JP2009044804A - Electric motor controller - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electric motor controller having characteristic in which a phase is stable at a weak phase position and capable of immediately changing the phase even at the time of low-temperature start-up. <P>SOLUTION: The controller is provided with a hydraulic mechanism for supplying or discharging a working oil to or from a delay angle side working chamber for relatively rotating a rotor to hold it at a strong phase position strengthening a composite magnetic flux by a magnetic piece and an advance angle side working chamber for holding the rotor at a weak phase position for weakening the composite magnetic flux. If it is judged that an electric motor, more specifically, a combustion engine is stopped (S10), the hydraulic mechanism is operated so that the working oil is supplied and discharged to and from the delay angle side and advance angle side working chambers to reciprocate the rotor between the strong phase position and the weak phase position and the working oil in the advance angle side working position can be discharged (S18 to S38). <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an electric motor control device, and more specifically, an electric motor equipped with a phase change mechanism for changing the phase indicating the relative rotation angle or displacement angle of two magnetized rotors by relative rotation. The present invention relates to a control device.

  As an example of a motor control device in which two magnetized rotors are rotated relative to each other to change the relative displacement angle or the phase indicating the displacement angle, a technique described in Patent Document 1 below is given. be able to. In the technique described in Patent Document 1, when the phase of the two rotors is changed according to the rotational speed of the electric motor, the two rotations are performed via a member that is displaced along the radial direction by the action of centrifugal force. One of the children is configured to relatively rotate in the circumferential direction.

Also, when the phase is changed according to the speed of the rotating magnetic field generated in the stator, the control current is supplied to the stator winding while the two rotors maintain the rotating speed due to inertia, and the rotating magnetic field speed is increased. By changing, the relative position in the circumferential direction is changed.
JP 2002-204541 A

  By the way, when this type of electric motor is mounted on a hybrid vehicle, if it has a characteristic that stabilizes at a weak phase position (or a position near the middle of the strong phase position and the weak phase position), the phase is on the weak side when starting the internal combustion engine. For this reason, there is a possibility that a desired start driving force cannot be obtained unless it is changed to the stronger side. In that case, if the temperature is low, even if the working fluid is supplied to the working chamber on the stronger phase holding side and the phase is changed, the discharge resistance of the working fluid remaining in the working chamber on the weaker phase holding side is high. It takes time to make changes, which may reduce driving feeling.

  Accordingly, an object of the present invention is to eliminate the above-described problems, and in an electric motor having a characteristic in which the phase is weak and stabilized at a position near the middle of the weak phase position and the weak phase position, even when the motor is started at a low temperature. An object of the present invention is to provide an electric motor control device capable of quickly changing the phase.

  In order to achieve the above object, according to the first aspect, the first rotor is arranged such that the longitudinal direction of the magnet piece is directed in the radial direction, and the longitudinal direction of the magnet piece is the circumferential direction. When the working fluid is supplied to the second rotor arranged so as to face, the first and second rotors are rotated relative to each other and held at a strong phase position where the combined magnetic flux by the magnet pieces is strengthened. When the working fluid is supplied to the first working chamber, the second working chamber holds the first and second rotors in a weak phase position where the combined magnetic flux generated by the magnet pieces is weakened by relative rotation of the first and second rotors. The working fluid storage source and the first and second working chambers are connected by a flow path, and the working fluid of the storage source is pumped to the first and second working chambers through the flow path. Supply flow or discharge from the first and second working chambers to return to the storage source In a control device for controlling the operation of the working fluid supply / discharge mechanism of an electric motor having at least a supply / discharge mechanism, the working fluid in the second working chamber is discharged when the electric motor is stopped. A working fluid supply / discharge mechanism operation control means for operating the working fluid supply / discharge mechanism is provided.

  In the electric motor control device according to claim 2, the working fluid supply / discharge mechanism operation control means supplies and discharges the working fluid to the first and second working chambers when the electric motor is stopped. Thus, the working fluid supply / discharge mechanism is operated such that the working fluid in the second working chamber is discharged by reciprocating between the strong phase position and the weak phase position.

  In claim 3, the first rotor is arranged such that the longitudinal direction of the magnet piece is directed in the radial direction, and the second rotor is arranged such that the longitudinal direction thereof is directed in the circumferential direction. A rotor, a first working chamber that holds the first and second rotors in a relatively phase position where the combined magnetic flux generated by the magnet pieces is strengthened by relatively rotating the first and second rotors when the working fluid is supplied; A second working chamber for holding the fluid in a weak phase position where the first and second rotors are rotated relative to each other to weaken the resultant magnetic flux by the magnet pieces, and a working fluid storage source; The first and second working chambers are connected by a flow path, and the working fluid of the storage source is pumped and supplied to the first and second working chambers via the flow path or the first and second working chambers. At least a working fluid supply / discharge mechanism that discharges from the working chamber and returns to the storage source. In the control device for controlling the operation of the working fluid supply / discharge mechanism of the electric motor, when the electric motor is stopped and the temperature corresponding to the temperature of the working fluid is less than a predetermined value, the working fluid is supplied to the first fluid. The hydraulic fluid supply / discharge mechanism operation control means for operating the hydraulic fluid supply / discharge mechanism to close the flow path after being supplied to the hydraulic chamber is provided.

  In the motor control device according to claim 4, the working fluid supply / discharge mechanism is disposed in the flow path, and a valve body of the first position supplies the working fluid to the second working chamber; And a second position for supplying the working fluid to the first working chamber, and a switching valve movable to an intermediate position between the first position and the second position, and the working fluid supply / discharge mechanism operation control. The means drives the valve body of the switching valve to the second position and then drives to the intermediate position, and thus closes the flow path after supplying the working fluid to the first working chamber. The working fluid supply / discharge mechanism is configured to operate.

  The electric motor control device according to claim 5, further comprising a heater for raising the temperature of the working fluid, wherein the working fluid supply / discharge mechanism operation control means has a temperature corresponding to the temperature of the working fluid less than the predetermined value. The heater is operated to raise the temperature of the working fluid.

  In the above, “the temperature corresponding to the temperature of the working fluid” means that the temperature of the working fluid itself, the temperature of the internal combustion engine, or the outside air temperature may be used.

  In claim 1, when the working fluid is supplied, the first working chamber is held in a strong phase position where the first and second rotors are relatively rotated to increase the combined magnetic flux by the magnet pieces, Conversely, the second working chamber is held in a weakening phase position where the combined magnetic flux is weakened, and the working fluid is supplied to the first and second working chambers or discharged from the first and second working chambers to return to the storage source. In the control device for controlling the operation of the working fluid supply / discharge mechanism of the electric motor including at least the working fluid supply / discharge mechanism, the working fluid is discharged so that the working fluid in the second working chamber is discharged when the electric motor is stopped. Since it is configured to include operation fluid supply / discharge mechanism operation control means for operating the supply / discharge mechanism, the electric motor has a characteristic that is stable at a weak phase position or a position near the middle of the weak phase position and the weak phase position, and at low temperature start Because , It is possible to quickly change the phase to strengthen the side. Therefore, a desired start driving force can be quickly obtained even when the hybrid vehicle is mounted as a drive source, and the driving feeling is not reduced.

  That is, when the phase is changed by relatively rotating the first and second rotors, the first and second working chambers must be structured to be discharged from the other in order to supply the working fluid to one of them. However, in that case, by operating the working fluid supply / discharge mechanism so that the working fluid in the second working chamber is discharged when the electric motor is stopped, the electric motor has a weak phase position or a strong phase position. In addition to being stable at a position near the middle of the weaker phase position, it is possible to quickly change the phase to the stronger side even during cold start.

  In the motor control device according to claim 2, when the motor is stopped, the working fluid is supplied to and discharged from the first and second working chambers to reciprocate between the strong phase position and the weak phase position. Therefore, since the working fluid supply / discharge mechanism is operated so that the working fluid in the second working chamber is discharged, in addition to the effect described in claim 1, the second fluid can be output when the motor is stopped. The working fluid in the working chamber is surely discharged, and the phase can be changed to the stronger side more quickly at the start.

  In claim 3, when the working fluid is supplied, the first working chamber is held in a strong phase position where the first and second rotors are relatively rotated and the resultant magnetic flux by the magnet pieces is strengthened; Conversely, the second working chamber that holds the weakening phase position where the combined magnetic flux is weakened, the working fluid storage source and the first and second working chambers are connected by a flow path, and the working fluid of the storage source is pumped. A working fluid supply / discharge mechanism for an electric motor including at least a working fluid supply / discharge mechanism that supplies the first and second working chambers through the flow path or discharges them from the first and second working chambers to return them to the storage source. In the control device for controlling the operation of the above, when the electric motor is stopped and the temperature corresponding to the temperature of the working fluid is less than a predetermined value, the working fluid is supplied to the first working chamber and then the flow path is closed. Working fluid supply / discharge mechanism operation control Since it is configured to include the means, it is possible to hold the phase on the stronger side or in the vicinity thereof by using the state when the temperature of the working fluid decreases and becomes highly viscous over time after stopping. In addition, the electric motor has a characteristic that is stable at a weak phase position or a position near the middle between the strong phase position and the weak phase position, and the phase can be quickly changed to the strong side even at the time of low temperature start. Therefore, a desired start driving force can be quickly obtained even when the hybrid vehicle is mounted as a drive source, and the driving feeling is not reduced.

  In the control device for the electric motor according to claim 4, the valve body is disposed in the flow path, and the valve body has a first position for supplying the working fluid to the second working chamber, and a second position for supplying the first working chamber to the second working chamber. The working fluid supply / discharge mechanism operation control means drives the valve body of the switching valve to the first position and then drives to the intermediate position, and thus the working fluid. Since the working fluid supply / discharge mechanism is operated so as to close the flow path after supplying the first working chamber to the first working chamber, in addition to the effect described in claim 3, the phase at the time of stopping is increased or in the vicinity thereof. Therefore, the phase can be changed to the stronger side at the time of starting more quickly.

  The electric motor control device according to claim 5 includes a heater that raises the temperature of the working fluid, and when the temperature corresponding to the temperature of the working fluid is less than a predetermined value, the heater is activated to raise the temperature of the working fluid. In addition to the effects described in claims 1 to 4, the discharge resistance of the working fluid can be reduced and the phase can be changed more quickly.

  The best mode for carrying out the motor control device according to the present invention will be described below with reference to the accompanying drawings.

  FIG. 1 is a schematic diagram showing the overall configuration of an electric motor control apparatus according to a first embodiment of the present invention. For simplification of illustration, the illustration of the sensor and the actuator is omitted in FIG.

  In FIG. 1, reference numeral 10 denotes an electric motor. More specifically, the electric motor 10 includes a brushless motor or an AC synchronous motor. Reference numeral 12 denotes a gasoline injection spark ignition type 4-cylinder engine (internal combustion engine), and its output is input to the transmission 16 via the drive shaft 14. The transmission 16 is composed of an automatic transmission, and is connected to drive wheels 20 of a hybrid vehicle (not shown) on which the electric motor 10 and the engine 12 are mounted, shifts engine output, and transmits it to the drive wheels 20 to transmit the hybrid vehicle. Let it run.

  The electric motor 10 and the engine 12 are connected to the transmission 16 via a clutch (not shown). The electric motor 10 always rotates when the engine 12 rotates, and is energized at the time of starting to crank and start the engine 12, and is also energized at the time of acceleration or the like to assist the rotation of the engine 12 (acceleration). When the electric motor 10 is not energized, the motor 10 idles as the engine 12 rotates, and at the time of deceleration when the fuel supply to the engine 12 is stopped, the kinetic energy generated by the rotation of the drive shaft 14 is converted into electric energy and output. It functions as a generator having a function. Thus, in this embodiment, the electric motor 10 is mounted on a vehicle (parallel hybrid vehicle) as a drive source together with the engine 12.

  The electric motor 10 is connected to a battery 24 via a power drive unit (referred to as “PDU”) 22. The PDU 22 includes an inverter, converts direct current (electric power) supplied (discharged) from the battery 24 to alternating current and supplies the alternating current to the electric motor 10, and converts alternating current generated by the regenerative operation of the electric motor 10 into direct current and converts the direct current (electric power) into direct current. To supply. In this way, driving / regeneration of the electric motor 10 is controlled via the PDU 22.

  Further, an engine control unit (referred to as “ENGECU”) 26 that controls the operation of the engine 12, a motor control unit (referred to as “MOTECU”) 30 that controls the operation of the electric motor 10, and a state of charge (SOC) of the battery 24. A battery control unit (referred to as “BATECU”) 32 that calculates charge and discharge and the like, and a shift control unit (referred to as “T / MECU”) that controls the operation of the transmission 16 are provided.

  All the ECUs (electronic control units) such as the above-described ENGECU 26 are composed of a microcomputer, and are connected to each other via a communication bus 36 so as to be able to communicate with each other. Further, all ECUs such as the ENGECU 26 are configured to be operated by being energized from the battery 24 even after the engine 12 is stopped.

  2 is a cross-sectional view of the main part of the electric motor 10 shown in FIG. 1, FIG. 3 is an exploded perspective view showing the phase changing mechanism of the electric motor shown in FIG. 2, and FIG. 4 shows the orientation of the magnetic poles of the rotor magnet shown in FIG. FIG. 5 and FIG. 5 are side views of the rotor of the electric motor 10 shown in FIG.

  As shown in the figure, the electric motor 10 includes an annular stator (stator) 40, a similarly annular rotor 42 housed therein, and a rotation shaft (rotation axis) 44. The stator 40 is formed by laminating thin plates manufactured from iron-based materials (or casting iron-based materials), and is arranged with three-phase (U, V, W-phase) stator windings 40a.

  The rotor 42 includes an outer peripheral side (first) rotor 42 a and an inner peripheral side (second) rotor 42 b that is relatively displaceable about a rotating shaft (rotating axis) 44. The rotors 42a and 42b are made of, for example, an iron core made of sintered metal, and a plurality of, more specifically 16 sets of elongated magnet pieces (permanent magnets) 46a and 46b are slightly connected to each other on the circumferential side. Are arranged at a certain interval.

  More specifically, as shown in FIG. 5, 16 sets of magnet pieces 46a are arranged on the rotor 42a on the outer peripheral side so that the longitudinal direction of the magnet pieces 46a faces the radial direction of the rotor 42a, The inner peripheral rotor 42b has 16 sets of magnet pieces 46b, and the longitudinal direction of the magnet pieces 46b faces the circumferential direction of the rotor 42a, and thus has a U-shape or C-shape in plan view with the magnet pieces 46a. Are arranged as follows.

  As shown in FIG. 3, the rotor 42 is provided with a phase changing mechanism 50. The phase changing mechanism 50 includes a vane rotor 52 that is fixed to the rotating shaft 44 via a spline (not shown), an annular housing 54 that is fitted and fixed to the inner peripheral surface of the rotor 42b on the inner peripheral side, A pair of drive plates 56 that fix the vane rotor 52 to the rotor 42a on the outer peripheral side with pins 56a, and a hydraulic mechanism (working fluid supply / discharge mechanism that supplies working oil (working fluid, more specifically, hydraulic pressure) to them. (Described later).

  The vane rotor 52 is formed with a plurality of (six) vanes 52a protruding from the central boss portion at equal intervals in the radial direction, and protrudes at equal intervals to the center side inside the annular housing 54. A plurality (six) of partition walls 54a are formed. Seal members 52b and 54b are disposed at the tips of the vane 52a and the partition wall 54a, respectively, and provide a fluid-tight seal between the vane 52a and the inner wall surface of the annular housing 54 and between the partition wall 54a and the outer peripheral surface of the boss portion of the vane rotor 52. .

  As shown in FIG. 2, the annular housing 54 has an axial length (width) larger than that of the rotor 42b on the inner peripheral side, and an annular groove 56b (FIG. 3) formed in the two drive plates 56. The annular housing 54 and the inner peripheral rotor 42b are rotatably supported by the outer peripheral rotor 42a and the rotating shaft 44.

  The two drive plates 56 are slidably brought into close contact with both side surfaces of the annular housing 54, and a plurality of (6) sealed spaces are formed between the partition wall 54 a of the annular housing 54 and the outer peripheral surface of the boss portion of the vane rotor 52. )Form. This sealed space is divided into two by the vane 52a of the vane rotor 52 to form an advance side working chamber (second working chamber) 54c and a retard side working chamber (first working chamber) 54d. Here, the “advance angle” (ADV) means that the inner rotor 42b is moved in the same direction as the rotation direction of the electric motor 10 indicated by the arrow ADV (FIG. 5) with respect to the outer rotor 42a. “Angle” (RTD) means rotating in the opposite direction.

  The advance side working chamber 54c and the retard side working chamber 54d have a working fluid, specifically an incompressible fluid, more specifically an ATF (Automatic Transmission Fluid) of the transmission 16 or a lubricating oil of the engine 12. Of hydraulic oil is supplied. The hydraulic oil is supplied from the rotating shaft 44 to the advance side working chamber 54c and the retard side working chamber 54d through two oil passages 62 and 64 formed in the vane rotor 52.

  The oil passages 62 and 64 are substantially parallel to each other, and as shown in FIGS. 2 and 5, the oil passages 62 a and 64 a drilled in the axial direction of the rotation shaft 44 and the outer peripheral surface of the rotation shaft 44 continuously therewith. The oil passages 62b and 64b are formed, and 62c and 64c are formed radially in the boss portion of the vane rotor 52 continuously. The oil passage 62 is connected to the advance side working chamber 54c, and the oil passage 64 is connected to the retard side working chamber 54d, and hydraulic oil is supplied to and discharged from a reservoir described later.

  The advance-side working chamber 54c and the retard-side working chamber 54d expand and contract by being supplied and discharged with hydraulic oil, so that the inner periphery integrated with the partition wall 54a with respect to the vane 52a fixed to the outer rotor 42a. The phase of the relative displacement angle between the outer peripheral rotor 42a and the inner peripheral rotor 42b is reduced from 0 degrees by the relative rotation of the side rotor 42b about the rotation axis (rotation axis) 44. It is changed between 180 degrees, and the induced voltage of the electric motor 10 is changed accordingly.

  Thus, when the phase is changed by relatively rotating the outer rotor 42a and the inner rotor 42b, the advance side working chamber 54c and the retard side working chamber 54d are supplied with hydraulic oil in one of them. In order to supply, the structure must be discharged from the other side.

  FIG. 5 shows the advance side working chamber 54c and the retard side working chamber 54d at the most advanced position. When in the advanced position, hydraulic fluid is supplied to the advanced working chamber 54c, while hydraulic fluid is discharged from the retarded working chamber 54d, but in the most advanced position, the advanced working chamber 54c is While expanding to the maximum limit, the retard side working chamber 54d contracts to the maximum limit. Although detailed illustration is omitted, when in the most retarded position, the retard side working chamber 54d expands to the maximum extent, while the advance side working chamber 54c contracts to the maximum extent.

  In the electric motor 10 according to this embodiment, as shown in FIG. 4A, the magnet pieces 46a of the outer rotor 42a and the magnet pieces 46b of the inner rotor 42b have the same polarity. When the phase is in the same polarity arrangement, the combined magnetic flux of both is strengthened field (field increases) (in other words, in the strengthened phase position). On the other hand, as shown in FIG. 4B, when the magnet piece 46a of the rotor 42a on the outer peripheral side and the magnet piece 46b of the rotor 42b on the inner peripheral side are in a phase where the different poles are opposed to each other, The resulting magnetic field is weakened (the field is reduced) (in other words, at the weakening phase position).

  The phase of the outer rotor 42a and the inner rotor 42b can be changed between 0 degrees and 180 degrees in electrical angle so that a desired combined magnetic flux can be obtained. The 180 degree side is the advance side. FIG. 4A shows the same-pole arrangement of the magnet pieces 46a and 46b at 0 degree (most retarded angle position). At this time, the field is strengthened most. On the other hand, FIG. 4B shows the counter electrode arrangement of the magnet pieces 46a and 46b at 180 degrees (most advanced angle position), and at this time, the field is weakened most.

  Thereby, the induced voltage constant Ke of the electric motor 10 is changed, and the characteristics of the electric motor 10 are changed. That is, when the induced voltage constant Ke increases due to the strong field, the allowable rotational speed at which the motor 10 can operate decreases, but the maximum torque that can be output increases, and conversely, when the induced voltage constant Ke decreases due to the weak field. The maximum torque that can be output decreases, and the allowable rotational speed increases.

  In the electric motor 10 according to this embodiment, when the inner circumferential side rotor 42b is at the most advanced angle position (phase 180 degrees) with respect to the outer circumferential side rotor 42a, in other words, when it is in a weaker phase. Stabilize. That is, when hydraulic pressure is not supplied, the rotor 42 is relatively displaced by itself toward the most advanced position, and stops at that position.

  FIG. 6 is a hydraulic circuit diagram of the above-described hydraulic mechanism (indicated by reference numeral 70) that supplies hydraulic oil to the advance side working chamber 54c and the retard side working chamber 54d via the oil passages 62 and 64.

  As shown in the figure, the hydraulic mechanism 70 includes a hydraulic pump 70d that pumps hydraulic oil from a reservoir (tank; hydraulic oil storage source) 70a through a filter 70b, increases the pressure, and outputs the hydraulic pressure to an oil passage 70c. A switching valve 70e that is switchably connected to either the advance side working chamber 54c or the retard side working chamber 54d through the oil passages 62, 64, and the oil passage 70c, and is inserted through the switching valve 70e. It includes a flow rate adjusting valve 70f that adjusts the flow rate of hydraulic oil supplied to the advance side working chamber 54c and the retard side working chamber 54d, and the above-described MOTECU (motor control unit) 30 that controls the operation thereof.

  The switching valve 70e is a 4-port valve (direction switching valve). A linear solenoid valve 70g for switching the port is connected to the switching valve 70e. The linear solenoid valve 70g is interposed between the hydraulic pump 70d and the switching valve 70e in the oil passage 70c, and includes an electromagnetic solenoid 70g1. By exciting and demagnetizing the electromagnetic solenoid 70g1, the spool (valve element) operates. It is possible to switch between a first position where oil, more specifically oil pressure, acts on the spool (not shown) of the switching valve 70e and a second position where the hydraulic oil is drained. A broken line indicates a relief valve system.

  In the switching valve 70e, the spool (valve element) connects the oil passage 70c to the advance side working chamber 54c via the oil passage 62 to supply hydraulic oil, while the retard side working chamber 54d is set to the drain side. The first position where the hydraulic oil is connected and discharged, and the oil passage 70c is connected to the retard side working chamber 54d via the oil passage 64 to supply the hydraulic oil, while the advance side working chamber 54c is set to the drain side. It is configured to be switchable between a second position for connecting and draining (draining) hydraulic oil and an intermediate (neutral) position for closing the four ports and holding the hydraulic oil between them. . The spool is biased to the second position by the spring 70e1.

  Specifically, when the hydraulic pressure is not applied from the linear solenoid valve 70g, the second position is selected for the spool of the switching valve 70e, and the intermediate position is selected when a relatively small hydraulic pressure is applied from the linear solenoid valve 70g. When the large hydraulic pressure is applied from the linear solenoid valve 70g, the first position is selected.

  The flow rate adjusting valve 70f is also a linear solenoid valve, and includes an electromagnetic solenoid 70f1 and PWM control of the electromagnetic solenoid 70f1 allows hydraulic oil to be supplied to the advance side working chamber 54c and the like via the switching valve 70e. Between the first position where the hydraulic oil is drained and the second position where the hydraulic oil is drained is configured to be switchable, and the hydraulic oil having a flow rate corresponding to the switched position is output to the oil passage 70c. Adjust the flow rate of hydraulic oil. A broken line shows a relief valve system.

  The hydraulic oil in the oil passage 70c whose flow rate is adjusted by the flow rate adjusting valve 70f is supplied to the advance side working chamber 54c or the retard side working chamber 54d via the switching valve 70e. As described above, when the hydraulic fluid is supplied, the advance side working chamber 54c expands according to the flow rate thereof, and the phase is set to an arbitrary position between the most advanced position (180 degrees) and the intermediate position (90 degrees). When the hydraulic oil is supplied, the retard side working chamber 54d also expands according to the flow rate, and the phase is between the intermediate position (90 degrees) and the most retarded position (0 degrees). Change to any position.

  As shown at the end of FIG. 6, the hydraulic pump 70d is connected to the second electric motor 70j and is driven by the second electric motor 70j. The second electric motor 70j is connected to an inverter circuit (INV) 70k.

  A temperature sensor 70m is disposed between the reservoir 70a and the filter 70b, and generates a temperature corresponding to the temperature of the hydraulic oil, specifically, the hydraulic oil temperature itself, that is, an output indicating the oil temperature. The output of the temperature sensor 70m is sent to the MOTECU 30.

  A phase sensor 70n is disposed at an appropriate position in the vicinity of the advance side or retard side working chambers 54c, 54d of the electric motor 10, and generates an output corresponding to the actual phase value θ. The output of the phase sensor 70n is also sent to the MOTECU 30.

  A heater 72 is disposed at an appropriate position in the oil passage 70c and inside the reservoir 70a. The heater 72 is connected to the battery 24 and raises the temperature of the hydraulic oil when energized from the battery 24.

  The MOTECU 30 controls the operation of the electric motor 10 via the inverter of the PDU 22 and changes (controls) the phase via the phase changing mechanism 50 based on the rotational speed of the electric motor 10 and the like. More specifically, the MOTECU (control means) 30 excites and demagnetizes the linear solenoid 70g and the electromagnetic solenoids 70g1 and 70f1 of the flow rate adjusting valve 70f based on the output of the phase sensor 70n and the like.

  Further, the MOTECU 30 controls the operation of the inverter circuit 70k, and accesses the BAT ECU 32 that is communicably connected via the bus 36 in accordance with the oil temperature detected by the temperature sensor 70m, and causes the heater 24 to energize from the battery 24. Is operated (ON), or the operation is stopped (OFF).

  Here, to reiterate the problem of the present invention, when the motor 10 is mounted on a hybrid vehicle, when the engine 10 has a characteristic that stabilizes at a weak phase position, the phase is on the weak side when the engine 12 is started. Otherwise, a situation in which a desired start driving force cannot be obtained may occur. In this case, if the temperature is low, the hydraulic oil remaining in the advance side working chamber 54c on the weak phase holding side may be changed even if the phase is changed by supplying the hydraulic oil to the retard side working chamber 54d on the strong phase holding side. Since the discharge resistance is high, it takes time to change the phase and the driving feeling may be reduced.

  Accordingly, an object of the present invention is to eliminate the above-described problems. In the electric motor 10 that is mounted on a hybrid vehicle and includes a phase changing mechanism 50 and has a characteristic that the phase is weakened and stabilized at the phase position, at the time of cold start An object of the present invention is to provide a control device for the electric motor 10 that can change the phase promptly even if it exists.

  FIG. 7 is a flowchart showing the operation of the control device, more specifically, the operation of the MOTECU 30.

  In the following description, it is determined in S10 whether or not the ignition switch of the engine 12 is turned off (IGOFF) by the driver, in other words, whether or not the engine 12 (and the vehicle) is stopped. This is determined by accessing the ENGECU 26 communicatively connected via the bus 36.

  As described above, since the electric motor 10 and the engine 12 are directly connected, determining whether the engine 12 is stopped is equivalent to determining whether the electric motor 10 is stopped. 7 is executed by the MOTECU 30 periodically, for example, every 1.0 min when the ignition switch of the engine 12 is turned off and stopped.

  When the result in S10 is affirmative, the program proceeds to S12, and it is determined whether or not the bit of the discharge end flag is 1. Since the initial value of this flag bit is 0, the determination in S12 is generally denied and the process proceeds to S14, where a value corresponding to 3 sec is set in the check timer (down counter), and the down count (time measurement) is started. .

  Next, in S16, a full RTD is commanded. That is, the second electric motor 70j is energized to start driving the hydraulic pump 70d, the electromagnetic solenoid 70g1 of the linear solenoid valve 70g is demagnetized, the spool of the switching valve 70e is switched to the second position, and the oil passage 70c is retarded. In addition to being connected to the side working chamber 54d, the advance side working chamber 54c is connected to the drain side, so that hydraulic oil is supplied to the retarding side working chamber 54d and the rotor 42 is moved to the most retarded position (phase 0 degree, stronger). (Phase position).

  Next, the process proceeds to S18, in which it is determined whether the value of the check timer has reached 0, specifically, whether 3 seconds have elapsed since the rotor 42 has been driven to the most retarded position. At the same time, if the result is affirmative, the process proceeds to S20, the value corresponding to 3 sec is set again in the check timer, the process proceeds to S22, and full ADV is commanded.

  That is, the solenoid solenoid 70g1 of the linear solenoid valve 70g is excited to switch the spool of the switching valve 70e to the first position, the oil passage 70c is connected to the advance side working chamber 54c, and the retard side working chamber 54d is connected to the drain side. Therefore, hydraulic oil is supplied to the advance side working chamber 54c to drive the rotor 42 to the most advanced position (phase 180 degrees, weak phase position).

  Next, the process proceeds to S24, in which it is determined whether or not the value of the check timer has reached 0, specifically, whether or not 3 seconds have elapsed since the rotor 42 was driven to the most advanced angle position. At the same time, if the result is affirmative, the process proceeds to S26, the value corresponding to 3 seconds is again set in the check timer, the process proceeds to S28, and full RTD is commanded again to drive the rotor 42 to the most retarded position (phase 0 degree). To do.

  Next, the process proceeds to S30, where it is determined whether or not the value of the check timer has reached 0. When the result is negative, the process returns to S28, and when the result is positive, the process proceeds to S32, and the bit of the discharge end flag is set to 1. Thus, setting the bit of this flag to 1 means that the hydraulic oil is supplied to and discharged from the advance side working chamber 54c and the retard side working chamber 54d as described above, and the rotor 42 is moved to the most retarded position, It means that the process of reciprocating between the most advanced position and the most retarded position and driving, in other words, between the strong phase position and the weak phase position is completed. Although illustration is omitted, thereafter, the operations of the second electric motor 70j and the hydraulic pump 70d are stopped.

  When the result in S10 is negative, the program proceeds to S34, the flag bit is reset to 0, and the program proceeds to S36, where the oil temperature (temperature corresponding to the temperature of the hydraulic oil detected by the temperature sensor 70m) is a predetermined value. It is determined whether or not β ° C. (for example, −10 ° C.) or higher. The same applies when affirmative in S12.

  When the result in S36 is negative, in other words, when the oil temperature is lower than the predetermined value, the process proceeds to S38, and the heater 72 is activated (turned on). When the result in S36 is affirmative, the process proceeds to S40, and the heater 72 is energized. Stop the operation (OFF).

  In this embodiment, as described above, when hydraulic oil (working fluid) is supplied, the outer peripheral side (first) rotor 42a and the inner peripheral side (second) rotor 42b are relatively rotated. The retarded side (first) working chamber 54d is held at a strong phase position where the combined magnetic flux by the magnet pieces 46a and 46b is strengthened, and the advanced angle side (second) is held at the weak phase position where the combined magnetic flux is weakened. ) The working chamber 54c and the hydraulic oil are supplied to the retarded-side working chamber 54d and the advanced-side working chamber 54c or discharged from the retarded-side working chamber 54d and the advanced-side working chamber 54c to return to the reservoir (storage source) 70a. A MOTEC (control device) 30 for controlling the operation of the hydraulic mechanism 70 of the electric motor 10 mounted on the vehicle as a drive source together with the engine (internal combustion engine) 12. Electric motor 10 ( More specifically, when the engine 12) is stopped, the hydraulic mechanism 70 is operated so that the hydraulic oil in the advance side working chamber 54c is discharged (S10 to S32), that is, the working fluid supply / discharge mechanism operation. Since the control means is provided, the electric motor 10 has the characteristic that it is stabilized at the weak phase position, and there is no residual oil in the advanced angle working chamber 54c on the weak side even at the time of low temperature start. When 12 is started, the phase can be quickly changed to the stronger side. Therefore, even when mounted on a hybrid vehicle as a drive source together with the engine (internal combustion engine) 12, a desired starting driving force can be quickly obtained, and the driving feeling is not reduced.

  That is, when the phase is changed by relative rotation of the outer rotor 42a and the inner rotor 42b, the retard-side working chamber 54d and the advance-side working chamber 54c supply hydraulic oil to one of them. In this case, the hydraulic oil in the advance side working chamber is discharged when the electric motor 10 (more specifically, the engine 12) is stopped. By operating the hydraulic mechanism 70, the electric motor 10 has the characteristic of being stabilized at the weak phase position, and the phase can be quickly changed to the strong side even at the time of cold start.

  More specifically, when the engine 12 is stopped, the hydraulic oil is supplied to and discharged from the retard side working chamber 54d and the advance side working chamber 54c to reciprocate between the strong phase position and the weak phase position. Since the hydraulic mechanism 70 is configured to operate so that the hydraulic oil in the advance side working chamber 54c is discharged, in addition to the effects described above, the advance side working chamber 54c can be operated when the engine 12 is stopped. The hydraulic oil is surely discharged, and therefore the phase can be changed to the stronger side more quickly when the engine 12 is subsequently started.

  In this embodiment, the electric motor 10 has the characteristic of being stable at the weak phase position. However, even when the electric motor 10 has the characteristic of being stable at a position near the middle of the strong phase position and the weak phase position, Since there is no residual oil in the advance side working chamber 54c on the weak side, when the engine 12 is subsequently started, the phase can be quickly changed to the strong side. This is the same in the second and third embodiments described later.

  Further, a heater 72 for raising the temperature of the hydraulic oil is provided, and when the oil temperature (temperature corresponding to the temperature of the hydraulic oil) is lower than β ° C. (predetermined value), the heater 72 is operated to raise the temperature of the hydraulic oil. Since it comprised, in addition to the above-mentioned effect, the discharge resistance of hydraulic fluid can be reduced, it can be made to supply / discharge quickly by the working chambers 54c and 54d, and the phase can be changed more rapidly.

  FIG. 8 is a flowchart similar to the flowchart of FIG. 8 showing the operation of the motor control apparatus according to the second embodiment of the present invention. 8 is also periodically executed by the MOTECU 30 when the engine 12 is stopped.

  In the following description, it is determined whether or not the ignition switch of the engine 12 has been turned off (IGOFF) by the driver in S100, in other words, whether or not the motor 10 has been stopped. It is determined whether or not the actual phase θ detected by the sensor 70n is less than α. If the result is affirmative, the subsequent processing is skipped. α is, for example, a value on the retard side of about 45 degrees. This is because the later-described processing is not necessary when the actual phase θ is on the retard side of less than 45 degrees.

  When the result in S102 is negative, the program proceeds to S104, in which it is determined again whether the oil temperature is lower than the predetermined value β ° C., and when the result is negative, the transition process is skipped. This is because in the second embodiment, the high viscosity of the hydraulic oil when the oil temperature is low is used instead.

  For a while after the engine 12 is stopped, the result in S104 is negative. However, when the temperature of the engine 12 decreases, the result is affirmative in S104 and the process proceeds to S106, and a value corresponding to 3 seconds is set in the check timer (down counter). Counting (time measurement) is started, and the process proceeds to S108 to command full RTD.

  That is, the driving of the second electric motor 70d and the hydraulic pump 70d is started, the electromagnetic solenoid 70g1 of the linear solenoid valve 70g is demagnetized, the spool of the switching valve 70e is switched to the second position, and the oil passage 70c is connected to the retard side working chamber. 54d, the advance side working chamber 54c is connected to the drain side, and hydraulic oil is supplied to the retard side working chamber 54d to bring the rotor 42 to the most retarded position (phase 0 degree, stronger phase position). To drive.

  Next, in S110, it is determined whether or not the value of the check timer has reached 0, specifically, whether or not 3 seconds have elapsed since the rotor 42 is driven to the most retarded position. At the same time, if the result is affirmative, the process proceeds to S112, the value corresponding to 3 seconds is set again in the check timer, and the process proceeds to S114 to perform an intermediate command.

  That is, the solenoid solenoid 70g1 of the linear solenoid valve 70g is PWM-controlled to apply a relatively small hydraulic pressure to the spool of the switching valve 70e, and the spool of the switching valve 70e is switched to an intermediate position between the first position and the second position. Accordingly, the four ports of the switching valve 70e are closed, and the oil passages 62 and 64 communicating with the advance side working chamber 54c and the retard side working chamber 54d are driven.

  Next, the process proceeds to S116, in which it is determined whether or not the value of the check timer has reached 0, specifically, whether or not 3 seconds have elapsed since the switching valve 70e was driven to the intermediate position. When the result is affirmative, the second electric motor 70j and the hydraulic pump 70d are stopped, and the process of FIG. 8 is terminated.

  When the result in S100 is negative, the program proceeds to S118, in which it is determined whether or not the oil temperature (the temperature corresponding to the temperature of the hydraulic oil detected by the temperature sensor 70m) is equal to or higher than a predetermined value β ° C. In step S118, the heater 72 is operated (turned on). On the other hand, when the result in S118 is affirmative, the process proceeds to step S122, in which the power supply to the heater 72 is stopped and the operation is stopped (OFF).

  In the second embodiment, as described above, when hydraulic oil (working fluid) is supplied, the outer (first) rotor 42a and the inner (second) rotor 42b are relatively rotated. The retarded-side (first) working chamber 54d that holds the strengthened phase position where the combined magnetic flux by the magnet pieces 46a and 46b is strengthened, and the advanced-angle side (second) that holds the weakly phase position where the combined magnetic flux is weakened. The working chamber 54c and the working oil are supplied to the retarding-side working chamber 54d and the advance-side working chamber 54c, or discharged from the retarding-side working chamber 54d and the advance-side working chamber 54c to the reservoir 70a. In a MOTECU (control device) 30 that includes at least a hydraulic mechanism (working fluid supply / discharge mechanism) 70 that returns, and controls the operation of the hydraulic mechanism 70 of the electric motor 10 mounted on the vehicle as a drive source together with the engine (internal combustion engine) 12. , Engine 1 Is stopped, and when the temperature corresponding to the temperature of the hydraulic oil is less than the predetermined value β ° C., the hydraulic oil is supplied so as to close the flow paths 62 and 64 after supplying the hydraulic oil to the retard side working chamber 54d. Since the mechanism 70 is operated (S100 to S116), that is, the operation fluid supply / discharge mechanism operation control means is provided, the hydraulic oil is operated after a lapse of time from the stop of the electric motor 10 (more specifically, the engine 12). Rather, the state when the temperature is lowered and becomes highly viscous can be used to maintain the phase on the stronger side or in the vicinity thereof, and the motor 10 has the characteristic of being weak and stable at the phase position. Even at the time of starting, the phase can be quickly changed to the stronger side. Therefore, even when mounted on a hybrid vehicle as a drive source together with the engine (internal combustion engine) 12, a desired starting driving force can be quickly obtained, and the driving feeling is not reduced.

  Further, a first position where the spool (valve) is disposed in the flow paths 62 and 64 supplies hydraulic oil to the advance side working chamber 54c, a second position supplying the retard side working chamber 54d, and these In addition, the MOTECU 30 drives the spool of the switching valve 70e to the second position and then drives it to the intermediate position, thereby operating the hydraulic oil on the retard side. Since the hydraulic mechanism 70 is configured to be operated so as to close the flow paths 62 and 64 after being supplied to the chamber 54d, in addition to the effects described above, the phase is surely increased or close to the side when the engine 12 is stopped. The phase can be maintained, and the phase can be changed more rapidly at the time of starting.

  Further, the heater 72 for raising the temperature of the hydraulic oil is provided, and when the temperature corresponding to the temperature of the hydraulic oil is less than a predetermined value β ° C., the heater 72 is operated to raise the temperature of the hydraulic oil. In addition to the effects described above, the hydraulic oil discharge resistance can be reduced, and the phase can be changed more quickly.

  FIG. 9 is a hydraulic circuit diagram of a hydraulic mechanism 70 similar to that of FIG. 6, showing an electric motor control apparatus according to a third embodiment of the present invention.

  The description will focus on the differences from the first embodiment. The switching valve 70e is a linear solenoid valve having an electromagnetic solenoid 70e2, and the linear solenoid valve 70g used in the first embodiment is removed. did.

  Therefore, the spool position of the switching valve 70e is controlled by the excitation / demagnetization of the electromagnetic solenoid 70e2. More specifically, the switching valve 70e has its spool switched to the first position when the electromagnetic solenoid 70e2 is energized with a large electric power, while the spool is in an intermediate position when energized with a relatively small electric power. When the switching is performed and the energization of the electromagnetic solenoid 70e2 is further stopped, the spool is switched to the second position by the force of the spring 70e1.

  The remaining configuration including the configuration in which the flow rate of the hydraulic oil is adjusted by the flow rate adjusting valve 70f is the same as that of the first embodiment shown in FIG.

  FIG. 10 is a flow chart similar to FIG. 9, showing a flow chart executed by the motor control apparatus according to the third embodiment. 9 is also periodically executed by the MOTECU 30 when the engine 12 is stopped.

  In the following, from S200 to S212, the same processing as in the second embodiment shown in FIG. 9 is performed. In S212, simultaneously with the setting of the timer value, energization to the second electric motor 70j is stopped and the hydraulic pump 70d is stopped.

  Next, in S214, a linear solenoid intermediate command is issued. In other words, the electromagnetic solenoid 70e2 is excited in the switching valve 70e with relatively small power until the result in S216 is positive, and the switching valve 70e is held at the intermediate position. The processing from S218 to S222 is not different from that in the first or second embodiment.

  Since the third embodiment is configured as described above, the same effects as described in the second embodiment can be obtained, and after the second electric motor 70j and the hydraulic pump 70d are stopped, the electromagnetic solenoid 70e2 of the switching valve 70e. Therefore, the power consumption can be reduced by eliminating the need to energize the second electric motor 70j as compared with the second embodiment. Further, better holding performance can be obtained by holding the switching valve 70e by energizing the electromagnetic solenoid 70e2 instead of the hydraulic pump 70d.

  In the first embodiment, as described above, the magnet piece 46a is arranged so that the longitudinal direction thereof is directed in the radial direction, and the first (outer peripheral side) rotor 42a and the magnet piece 46b are arranged so that the longitudinal direction thereof is directed in the circumferential direction. When the second (inner peripheral side) rotor 42b and the working fluid (for example, working oil) are supplied, the first and second rotors are relatively rotated to synthesize the magnet pieces. When the working fluid is supplied to the first (retarding side) working chamber 54d that holds the magnetic flux in a strong phase position, the first and second rotors are rotated relative to each other, and the magnet piece The second (advance side) working chamber 54c that holds the weakened phase position where the combined magnetic flux is weakened, the working fluid reservoir 70a, and the first and second working chambers are flow paths 70c and 62. 64, and the working fluid of the storage source is pumped to pass through the flow path. An electric motor 10 having at least a working fluid supply / discharge mechanism (hydraulic mechanism) 70 that is supplied to the first and second working chambers or discharged from the first and second working chambers to return to the storage source; More specifically, in the control device (MOT ECU 30) for controlling the operation of the working fluid supply / discharge mechanism 70 of the electric motor 10 mounted on the vehicle as a drive source together with the internal combustion engine (engine) 12, the electric motor 10 (more specifically, Working fluid supply / discharge mechanism operation control means (S10 to S38) for operating the working fluid supply / discharge mechanism so that the working fluid in the second working chamber is discharged when the internal combustion engine 12) is stopped. It was configured as follows.

  The working fluid supply / discharge mechanism operation control means supplies and discharges the working fluid to and from the first and second working chambers when the internal combustion engine is stopped. And the working fluid supply / discharge mechanism is operated so that the working fluid in the second working chamber is discharged (S10 to S38).

  In the second and third embodiments, as described above, the magnet piece 46a is arranged so that the longitudinal direction thereof faces the radial direction, and the first (outer peripheral side) rotor 42a and the magnet piece 46b are arranged in the longitudinal direction. When the second (inner peripheral side) rotor 42b arranged to face the direction and the working fluid (hydraulic oil) are supplied, the first and second rotors are relatively rotated so that the magnet piece When the working fluid is supplied to the first (retarding side) working chamber 54d that is held at a strong phase position where the combined magnetic flux of the first and second magnetic fluxes is strengthened, the first and second rotors are relatively rotated and the magnet A second (advanced side) working chamber 54c that holds the weakened phase position where the combined magnetic flux generated by the piece is weakened, the working fluid storage source (reservoir) 70a, and the first and second working chambers through the flow path 70c. 62, 64, and the working fluid of the storage source is pumped to pass through the flow path. An electric motor 10 having at least a working fluid supply / discharge mechanism (hydraulic mechanism) 70 that is supplied to the first and second working chambers or discharged from the first and second working chambers to return to the storage source; More specifically, in the control device (MOT ECU 30) for controlling the operation of the working fluid supply / discharge mechanism 70 of the electric motor 10 mounted on the vehicle as a drive source together with the internal combustion engine (engine) 12, the electric motor 10 (more specifically, When the internal combustion engine 12) is stopped and the temperature corresponding to the temperature of the working fluid is less than a predetermined value, the working fluid is supplied to the first working chamber and then the flow path is closed. Is provided with working fluid supply / discharge mechanism operation control means (S100 to S122, S200 to S222) for operating the working fluid supply / discharge mechanism.

  The working fluid supply / discharge mechanism is disposed in the flow paths 70c, 62, and 64, and a valve body (spool) of the working fluid is supplied to the second working chamber, a first position, and the working fluid And a switching valve 70e movable to an intermediate position between the first position and the second position, and the working fluid supply / discharge mechanism operation control means includes: After the valve body of the switching valve 70e is driven to the first position, it is driven to the intermediate position, so that the working fluid is closed after the working fluid is supplied to the first working chamber. The supply / discharge mechanism is operated (S114 to S122, S214 to S222).

  Further, as described above, the first to third embodiments include the heater 72 that raises the temperature of the working fluid, and the working fluid supply / discharge mechanism operation control means has a temperature corresponding to the temperature of the working fluid less than the predetermined value. In this case, the heater is operated to raise the temperature of the working fluid (S12 to S16, S102 to S106, S200 to S206).

  In the above description, the electric motor control device according to the present invention has been described by taking the electric motor mounted on the parallel hybrid vehicle as an example. However, the present invention is not limited to the electric motor mounted on the series hybrid vehicle, and further, the electric motor without the internal combustion engine. Applicable to motors installed in automobiles.

  Further, at least one of the first and second rotors, more specifically, the phase θ indicating the relative displacement angle of the second rotor 42b by relatively rotating the second rotor 42b about the rotation axis (rotation shaft 44). However, the phase may be changed by relatively rotating both the first and second rotors.

  Furthermore, although the heater 72 is energized from the battery 24 to raise the temperature of the hydraulic oil, a heat accumulator using waste heat of the engine 12 may be used instead of the heater 72.

  Furthermore, although the working oil has been exemplified as the working fluid, other fluids may be used.

1 is a schematic diagram showing an overall configuration of an electric motor control device according to a first embodiment of the present invention; FIG. It is principal part sectional drawing of the electric motor shown in FIG. It is a disassembled perspective view which shows the phase change mechanism of the electric motor shown in FIG. It is a schematic diagram which shows direction of the magnetic pole of the magnet of the rotor shown in FIG. It is a side view of the rotor of the electric motor shown in FIG. FIG. 6 is a hydraulic circuit diagram of a hydraulic mechanism that supplies hydraulic pressure to the working chamber of the phase change mechanism shown in FIG. 5. It is a flowchart which shows operation | movement of the control apparatus of the electric motor shown in FIG. FIG. 8 is a flow chart similar to FIG. 7 showing the operation of the motor control device according to the second embodiment of the present invention; FIG. FIG. 7 is a hydraulic circuit diagram of a hydraulic mechanism similar to FIG. 6, showing a motor control device according to a third embodiment of the present invention. FIG. 9 is a flowchart similar to FIG. 7 illustrating the operation of the motor control apparatus according to the third embodiment. FIG.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 Electric motor (electric motor), 12 Engine (internal combustion engine), 16 Transmission, 22 PDU (power drive unit), 30 Motor control unit, 40 Stator, 42 Rotor, 42a Outer peripheral side (first) rotor, 42b Inner peripheral side (second) rotor, 44 rotating shaft (rotating axis), 46a, 46b magnet piece, 50 phase change mechanism, 52 vane rotor, 52a vane, 54 annular housing, 54a partition wall, 54c advance side working chamber (Second working chamber), 54d retarded side working chamber (first working chamber), 56 drive plate, 62, 64 oil passage, 70 hydraulic mechanism, 70c oil passage, 70d hydraulic pump, 70e selector valve (4 ports) Valve), 70g linear solenoid valve, 70m temperature sensor, 72 heater

Claims (5)

  Supplying a working fluid, a first rotor in which the magnet piece is arranged so that the longitudinal direction thereof is in the radial direction, a second rotor in which the magnet piece is arranged so that the longitudinal direction thereof is in the circumferential direction, and When the working fluid is supplied, the first working chamber that holds the first and second rotors in a strong phase position where the combined magnetic flux by the magnet pieces is strengthened by relatively rotating the first and second rotors, A second working chamber for rotating the first and second rotors relative to each other to maintain a weak phase position where the combined magnetic flux by the magnet pieces is weakened; a working fluid storage source; and the first and second workings The chambers are connected by a flow path, the working fluid of the storage source is pumped and supplied to the first and second working chambers via the flow path or discharged from the first and second working chambers. The working flow of the electric motor having at least a working fluid supply / discharge mechanism for returning to the storage source In the control device for controlling the operation of the supply / discharge mechanism, the working fluid supply / discharge mechanism that operates the working fluid supply / discharge mechanism so that the working fluid in the second working chamber is discharged when the electric motor is stopped. An electric motor control device comprising an operation control means.   The working fluid supply / discharge mechanism operation control means supplies and discharges the working fluid to and from the first and second working chambers when the electric motor is stopped, between the strong phase position and the weak phase position. 2. The motor control device according to claim 1, wherein the working fluid supply / discharge mechanism is operated so as to reciprocate, and thereby the working fluid in the second working chamber is discharged.   Supplying a working fluid, a first rotor in which the magnet piece is arranged so that the longitudinal direction thereof is in the radial direction, a second rotor in which the magnet piece is arranged so that the longitudinal direction thereof is in the circumferential direction, and When the working fluid is supplied, the first working chamber that holds the first and second rotors in a strong phase position where the combined magnetic flux by the magnet pieces is strengthened by relatively rotating the first and second rotors, A second working chamber for rotating the first and second rotors relative to each other to maintain a weak phase position where the combined magnetic flux by the magnet pieces is weakened; a working fluid storage source; and the first and second workings The chambers are connected by a flow path, the working fluid of the storage source is pumped and supplied to the first and second working chambers via the flow path or discharged from the first and second working chambers. The working flow of the electric motor having at least a working fluid supply / discharge mechanism for returning to the storage source In the control device for controlling the operation of the supply / discharge mechanism, when the electric motor is stopped and the temperature corresponding to the temperature of the working fluid is less than a predetermined value, the working fluid is supplied to the first working chamber. And a working fluid supply / discharge mechanism operation control means for operating the working fluid supply / discharge mechanism so as to close the flow path.   The working fluid supply / discharge mechanism is disposed in the flow path, and the valve body supplies a first position where the working fluid is supplied to the first working chamber, and supplies the working fluid to the second working chamber. A switching valve that is movable to a second position and an intermediate position between the first position and the second position, and the working fluid supply / discharge mechanism operation control means moves the valve body of the switching valve to the first position. Then, the working fluid supply / discharge mechanism is operated so as to close the flow path after being driven to the intermediate position and thus supplying the working fluid to the first working chamber. Item 4. A motor control device according to Item 3.   A heater for raising the temperature of the working fluid, and the working fluid supply / discharge mechanism operation control means activates the heater to cause the working fluid to flow when the temperature corresponding to the temperature of the working fluid is less than the predetermined value. The motor control device according to any one of claims 1 to 4, wherein the temperature is raised.

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