JP6665773B2 - Rotary electric machine rotation rise abnormality detection device, rotating electric machine unit - Google Patents

Description

  The present invention relates to a device for detecting an abnormality when a rotation speed of a rotating electric machine increases.

  Conventionally, when at least one phase current of each phase current of a multi-phase synchronous machine (rotating electric machine) is equal to or more than a predetermined value and the rotation speed is equal to or less than a predetermined value, it is determined to be in a locked state and a command is issued to the inverter to interrupt current. (See Patent Document 1).

JP-A-2003-9573

  However, when the rotation speed of the rotating electric machine is not appropriately increased, a relatively large phase current flows below a predetermined value, or the rotating electric machine rotates at a relatively low rotation speed above a predetermined value. Took notice. In this case, when the rotating electric machine is energized for a long time, components of the energized circuit may be overheated and damaged.

  SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and a main object of the present invention is to provide an apparatus for detecting a rotation rise abnormality of a rotating electric machine that can more widely detect an abnormality when the rotation speed of the rotating electric machine increases. It is in.

A first means for solving the above-mentioned problem is:
A rotation rise abnormality detection device (14, 20) for detecting abnormality when the rotation speed of a rotating electric machine (17) that performs power running by being energized is increased,
At the start of rotation of the rotating electric machine,
A first determination unit that determines that a state in which the rotating electrical machine is energized and the rotating speed of the rotating electrical machine is lower than the first rotating speed has continued for a first time;
The energization continuation time from the start of energization to the rotating electric machine is longer than the second time set longer than the first time, and the rotation speed of the rotating electric machine is set higher than the first rotation speed. A second determination unit that determines that the rotation speed is less than two rotation speeds;
When at least one of the determination by the first determination unit and the determination by the second determination unit is affirmed, a comprehensive determination unit that determines that the rotation speed of the rotary electric machine is abnormally increased.
Is provided.

  According to the above configuration, the rotating electric machine performs power running by being energized. Here, when the rotating electrical machine starts rotating, the first determination unit determines that the state where the rotating electrical machine is energized and the rotating speed of the rotating electrical machine is lower than the first rotating speed has continued for the first time. . This determination is for determining a locked state in which the rotating speed of the rotating electrical machine has not increased to the first rotating speed or more even though the rotating electrical machine has been energized continuously for the first time. This determination is performed at any time when the rotating electric machine starts rotating, and may be affirmed at any time.

  Further, at the start of rotation of the rotating electric machine, the second determination unit determines that the energization continuation time from the start of energization to the rotating electric machine is longer than the second time set longer than the first time, and the rotation speed of the rotating electric machine is lower. It is determined that the rotation speed is lower than the second rotation speed set higher than the first rotation speed. This determination is made that the rotation speed of the rotating electric machine is higher than the first rotation speed even though the energization of the rotating electric machine has been continued for longer than the second time set longer than the first time. This is for determining a rotation speed reduction state that has decreased below the set second rotation speed.

  Then, when at least one of the determination by the first determination unit and the determination by the second determination unit is affirmed, the comprehensive determination unit determines that the increasing state of the rotation speed of the rotating electric machine is abnormal. Therefore, the locked state and the reduced rotation speed state can be detected as abnormalities when the rotation speed of the rotating electric machine increases, and the abnormalities can be detected more widely. Furthermore, as compared with the technology described in Patent Document 1, since the phase current of the rotating electric machine is not used for the above determination, it is possible to suppress erroneous determination of the lock state due to inrush current to the rotating electric machine, noise, and the like. Can be.

  In a configuration in which the rotating electric machine starts the engine, the crankshaft of the engine may be rusted, foreign matter may be caught in a bearing of the crankshaft, or the engine may be misfired. In that case, when the engine is started, there is a possibility that the rotation speed of the rotating electric machine cannot be appropriately increased.

  In this regard, the second means employs a configuration in which the rotating electric machine starts the engine, and the rotation of the rotating electric machine starts the engine. Therefore, in a configuration in which the rotating electric machine starts the engine, it is possible to more widely detect an abnormality when the rotation speed of the rotating electric machine increases.

  When the engine is started by the rotating electric machine, the cranking by the rotating electric machine ends when the engine starts an independent operation. However, when the engine cannot start the self-sustaining operation, the rotating electric machine may be energized for a long time.

  In this regard, the third means includes a third determination unit that determines that the energization continuation time from the start of energization to the rotating electric machine is longer than the second time and longer than a set third time, When at least one of the determination by the first determination unit, the determination by the second determination unit, and the determination by the third determination unit is affirmed, the general determination unit abnormally increases the rotation speed of the rotating electric machine. Is adopted. Therefore, when the engine cannot start the self-sustaining operation and the energization continuation time from the start of energization to the rotating electric machine becomes longer than the third time, it is determined that the increasing state of the rotating speed of the rotating electric machine is abnormal. Can be.

  Specifically, as in the fourth means, the third time is longer than the time required to determine that the engine is unlikely to start, and the rotating electric machine is at a higher speed than the second rotation speed. It is also possible to adopt a configuration in which, when the rotating electric machine is continuously energized while rotating at a high third rotational speed, the energizing circuit is set to be shorter than the time that the energizing circuit is damaged. According to such a configuration, when the engine is unlikely to start, it is possible to determine that the increase in the rotational speed of the rotating electric machine is abnormal while suppressing damage to the energizing circuit. As the third time, for example, 800 to 1200 ms can be adopted.

  The time until the energizing circuit that energizes the rotating electric machine is damaged depends on the magnitude of the current that is applied to the rotating electric machine. For example, the magnitude of the current supplied to the rotating electric machine changes according to the voltage of the power storage device that outputs the current to the rotating electric machine.

  In this regard, the fifth means adopts a configuration in which the third time is set based on the magnitude of the current supplied to the rotating electric machine. Therefore, the third time can be appropriately set according to the magnitude of the current supplied to the rotating electric machine.

  Specifically, as in the sixth means, the second time is longer than a time required to determine that the rotation speed of the rotating electric machine is decreasing when the engine is started, and the second time is longer than the second time. It is possible to adopt a configuration in which, when the electric machine is rotating at a rotation speed lower than the second rotation speed and power is continuously supplied to the rotating electric machine, the time is set to be shorter than a time during which the energization circuit is damaged. it can. According to such a configuration, when the rotating speed of the rotating electrical machine is reduced at the time of starting the engine, it is determined that the rising state of the rotating speed of the rotating electrical machine is abnormal while suppressing damage to the energizing circuit. Can be. As the second time, for example, 200 to 400 ms can be adopted.

  Specifically, as in the seventh means, the first time is longer than a time required for determining that the rotating electric machine is in the locked state, and is a state in which the rotation of the rotating electric machine is stopped. It is possible to adopt a configuration in which, when the rotating electric machine is continuously energized, the energizing circuit is set to be shorter than the time during which the energizing circuit is damaged. According to such a configuration, when the rotating electric machine is in the locked state, it is possible to determine that the increasing state of the rotating speed of the rotating electric machine is abnormal while suppressing damage to the energizing circuit. As the first time, for example, 50 to 150 ms can be adopted.

  In an eighth aspect, the first time and the second time are set based on a magnitude of a current supplied to the rotating electric machine.

  According to the above configuration, the first time and the second time are set based on the magnitude of the current supplied to the rotating electric machine. Therefore, the first time and the second time can be appropriately set according to the magnitude of the current supplied to the rotating electric machine.

  In the configuration in which the rotating electric machine runs the vehicle, the running of the vehicle may be hindered by a vehicle stop or the vehicle may be running on a steep uphill road. In this case, there is a possibility that the rotation speed of the rotating electric machine cannot be appropriately increased at the start of the running of the vehicle.

  In this regard, in the ninth means, the rotating electric machine causes the vehicle to run, and adopts a configuration in which the running of the vehicle is started by the rotation of the rotating electric machine being started. Therefore, in a configuration in which the rotating electric machine causes the vehicle to travel, it is possible to more widely detect an abnormality when the rotation speed of the rotating electric machine increases.

  In a tenth means, an energization suspending unit for suspending energization to the rotating electrical machine when the comprehensive determination unit determines that the increasing state of the rotation speed of the rotating electrical machine is abnormal.

  According to the above configuration, when the general determination unit determines that the increasing state of the rotation speed of the rotating electric machine is abnormal, the energization to the rotating electric machine is stopped. Therefore, when the rotation speed of the rotating electric machine is abnormally increased, the energization of the rotating electric machine can be stopped to protect the components of the energizing circuit.

  In an eleventh means, a reverse rotation determining unit that determines that the rotating electrical machine is rotating in the reverse direction, and when the rotating electrical machine is determined to be rotating in the reverse direction by the reverse rotation determining unit, A case where the electric power supplied to the rotating electric machine is limited to less than the predetermined electric power for a predetermined time, and thereafter, the re-energizing unit that energizes the rotating electric machine; A first time correction unit for extending the first time or providing a mask period for determining that the first time has been continued.

  According to the above configuration, when the reverse rotation determining unit determines that the rotating electric machine is rotating in the reverse direction, the power supplied to the rotating electric machine by energization is limited to less than the predetermined electric power for a predetermined time, and thereafter, the electric power is supplied to the rotating electric machine. It is energized. Then, when the power is limited to less than the predetermined power for a predetermined time, a mask period is provided for determining that the first time is extended or has continued for the first time. For this reason, when the rotating electrical machine rotates in the reverse direction when the rotating electrical machine starts rotating, and then rotates forward to normally increase the rotating speed of the rotating electrical machine, the rising state of the rotating electrical machine is abnormal. Erroneous determination can be suppressed.

  The twelfth means is a rotating electrical machine unit (10), wherein the rotating electrical machine abnormality detecting device (14, 20) according to any one of the first to eleventh means, and the rotating electrical machine (17) A power converter (13) for performing power conversion between the rotating electric machine and the power storage device (15, 22, 23).

  According to the above configuration, in the rotating electrical machine unit including the rotating electrical machine rotation rise abnormality detection device, the rotating electrical machine, and the power conversion unit, it is possible to more widely detect an abnormality when the rotating electrical machine increases in rotation speed.

FIG. 2 is a circuit diagram illustrating a configuration of a vehicle-mounted rotating electrical machine system. 9 is a flowchart illustrating a procedure of a process for detecting an abnormality when the rotation speed of the rotating electric machine increases. The figure which shows the energizing time and rotational speed of the rotating electric machine at the time of engine starting.

  Hereinafter, an embodiment embodied as a rotating electric machine system mounted on a vehicle will be described with reference to the drawings.

  As shown in FIG. 1, the in-vehicle rotating electrical machine system 100 includes a rotating electrical machine unit 10, an engine ECU (Electronic Control Unit) 20, a battery 22 (corresponding to a power storage device), a second capacitor 23 (corresponding to a power storage device), and an electric load. 24 and the like. The rotating electric machine unit 10 includes a rotating electric machine 17, an inverter 13, a rotating electric machine ECU 14, and the like. The rotating electric machine unit 10 is a generator with a motor function (powering function), and is configured as an ISG (Integrated Starter Generator) of a mechanical and electric integrated type. The rotating electric machine 17 includes X, Y, and Z-phase windings 11X, 11Y, and 11Z as three-phase armature windings, a field winding 12, a rotation position sensor 18, and current sensors 19X and 19Y. The battery 22 is, for example, a Pb battery that outputs a voltage of 12V. The battery 22 may be a battery different from the Pb battery that outputs 12 V, a battery that outputs a voltage other than 12 V, or the like.

  The X, Y, and Z phase windings 11X, 11Y, and 11Z are wound around a stator core (not shown) to form a stator. In the present embodiment, the first ends of the X, Y, and Z phase windings 11X, 11Y, and 11Z are connected at a neutral point. That is, the rotary electric machine unit 10 is Y-connected.

  The field winding 12 is wound around a field pole (not shown) arranged opposite to the inner peripheral side of the stator core to form a rotor. By supplying an exciting current to the field winding 12, the field pole is magnetized. An alternating voltage is output from each phase winding 11X, 11Y, 11Z by a rotating magnetic field generated when the field pole is magnetized. In this embodiment, the rotor obtains rotational power from the crankshaft of the vehicle-mounted engine 101 (the body of the vehicle-mounted engine is schematically shown in FIG. 1) and rotates. The rotation position sensor 18 detects a rotation position of the field winding 12. The rotation position sensor 18 includes a resolver, a Hall element, and the like. The engine 101 is, for example, an engine using gasoline as fuel, and generates a driving force by burning fuel. The engine 101 is not limited to a gasoline engine, but may be a diesel engine using light oil as fuel or an engine using other fuels.

  Inverter 13 (corresponding to a power conversion unit and an energizing circuit) converts an AC voltage (AC power) output from each phase winding 11X, 11Y, 11Z into a DC voltage (DC power). The inverter 13 converts a DC voltage supplied from the battery 22 into an AC voltage and outputs the AC voltage to each of the phase windings 11X, 11Y, and 11Z. The inverter 13 (corresponding to a rectifier circuit and a drive circuit) is a bridge circuit having the same number of upper and lower arms as the number of phases of the armature winding. Specifically, the inverter 13 includes an X-phase module 13X, a Y-phase module 13Y, and a Z-phase module 13Z, and forms a three-phase full-wave rectifier circuit. The inverter 13 constitutes a drive circuit that drives the rotating electric machine 17 by adjusting the AC voltage supplied to each phase winding 11X, 11Y, 11Z of the rotating electric machine 17. The current sensor 19X detects a current flowing through the X-phase winding, and the current sensor 19Y detects a current flowing through the Y-phase winding.

  Each of the X, Y, and Z phase modules 13X, 13Y, and 13Z includes an upper arm switch Sp and a lower arm switch Sn. That is, the switches Sp and Sn are bridge-connected. In this embodiment, a voltage-controlled semiconductor switching element is used as each of the switches Sp and Sn, and specifically, an N-channel MOSFET is used. An upper arm diode Dp is connected in antiparallel (parallel) to the upper arm switch Sp, and a lower arm diode Dn is connected in antiparallel (parallel) to the lower arm switch Sn. In the present embodiment, the body diodes of the switches Sp and Sn are used as the diodes Dp and Dn. The diodes Dp and Dn are not limited to the body diodes, and may be, for example, diodes of different parts from the switches Sp and Sn.

  The second terminal of the X-phase winding 11X is connected to the X terminal PX of the X-phase module 13X. The low potential side terminal (source) of the upper arm switch Sp and the high potential side terminal (drain) of the lower arm switch Sn are connected to the X terminal PX. The drain of the upper arm switch Sp is connected to the B terminal (corresponding to an output terminal) of the rotary electric machine unit 10, and the source of the lower arm switch Sn is connected to the ground portion (ground GND) via the E terminal of the rotary electric machine unit 10. ) Of the engine 101 are connected. The B terminal is a terminal connected to the positive electrode of the battery 22, and is formed in a detachable connector shape.

  The second end of the Y-phase winding 11Y is connected to the Y terminal PY of the Y-phase module 13Y. The connection point between the upper arm switch Sp and the lower arm switch Sn is connected to the Y terminal PY. The B terminal is connected to the drain of the upper arm switch Sp, and the body of the engine 101 as the ground GND is connected to the source of the lower arm switch Sn via the E terminal.

  The second terminal of the Z-phase winding 11Z is connected to the Z terminal PZ of the Z-phase module 13Z. A connection point between the upper arm switch Sp and the lower arm switch Sn is connected to the Z terminal PZ. The B terminal is connected to the drain of the upper arm switch Sp, and the body of the engine 101 as the ground GND is connected to the source of the lower arm switch Sn via the E terminal.

  A first capacitor 15 (corresponding to a power storage device) and a Zener diode 16 are connected in parallel to a series connection of the switches Sp and Sn constituting each of the phase modules 13X, 13Y and 13Z. A voltage sensor 41 (corresponding to a voltage detection unit and a voltage acquisition unit) that detects a voltage between the high-voltage connection point P1 and the low-voltage connection point P2 of the inverter 13 is provided.

  The rotating electrical machine ECU 14 (corresponding to a rotation rise abnormality detecting device) is configured as a microcomputer including a CPU, a ROM, a RAM, an input / output interface, and the like. The rotating electric machine ECU 14 adjusts an exciting current flowing through the field winding 12 by an IC regulator (not shown) in the rotating electric machine ECU 14. Thereby, the generated voltage (voltage at the B terminal) of the rotating electrical machine unit 10 is controlled. Further, the rotating electrical machine ECU 14 controls the inverter 13 after the vehicle starts running to drive the rotating electrical machine 17 to assist the driving force of the engine 101. When receiving a command to start the engine 101 from the engine ECU 20, the rotating electric machine 17 can apply rotation to the crankshaft when the engine 101 starts, and has a function as a starter. The rotary electric machine ECU 14 is connected to an engine ECU 20 as a control device outside the rotary electric machine unit 10 via an L terminal as a communication terminal and a communication line. The engine ECU 20 is configured as a microcomputer including a CPU, a ROM, a RAM, an input / output interface, and controls the operating state of the engine 101. The rotating electrical machine ECU 14 performs two-way communication (for example, serial communication using a LIN protocol) with the engine ECU 20, and exchanges information with the engine ECU 20.

  The rotating electrical machine ECU 14 grasps a required torque (including a braking torque) required of the rotating electrical machine 17 based on the serial communication signal transmitted from the engine ECU 20. Then, the rotating electric machine ECU 14 controls the PWM voltage applied to the field winding 12 and the on / off states of the switches Sp and Sn so that the rotating electric machine 17 generates the required torque. Specifically, the rotating electric machine ECU 14 calculates the rotation speed of the field winding 12 (that is, the rotating electric machine 17) based on the rotation position of the field winding 12 detected by the rotation position sensor 18. The rotation speed corresponds to the number of rotations per unit time, and includes an angular speed, an angle change amount per unit time, and the like. Further, the rotating electrical machine ECU 14 may use a smoothed value of the calculated rotation speed. Thus, it is possible to suppress fluctuations in the rotation speed caused by, for example, loosening of the belt connecting the crankshaft of the engine 101 and the rotor of the rotary electric machine 17, and further, erroneous detection of an abnormality when the rotation speed increases. Based on the X-phase and Y-phase currents detected by the current sensors 19X and 19Y and the rotational position and rotational speed of the field winding 12, the rotary electric machine ECU 14 turns on and off phases and on / off periods (duty cycles) of the switches Sp and Sn. Control).

  The engine ECU 20 and the positive terminal of the battery 22 are connected to the B terminal via a relay 21. The body of the engine 101 as a ground GND is connected to a negative terminal of the battery 22. A second capacitor 23 and an electric load 24 are connected to the B terminal. The electric load 24 includes an electric load whose operating voltage is equal to or higher than a predetermined voltage, such as an electronic control brake system of a vehicle or an electric power steering. The operating voltage is a voltage at which the electric load can exhibit specified performance, such as a guaranteed voltage or a rated voltage of the electric load. The electric load 24 may include an air conditioner, in-vehicle audio, a headlamp, and the like. Note that the relay 21 is turned on by turning on the ignition switch.

  The crankshaft of the engine 101 may be rusted, foreign matter may be caught in a bearing or the like of the crankshaft, or the engine 101 may be misfired. In this case, when the engine 101 is started, there is a possibility that the rotation speed of the rotating electric machine 17 cannot be appropriately increased.

  Therefore, in the present embodiment, when the rotating electric machine 17 starts the engine 101, the rotating electric machine 17 determines whether or not the rising state of the rotation speed of the rotating electric machine 17 is abnormal. FIG. 2 is a flowchart illustrating a procedure of a process for detecting an abnormality when the rotation speed of the rotary electric machine 17 increases. This series of processes is repeatedly executed by the rotating electric machine ECU 14 at a predetermined cycle when the rotating electric machine ECU 14 receives a command for starting the engine 101 by the rotating electric machine 17 and a required torque from the engine ECU 20.

  First, it is determined whether or not the state in which the rotating electric machine 17 is energized and the rotating speed of the rotating electric machine 17 is lower than the first rotating speed has continued for a first time (S11). Here, the rotating electrical machine ECU 14 starts energizing the rotating electrical machine 17 in response to a command to start the engine 101. The energization of the rotary electric machine 17 means that the PWM voltage applied to the field winding 12 and the on / off state of the switches Sp and Sn are controlled, that is, the energization that allows the electric rotary machine 17 to run. State. The first time is longer than the time required for determining that the rotating electric machine 17 is in the locked state, and when the rotating electric machine 17 is continuously powered while the rotation of the rotating electric machine 17 is stopped, the first time The time is set shorter than the time during which the switches Sp and Sn are damaged. The first time is desirably set to 50 to 150 ms, for example, 100 ms. The first rotation speed is desirably set to 50 to 150 rpm, and is set to, for example, 100 rpm.

  When the determination in S11 is negative, for example, when the rotation speed of the rotating electric machine 17 is equal to or higher than the first rotation speed or when the energization has not been continued for the first time (S11: NO), the energization of the rotating electric machine 17 is started. It is determined whether the energization continuation time from is longer than the second time and whether the rotation speed of the rotary electric machine 17 is lower than the second rotation speed (S12). The second time is longer than the time required to determine that the rotation speed of the rotating electric machine 17 is decreasing when the engine 101 is started, and the rotating electric machine 17 rotates at a rotation speed lower than the second rotation speed. The switch Sp, Sn of the inverter 13 is set to be shorter than the time when the switch Sp, Sn is damaged when the rotating electric machine 17 is continuously energized in the state where the power is supplied. The second time is desirably set to 200 to 400 ms, and is set to, for example, 300 ms. That is, the second time is set longer than the first time. The second rotation speed is desirably set to 150 to 250 rpm, and is set to, for example, 200 rpm. That is, the second rotation speed is set higher than the first rotation speed.

  When the determination in S12 is negative, for example, when the energization continuation time from the start of energization to the rotary electric machine 17 is shorter than the second time, or when the rotation speed of the rotary electric machine 17 is equal to or higher than the second rotation speed (S12: NO), it is determined whether or not the energization continuation time from the start of energization to the rotary electric machine 17 is longer than the third time (S13). The third time is longer than the time required to determine that the engine 101 is unlikely to start, and continues in a state where the rotating electric machine 17 is rotating at the third rotation speed higher than the second rotation speed. The switch Sp and Sn of the inverter 13 are set to be shorter than the time when the switches Sp and Sn of the inverter 13 are damaged when the rotating electric machine 17 is energized. The third time is desirably set to 800 to 1200 ms, and is set to, for example, 1000 ms. That is, the third time is set longer than the second time. The third rotation speed is a rotation speed lower than the rotation speed at which the engine 101 can operate independently.

  When at least one of the determination of S11, the determination of S12, and the determination of S13 is affirmed (at least one of S11: YES, S12: YES, S13: YES is satisfied), the increasing state of the rotational speed of the rotary electric machine 17 is abnormal. Is determined (S14). Then, energization of the rotating electric machine 17 is stopped (S15). Specifically, the PWM voltage applied to the field winding 12 is set to 0, and all the switches Sp and Sn of the inverter 13 are turned off. Thereafter, this series of processing ends (END).

  On the other hand, if the determination in S13 is negative (S13: NO), it is determined whether the engine 101 has started self-sustaining operation (S16). Specifically, the combustion of fuel in the engine 101 is started, and the rotation speed of the engine 101 has increased to a predetermined rotation speed at which the operation of the engine 101 can be continued even after the cranking by the rotating electric machine 17 is finished. Is determined.

  If it is determined in S16 that the engine 101 has started the self-sustaining operation (S16: YES), the cranking by the rotating electric machine 17 ends (S17). Specifically, the application of the PWM voltage to the field winding 12 according to the command to start the engine 101 and the control of the on / off states of the switches Sp and Sn are ended. Thereafter, this series of processing ends (END).

  When it is determined in S16 that the engine 101 has not started the self-sustaining operation (S16: NO), the series of processes is temporarily ended (END). After that, the processing is executed again from the processing of S11.

  Note that the processing of S11 corresponds to processing as a first determination unit, the processing of S12 corresponds to processing as a second determination unit, the processing of S13 corresponds to processing as a third determination unit, and S11 to S14. Corresponds to the processing of the overall determination unit, and the processing of S14 to S15 corresponds to the processing of the power supply suspension unit.

  FIG. 3 is a diagram illustrating the energization time and the rotation speed of the rotating electric machine 17 when the engine is started. With reference to the figure, a description will be given of a determination mode when the rotation speed of the rotary electric machine 17 is abnormally increased.

  As shown by the solid line M1, when the rotating electric machine 17 is locked, the rotating speed of the rotating electric machine 17 becomes substantially zero. In this case, the first mode in which the rotating electric machine 17 is in the locked state when the state in which the rotating electric machine 17 is energized and the rotation speed of the rotating electric machine 17 is lower than the first rotation speed N1 continues for the first time t1. Is determined to be abnormal. That is, although the rotating electric machine 17 is energized continuously for the first time t1, the rotating speed of the rotating electric machine 17 has not increased to the first rotating speed N1 or more, so that the locked state is determined. Then, the energization of the rotating electric machine 17 is stopped. Note that this determination is performed at an arbitrary time when the rotating electric machine 17 starts rotating, and may be affirmed at any time.

  As indicated by the two-dot chain line M2, when the crankshaft of the engine 101 is rusted, or when foreign matter is caught in a bearing or the like of the crankshaft, the rotation speed of the rotary electric machine 17 is reduced without increasing. become. In this case, when the energization continuation time from the start of energization to the rotating electric machine 17 is longer than the second time t2 and the rotation speed of the rotating electric machine 17 becomes lower than the second rotation speed N2, the rotating electric machine 17 It is determined that the abnormality is in the second mode that is in the lowered state. That is, since the rotating speed of the rotating electrical machine 17 has been reduced to less than the second rotating speed N2 despite the fact that the rotating electrical machine 17 has been continuously powered for more than the second time t2 from the start of energizing, the rotating speed has been reduced. It is determined that it is in the lowered state. In short, when the energization time and the rotation speed of the rotating electric machine 17 are in the state of the region R1, it is determined that the rotation speed is in the reduced state. Then, the energization of the rotating electric machine 17 is stopped.

  As indicated by the one-dot chain line M3, when the fuel does not ignite or misfires in the engine 101, the rotation speed of the rotating electric machine 17 is not increased to the rotation speed capable of the self-sustaining operation, resulting in a rotation speed shortage state. In this case, when the energization continuation time from the start of energization to the rotary electric machine 17 becomes longer than the third time t3, it is determined that the rotary electric machine 17 is abnormal in the third mode in which the rotation speed is insufficient. That is, since the engine 101 has not started the self-sustaining operation even though the energization of the rotating electric machine 17 has been continued for a longer time than the third time t3, it is determined that the rotation speed is insufficient. . In short, when the energizing time of the rotating electric machine 17 falls within the range of the region R2, it is determined that the rotating speed is insufficient. Then, the energization of the rotating electric machine 17 is stopped.

  On the other hand, as shown by the broken line M4, when the engine 101 starts normally, the rotation speed of the rotating electric machine 17 increases until the third time t3 elapses, and the cranking by the rotating electric machine 17 is terminated. .

  The embodiment described above has the following advantages.

  The locked state and the reduced rotation speed state can be detected as the abnormality when the rotation speed of the rotary electric machine 17 increases, and the abnormality can be detected more widely. Further, as compared with the technique described in Patent Document 1, the phase current of the rotating electric machine 17 is not used for the above-described determination, so that erroneous determination of the lock state due to an inrush current to the rotating electric machine 17 or noise is suppressed. can do.

  In the configuration in which the rotating electric machine 17 starts the engine 101, it is possible to more widely detect an abnormality when the rotation speed of the rotating electric machine 17 increases.

  When the engine 101 cannot start the self-sustained operation and the energization continuation time from the start of energization to the rotary electric machine 17 is longer than the third time t3, it is determined that the rotation speed of the rotary electric machine 17 is abnormally increased. Can be determined.

  The third time t3 is longer than the time required to determine that the engine 101 is unlikely to start, and the rotating electric machine 17 is rotating at the third rotation speed higher than the second rotation speed N2. Is set shorter than the time when the inverter 13 is damaged when the rotating electric machine 17 is continuously energized. According to such a configuration, when the engine 101 is unlikely to start, it is possible to determine that the increase in the rotation speed of the rotary electric machine 17 is abnormal while suppressing damage to the inverter 13.

  The second time t2 is longer than the time required to determine that the rotation speed of the rotary electric machine 17 is decreasing when the engine 101 is started, and the rotation speed of the rotary electric machine 17 is lower than the second rotation speed N2. Is set to be shorter than the time when the inverter 13 is damaged when the rotating electric machine 17 is continuously energized in the state of rotating. According to such a configuration, when the rotation speed of the rotary electric machine 17 is reduced at the time of starting the engine 101, it is determined that the rotation speed of the rotary electric machine 17 is abnormal while suppressing the inverter 13 from being damaged. Can be determined.

  The first time t1 is longer than the time required for determining that the rotating electric machine 17 is in the locked state, and the inverter is activated when the rotating electric machine 17 is continuously supplied with the rotation of the rotating electric machine 17 stopped. 13 is set to be shorter than the damage time. According to such a configuration, when the rotating electric machine 17 is in the locked state, it is possible to determine that the rising state of the rotating speed of the rotating electric machine 17 is abnormal while suppressing damage to the inverter 13.

  -When it is determined that the increasing state of the rotating speed of the rotating electric machine 17 is abnormal, the energization to the rotating electric machine 17 is stopped. Therefore, when the rotation speed of the rotating electric machine 17 is abnormally increased, the power supply to the rotating electric machine 17 can be stopped to protect the switches Sp and Sn of the inverter 13.

  In the rotary electric machine unit 10 including the rotary electric machine ECU 14, the rotary electric machine 17, and the inverter 13, it is possible to detect a wider abnormality when the rotation speed of the rotary electric machine 17 increases.

  -Since the rotating electrical machine unit 10 is an electromechanical integrated type ISG, it is possible to reduce the length of wiring for transmitting signals and the like as compared with a configuration in which electromechanical is separate. For this reason, when detecting the rotation speed of the rotary electric machine 17, the influence of noise can be suppressed, and the accuracy of detecting the rotation speed can be improved. Further, since it is not necessary to transmit a signal to the outside through communication, it is possible to quickly determine an abnormality and to secure a long determination time. As a result, the size of the switches Sp and Sn of the inverter 13 can be reduced, and the cost can be reduced.

  The above-described embodiment can be modified and implemented as follows.

  The time until the inverter 13 that energizes the rotating electric machine 17 is damaged depends on the magnitude of the current that is applied to the rotating electric machine 17. For example, the magnitude of the current supplied to the rotating electric machine 17 changes according to the voltage of the battery 22 that outputs the current to the rotating electric machine 17. Therefore, the rotating electrical machine ECU 14 may set the first to third times t1 to t3 based on the magnitude of the current supplied to the rotating electrical machine 17. According to such a configuration, the first to third times t1 to t3 can be appropriately set according to the magnitude of the current supplied to the rotating electric machine 17. If the switches Sp, Sn, etc. of the inverter 13 are cooled by a fan or the like, the first to third times t1 to t3 may be corrected according to the cooling state of the switches Sp, Sn, etc.

  When the rotation of the rotating electric machine 17 is started, the rotating electric machine 17 may rotate in the reverse direction, and then rotate forward to increase the rotation speed of the rotating electric machine 17 normally. In this case, as compared with the case where there is no reverse rotation of the rotating electric machine 17, the time until the cranking by the rotating electric machine 17 ends is longer, but the rising state of the rotating speed of the rotating electric machine 17 is not abnormal. Therefore, the rotating electrical machine ECU 14 rotates the rotating electrical machine 17 by energizing when the rotating electrical machine 17 determines that the rotating electrical machine 17 is rotating in the reverse direction. When the power supplied to the electric machine 17 is limited to less than the predetermined power for a predetermined time, and then the power is supplied to the rotating electric machine 17 for a predetermined time, a first power supply unit is provided. A first time correction unit that extends the time t1 or provides a mask period for determining that the first time t1 has been continued may be provided. The rotating electrical machine ECU 14 can determine whether or not the rotating electrical machine 17 has rotated in the reverse direction based on the rotation position of the field winding 12 detected by the rotation position sensor 18.

  According to the above configuration, when the reverse rotation determining unit determines that the rotating electric machine 17 is rotating in the reverse direction, the power supplied to the rotating electric machine 17 by energization is limited to less than the predetermined power for a predetermined time (that is, the rotating electric machine The output of the rotary electric machine 17 is limited to less than the predetermined output for a predetermined time. Then, when the power is limited to less than the predetermined power for a predetermined time, a mask period is provided for determining that the first time t1 is extended or continued for the first time t1. For this reason, when the rotating electric machine 17 rotates in the reverse direction when the rotating electric machine 17 starts to rotate, and then rotates forward to normally increase the rotating speed of the rotating electric machine 17, the rotating speed of the rotating electric machine 17 increases. Can be suppressed from being erroneously determined to be abnormal.

  In the above embodiment, the second determination unit determines that the energization continuation time from the start of energization to the rotary electric machine 17 is longer than the second time t2 set to be longer than the first time t1, and the rotation speed of the rotary electric machine 17 Is less than the second rotation speed N2 set higher than the first rotation speed N1. Here, the second rotation speed N2 is set to a variable value that increases stepwise as the duration of energization to the rotary electric machine 17 is longer, or a variable value that increases continuously as the duration of energization to the rotary electric machine 17 is longer. May be. In addition to the first determination unit, the second determination unit, and the third determination unit, the rotating electrical machine ECU 14 determines, based on other conditions, that the increasing state of the rotation speed of the rotating electrical machine 17 is abnormal based on other conditions. And the like.

  An MG (Motor Generator) or the like that generates a driving force capable of running the vehicle may be employed as the rotating electric machine 17, and the rotating electric machine 17 may perform EV traveling. That is, when the rotating electric machine 17 starts rotating, the EV traveling of the vehicle is started. In such a configuration, the traveling of the vehicle may be hindered by a vehicle stop or the like, or the vehicle may travel on a steep ascending road. In this case, there is a possibility that the rotation speed of the rotating electric machine 17 cannot be appropriately increased at the start of the running of the vehicle.

  Therefore, at the start of running of the vehicle, the rotating electrical machine ECU 14 may determine whether or not the rising state of the rotating speed of the rotating electrical machine 17 is abnormal. In this case, in the flowchart of FIG. 2, the first rotation speed N1, the first time t1, the second rotation speed N2, and the second time t2 are appropriately changed in accordance with the conditions at the time of starting traveling of the vehicle, and S13, S16 , S17 may be omitted. According to this configuration, in the configuration in which the rotating electric machine 17 causes the vehicle to travel, it is possible to more widely detect an abnormality when the rotating speed of the rotating electric machine 17 increases. Eventually, energization of the rotating electric machine 17 can be stopped to protect the switches Sp, Sn, etc. of the inverter 13.

  The functions of the first determination unit, the second determination unit, the third determination unit, the overall determination unit, and the power supply stop unit can be realized by the engine ECU 20 instead of the rotating electric machine ECU 14. Further, these functions may be distributed to the rotating electric machine ECU 14 and the engine ECU 20.

  The rotating electric machine having a multi-phase multiplex winding can be used as the rotating electric machine 17. As the rotating electric machine 17, a magnet-type rotating electric machine having a rotor 58 with a magnet may be adopted instead of the field winding 12. In that case, the control of the inverter 13 may be changed according to the configuration of the rotating electric machine 17. When the rotating electric machine 17 is a magnet-type rotating electric machine, energizing the rotating electric machine 17 means that the on / off state of the switches Sp and Sn is controlled, that is, energizing the stator (stator) of the rotating electric machine 17. The state that is doing. In addition, the configuration of the inverter 13 may be such that the entire X, Y, Z phase modules 13X, 13Y, 13Z are configured as an integrated module, or two of the X, Y, Z phase modules 13X, 13Y, 13Z are integrated modules. It may be constituted as.

  10: rotating electric machine unit, 13: inverter, 14: rotating electric machine ECU, 17: rotating electric machine, 20: engine ECU.

Claims (12)

A rotation rise abnormality detection device (14, 20) for detecting abnormality when the rotation speed of a rotating electric machine (17) that performs power running by being energized is increased,
At the start of rotation of the rotating electric machine,
A first determination unit that determines that a state in which the rotating electrical machine is energized and the rotating speed of the rotating electrical machine is lower than the first rotating speed has continued for a first time;
The energization continuation time from the start of energization to the rotating electric machine is longer than the second time set longer than the first time, and the rotation speed of the rotating electric machine is set higher than the first rotation speed. A second determination unit that determines that the rotation speed is less than two rotation speeds;
When at least one of the determination by the first determination unit and the determination by the second determination unit is affirmed, a comprehensive determination unit that determines that the increasing state of the rotation speed of the rotary electric machine is abnormal.
A rotation rise abnormality detection device for a rotating electric machine comprising: The rotating electric machine is for starting an engine (101),
The rotation increase abnormality detection device for a rotary electric machine according to claim 1, wherein the rotation of the rotary electric machine starts to start the engine. A third determination unit configured to determine that a duration of energization from the start of energization to the rotating electric machine is longer than a third time set longer than the second time;
The at least one of the determination by the first determination unit, the determination by the second determination unit, and the determination by the third determination unit are positive when the rotation speed of the rotary electric machine is increased. The rotation rise abnormality detection device for a rotating electric machine according to claim 2, wherein the abnormality is determined to be abnormal.   The third time is longer than a time required to determine that the engine is unlikely to start, and in a state where the rotating electric machine is rotating at a third rotation speed higher than the second rotation speed. The rotation rise abnormality detection device for a rotating electric machine according to claim 3, wherein the time is set to be shorter than a time when an energizing circuit is damaged when the rotating electric machine is continuously energized.   5. The rotation rise abnormality detection device for a rotating electric machine according to claim 3, wherein the third time is set based on a magnitude of a current supplied to the rotating electric machine. 6.   The second time is longer than a time required to determine that the rotation speed of the rotating electric machine is decreasing when the engine is started, and the rotating electric machine is at a rotation speed lower than the second rotation speed. The rotation rise abnormality detection of the rotating electric machine according to any one of claims 2 to 5, wherein the time is set to be shorter than a time when the energizing circuit is damaged when the rotating electric machine is continuously energized in a rotating state. apparatus.   The first time is longer than a time required for determining that the rotating electric machine is in the locked state, and an energizing circuit when the rotating electric machine is continuously energized while the rotation of the rotating electric machine is stopped. The rotation rise abnormality detection device for a rotary electric machine according to any one of claims 2 to 6, wherein the time is set to be shorter than a time during which the motor is damaged.   The rotation rise abnormality detection device for a rotating electric machine according to any one of claims 1 to 7, wherein the first time and the second time are set based on a magnitude of a current supplied to the rotating electric machine. The rotating electric machine is for driving a vehicle,
The rotation rise abnormality detection device for a rotating electric machine according to claim 1, wherein the running of the vehicle is started by starting rotation of the rotating electric machine.   The power supply stopping unit for stopping power supply to the rotary electric machine when the increase in the rotation speed of the rotary electric machine is determined to be abnormal by the comprehensive determination unit. The rotation rise abnormality detection device for a rotating electric machine according to the above. A reverse rotation determination unit that determines that the rotating electric machine is rotating in the reverse direction,
When it is determined by the reverse rotation determining unit that the rotating electric machine is rotating in the reverse direction, the power supplied to the rotating electric machine by energization is limited to less than a predetermined electric power for a predetermined time, and then the rotating electric machine is energized. Re-energizing section,
A first time correction unit that extends the first time or provides a mask period to determine that the first time has been continued, when the power is limited to less than the predetermined power by the re-energization unit for the predetermined time; and ,
The rotation rise abnormality detection device for a rotating electrical machine according to any one of claims 1 to 10, further comprising: A rotation rise abnormality detection device (14, 20) for a rotating electric machine according to any one of claims 1 to 11,
A rotating electric machine unit (10) comprising: the rotating electric machine (17); and a power conversion unit (13) that performs power conversion between the rotating electric machine and a power storage device (15, 22, 23).

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