JP2015086720A - System and system control device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a system and a system control device capable of reducing the number of component elements constituting a starter 10.SOLUTION: A battery 44, switching element S¥#, capacitor 42, stator coil 34¥ and solenoid coil 52 are provided to enable the first closed circuit including a battery 44, solenoid coil 52, stator coil 34¥ and ¥-phase lower arm switching element S¥n or the second closed circuit including a battery 44, solenoid coil 52, stator coil 34¥, ¥-phase upper arm switching element S¥p and capacitor 42 to be formed by operating the switching element S¥#. Then, a starter 10 is provided with a control circuit 41 for operating the switching element S¥# to flow such a current to the stator coil 34¥ as one in which a DC current flowing in the solenoid coil 52 so as to move a pinion gear 62 is overlapped with an AC current flowing in the stator coil 34¥ to rotationally drive a motor 30.

Description

  The present invention includes an AC rotating machine that is rotationally driven by an AC current, a DC voltage source having a capacitor, and a switching element, and the DC voltage source is operated by operating the switching element to rotationally drive the AC rotating machine. A system comprising: an inverter for applying a voltage to the AC rotating machine; and an actuator having a solenoid coil and driving a predetermined drive object by electromagnetic force generated by energization of the solenoid coil, and control of the system Relates to the device.

  Conventionally, as seen in Patent Document 1 below, for example, a starter motor for rotationally driving a pinion gear, a moving actuator (solenoid) for pushing the pinion gear toward the ring gear, and a battery and a starter motor are electrically connected. There is known a starter system including a first switch (relay) that switches to a state or a cutoff state, and a second switch (relay) that switches between a battery and a solenoid to a conduction state or a cutoff state. This system will be described. By energizing the solenoid by turning on the second switch, the pinion gear is pushed out toward the ring gear. Then, the starter motor is driven to rotate by energizing the starter motor by turning on the first switch. Thereby, initial rotation can be given to the crankshaft of the engine connected to the ring gear.

Japanese Patent No. 4893379

  Here, the starter system includes a second switch dedicated for controlling the current flowing to the solenoid, in addition to the first switch. The second switch is provided to control the driving force of the solenoid. By configuring the second switch with a semiconductor element or the like, for example, the current supplied to the solenoid can be freely varied to control the driving force. However, there is a concern that the number of parts constituting the starter system, such as a control circuit for controlling the semiconductor element, increases.

  The problem of an increase in the number of parts is not limited to the starter system, but has an AC rotating machine that is driven to rotate by an AC current and a solenoid coil, and a predetermined drive target is determined by an electromagnetic force generated by energizing the solenoid coil. Any system with an actuator to drive can occur as well.

  The present invention has been made to solve the above problems, and an object of the present invention is to provide a system capable of reducing the number of components constituting the system, and a control device for the system.

  In order to solve the above-mentioned problem, the invention according to claim 1 includes an AC rotating machine (30) driven to rotate by an AC current, a DC voltage source having a capacitor (42), and a switching element (S ¥ #). And an inverter (40) for applying a voltage of the DC voltage source to the AC rotating machine by operating the switching element to rotate the AC rotating machine, and a solenoid coil (52). And an actuator (50) for driving a predetermined drive object (62; 84) by electromagnetic force generated by energizing the motor, and a neutral point (N) of the stator coil (34 ¥) constituting the AC rotating machine is And one end of the solenoid coil is connected to the neutral point, and the battery and the switch are connected to the battery (44) via the solenoid coil. A first closed circuit including the battery, the solenoid coil, the stator coil, and the switching element, or the solenoid coil, by the operation of the switching element; The system is characterized in that a second closed circuit including a stator coil, the switching element, and the capacitor can be formed.

  The system includes a battery, a switching element, a capacitor, a stator coil, and a solenoid coil so that the first closed circuit or the second closed circuit can be formed. Such a configuration is employed to make the voltage of the DC voltage source higher than the voltage of the battery by operating the switching element so that the first closed circuit and the second closed circuit are alternately formed. The Here, in addition to the stator coil, a solenoid coil can be used as a reactor for a boost chopper circuit that boosts the voltage of the battery. The rotational speed of the AC rotating machine can be increased by applying the voltage of the DC voltage source to the inverter while the voltage of the DC voltage source is higher than the voltage of the battery.

  Thus, according to the said invention, a solenoid coil can be diverted as a reactor for raising the pressure | voltage rise degree of the voltage of a battery. Thereby, in order to raise the said pressure | voltage rise degree, it is not necessary to equip a system with the reactor as a passive element separately, for example. Therefore, according to the said invention, the number of components which comprise a system can be reduced.

  The invention according to claim 3 applied to the system described above is characterized in that the stator coil is used to rotate the AC rotating machine in response to a DC current that flows through the solenoid coil in order to drive the predetermined driving object. It is a control device for a system, comprising an operation unit (41) for operating the switching element so as to flow an electric current superimposed with an alternating current to flow to the stator coil.

  In the above-described invention, in order to flow a current, in which an alternating current flowing in the stator coil to rotate the alternating current rotating machine is superimposed on a direct current flowing in the solenoid coil to drive a predetermined driving object by electromagnetic force, to the stator coil, The switching element is operated by the operation unit. Here, the DC current is used to generate electromagnetic force of the solenoid coil, and does not affect the torque of the AC rotating machine. According to the above invention, both energization control of the solenoid coil and energization control of the AC rotary machine can be performed by operating the switching elements constituting the inverter. In other words, it is not necessary to provide the system with a switching element different from the switching element that constitutes the inverter for the energization control of the actuator. Therefore, the number of parts constituting the system can be reduced.

1 is an overall configuration diagram of a starter system according to a first embodiment. The block diagram of the motor control concerning the embodiment. The figure which shows the voltage vector concerning the embodiment. The figure which shows the relationship between the output torque and rotation speed of the motor concerning the embodiment. The figure which shows the pressure | voltage rise process aspect concerning the embodiment. The figure which shows the pressure | voltage rise process aspect concerning the embodiment. The time chart which shows the starter control concerning the embodiment. The whole block diagram of the pump system concerning a 2nd embodiment. The whole block diagram of the starter system concerning a 3rd embodiment.

(First embodiment)
Hereinafter, a first embodiment in which a system and a control device thereof according to the present invention are applied to a vehicle equipped with an engine as an in-vehicle main machine will be described with reference to the drawings.

  As shown in FIG. 1, the vehicle includes a starter 10 and an electronic control device (hereinafter, ECU 20) that controls the starter 10. The starter 10 includes a motor 30, an inverter 40, and an electromagnetic solenoid 50.

  The motor 30 is a three-phase AC rotating machine and includes a rotor 32 and U, V, and W phase stator coils 34U, 34V, and 34W. One end of each of the U, V, W phase stator coils 34U, 34V, 34W is connected to each other at a neutral point N. In the present embodiment, a permanent magnet synchronous machine is used as the motor 30, and in particular, an IPMSM is used.

  The inverter 40 is a three-phase inverter including three sets of serially connected bodies of a $ phase upper arm switching element S \ p (\ = U, V, W) and a $ phase lower arm switching element S \ n. Specifically, the connection point of the upper and lower arm switching elements S ¥ p, S ¥ n is opposite to the side connected to the neutral point N of both ends of the ¥ phase stator coil 34 </ b> ¥ phase terminal). The inverter 40 also includes a control circuit 41 that operates on the upper and lower arm switching elements S ¥ p and S ¥ n. In the present embodiment, the control circuit 41 corresponds to an “operation unit”. In the present embodiment, a MOSFET that is a semiconductor switching element is used as the switching element S ¥ # (# = p, n). Furthermore, a diode D ¥ # is connected in antiparallel to the switching element S ¥ #.

  A capacitor 42 is connected between a pair of input terminals (hereinafter, positive terminal Tp, negative terminal Tn) of the inverter 40. The negative terminal of the battery 44 is connected to the negative terminal Tn of the inverter 40. The battery 44 is a secondary battery serving as a power source for the in-vehicle auxiliary equipment. For example, a lead storage battery can be used as the battery 44. In the present embodiment, the capacitor 42 corresponds to a “DC voltage source”.

  One end of a solenoid coil 52 constituting the electromagnetic solenoid 50 is connected to the positive terminal of the battery 44 via a drive relay 46. The other end of the solenoid coil 52 is connected to the neutral point N. The drive relay 46 plays a role of a protective relay in an emergency such as cutting off the overcurrent when an overcurrent flows from the battery 44 to the inverter 40. The drive relay 46 is turned on or off in order to switch between the battery 44 and the solenoid coil 52 to an electrically conductive state or a disconnected state.

  In addition to the solenoid coil 52, the electromagnetic solenoid 50 includes a movable member 54 (movable iron core) and a diode 56 connected in parallel to the solenoid coil 52. Specifically, the cathode of the diode 56 is connected to one end of the drive relay 46.

  The starter 10 further includes a one-way clutch 60, a pinion gear 62, and a shift lever 66. Specifically, the pinion gear 62 is connected to the rotor 32 via the one-way clutch 60. The one-way clutch 60 transmits torque from the rotor 32 to the pinion gear 62 only when the relative rotational speed obtained by subtracting the rotational speed of the pinion gear 62 from the rotational speed of the rotating shaft of the rotor 32 is not negative. This is a member that does not transmit torque between the rotor 32 and the pinion gear 62 when negative.

  The pinion gear 62 can mesh with a ring gear 64 connected to the crankshaft 70 of the engine. Specifically, when the solenoid coil 52 is not energized, the pinion gear 62 is located at a position where it does not mesh with the ring gear 64 (hereinafter referred to as a non-connected position). On the other hand, when the solenoid coil 52 is energized, the movable member 54 is moved in a predetermined direction by the electromagnetic force of the electromagnetic solenoid 50. As a result, the pinion gear 62 is pushed out from the non-connection position toward the position (hereinafter referred to as the connection position) that engages with the ring gear 64 via the shift lever 66. In FIG. 1, the pinion gear located at the coupling position is indicated by “62a”.

  When the pinion gear 62 is engaged with the ring gear 64 and the pinion gear 62 is rotationally driven by the motor 30, initial rotation is applied to the crankshaft 70 (cranking is performed).

  The ECU 20 instructs the control circuit 41 to perform cranking. Here, when instructing cranking, the ECU 20 turns on the drive relay 46. As a result, the battery 44 and the solenoid coil 52 are electrically connected.

  In the control circuit 41, the detected value of the V-phase current sensor 48V that detects the current flowing through the V-phase stator coil 34V (hereinafter referred to as V-phase current) and the current flowing through the W-phase stator coil 34W (hereinafter referred to as W-phase current) are supplied. The detection value of the W-phase current sensor 48W to be detected and the detection value of the voltage sensor 49 that detects the input voltage of the inverter 40 are input. The control circuit 41 performs push-out control of the pinion gear 62 and rotation drive control of the pinion gear 62 by turning on and off the switching element S ¥ # to perform cranking.

  The rotational drive control of the pinion gear 62 will be described with reference to FIG. Here, FIG. 2 is a block diagram of processing relating to control of the control amount of the motor 30 executed by the control circuit 41. In the present embodiment, the control amount is the rotational speed.

  The control of the motor 30 is a control for turning on and off the switching element S ¥ # so that the command current for realizing the speed command value ω * matches the current flowing through the motor 30. That is, in this embodiment, the rotational speed of the motor 30 is the final control amount, but in order to control the rotational speed, the current flowing through the motor 30 is directly controlled as a control current. To do. In particular, in the present embodiment, current vector control is performed to control the current flowing through the motor 30 to a command current.

  Specifically, the two-phase conversion unit 41a is configured to detect the U-phase current iu, the V-phase current iv, the detection value iv of the V-phase current sensor 48V, the detection value iw of the W-phase current sensor 48W, and the electrical angle θ of the motor 30. The W-phase current iw is converted into a d-axis current idr and a q-axis current iqr that are currents in the rotating coordinate system. The U-phase current iu may be calculated based on the detection value iv of the V-phase current sensor 48V and the detection value iw of the W-phase current sensor 48W based on Kirchhoff's law. The electrical angle θ may be a detection value of a rotation angle sensor (for example, a resolver), or may be an electrical angle obtained from a well-known sensorless control using an observer or the like.

  The command current calculation unit 41b calculates a d-axis command current id * and a q-axis command current iq *, which are current command values in the rotating coordinate system, based on the speed command value ω *. Incidentally, the speed command value ω * is input from, for example, a control device (for example, ECU 20) higher than the control circuit 41.

  The command voltage calculation unit 41c is configured to control the d-axis current idr and the q-axis current iqr to the d-axis command current id * and the q-axis command current iq * as the operation amount d, the command voltage vd * on the q-axis, vq * is calculated. Specifically, the command voltage vd * on the d-axis is calculated by proportional-integral control based on the deviation Δid between the d-axis current idr and the d-axis command current id *, and the q-axis current iqr and the q-axis command current iq * are calculated. The command voltage vq * on the q-axis is calculated by proportional-integral control based on the deviation Δiq.

  The three-phase conversion unit 41d converts the command voltages vd * and vq * on the d and q axes to the three-phase command voltages V ¥ * (¥ = U, V, W in the fixed coordinate system of the motor 30 based on the electrical angle θ. ). These command voltages V ¥ * are manipulated variables for feedback control of the d and q axis currents idr and iqr to the command currents id * and iq *, and are sine wave signals.

  The correction unit 41e calculates the final command voltage D ¥ * as a value obtained by subtracting the offset amount ΔD output from the boost / current control unit 42f from the command voltage V ¥ * output from the three-phase conversion unit 41d. To do. The boost / current control unit 42f will be described in detail later.

  The generation unit 41g generates an operation signal g ¥ # for setting the three-phase output voltage of the inverter 40 to a voltage simulating the command voltage D ¥ *. In the present embodiment, a value “2 × D ¥ * / VINV” obtained by standardizing the command voltage D ¥ * by the input voltage VINV of the inverter 40 detected by the voltage sensor 49 and the carrier signal tc (for example, a triangular wave signal) The operation signal g ¥ # is generated by PWM processing based on the size comparison. Here, the operation signal g ¥ p of the upper arm switching element S ¥ p and the operation signal g ¥ n of the corresponding lower arm switching element S ¥ n are complementary to each other.

  Returning to the description of FIG. 1, the operation signals g \ p and g \ n generated by the generation unit 41g are output to the switching elements S \ p and S \ n. Thus, the upper arm switching element S ¥ p and the corresponding lower arm switching element S ¥ n are alternately turned on. The voltage vectors V0 to V7 shown in FIG. 3 are used as the output voltage vector of the inverter 40 by the on / off operation of the switching element S ¥ #. As a result, sinusoidal alternating currents that are 120 degrees out of phase with each other in electrical angle flow through the U, V, and W phase stator coils 34U, 34V, and 34W.

  Further, the control circuit 41 operates the switching element S ¥ # while the neutral point N and the battery 44 are connected, thereby controlling the current supplied to the solenoid coil 52 and driving the electromagnetic solenoid 50 as an actuator. Control the power. In addition, the control circuit 41 performs a boosting process for boosting the voltage of the capacitor 42 with respect to the voltage of the battery 44. In this process, the interphase voltage Vb of the battery 44 is boosted and applied to the capacitor 42 by using the ¥ phase stator coil 34 ¥ (¥ = U, V, W) and the solenoid coil 52 as a reactor of the boost chopper circuit. It is processing to do. Thereby, as shown by a solid line in FIG. 4, the rotational speed of the motor 30 can be increased. By operating the switching element S ¥ # in a state where the voltage of the capacitor 42 is higher than the voltage of the battery 44 by the boosting process, the motor 30 is rotationally driven to perform cranking. Thereby, for example, the time required for starting the engine can be shortened. In FIG. 4, the horizontal axis indicates the rotational speed ω of the motor 30, and the vertical axis indicates the output torque Trq of the motor 30.

  The principle of the boosting process will be described with reference to FIGS. Here, FIG. 5 is a circuit diagram in a period of a zero voltage vector V0 (hereinafter referred to as V0 vector) in which all of the lower arm switching elements SUn, SVn, SWn are turned on, and FIG. 6 is an upper arm switching element SUp. , SVp, SWp are circuit diagrams in a period of a zero voltage vector V7 (hereinafter referred to as V7 vector) in which all of them are turned on.

  As shown in FIG. 5, by turning on the lower-phase lower arm switching element S ¥ n, the battery 44, the solenoid coil 52, the lower-phase stator coil 34 ¥, and the lower-phase lower arm switching element S ¥ n are provided. 1 closed circuit is formed, and a current flows through the first closed circuit. As a result, magnetic energy is accumulated in the solenoid coil 52 and the $ -phase stator coil 34 \.

  Then, as shown in FIG. 6, the battery 44, the solenoid coil 52, and the $ phase are turned off by turning off the $ phase upper arm switching element S \ n and turning on the $ phase upper arm switching element S \ p. A second closed circuit including the stator coil 34 </ b>, the $ upper arm switching element S ¥ p, and the capacitor 42 is formed. As a result, the magnetic energy accumulated in the solenoid coil 52 and the ¥ phase stator coil 34 ¥ is output to the capacitor 42. By alternately repeating the switching operations shown in FIGS. 5 and 6, the terminal voltage Vc of the capacitor 42 can be made higher than the terminal voltage Vb of the battery 44.

  Here, the inter-terminal voltage Vc of the capacitor 42 can be controlled by adjusting an on-time ratio that is a value obtained by dividing the V0 vector period by the sum of the V0 vector period and the V7 vector period. Here, the higher the on-time ratio, the higher the terminal voltage Vc of the capacitor 42. This on-time ratio can be manipulated by offsetting the command voltage V ¥ * shown in FIG. In view of this point, the step-up / current control unit 42f shown in FIG. 2 sets the offset amount ΔD. Specifically, the correction unit 41e subtracts the offset amount ΔD from the command voltage V ¥ * output from the three-phase conversion unit 41d.

  When the offset amount ΔD is “0”, for example, in one cycle of the command voltage V ¥ *, the V0 vector period and the V7 vector period are the same. At this time, the inter-terminal voltage Vc of the capacitor 42 is about twice the inter-terminal voltage Vb of the battery 44.

  Next, FIG. 7 shows an example of the push-out control of the pinion gear 62 and the rotation drive control of the pinion gear 62. Here, in FIG. 7, the signs of the U, V, and W phase currents iu, iv, and iw are positive in the direction from the inverter 40 toward the motor 30. The sign of the current IL flowing through the solenoid coil 52 is positive in the direction from the motor 30 to the battery 44. Further, “ia, ib, ic” shown in FIG. 7 indicates a direct current flowing through the U, V, W phase stator coils 34U, 34V, 34W. In the present embodiment, since the inductances of the stator coils 34U, 34V, 34W are set to be the same, the DC currents ia, ib, ic are the same. The total value of these direct currents ia, ib, and ic becomes the direct current IL that flows through the solenoid coil 52.

  In the illustrated example, the drive relay 46 is turned on at time t0. At time t0 to t2, the switching element is set so that the timing t1 at which the pinion gear 62 is pushed out by the electromagnetic force generated by the energization current to the solenoid coil 52 is earlier than the rotational drive timing t2 of the motor 30 (rotor 32). Operate S ¥ #. This is caused to flow through the solenoid coil 52 at a timing t1 before the timing t2 at which the three-phase alternating current for rotating the motor 30 is superimposed on the direct current IL flowing through the solenoid coil 52 to push out the pinion gear 62. This can be realized by operating the switching element S ¥ # so that the direct current IL is not less than the specified current. Here, the specified current is a lower limit value of the direct current required to push the pinion gear 62 from the non-connection position to the connection position. The operation of the switching element S ¥ # described above is based on the fact that, in the present embodiment, the direct current IL is used only for generating the electromagnetic force of the solenoid coil 52 and does not affect the torque of the motor 30. is there. At time t0 to t2, processing using only zero voltage vectors V0 and V7 is performed as the output voltage vector of inverter 40.

  Thereafter, after time t2, a direct current that flows through the solenoid coil 52 to push the pinion gear 62 from the connected position to the non-connected position, and an alternating current that flows through the $ -phase stator coil 34 $ to drive the pinion gear 62 to rotate. The switching element S ¥ # is operated so as to cause the current superimposed on to flow to the ¥ phase stator coil 34 ¥. Here, processing using zero voltage vectors V0 and V7 and effective voltage vectors V1 to V6 as the output voltage vector of the inverter 40 is performed. Specifically, after time t2, any one of the effective voltage vectors V1 to V6 is set so that a current obtained by superimposing an AC current flowing in the ¥ phase stator coil 34 ¥ on a DC current flowing in the solenoid coil 52 flows in the ¥ phase stator coil 34 ¥. The switching element S ¥ # is operated so that the first closed circuit and the second closed circuit are alternately formed while sandwiching between them.

  According to the embodiment described above in detail, the solenoid coil 52 can be used as a reactor for increasing the voltage boosting degree of the battery 44. For this reason, it is not necessary to separately provide the reactor element in the starter 10 in order to raise the said pressure | voltage rise degree. Therefore, according to the present embodiment, the number of parts constituting the starter 10 can be reduced.

  Further, according to the present embodiment, both the push-out control of the pinion gear 62 and the rotation drive control of the pinion gear 62 can be performed by operating the switching element S ¥ # constituting the inverter 40. That is, it is not necessary to provide the starter 10 with a switching element different from the switching element S ¥ # for the push-out control of the pinion gear 62. Even with such a configuration, the number of parts constituting the starter 10 can be reduced.

(Second Embodiment)
Hereinafter, the second embodiment will be described with reference to the drawings with a focus on differences from the first embodiment.

  In this embodiment, it replaces with the starter 10 and aims at reduction of the number of parts about the pump apparatus 10a.

  FIG. 8 shows a pump device 10a according to the present embodiment. In FIG. 8, the same members as those shown in FIG. 1 are given the same reference numerals for the sake of convenience.

  As shown in the figure, the pump device 10 a includes a pump 80 and a valve 84 in addition to the motor 30, the inverter 40, and the electromagnetic solenoid 50. In the pump 80, the rotation shaft of the impeller 82 is connected to the rotor 32. For this reason, the impeller 82 is rotationally driven by the rotor 32 being rotationally driven. Thereby, the cooling liquid flowing through the main pipe line 86 can be sent out from the pump 80.

  The valve 84 has a function of distributing the cooling liquid sent out from the pump 80 to each of the first pipe line 88 a and the second pipe line 88 b connected to the main pipe line 86. The valve 84 is driven by the electromagnetic force of the electromagnetic solenoid 50. In the present embodiment, when the solenoid coil 52 is not energized, the valve 84 is driven so as to supply all of the cooling liquid sent from the pump 80 to the first conduit 88a. On the other hand, when the solenoid coil 52 is energized, the valve 84 is driven so as to supply all the cooling liquid delivered from the pump 80 to the second conduit 88b. Here, in this embodiment, the electromagnetic force can be continuously adjusted by continuously adjusting the direct current IL. For this reason, it is possible to continuously adjust the distribution ratio of the cooling liquid flow rate to each of the first pipe line 88a and the second pipe line 88b by driving the valve 84 by continuous adjustment of the electromagnetic force. it can. In this case, the direct current IL shown in FIG. 7 can be adjusted and changed even after the motor 30 is driven to rotate. The cooling liquid flowing through the first pipe line 88a is used for cooling the inverter 40, for example. On the other hand, the cooling liquid flowing through the second pipe line 88b is used for cooling other in-vehicle auxiliary equipment, for example.

  According to the present embodiment described above, the same effect as that obtained in the first embodiment can be obtained.

(Third embodiment)
Hereinafter, the third embodiment will be described with reference to the drawings with a focus on differences from the first embodiment.

  In the present embodiment, the circuit configuration for boosting the voltage of the capacitor 42 is changed.

  FIG. 9 shows the overall configuration of the starter system according to the present embodiment. In FIG. 9, the same members as those shown in FIG. 1 are given the same reference numerals for the sake of convenience.

  As shown in the figure, the opposite side of the both ends of the solenoid coil 52 to the side where the neutral point N is connected is connected to the negative terminal of the battery 44 via the drive relay 46. Note that a diode 56 a is connected in parallel to the solenoid coil 52. Specifically, the anode of the diode 56 a is connected to one end of the drive relay 46. Further, the position where the drive relay 46 is provided is not limited to the position shown in FIG. For example, the drive relay 46 may be provided between the positive terminal of the battery 44 and the positive terminal Tp of the inverter 40.

  On the other hand, the positive terminal of the battery 44 is connected to the positive terminal Tp of the inverter.

  Next, the boosting process according to the present embodiment will be described.

  First, by performing a first process for turning on the upper-phase upper arm switching element S ¥ p, the first process includes the battery 44, the upper-phase upper arm switching element S ¥ p, the stator coil 34 ¥, and the solenoid coil 52. A closed circuit is formed, and a current flows through the first closed circuit. As a result, magnetic energy is accumulated in the solenoid coil 52 and the $ -phase stator coil 34 \.

  Thereafter, the battery 44, the capacitor 42, and the $ lower arm are operated by performing a second process of turning the \ upper phase arm switching element S \ p off and the \ phase lower arm switching element S \ p on. A second closed circuit including the switching element S ¥ n, the stator coil 34 ¥ and the solenoid coil 52 is formed. As a result, the magnetic energy accumulated in the solenoid coil 52 and the ¥ phase stator coil 34 ¥ is output to the capacitor 42. Here, since the potentials of the positive terminals of the battery 44 and the capacitor 42 are the same, the potential of the negative terminal of the capacitor 42 is lower than the ground potential (the potential of the negative terminal of the battery 44). As a result, the terminal voltage Vc of the capacitor 42 becomes higher than the terminal voltage Vb of the battery 44.

  By alternately repeating the first process and the second process, the terminal voltage Vc of the capacitor 42 can be made higher than the terminal voltage Vb of the battery 44.

  According to the present embodiment described above, the same effect as that obtained in the first embodiment can be obtained.

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

  The system is not limited to the configuration shown in FIG. For example, the positive terminal of the battery 44 is connected to the positive terminal Tp of the inverter 40, and the negative terminal of the battery 44 is connected to the opposite side of the both ends of the solenoid coil 52 to the side where the neutral point N is connected. A capacitor is connected between the negative terminal of the battery 44 and the negative terminal Tn of the inverter 40. In such a configuration, the capacitor 42 can be eliminated, and the “DC voltage source” connected between the positive terminal Tp and the negative terminal Tn of the inverter 40 is a series connection body of the battery 44 and the capacitor. In this case, the voltage of the DC voltage source is boosted by increasing the charging voltage of the capacitor by boosting processing. At this time, by turning on the upper-phase arm switching element S ¥ p and turning off the lower-phase arm switching element S ¥ n, the battery 44, the upper-phase arm switching element S ¥ p, and the ¥ phase A first closed circuit including the stator coil 34 ¥ and the solenoid coil 52 is formed. On the other hand, by turning off the upper-phase arm switching element S ¥ p and turning on the lower-phase arm switching element S ¥ n, the solenoid coil 52, the ¥ phase stator coil 34 ¥, the capacitor, and the lower phase A second closed circuit including the arm switching element S ¥ n is formed.

  In the previous FIG. 7 of the first embodiment, for example, the direct current IL flowing through the solenoid coil 52 after time t1 may be reduced. This is because the direct current required to maintain the position of the pinion gear 62 in the coupling position after the pinion gear 62 is pushed out to the coupling position and meshed with the ring gear 64 connects the pinion gear 62 from the non-coupling position. This is because it is smaller than the direct current required to push out to the position.

  In the second embodiment, the second pipeline 88b may be deleted. In this case, the valve 84 may be an actuator that adjusts the flow rate of the cooling liquid itself as the adjustment related to the flow rate of the cooling fluid. The fluid delivered from the pump 80 is not limited to liquid, but may be gas or a mixture of liquid and gas.

  The booster circuit configuration shown in FIG. 9 of the third embodiment may be applied to the pump system shown in FIG. 8 of the second embodiment.

  In each of the above embodiments, the inverter 40 may be provided outside the starter 10 or the pump device 10a without being provided (built in) the starter 10 or the pump device 10a.

  The “AC rotating machine” is not limited to IPMSM, but may be SPMSM, for example. Further, the “AC rotating machine” is not limited to a permanent magnet field type synchronous machine including a permanent magnet in the rotor, and may be a wound field type synchronous machine including a field winding in the rotor, for example.

  DESCRIPTION OF SYMBOLS 30 ... Motor, 34 \ ... Stator coil, 40 ... Inverter, 41 ... Control circuit, 42 ... Capacitor, 44 ... Battery, 50 ... Electromagnetic solenoid, 52 ... Solenoid coil, 62 ... Pinion gear.

Claims (8)

An AC rotating machine (30) driven to rotate by an AC current;
A DC voltage source having a capacitor (42);
An inverter (40) having a switching element (S ¥ #) and applying the voltage of the DC voltage source to the AC rotating machine by operating the switching element to rotate the AC rotating machine;
An actuator (50) having a solenoid coil (52) and driving a predetermined drive object (62; 84) by electromagnetic force generated by energization of the solenoid coil;
With
The neutral point (N) of the stator coil (34 ¥) constituting the AC rotating machine is connected to the battery (44) via the solenoid coil,
One end of the solenoid coil is connected to the neutral point,
The battery, the switching element, the capacitor, the stator coil, and the solenoid coil may be a first closed circuit including the battery, the solenoid coil, the stator coil, and the switching element by operating the switching element, or the The system is provided so that the 2nd closed circuit containing a solenoid coil, the said stator coil, the said switching element, and the said capacitor | condenser can be formed. The switching element includes an upper arm switching element (S ¥ p) and a lower arm switching element (S ¥ n) connected in series to the upper arm switching element,
The capacitor is connected between a positive terminal (Tp) and a negative terminal (Tn) of the inverter,
Of the both ends of the solenoid coil, the side opposite to the side where the neutral point is connected is connected to the positive terminal of the battery,
The negative terminal of the battery is connected to the negative terminal of the inverter,
The first closed circuit is a closed circuit formed by turning off the upper arm switching element and turning on the lower arm switching element, the battery, the solenoid coil, the stator coil, and the lower arm switching. A closed circuit containing the elements,
The second closed circuit is a closed circuit formed by turning on the upper arm switching element and turning off the lower arm switching element, and includes the battery, the solenoid coil, the stator coil, and the upper arm switching. The system of claim 1, wherein the system is a closed circuit including an element and the capacitor. The switching element includes an upper arm switching element (S ¥ p) and a lower arm switching element (S ¥ n) connected in series to the upper arm switching element,
The capacitor is connected between a positive terminal (Tp) and a negative terminal (Tn) of the inverter,
Of the both ends of the solenoid coil, the side opposite to the side to which the neutral point is connected is connected to the negative terminal of the battery,
A positive terminal of the battery is connected to a positive terminal of the inverter;
The first closed circuit is a closed circuit formed by an on operation of the upper arm switching element and an off operation of the lower arm switching element, wherein the battery, the upper arm switching element, the stator coil, and the solenoid A closed circuit including a coil,
The second closed circuit is a closed circuit formed by turning off the upper arm switching element and turning on the lower arm switching element, and includes the battery, the capacitor, the lower arm switching element, and the stator coil. And a closed circuit including the solenoid coil. Applied to the system according to any one of claims 1 to 3,
The switching is performed so that a current obtained by superimposing an alternating current flowing through the stator coil to rotate the alternating-current rotating machine on a direct current flowing through the solenoid coil to drive the predetermined driving target flows through the stator coil. A control device for a system, comprising an operation unit (41) for operating an element.   The operation unit is configured to switch the switching element so that the first closed circuit and the second closed circuit are alternately formed so that a current obtained by superimposing the alternating current on the direct current flows through the stator coil. The system control device according to claim 4, wherein the control device is operated.   The operation unit operates the switching element so that a timing at which the predetermined driving target is driven by an electromagnetic force generated by energization of the solenoid coil is earlier than a rotation driving timing of the AC rotating machine. The system control apparatus according to claim 4 or 5, wherein The predetermined driving object is a pinion gear (62) movable to a connection position that meshes with a ring gear (64) coupled to a crankshaft (70) of an engine or a non-connection position that does not mesh with the ring gear,
The actuator moves the pinion gear from the non-connection position to the connection position by electromagnetic force generated by energization of the solenoid coil,
The AC rotating machine is connected to the pinion gear,
The operation unit is configured to superimpose an alternating current flowing through the stator coil to rotate the pinion gear on a direct current flowing through the solenoid coil to move the pinion gear from the coupling position to the non-coupling position. The system control device according to any one of claims 4 to 6, wherein the switching element is operated so that a current flows through the stator coil. The AC rotating machine rotates and drives a pump (80) for sending out a fluid,
The predetermined driving object is a valve (84) capable of adjusting the flow rate of the fluid delivered from the pump,
The actuator drives the valve to adjust the flow rate of the fluid by electromagnetic force generated by energizing the solenoid coil,
The operation unit is configured to switch the switching current in order to flow a current, which is obtained by superimposing an alternating current flowing in the stator coil to rotate the pump, on a direct current flowing in the solenoid coil to drive the valve. The system control device according to any one of claims 4 to 6, wherein the device is operated.

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