 52 to excite the field winding 32. Specifically, as shown in FIG. 2, the arithmetic unit 87 generates a drive signal for alternately turning on the first upper arm switch SH1 and the first lower arm switch SL1, and turns off the second upper arm switch SH2. A drive signal is generated to maintain and maintain the second lower arm switch SL2 on. The calculation unit 87 uses a duty ratio Duty (= Ton / Tsw), which is a ratio of the on-time Ton to one switching cycle Tsw of the first upper arm switch SH1, based on a command value of a field current flowing through the field winding 32. To set. The duty ratio Duty is set to a larger value as the field current command value is larger. The drive signal generated by the calculation unit 87 is input to the field drive unit 89. The field drive unit 89 alternately turns on the first upper arm switch SH1 and the first lower arm switch SL1 and keeps the second upper arm switch SH2 off based on the input drive signal. The second lower arm switch SL2 is kept on.

  Incidentally, in the present embodiment, the calculation unit 87, the armature drive unit 88, and the field drive unit 89 correspond to a “drive unit”. In the present embodiment, the rotating electrical machine 30, the energization circuit unit 50, and the control device 60 are integrated to form an electromechanical integrated drive device.

  Next, the abnormality diagnosis process executed by the diagnosis unit 90 will be described with reference to FIG. In the present embodiment, the diagnosis unit 90 is configured to be able to execute an abnormality diagnosis process even when no drive command is input from the outside.

  In this series of processes, first, in step S10, it is determined whether or not an execution condition for the abnormality diagnosis process is satisfied. In the present embodiment, the execution condition includes a condition that the vehicle is stopped. More specifically, for example, the execution condition may include the condition that the vehicle is stopped after the user instructs the stop of the use of the vehicle. The stop of use of the vehicle is instructed by the user turning off the ignition switch or start switch, and the use of the vehicle is instructed by the user turning on the ignition switch or start switch.

  When an affirmative determination is made in step S10, the process proceeds to step S11 to determine whether or not the phase current Iar acquired by the armature current acquisition unit 84 is equal to or less than the armature side threshold value Iath. This process is a process for determining whether or not the field current may start to flow through the field winding 32. The armature side threshold value Iath will be described in detail later.

  When an affirmative determination is made in step S11, the process proceeds to step S12, and the field current acquisition unit 85 is maintained in a state where the switches of the armature energization circuit 51 are kept off so that the phase currents IU, IV, IW are set to zero. Each switch of the field energizing circuit 52 is driven so as to increase the field current Ifr obtained by the above to the field diagnosis current Ifdg larger than the field side threshold Ifth. Here, as the field current Ifr, for example, the field current IF2 based on the voltage drop amount of the shunt resistor connected to the source side of the second lower arm switch SL2 may be used.

  In the present embodiment, as a combination of a field current and a phase current in which the generated torque of the rotating electrical machine 30 is a torque threshold TLMT, a field-side threshold Ifth that is a field current threshold and an armature side that is a phase current threshold A threshold value Iath is set. Hereinafter, a method for setting the threshold values Ifth and Iath will be described.

  The generated torque Trq of the rotating electrical machine 30 is expressed by the following equation (eq1).

上式（ｅｑ１）において、ｐは極対数を示し、Ｍは相互インダクタンスを示し、Ｉｆは界磁電流を示し、Ｌｄ，Ｌｑはｄ，ｑ軸自己インダクタンスを示し、Ｉｄは電機子電流の磁束成分であるｄ軸電流を示し、Ｉｑは電機子電流のトルク成分であるｑ軸電流を示す。また、上式（ｅｑ１）の右辺において、第１項は「Ｉｆ×Ｉｑ」に依存する磁束トルクを示し、第２項は「Ｉｄ×Ｉｑ」に依存するリラクタンストルクを示す。上式（ｅｑ１）の左辺にトルク閾値ＴＬＭＴを代入する。本実施形態では、車両の停止状態において回転電機３０がトルクを発生したとしてもそのトルクに起因した車両の振動が車両のユーザに体感されない値にトルク閾値ＴＬＭＴが設定されている。そして、下式（ｅｑ２）を満たすようなｄ，ｑ軸電流Ｉｄ、Ｉｑから導かれる相電流，界磁電流が電機子側閾値Ｉａｔｈ，界磁側閾値Ｉｆｔｈとして設定されている。なお、電機子側閾値Ｉａｔｈ及び界磁側閾値Ｉｆｔｈは、制御装置６０が備える図示しない記憶部（例えばメモリ）に予め記憶されていればよい。

In the above formula (eq1), p represents the number of pole pairs, M represents the mutual inductance, If represents the field current, Ld and Lq represent the d and q axis self-inductance, and Id represents the magnetic flux component of the armature current. The d-axis current is Iq, and Iq is the q-axis current that is the torque component of the armature current. In the right side of the above equation (eq1), the first term represents the magnetic flux torque that depends on “If × Iq”, and the second term represents the reluctance torque that depends on “Id × Iq”. The torque threshold value TLMT is substituted into the left side of the above equation (eq1). In the present embodiment, the torque threshold value TLMT is set to a value at which the vibration of the vehicle due to the torque is not felt by the user of the vehicle even if the rotating electrical machine 30 generates torque when the vehicle is stopped. The phase current and field current derived from d and q-axis currents Id and Iq that satisfy the following equation (eq2) are set as the armature side threshold value Iath and the field side threshold value Ifth. The armature side threshold value Iath and the field side threshold value Ifth may be stored in advance in a storage unit (for example, a memory) (not shown) included in the control device 60.

ステップＳ１３では、界磁電流Ｉｆｒを界磁診断電流Ｉｆｄｇとしてかつ各相電流ＩＵ，ＩＶ，ＩＷを０とするように電機子通電回路５１及び界磁通電回路５２を駆動することを演算部８７に指示した状態で、界磁電流Ｉｆｒに基づいて界磁通電回路５２に関する異常の有無を診断する界磁側診断処理を行う。本実施形態において、界磁通電回路５２に関する異常には、界磁通電回路５２の異常、界磁通電回路５２と界磁巻線３２とを接続する電気経路の断線異常、界磁駆動部８９の異常、演算部８７における界磁通電回路５２の各スイッチＳＨ１〜ＳＬ２の駆動信号生成に関する異常、界磁駆動部８９から界磁通電回路５２までの信号伝達経路の異常、及び演算部８７から界磁駆動部８９までの信号伝達経路の異常が含まれる。界磁通電回路５２の異常には、界磁通電回路５２を構成する各スイッチＳＨ１〜ＳＬ２のオープン故障等の異常が含まれる。

In step S13, the operation unit 87 is driven to drive the armature energization circuit 51 and the field energization circuit 52 so that the field current Ifr is set to the field diagnosis current Ifdg and the phase currents IU, IV, and IW are set to 0. In the instructed state, a field side diagnosis process for diagnosing the presence / absence of an abnormality related to the field energizing circuit 52 based on the field current Ifr is performed. In the present embodiment, the abnormality related to the field energization circuit 52 includes an abnormality of the field energization circuit 52, an abnormality in the disconnection of the electric path connecting the field energization circuit 52 and the field winding 32, and the field drive unit 89. Abnormality, abnormality related to drive signal generation of each of the switches SH1 to SL2 of the field energizing circuit 52 in the arithmetic unit 87, abnormality of the signal transmission path from the field driving unit 89 to the field energizing circuit 52, and from the arithmetic unit 87 to the field An abnormality in the signal transmission path to the drive unit 89 is included. The abnormality of the field energization circuit 52 includes an abnormality such as an open failure of each of the switches SH1 to SL2 constituting the field energization circuit 52.

  For example, when a break in the electrical path connecting the field energization circuit 52 and the field winding 32 occurs, the field current does not flow through the field winding 32. For this reason, it is determined in step S13 that the field current Ifr is 0, and it is determined that an abnormality relating to the field energization circuit 52 has occurred. For example, when it is determined that the field current Ifr is deviated from the command value of the field current corresponding to the set duty ratio Duty, it is determined that an abnormality relating to the field energization circuit 52 has occurred.

  When it is determined in step S13 that an abnormality relating to the field energization circuit 52 has occurred, a process for notifying the outside of the control device 60 may be performed.

  In a succeeding step S14, it is determined whether or not the field side diagnosis process is completed. If it is determined in step S14 that the process has not been completed, the process returns to step S13. On the other hand, if it is determined in step S14 that the process has been completed, the field energization circuit 52 starts to be driven so as to decrease the field current Ifr from the field diagnostic current Ifdg toward 0, and the process proceeds to step S15. In step S15, it is determined whether or not the field current Ifr has become the field side threshold Ifth or less. This process is a process for determining whether or not the phase current may start to flow through the phase windings 35U to 35W.

  When an affirmative determination is made in step S15, the process proceeds to step S16, and a phase current is passed through each of the phase windings 35U to 35W. In this embodiment, each switch of the armature energization circuit 51 is driven so as to satisfy the following conditions (A), (B), and (C).

  (A) The condition that the upper arm of the same phase is not turned on.

  (B) A condition that, of the three phases, the upper arm switch of one phase is turned on and the lower arm switch of the remaining two phases is turned on.

  (C) A condition that the d-axis current Id flowing through the rotating electrical machine 30 is zero.

  FIG. 4 shows an example in which the U-phase upper arm switch SUp is turned on and the V and W-phase lower arm switches SVn and SWn are turned on. In the present embodiment, d satisfies the above equation (eq2) in a state where a current flows through the one-phase upper arm switch and the two-phase lower arm switch and a field current flows through the field winding 32. , Q-axis currents Id and Iq, phase currents and field currents are set as armature side threshold value Iath and field side threshold value Ifth. Here, for example, the armature side threshold value Iath may be set individually corresponding to each phase of the lower arm switch that is turned on among the three phases.

  In step S16, the phase current Iar acquired by the armature current acquisition unit 84 in a state in which the calculation unit 87 is instructed to keep each switch of the field energization circuit 52 off to set the field current Ifr to 0. Each switch of the armature energization circuit 51 is driven so as to increase the armature diagnosis current Iadg to be larger than the armature side threshold value Iath. Here, as the armature current Iar, a phase current based on the voltage drop amount of the shunt resistor connected to the source side of the lower arm switch to be turned on may be used.

  In step S17, armature-side diagnosis processing for diagnosing the presence / absence of an abnormality related to the armature energization circuit 51 based on the phase current Iar is performed. In the present embodiment, the abnormality related to the armature energization circuit 51 includes an abnormality in the armature energization circuit 51, an abnormality in disconnection of the electrical path connecting the armature energization circuit 51 and each of the phase windings 35U to 35W, and an armature drive unit. 88, an abnormality related to the drive signal generation of the switches SUp to SWn of the armature energizing circuit 51 in the arithmetic unit 87, an abnormality in the signal transmission path from the armature driving unit 88 to the armature energizing circuit 51, and the arithmetic unit 87 An abnormality in the signal transmission path to the armature drive unit 88 is included. The abnormality of the armature energization circuit 51 includes an abnormality of each switch SUp to SWn of the armature energization circuit 51.

  For example, when a disconnection occurs in the electrical path connecting the armature energization circuit 51 and the phase windings 35U to 35W, current does not flow through at least one of the two-phase lower arm switches instructed to be turned on. . For this reason, in step S17, it is determined that at least one of the two-phase phase currents Iar instructed to be turned on is 0, and it is determined that an abnormality relating to the armature energization circuit 51 has occurred.

  If it is determined in step S17 that an abnormality relating to the armature energization circuit 51 has occurred, a process for notifying the outside of the control device 60 may be performed.

  Incidentally, in step S16, the condition (B) may be changed to a condition in which the upper arm switch of two phases among the three phases is turned on and the lower arm switch of the remaining one phase is turned on. In this case, from the d and q axis currents Id and Iq satisfying the above equation (eq2) in a state where current flows through the two-phase upper arm switch and the one-phase lower arm switch and the field current flows. The induced phase current and field current may be set as the armature side threshold value Iath and the field side threshold value Ifth.

  In step S16, the condition (B) is changed to the condition that one of the three phases is turned on and the lower arm switch of any one of the remaining two phases is turned on. May be. In this case, from the d and q axis currents Id and Iq satisfying the above equation (eq2) in the state where the current flows through the one-phase upper arm switch and the one-phase lower arm switch and the field current flows. The induced phase current and field current may be set as the armature side threshold value Iath and the field side threshold value Ifth. In this case, since the lower arm switch to be turned on is one phase, the armature side threshold value Iath only needs to be set for one phase.

  In a succeeding step S18, it is determined whether or not the armature side diagnosis process is completed. If it is determined in step S18 that the process has not been completed, the process returns to step S17. On the other hand, if it is determined in step S18 that the operation has been completed, the armature energization circuit 51 starts to be driven so as to decrease the phase current Iar from the armature diagnosis current Iadg toward 0.

  Subsequently, the abnormality diagnosis process according to the present embodiment will be described with reference to FIG. FIG. 5 shows changes in the phase current Iar, the q-axis current Iq, the field current Ifr, and the torque Trq generated by the rotating electrical machine 30 as armature currents. In FIG. 5, as described above, the d-axis current Id is 0 and the reluctance torque is 0.

  In the illustrated example, the field current Ifr starts flowing at time t0, and then the field current Ifr reaches the field diagnostic current Ifdg at time t1. The field side diagnosis process is started from time t1, and the field side diagnosis process is completed at time t2. In the example shown in FIG. 5, it is diagnosed that no abnormality relating to the field energizing circuit 52 has occurred. After the completion of the field side diagnosis process, the field current Ifr starts to decrease toward zero.

  Thereafter, at time t3, the field current Ifr becomes the field side threshold Ifth. For this reason, the phase current Iar begins to flow while the field current Ifr is decreasing. Thereafter, field current Ifr becomes 0 at time t4, and phase current Iar reaches armature diagnostic current Iadg at time t5. In the present embodiment, the phase current Iar is the armature side threshold value Iath at time t4.

  The armature side diagnosis process is started from time t5, and the armature side diagnosis process is completed at time t6. In the example shown in FIG. 5, it is diagnosed that an abnormality relating to the armature energization circuit 51 has not occurred. After the armature side diagnosis process is completed, the phase current Iar is decreased toward 0, and the phase current Iar becomes 0 at time t7.

  In the above-described diagnosis processing, the field current Ifr and the phase current Iar are set to be larger than 0 in the period from time t3 to t4. However, during this period, the field current Ifr is less than or equal to the field side threshold Ifth and the phase current Iar is less than or equal to the armature side threshold Iath, so the generated torque Trq of the rotating electrical machine 30 is set to the torque threshold. It can be less than TLMT. In the present embodiment, as described above, the torque threshold value TLMT is set to a value at which the vibration of the vehicle due to the torque is not felt by the user even if the rotating electrical machine 30 generates torque when the vehicle is stopped. For this reason, the abnormality diagnosis process can be performed without giving the user a sense of incongruity.

  Moreover, according to this embodiment, the following effects are also acquired.

  The diagnosis unit 90 causes the phase current Iar to flow when it is determined that the field current Ifr has reached the field-side threshold Ifth before the field current Ifr drops to 0 after the completion of the field-side diagnosis processing. start. For this reason, the timing at which the phase current Iar reaches the armature diagnostic current Iadg can be advanced. As a result, the timing for starting the armature-side diagnosis process can be advanced, and as a result, the time required from the start of the field-side diagnosis process to the completion of the armature-side diagnosis process can be shortened.

  In the armature side diagnosis process, the d-axis current Id is set to 0. Thereby, the reluctance torque which the rotary electric machine 30 generate | occur | produces can be made zero. For this reason, the generated torque of the rotating electrical machine 30 during the armature side diagnosis process can be suppressed, and the uncomfortable feeling given to the user can be more preferably suppressed.

  The rotor 31 of the rotating electrical machine 30 and the output shaft 10a of the engine 10 are configured to be able to transmit power through the belt 42 at all times. In this case, when the field side diagnosis process is performed, if torque is generated in the rotating electrical machine 30 by flowing a field current, there is a high possibility that the user of the vehicle will feel uncomfortable. In addition, when the armature-side diagnosis process is performed, if torque is generated in the rotating electrical machine 30 by causing a phase current to flow through the phase windings 35U to 35W, there is a high possibility that the user will feel uncomfortable. As described above, in the present embodiment having a configuration capable of constantly transmitting power, which is likely to give a sense of incongruity to the user, there is a great merit in performing abnormality diagnosis processing that can reduce the generated torque of the rotating electrical machine 30 to be equal to or less than the torque threshold TLMT at the time of diagnosis.

(Second Embodiment)
Hereinafter, the second embodiment will be described with reference to the drawings with a focus on differences from the first embodiment. In the present embodiment, after the field side diagnosis process is completed, the phase current starts to flow after the field current Ifr drops to zero.

  FIG. 6 shows a procedure of abnormality diagnosis processing according to the present embodiment. This process is executed by the diagnosis unit 90. In FIG. 6, the same steps as those shown in FIG. 3 are given the same step numbers for the sake of convenience.

  In this series of processes, when an affirmative determination is made in step S10, the process proceeds to step S30, where it is determined whether or not the phase current Iar acquired by the armature current acquisition unit 84 is zero. This process is a process for determining whether or not it is a situation where the field current may start to flow.

  If a positive determination is made in step S30, the process proceeds to step S12. Thereafter, when an affirmative determination is made in step S14, the process proceeds to step S40. In step S40, it is determined whether or not the field current Ifr has become zero. This process is a process for determining whether or not the phase current may start to flow through the phase windings 35U to 35W. If a positive determination is made in step S40, the process proceeds to step S16.

  Subsequently, the abnormality diagnosis process according to the present embodiment will be described with reference to FIG. FIG. 7 is a diagram corresponding to FIG.

  In the illustrated example, the field side diagnosis process is completed at time t2, and the field current Ifr starts to decrease toward zero. Thereafter, the field current Ifr becomes 0 at time t3. For this reason, the phase current Iar begins to flow, and the phase current Iar reaches the armature diagnostic current Iadg at time t4. The armature side diagnosis process is started from time t4, and the armature side diagnosis process is completed at time t5. For this reason, the phase current Iar is decreased toward 0, and the phase current Iar becomes 0 at time t6.

  In the abnormality diagnosis process according to the present embodiment, the phase current Iar starts to flow after the field current Ifr becomes zero. For this reason, the torque generated by the rotating electrical machine 30 can be made zero over the period from the start of the field side diagnosis process to the completion of the armature side diagnosis process. Thereby, it can suppress suitably giving an uncomfortable feeling to the user of a vehicle at the time of diagnosis.

(Third embodiment)
Hereinafter, the third embodiment will be described with reference to the drawings with a focus on differences from the first embodiment. In the present embodiment, the armature side diagnosis process is first performed, and the field side diagnosis process is performed after the armature side diagnosis process is completed.

  FIG. 8 shows a procedure of abnormality diagnosis processing according to the present embodiment. This process is executed by the diagnosis unit 90. In FIG. 8, the same steps as those shown in FIG. 3 are given the same step numbers for the sake of convenience.

  In this series of processes, when an affirmative determination is made in step S10, the process proceeds to step S15. Thereafter, armature-side diagnosis processing is performed in step S17.

  Thereafter, when an affirmative determination is made in step S18, the process proceeds to step S11. When an affirmative determination is made in step S11, a field side diagnosis process is performed in step S13 after step S12.

  Next, the abnormality diagnosis process according to the present embodiment will be described with reference to FIG. FIG. 9 is a diagram corresponding to FIG.

  In the illustrated example, the phase current Iar starts flowing at time t0, and then the phase current Iar reaches the armature diagnostic current Iadg at time t1. The armature side diagnosis process is started from time t1, and the armature side diagnosis process is completed at time t2. For this reason, the phase current Iar starts to decrease toward zero.

  Thereafter, the phase current Iar becomes the armature side threshold value Iath at time t3. For this reason, the field current Ifr begins to flow while the phase current Iar is decreasing. Thereafter, the phase current Iar becomes 0 at time t4, and the field current Ifr reaches the field diagnostic current Ifdg at time t5. In the present embodiment, the field current Ifr becomes the field-side threshold Ifth at time t4.

  The field side diagnosis process is started from time t5, and the field side diagnosis process is completed at time t6. For this reason, field current Ifr is reduced toward 0, and field current Ifr becomes 0 at time t7.

  According to the present embodiment described above, the timing at which the field current Ifr reaches the field diagnostic current Ifdg can be advanced. As a result, the timing for starting the field side diagnosis process can be advanced, and as a result, the time required from the start of the armature side diagnosis process to the completion of the field side diagnosis process can be shortened.

(Fourth embodiment)
Hereinafter, the fourth embodiment will be described with reference to the drawings with a focus on differences from the third embodiment. In the present embodiment, after the armature side diagnosis process is completed, the field current starts to flow after the phase current Iar becomes zero.

  FIG. 10 shows a procedure of abnormality diagnosis processing according to this embodiment. This process is executed by the diagnosis unit 90. In FIG. 10, the same steps as those shown in FIG. 8 are given the same step numbers for the sake of convenience.

  In this series of processes, if an affirmative determination is made in step S18, it is determined in step S30 whether or not the phase current Iar has become zero. If a positive determination is made in step S30, the process proceeds to step S12.

  Subsequently, the abnormality diagnosis process according to the present embodiment will be described with reference to FIG. FIG. 11 is a diagram corresponding to FIG.

  In the illustrated example, the phase current Iar starts flowing at time t0, and then the phase current Iar reaches the armature diagnostic current Iadg at time t1. The armature side diagnosis process is started from time t1, and the armature side diagnosis process is completed at time t2. For this reason, the phase current Iar starts to decrease toward zero. Thereafter, the phase current Iar becomes 0 at time t3. For this reason, the field current Ifr starts to flow. Thereafter, the field current Ifr reaches the field diagnosis current Ifdg, and the field side diagnosis process is started. At time t4, the field side diagnosis process is completed. For this reason, the field current Ifr is decreased toward 0, and the field current Ifr becomes 0 at time t5.

  According to the present embodiment described above, as shown in FIG. 11 (d), the occurrence of the rotating electrical machine 30 is generated over a period from the start of the armature-side diagnosis process to the completion of the field-side diagnosis process. Torque can be reduced to zero. Thereby, it can suppress suitably giving an uncomfortable feeling to the user of a vehicle at the time of diagnosis.

(Fifth embodiment)
Hereinafter, the fifth embodiment will be described with reference to the drawings with a focus on differences from the first embodiment. In the present embodiment, in the armature side diagnosis process, the presence or absence of an abnormality in the armature energization circuit 51 is diagnosed using the q-axis current Iq instead of the phase current Iar.

  FIG. 12 shows a procedure of abnormality diagnosis processing according to the present embodiment. This process is executed by the diagnosis unit 90. In FIG. 12, the same steps as those shown in FIG. 3 are given the same step numbers for the sake of convenience.

  In this series of processes, if an affirmative determination is made in step S10, the process proceeds to step S50, where it is determined whether or not the q-axis current Iq is equal to or less than the armature side threshold value Iath. This process is a process for determining whether or not the field current may start to flow through the field winding 32. Here, the q-axis current Iq may be calculated based on the phase current Iar acquired by the armature current acquisition unit 84 and the angle signal output from the magnetic field detection unit 86.

  Further, the armature side threshold value Iath according to the present embodiment is, for example, a d, q axis that satisfies the above equation (eq2) in a state in which current flows through the one-phase upper arm switch and the two-phase lower arm switch. It is only necessary to set the q-axis current determined from the combination of the currents Id and Iq.

  If a positive determination is made in step S50, the process proceeds to step S12. Thereafter, the process proceeds to step S60 via step S16. In step S60, armature side diagnosis processing based on the q-axis current Iq calculated based on the phase current Iar and the angle signal is performed instead of the phase current Iar acquired by the armature current acquisition unit 84. For example, when it is determined that the q-axis current Iq is 0, it may be determined that an abnormality relating to the armature energization circuit 51 has occurred. After step S60 is completed, the process proceeds to step S18.

  According to the present embodiment described above, the same effects as those of the first embodiment can be obtained.

(Sixth embodiment)
Hereinafter, the sixth embodiment will be described with reference to the drawings with a focus on differences from the first embodiment. In the present embodiment, when the armature-side diagnosis process is performed, each switch of the armature energization circuit 51 is driven so that the d-axis current Id becomes a value other than 0 and the q-axis current Iq becomes 0. .

  FIG. 13 shows a procedure of abnormality diagnosis processing according to the present embodiment. This process is executed by the diagnosis unit 90. In FIG. 13, the same steps as those shown in FIG. 3 are given the same step numbers for the sake of convenience.

  In this series of processes, if an affirmative determination is made in step S15, the process proceeds to step S70, and armature current acquisition is performed in a state in which each switch of the field energization circuit 52 is kept off so that the field current Ifr is zero. The condition that the phase current Iar acquired by the unit 84 is increased to the armature diagnosis current Iadg larger than the armature side threshold Iath, and the d-axis current Id is set to a value other than 0 and the q-axis current Iq is set to 0. Then, each switch of the armature energization circuit 51 is driven so as to satisfy the above condition. Thereafter, the process proceeds to step S17.

  According to the present embodiment, the reluctance torque generated by the rotating electrical machine 30 during the armature side diagnosis process can be reduced to zero. For this reason, it is possible to suppress the torque generated by the rotating electrical machine 30 during the armature-side diagnosis process, and it is possible to more suitably suppress giving a sense of discomfort to the vehicle user.

(Seventh embodiment)
Hereinafter, the seventh embodiment will be described with reference to the drawings with a focus on differences from the first embodiment. In the present embodiment, a current for demagnetization is supplied to the field winding 32 when the armature side diagnosis process is performed. That is, when the armature side diagnosis process is performed, if the field winding 32 is magnetized, each switch of the field energizing circuit 52 is driven off so that the field current becomes zero. Regardless, a field current flows through the field winding 32, and the torque generated by the rotating electrical machine 30 can be larger than the torque threshold TLMT. For this reason, in this embodiment, a current for demagnetization is passed.

  FIG. 14 shows a procedure of abnormality diagnosis processing according to the present embodiment. This process is executed by the diagnosis unit 90. In FIG. 14, the same steps as those shown in FIG. 3 are given the same step numbers for the sake of convenience.

  In this series of processes, when an affirmative determination is made in step S15, the process proceeds to step S80, and a phase current is caused to flow through each phase winding 35U to 35W in the manner described in step S16. In step S80, as shown in FIG. 15, the arithmetic unit 87 is instructed to generate a drive signal for alternately turning on the second upper arm switch SH2 and the second lower arm switch SL2, and the first upper arm switch The operation unit 87 is instructed to generate a drive signal that keeps the switch SH1 off and keeps the first lower arm switch SL1 on. Here, the duty ratio Duty (= Ton / Tsw), which is the ratio of the on-time Ton to one switching cycle Tsw of the second upper arm switch SH2, is set to a larger value as the command value of the demagnetizing field current is larger. The Then, in the state where the field current for demagnetization flows, armature side diagnosis processing is performed in step S17.

  Incidentally, in the present embodiment, when each switch of the field energizing circuit 52 is turned off so that the field current becomes zero, the maximum value of the field current that can flow in the field winding 32 is the field side. It is assumed that it is less than the threshold Ifth. Therefore, an affirmative determination can be made in step S15 even if no field current for demagnetization is flowing.

  According to this embodiment described above, the state in which the field portion of the rotating electrical machine 30 including the field winding 32 and the permanent magnet 33 is magnetized can be eliminated. For this reason, when the armature side diagnosis process is performed, it is possible to suitably prevent the torque generated by the rotating electrical machine 30 from becoming larger than the torque threshold value TLMT.

(Other embodiments)
Each of the above embodiments may be modified as follows.

  The execution conditions for the abnormality diagnosis process are not limited to those described in step S10 of FIG. 3 of the first embodiment. For example, the stop state during one trip after the diagnosis unit 90 determines that the use of the vehicle is instructed by the user until the diagnosis unit 90 determines that the use of the vehicle is instructed to be stopped by the user It is good also considering the condition that it is as an execution condition. In this case, for example, even when the rotating electrical machine 30 generates torque in a state in which power transmission is enabled from the rotor 31 to the drive wheels 43 and the vehicle is stopped, the drive wheels 43 are rotated by the torque. The torque threshold value TLMT may be set to a value that does not begin.

  A salient pole machine with Ld≈Lq may be used as the rotating electric machine. In this case, the reluctance torque becomes substantially zero, and the torque of the rotating electrical machine 30 can be controlled by the field current and the q-axis current.

  The rotating electrical machine is not limited to a salient pole machine, and a non-salient pole machine may be used. In this case, Ld = Lq, and the torque Trq of the rotating electrical machine 30 is determined by the field current If and the q-axis current Iq as shown in the following equation (eq3).

・上記各実施形態では、界磁側診断処理及び電機子側診断処理の双方が行われたがこれに限らず、これら診断処理のうちいずれか一方が行われてもよい。

In each of the above embodiments, both the field side diagnosis process and the armature side diagnosis process are performed. However, the present invention is not limited to this, and any one of these diagnosis processes may be performed.

  3 may be replaced with a process for determining whether or not the phase current Iar is equal to or less than the armature side threshold value Iath.

  The process of step S15 in FIG. 3 of the first embodiment is replaced with a process for determining whether or not the field current Ifr is a predetermined field current that is greater than 0 and less than the field-side threshold Ifth. May be.

  In step S16 of FIG. 3 in the first embodiment, each switch of the armature energization circuit 51 may be driven so as to satisfy the condition that the q-axis current Iq is 0.

  The process of step S11 of FIG. 8 in the third embodiment may be replaced with a process of determining whether or not the phase current Iar is a predetermined phase current that is greater than 0 and less than the armature side threshold value Iath. Good.

  In each of the above embodiments, the armature energization circuit 51 is driven so that the phase current becomes 0 when the field side diagnosis process is performed, but the present invention is not limited to this. The armature energization circuit 51 is driven so that the phase current becomes a value other than 0 when the field side diagnosis process is performed on condition that the torque generated by the rotating electrical machine 30 is equal to or less than the torque threshold value TLMT. May be.

  In the first to sixth embodiments, the field energization circuit 52 is driven so that the field current becomes 0 when the armature-side diagnosis process is performed, but the present invention is not limited to this. The field energization circuit 52 is driven so that the field current becomes a value other than 0 when the armature-side diagnosis process is performed on condition that the generated torque of the rotating electrical machine 30 is equal to or less than the torque threshold value TLMT. It may be.

  A member for connecting the rotor 31 to the output shaft 10a so that the rotor 31 of the rotating electrical machine 30 and the output shaft 10a of the engine 10 can always transmit power is not limited to the belt 42, and other members may be used. Good.

  -Each switch which comprises the electricity supply circuit part 50 is not restricted to MOSFET, For example, IGBT may be sufficient. In this case, a free wheel diode may be connected in antiparallel to each IGBT.

  The rotating electrical machine 30 is not limited to a motor function but may have only a generator function.

  -As a vehicle by which a control apparatus is mounted, the vehicle which can switch the motive power between the rotor 31 and the output shaft 10a to a transmission state or interruption | blocking state may be sufficient. Further, the vehicle is not limited to a vehicle having only an engine as a driving power source. For example, a vehicle including only a rotating electrical machine as a main machine as a traveling power source, or a vehicle including an engine in addition to the rotating electrical machine as a main machine may be used. Furthermore, the control device is not limited to that mounted on the vehicle.

  DESCRIPTION OF SYMBOLS 30 ... Rotary electric machine, 32 ... Field winding, 35U, 35V, 35W ... U, V, W phase winding, 51 ... Armature energization circuit, 52 ... Field energization circuit, 60 ... Control apparatus, 87 ... Operation part , 90 ... diagnostic section.

Claims (10)

A rotating electrical machine (30) having an armature winding (35U-35W) and a field winding (32);
An armature energization circuit (51) driven to flow an armature current through the armature winding;
Applied to a system comprising a field energization circuit (52) driven to flow a field current through the field winding;
As a combination of the field current and the armature current that makes the generated torque of the rotating electrical machine equal to or less than the torque threshold, a field side threshold that is the threshold of the field current and an armature side that is the threshold of the armature current Threshold is set,
A drive unit (87-89) for driving at least one of the armature energization circuit and the field energization circuit;
In a state where the field current is set to be larger than the field-side threshold and the armature current is set to be equal to or less than the armature-side threshold, the driving unit is driven based on the field current. Field-side diagnosis processing for diagnosing an abnormality related to a field energization circuit, and driving by the drive unit so that the field current is less than the field-side threshold and the armature current is larger than the armature-side threshold. A diagnostic unit (90) for performing at least one of the armature-side diagnosis processing for diagnosing an abnormality related to the armature energization circuit based on the armature current in a state where . The diagnostic unit performs the armature side diagnostic process after the completion of the field side diagnostic process,
The drive unit sets the armature current to the armature side threshold at a timing at which the field current decreases to a predetermined value that is greater than 0 and less than or equal to the field side threshold after completion of the field side diagnosis process. The diagnostic apparatus according to claim 1, wherein the armature energization circuit and the field energization circuit are driven so as to increase toward the center. The diagnosis unit performs the field side diagnosis process after the armature side diagnosis process is completed,
After the armature side diagnosis process is completed, the drive unit sets the field current to the field side threshold at a timing at which the armature current decreases to a predetermined value that is greater than 0 and less than or equal to the armature side threshold. The diagnostic apparatus according to claim 1, wherein the armature energization circuit and the field energization circuit are driven so as to increase toward the center. The diagnostic unit performs the armature side diagnostic process after the completion of the field side diagnostic process,
The drive unit maintains the armature current at 0 when the field side diagnosis process is being performed, and the timing at which the field current decreases to 0 after the completion of the field side diagnosis process. The diagnostic device according to claim 1, wherein the armature energization circuit and the field energization circuit are driven so that the armature current is increased toward the armature-side threshold value. The diagnosis unit performs the field side diagnosis process after the armature side diagnosis process is completed,
The drive unit maintains the field current at 0 when the armature side diagnosis process is being performed, and the timing at which the armature current decreases to 0 after the armature side diagnosis process is completed. The diagnostic device according to claim 1, wherein the armature energization circuit and the field energization circuit are driven so that the field current is increased toward the field-side threshold value.   The diagnostic apparatus according to any one of claims 2 to 5, wherein the armature current in the diagnosis unit and the drive unit is a q-axis current of the rotating electrical machine.   The said drive part drives the said armature energization circuit so that the d-axis current or q-axis current of the said rotary electric machine may be set to 0, when flowing the said armature current. The diagnostic device described.   When the armature side diagnosis process is performed, the drive unit causes the field energization circuit to flow the field current for demagnetizing the magnetized field portion (32) of the rotating electrical machine. The diagnostic apparatus according to any one of claims 2 to 6, which is driven. A diagnostic device applied to a vehicle,
The vehicle is provided with an engine (10) as a driving power source,
The rotor is connected to the output shaft so that the rotor (31) of the rotating electrical machine and the output shaft (10a) of the engine can always transmit power. Diagnostic equipment.   The torque threshold according to claim 9, wherein the torque threshold is set to a value at which a vibration of the vehicle caused by the torque is not felt by a user of the vehicle even if the rotating electrical machine generates torque in a stopped state of the vehicle. Diagnostic device.

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