JP2017131045A - Rotary electric machine control device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rotary electric machine control device that is able to suitably detect that a rotary electric machine is reversely rotated erroneously.SOLUTION: On the basis of energization command signals U1_com, V1_com, W1_com, U2_com, V2_com,W2_com, a rotating-direction determination part 72 for an ISG control part 70 determines a command rotating direction, which is a direction in which an MG40 is to be rotated. A reverse-rotation permission determination part 73 determines whether the MG40 may be reversely rotated or not. If reverse rotation of the MG40 is not permitted and the command rotating direction is a reverse rotating direction, an output inhibition determination part 74 stops the MG40. Since the direction in which the MG40 is to be rotated is determined using an energization command signal, the direction in which it is to be rotated is suitably determined regardless of the actual rotating direction of the MG40.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a rotating electrical machine control device.

  Conventionally, an abnormality detection device for a brushless motor is known. For example, in Patent Document 1, if the output signal of the actual rotation sensor is different from the expected signal of the rotation sensor when the brushless motor rotates to the right or left, it is determined that there is an abnormality.

JP-A-6-178586

In patent document 1, abnormality is detected according to the transition of a rotation sensor signal state. Since the rotation sensor signal is a result of the rotation state, it cannot be detected that reverse rotation is being performed during normal rotation. Further, for example, there is a possibility that a state in which the motor is rotated from an external device such as an engine is erroneously detected as an abnormality in the rotating electrical machine control device.
The present invention has been made in view of the above-described problems, and an object of the present invention is to provide a rotating electrical machine control device that can appropriately detect that the rotating electrical machine is erroneously reversely rotated.

  A rotating electrical machine control device according to the present invention controls a rotating electrical machine (40, 140) to which electric power is converted by an inverter unit (50, 60, 150), and includes a signal generator (71) and a rotational direction determination. Unit (72), a reverse rotation allowance determining unit (73), and an output prohibition determining unit (74).

The signal generation unit is a signal that controls the on / off operation of the switching elements (51 to 56, 61 to 66, 151 to 156) of the inverter unit, and generates a rectangular wave energization command signal corresponding to the rotation angle of the rotating electrical machine. To do.
A rotation direction determination part acquires the electricity supply command signal output to an inverter part, and determines the instruction | command rotation direction which is a direction which is going to rotate a rotary electric machine based on an electricity supply command signal.
The reverse rotation allowance determining unit determines whether or not the rotating electrical machine can be rotated in the reverse direction.
The output prohibition determination unit stops the rotating electrical machine when the rotating electrical machine is not permitted to rotate backward and the command rotational direction is the reverse rotational direction.

  In the present invention, using the energization command signal, it is determined as the direction in which the rotating electrical machine is about to be rotated. It can be judged appropriately. Further, for example, it is possible to prevent erroneous detection of a state in which rotation is performed from an external device such as an engine connected to the rotating electrical machine as an abnormality of the rotating electrical machine control device.

1 is a schematic configuration diagram illustrating a vehicle control system according to a first embodiment of the present invention. 1 is a circuit diagram showing an ISG according to a first embodiment of the present invention. It is a block diagram which shows ISG by 1st Embodiment of this invention. It is explanatory drawing explaining the rotation direction by 1st Embodiment of this invention. It is explanatory drawing explaining the electricity supply command signal at the time of reverse rotation by 1st Embodiment of this invention. It is a flowchart explaining the reverse rotation determination process by 1st Embodiment of this invention. It is a circuit diagram which shows ISG by 2nd Embodiment of this invention. It is a block diagram which shows ISG by 2nd Embodiment of this invention. It is explanatory drawing explaining the rotation direction by 2nd Embodiment of this invention. It is explanatory drawing explaining the electricity supply command signal at the time of reverse rotation by 2nd Embodiment of this invention.

Hereinafter, a rotating electrical machine control apparatus according to the present invention will be described with reference to the drawings. Hereinafter, in a plurality of embodiments, the same numerals are given to the substantially same composition, and explanation is omitted.
(First embodiment)
A rotating electrical machine control apparatus according to a first embodiment of the present invention is shown in FIGS.
As shown in FIGS. 1 to 3, the ISG control unit 70 as the rotating electrical machine control device of the present embodiment is an ISG (Integrated Starter Generator) 30 having both a function as a starter motor of the engine 11 and a function as an alternator. Applies to

First, a vehicle control system 90 in which the ISG 30 is used will be described with reference to FIG.
The vehicle control system 90 includes an engine 11, a clutch 13, a transmission (described as “T / M” in the drawing) 15, an ISG 30, an engine ECU 80 as a host control unit, a transmission ECU 85, and the like. To control.

  The engine 11 is an internal combustion engine having a plurality of cylinders, for example. The output shaft 12 of the engine 11 is connected to the transmission 15. The output shaft 12 is provided with a clutch 13 that can connect and disconnect the engine 11 and the transmission 15. The driving force of the engine 11 is transmitted to the drive shaft 91 via the transmission 15. The driving force transmitted to the drive shaft 91 rotates the drive wheels 95 via the gear 92 and the axle 93. The transmission 15 is, for example, a continuously variable transmission (CVT) that can change continuously. The transmission may be a multi-stage transmission that can be changed in stages. Further, the transmission 15 may be a manual transmission (MT) or an automatic transmission (AT).

  The engine ECU 80 receives signals from various sensors such as a signal related to the accelerator opening from the accelerator sensor 81, a signal related to the brake pedaling force from the brake sensor 82, and a signal related to the vehicle speed from the vehicle speed sensor 83, The drive of the engine 11 is controlled. The transmission ECU 85 controls the clutch 13 and the transmission 15. The engine ECU 80, the transmission ECU 85, and the ISG control unit 70 are configured to be able to transmit information via a CAN (Controller Area Network) or the like.

As shown in FIGS. 2 and 3, the ISG 30 includes a motor generator 40 as a rotating electrical machine, a first driver unit 47, a second driver unit 48, an ISG control unit 70, and the like. Hereinafter, the motor generator is referred to as “MG” as appropriate.
As shown in FIG. 2, the MG 40 has two sets of three-phase windings 41 and 42 and a field winding 45. The MG 40 has a function as an electric motor that generates torque by being supplied with electric power from the battery 105 and rotates, and a function as a generator that is driven by the engine 11 and the like to generate electric power. The rotor of MG 40 is connected to the crankshaft of engine 11 via belt 115 (see FIG. 2). Thereby, the engine 11 can be started by making MG40 function as an electric motor. In addition, the MG 40 can charge the battery 105 by being driven by the engine 11 and generating electric power. The electric power of the battery 105 is also supplied to the auxiliary machine 106 (see FIG. 1).

Three-phase windings 41 and 42 are wound around a stator (not shown) of MG 40. The first three-phase winding 41 has a U1 coil 411, a V1 coil 412, and a W1 coil 413. The second three-phase winding 42 has a U2 coil 421, a V2 coil 422, and a W2 coil 423. The three-phase windings 41 and 42 have different neutral points.
The second three-phase winding 42 is disposed at a position shifted by 30 ° in electrical angle with respect to the first three-phase winding 41 in the forward rotation direction (see FIG. 4). However, the electrical angle between the windings is not limited to 30 °.

  The field winding 45 is wound around a rotor (not shown) of the MG 40 and is supplied with a field current If. The field circuit 46 is controlled based on a command from the ISG control unit 70, and is, for example, a switching element or a rectifying element.

  As shown in FIG. 3, the first driver unit 47 is provided corresponding to the first three-phase winding 41 and has a first inverter unit 50. The second driver unit 48 is provided corresponding to the second three-phase winding 42 and has a second inverter unit 60. In FIG. 3, the first inverter unit 50 is referred to as “INV1”, and the second inverter unit 60 is referred to as “INV2”.

  As shown in FIG. 2, the first inverter unit 50 includes six switching elements 51 to 56. Hereinafter, the switching element is appropriately referred to as “SW element”. The SW elements 51 to 56 of this embodiment are MOSFETs, but IGBTs, thyristors, or the like may be used. The same applies to the SW elements 61 to 66. By controlling the on / off operation of the SW elements 51 to 56, the three-phase voltages Vu1, Vv1, and Vw1 are applied to the first three-phase winding 41.

  The SW elements 51 to 53 are connected to the high potential side, and the SW elements 54 to 56 are connected to the low potential side. The connection point of the U-phase SW elements 51 and 54 that form a pair is connected to one end of the U1 coil 411. A connection point between the paired V-phase SW elements 52 and 55 is connected to one end of the V1 coil 412. A connection point between the paired W-phase SW elements 53 and 56 is connected to one end of the W1 coil 413.

The second inverter 60 unit has six SW elements 61 to 66. By controlling the on / off operation of the SW elements 61 to 66, the three-phase voltages Vu2, Vv2, and Vw2 are applied to the second three-phase winding 42.
The SW elements 61 to 63 are connected to the high potential side, and the SW elements 64 to 66 are connected to the low potential side. The connection point of the U-phase SW elements 61 and 64 that form a pair is connected to one end of the U2 coil 421. A connection point between the paired V-phase SW elements 62 and 65 is connected to one end of the V2 coil 422. A connection point between the paired W-phase SW elements 63 and 66 is connected to one end of the W2 coil 423.
Hereinafter, each phase of the first inverter unit 50 and the first three-phase winding 41 is designated as U1 phase, V1 phase, W1 phase, each phase of the second inverter unit 60 and the second three-phase winding 42 is designated as U2. Phase, V2 phase, W2 phase.

  The SW elements 51 to 56 and 61 to 66 allow energization from the high potential side to the low potential side when turned on, and prohibit energization from the high potential side to the low potential side when turned off. Each of the SW elements 51 to 56 and 61 to 66 is provided with diodes 571 to 576 and 671 to 676 that allow energization from the low potential side to the high potential side. For example, if the SW elements 51 to 56 and 61 to 66 are MOSFETs, the diodes 571 to 576 and 671 to 676 can be parasitic diodes of the MOSFET. The diodes 571 to 576 and 671 to 676 are not limited to parasitic diodes, and may be externally attached to the SW elements 51 to 56 and 61 to 66.

  The ISG control unit 70 is configured mainly with a microcomputer or the like. Each process in the ISG control unit 70 may be a software process by executing a program stored in advance in a substantial memory device such as a ROM by a CPU, or a hardware process by a dedicated electronic circuit. Also good. The same applies to the engine ECU 80 and the transmission ECU 85 described above.

As shown in FIG. 3, ISG control unit 70 acquires a mode command related to the drive mode of MG 40 and a torque command related to the torque of MG 40 from engine ECU 80.
The ISG control unit 70 acquires a detection value related to the electrical angle θe of the MG 40 acquired from the rotation angle sensor 75. In the present embodiment, the electrical angle θe corresponds to the “rotation angle”. Further, the ISG control unit 70 acquires, from the current sensor 76, detection values of currents supplied to the coils 411 to 413 and 421 to 423 and detection values of currents supplied to the field winding 45.

The ISG control unit 70 controls the driving of the MG 40 by controlling the on / off operation of the SW elements 51 to 56 and 61 to 66, and includes a signal generation unit 71, a rotation direction determination unit 72, and a reverse rotation allowance determination unit. 73, an output prohibition determination unit 74, and the like.
The signal generation unit 71 generates energization command signals U1_com, V1_com, W1_com for controlling the on / off operation of the SW elements 51 to 56 based on the torque command value, the electrical angle θe, and the like, and outputs them to the first driver unit 47. When the energization command signal U1_com is at a high level, the SW element 51 is turned on and the SW element 54 is turned off. When the energization command signal U1_com is at a low level, the SW element 51 is turned off and the SW element 54 is turned on. When the energization command signal V1_com is at a high level, the SW element 52 is turned on and the SW element 55 is turned off. When the energization command signal V1_com is at a low level, the SW element 52 is turned off and the SW element 55 is turned on. When the energization command signal W1_com is at a high level, the SW element 53 is turned on and the SW element 56 is turned off. When the energization command signal W1_com is at a low level, the SW element 53 is turned off and the SW element 56 is turned on.

  The signal generation unit 71 generates energization command signals U2_com, V2_com, W2_com for controlling the on / off operation of the SW elements 61 to 66 based on the torque command value, the electrical angle θe, and the like, and outputs them to the second driver unit 48. When the energization command signal U2_com is at a high level, the SW element 61 is turned on and the SW element 64 is turned off. When the energization command signal U2_com is at a low level, the SW element 61 is turned off and the SW element 64 is turned on. When the energization command signal V2_com is at a high level, the SW element 62 is turned on and the SW element 65 is turned off. When the energization command signal V2_com is at a low level, the SW element 62 is turned off and the SW element 65 is turned on. When the energization command signal W2_com is at a high level, the SW element 63 is turned on and the SW element 66 is turned off. When the energization command signal W2_com is at a low level, the SW element 63 is turned off and the SW element 66 is turned on.

  In the present embodiment, the MG 40 is controlled by so-called rectangular wave control. Specifically, the energization command signals U1_com, V1_com, W1_com, U2_com, V2_com, and W2_com are switched between a low level and a high level for each electrical angle of 180 °. In the energization command signal, the phase difference between phases in the same system is 120 °, and the phase difference between systems in the same phase is 30 °. In this embodiment, the rectangular wave control is performed by 180 ° energization, but is not limited to 180 ° energization and may be 120 ° energization.

  The rotation direction determination unit 72 internally acquires the energization command signals U1_com, V1_com, W1_com, U2_com, V2_com, and W2_com of the final output stage output to the driver units 47 and 48 by the ISG control unit 70, and Based on the signals U1_com, V1_com, W1_com, U2_com, V2_com, W2_com, the direction in which the MG 40 is to be rotated is determined. The determination result is output to the output prohibition determination unit 74. Hereinafter, the direction in which the MG 40 is to be rotated is referred to as “command rotation direction”. For example, when the MG 40 is rotating in the forward direction, the actual rotation direction of the MG 40 does not necessarily match the command rotation direction, for example, the command rotation direction is reverse rotation.

  In the present embodiment, the timing at which the energization command signals U1_com, V1_com, W1_com, U2_com, V2_com, and W2_com switch from one of the high level or the low level to the other is defined as “edge”. The rotation direction determination unit 72 determines the command rotation direction based on the phase order in which edges occur.

As shown in FIG. 4, the three-phase windings 41 and 42 are arranged in the order of the U1 coil 411, the U2 coil 421, the V1 coil 412, the V2 coil 422, the W1 coil 413, and the W2 coil 423 in the forward rotation direction. . When the MG 40 is rotated in the forward rotation direction, the SW elements 51 to 53 and 61 to 63 on the high potential side are turned on in the order of U1, U2, V1, V2, W1, and W2.
On the other hand, when the MG 40 is rotated in the reverse rotation direction, the SW elements 51 to 53 and 61 to 63 on the high potential side are turned on in the order of the W2, W1, V2, V1, U2, and U1 phases.

FIG. 5 shows energization command signals U1_com, V1_com, W1_com, U2_com, V2_com, and W2_com when the command rotation direction is the reverse rotation direction. In FIG. 5, the high level of the energization command signal is denoted as “H” and the low level as “L”.
As shown in FIG. 5, when the command rotation direction is the reverse rotation direction, the energization command signal U1_com switches from a low level to a high level at an electrical angle of 0 ° and from a high level to a low level at 180 °. The energization command signal V1_com is switched from a low level to a high level at an electrical angle of 240 °, and from a high level to a low level at 60 °. The energization command signal W1_com is switched from a low level to a high level at an electrical angle of 120 °, and from a high level to a low level at 300 °.

  The energization command signal U2_com is switched from a low level to a high level at an electrical angle of 330 ° and from a high level to a low level at 150 °. The energization command signal V2_com is switched from a low level to a high level at an electrical angle of 210 ° and from a high level to a low level at 30 °. The energization command signal W2_com is switched from a low level to a high level at an electrical angle of 90 ° and from a high level to a low level at 270 °.

  That is, in one electrical angle cycle, when viewed as a whole, a total of 12 edges are included every 30 °. Here, an edge that switches from a high level to a low level is an HL edge, and an edge that switches from a low level to a high level is an LH edge. Further, “V2 phase HL edge (30 °)” means that it becomes a V2 phase HL edge at an electrical angle of 30 °.

  The edge order when the command rotation direction is the reverse rotation direction is as shown by arrows in FIG. 5, and is the U1 phase LH edge (0 °), the V2 phase HL edge (30 °), the V1 phase HL edge ( 60 °), W2 phase LH edge (90 °), W1 phase LH edge (120 °), U2 phase HL edge (150 °), U1 phase HL edge (180 °), V2 phase LH edge (210 °), V1 The phase LH edge (240 °), the W2 phase HL edge (270 °), the W1 phase HL edge (300 °), and the U2 phase LH edge (330 °). In the present embodiment, the rotation direction determination unit 72 detects the phase order of the edges, and if the state where the command rotation direction is the reverse rotation direction continues for a predetermined period (or a predetermined number of times), the command rotation direction is It determines with it being a reverse rotation direction.

  Returning to FIG. 3, the reverse rotation allowance determining unit 73 determines whether or not the reverse rotation of the MG 40 is allowed based on a mode command or the like from the engine ECU 80. The determination result is output to the output prohibition determination unit 74. Here, if the mode command from engine ECU 80 is “reverse rotation mode”, it is assumed that reverse rotation of MG 40 is allowed. For example, when adjusting the tension of the belt 115 after the engine is stopped and before restarting, the mode command is “reverse rotation start”, and the ISG control unit 70 rotates the MG 40 in reverse according to the command of the engine ECU 80. In such a case, the reverse rotation allowance determining unit 73 determines that the reverse rotation of the MG 40 is allowed. In addition to the mode command value, it may be determined whether to allow reverse rotation in consideration of the torque command value.

  The output prohibition determination unit 74 determines whether to prohibit the output of the MG 40 based on the determination results acquired from the rotation direction determination unit 72 and the reverse rotation allowance determination unit 73. Specifically, when the command rotation direction is the reverse rotation direction and the reverse rotation is not permitted, the output prohibition determination unit 74 performs a fail-safe measure to prohibit the output of the MG 40. Specifically, the output prohibition determination unit 74 outputs a shutdown command SS for turning off all the SW elements 51 to 56 and 61 to 66 to the driver units 47 and 48, and stops the MG 40. This prevents unintended reverse rotation. When the command rotation direction is the forward rotation direction or when the reverse rotation is allowed, the shutdown command SS is not output, and the inverter units 50 and 60 are energized command signals U1_com, V1_com, W1_com, U2_com, V2_com. , W2_com.

The reverse rotation determination process of this embodiment is shown in the flowchart of FIG.
In the first step S101, the reverse rotation allowance determining unit 73 determines whether or not the mode command acquired from the engine ECU 80 is the reverse rotation mode. Hereinafter, “step” in step S101 is omitted, and is simply referred to as “S”. The other steps are the same. If it is determined that the mode command acquired from engine ECU 80 is the reverse rotation mode (S101: YES), this determination process is repeated. When it is determined that the mode command acquired from the engine ECU 80 is not the reverse rotation mode (S101: NO), the process proceeds to S102.

In S102, the rotation direction determination unit 72 determines whether or not the command rotation direction is the reverse rotation direction. When it is determined that the command rotation direction is not the reverse rotation direction (S102: NO), the process returns to S101. When it is determined that the command rotation direction is the reverse rotation direction (S102: YES), the process proceeds to S103.
In S103, the output prohibition determination unit 74 shuts down the inverter units 50 and 60 as a fail-safe measure. Thereby, the drive of MG40 is stopped.

  In this embodiment, on the assumption that the MG 40 is controlled by rectangular wave control, the command rotation direction is determined based on the phase order of the edges of the energization command signal. By determining the command rotation direction based on the energization command signal, it is possible to detect at an early stage that the MG 40 is going to be rotated in the reverse direction. Further, the rotation of the MG 40 of this embodiment is transmitted to the engine 11. In the present embodiment, when the MG 40 is intended to rotate in reverse, the drive of the MG 40 is stopped by shutting down the inverter units 50 and 60. Thereby, reverse explosion of the engine 11 and reverse running of the vehicle 100 due to reverse rotation unintended by the MG 40 can be prevented.

  For example, when determining the reverse rotation based on the detection value of the rotation sensor of the MG 40, it is determined whether the reverse rotation is based on the command or whether the engine 11 or the like is reversely rotated by the torque from the outside of the MG 40. I can't. Therefore, when the reverse rotation is determined based on the detection value of the rotation sensor, for example, when the engine 11 is stopped, the temporary reverse rotation that should be allowed by the rotation of the engine 11 is performed by the ISG control unit 70. There is a risk of misjudging it as abnormal. In the present embodiment, by using the energization command signal for determination of reverse rotation, it is possible to appropriately detect that the MG 40 is going to be reversely rotated by a command from the ISG control unit 70.

  Further, in the case where reverse rotation is determined based on the detection value that is the result of the rotation state, it is not possible to detect a state in which reverse rotation is being performed while the MG 40 is rotating forward. In the present embodiment, by using an energization command signal for determination of reverse rotation, it is possible to appropriately detect a state in which the MG 40 is erroneously reversely rotated even when the MG 40 is rotating forward.

As described above, the ISG control unit 70 of the present embodiment controls the MG 40 in which power is converted by the inverter units 50 and 60, and includes the signal generation unit 71, the rotation direction determination unit 72, and the reverse rotation. An allowance determining unit 73 and an output prohibition determining unit 74 are provided.
The signal generation unit 71 is a signal for controlling the on / off operation of the SW elements 51 to 56 and 61 to 66 of the inverter units 50 and 60, and the rectangular wave energization command signals U1_com and V1_com corresponding to the electrical angle θe of the MG 40. W1_com, U2_com, V2_com, and W2_com are generated.

The rotation direction determination unit 72 acquires energization command signals U1_com, V1_com, W1_com, U2_com, V2_com, W2_com output to the inverter units 50, 60, and based on the energization command signals U1_com, V1_com, W1_com, U2_com, V2_com, W2_com. The command rotation direction that is the direction in which the MG 40 is to be rotated is determined.
The reverse rotation allowance determining unit 73 determines whether or not the MG 40 may be rotated in the reverse direction.
The output prohibition determination unit 74 stops the MG 40 when the reverse rotation of the MG 40 is not permitted and the command rotation direction is the reverse rotation direction.

  In the present embodiment, since the direction in which the MG 40 is to be rotated is determined using the energization command signals U1_com, V1_com, W1_com, U2_com, V2_com, and W2_com, the MG 40 is rotated regardless of the actual rotation direction. The direction in which it is going can be determined early and appropriately. Further, it is possible to prevent erroneous detection of a state in which the MG 40 is rotated from an external device such as the engine 11 as an abnormality of the ISG control unit 70.

Based on a command from engine ECU 80, reverse rotation allowance determination unit 73 determines whether or not MG 40 can be rotated in reverse. Thereby, it can be appropriately determined whether or not the MG 40 may be rotated in reverse.
The MG 40 has two sets of three-phase windings 41 and 42. Inverter units 50 and 60 are provided for each of the three-phase windings 41 and 42. When two sets of three-phase windings 41 and 42 are provided, the number of edges in one electrical angle cycle is greater than in the case of one set of three-phase windings, so the command rotation direction is the reverse rotation direction. It can be determined earlier.

  The MG 40 is applied to the ISG 30 and can start the engine 11 and can be driven by the engine 11 to generate electric power. In the present embodiment, it is possible to determine at an early stage that the MG 40 is going to be reversely rotated, and when the reverse rotation of the MG 40 is not permitted and the command rotation direction is the reverse rotation direction, the MG 40 is stopped. ing. Thereby, it is possible to prevent the engine 11 from performing reverse explosion or the vehicle 100 from running backward due to the reverse rotation unintended by the MG 40.

(Second Embodiment)
A second embodiment of the present invention is shown in FIGS.
As shown in FIGS. 7 and 8, the ISG 130 of this embodiment includes an MG 140, a driver unit 147, an ISG control unit 70, and the like.
The MG 140 of the present embodiment has a set of three-phase windings 43. The three-phase winding 43 of this embodiment is the same as the first three-phase winding 41 of the first embodiment, and the driver unit 147 is the same as the first driver unit 47 of the first embodiment. That is, the ISG 130 of the present embodiment is the same as that in which the second three-phase winding 42 and the second driver unit 48 in the ISG 30 of the first embodiment are omitted.

The three-phase winding 43 includes a U-phase coil 431, a V-phase coil 432, and a W-phase coil 433.
The driver unit 147 has an inverter unit 150. In FIG. 8, the inverter unit 150 is described as “INV”.
The inverter unit 150 includes six SW elements 151 to 156. By controlling the on / off operation of the SW elements 151-156, the three-phase voltages Vu, Vv, Vw are applied to the three-phase winding 43. In addition, diodes 161 to 166 are provided in the SW elements 151 to 156, respectively.
The signal generation unit 71 generates energization command signals U_com, V_com, and W_com that control the on / off operation of the SW elements 151 to 156 and outputs the generated energization command signals U_com, V_com, and W_com.
The details of the connection relationship between the three-phase winding 43 and the inverter unit 150, the on / off operation of the SW elements 151 to 156 according to the energization command signal, and the like are the same as in the above embodiment, and thus the description thereof is omitted.

As shown in FIG. 9, the three-phase winding 43 is arranged in the order of the U-phase coil 431, the V-phase coil 432, and the W-phase coil 433 in the positive rotation direction. When the MG 140 is rotated in the forward rotation direction, the SW elements 151 to 153 on the high potential side are turned on in the order of the U phase, the V phase, and the W phase.
On the other hand, when the MG 140 is rotated in the reverse rotation direction, the SW elements 151 to 153 on the high potential side are turned on in the order of the W phase, the V phase, and the U phase.

FIG. 10 shows energization command signals U_com, V_com, and W_com when the command rotation direction is the reverse rotation direction.
As shown in FIG. 10, the energization command signals U_com, V_com, and W_com are the same as the energization command signals U1_com, V1_com, and W1_com of the first embodiment. That is, in one electrical angle cycle, when viewed as a whole, a total of six edges are included every 60 °.

When the command rotation direction is the reverse rotation direction, the phase order of the edges is as shown by the arrows in FIG. 10, and the U phase LH edge (0 °), the V phase HL edge (60 °), and the W phase LH Edge (120 °), U phase HL edge (180 °), V phase LH edge (240 °), W phase HL edge (300 °). In this embodiment, as in the above embodiment, the rotation direction determination unit 72 detects the phase order of the edges, and the state where the command rotation direction is the reverse rotation direction is continued for a predetermined period (or a predetermined number of times). In this case, it is determined that the command rotation direction is the reverse rotation direction.
The MG 140 of the present embodiment has a set of three-phase windings 43.
Even if comprised in this way, there exists an effect similar to the said embodiment.

(Other embodiments)
The rotating electrical machine of the above embodiment is used for ISG. In other embodiments, the rotating electrical machine may be used in a device other than ISG. Further, the rotating electrical machine may not function as a generator but may function only as an electric motor. In the above embodiment, the field winding is wound around the rotor. In other embodiments, the field winding may be omitted.
In the above embodiment, the rotating electrical machine has one set or two sets of three-phase windings. In another embodiment, the winding of the rotating electrical machine is not limited to a three-phase winding, and may be four or more phases. Further, the number of winding sets may be three or more.

In the above-described embodiment, the reverse rotation allowance determining unit determines whether or not the rotating electrical machine can be reversely rotated based on the mode command from the engine ECU that is the host control unit. In another embodiment, the reverse rotation allowance determining unit may determine whether or not the reverse rotation is allowed without depending on the mode command from the engine ECU.
As mentioned above, this invention is not limited to the said embodiment at all, In the range which does not deviate from the meaning of invention, it can implement with a various form.

11 ... Engine 30, 130 ... ISG
40, 140 ... motor generator (rotary electric machine)
50, 60, 150 ... Inverter part 51-56, 61-66, 151-156 ... Switching element 70 ... ISG control part (rotary electric machine control device)
71 ... Signal generation unit 72 ... Rotation direction determination unit 73 ... Reverse rotation allowance determination unit 74 ... Output prohibition determination unit 80 ... Engine ECU (upper control unit)

Claims (5)

A rotating electrical machine control device for controlling a rotating electrical machine (40, 140) to which electric power is converted by an inverter unit (50, 60, 150),
Signal generation that controls the on / off operation of the switching elements (51 to 56, 61 to 66, 151 to 156) of the inverter unit, and generates a rectangular wave energization command signal according to the rotation angle of the rotating electrical machine. Part (71);
A rotation direction determination unit (72) that acquires the energization command signal output to the inverter unit and determines a command rotation direction that is a direction in which the rotating electrical machine is to be rotated based on the energization command signal;
A reverse rotation allowance determining unit (73) for determining whether or not the rotating electrical machine may be rotated in reverse.
An output prohibition determination unit (74) for stopping the rotating electrical machine when reverse rotation of the rotating electrical machine is not permitted and the command rotational direction is the reverse rotational direction;
A rotating electrical machine control device comprising:   2. The rotating electrical machine control device according to claim 1, wherein the reverse rotation allowance determining unit determines whether or not the rotating electrical machine can be reversely rotated based on a command from an upper control unit. The rotating electrical machine (40) has two sets of three-phase windings (41, 42),
The rotating electrical machine control device according to claim 1 or 2, wherein the inverter unit (50, 60) is provided for each of the three-phase windings.   The rotating electrical machine control device according to claim 1 or 2, wherein the rotating electrical machine (140) has a set of three-phase windings (43).   The rotating electrical machine control device according to any one of claims 1 to 4, wherein the rotating electrical machine is capable of starting an engine (11) and being driven by the engine to generate electric power.

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