JP2007068363A - Ac voltage generation device and power output apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an AC voltage generation device which can generate AC voltage of multiple phases. <P>SOLUTION: A power output apparatus 100 is provided with motor generators MG1, MG2 and MGR and inverters 20, 30 and 40. The motor generators MG1, MG2 and MGR comprise three phase coils 12, 14 and 16. The inverter 20 periodically changes a potential of a neutral point N1 of the three phase coil 12. The inverter 30 periodically changes a potential of a neutral point N2 of the three phase coil 14 by a phase shifted by 2π/3 with respect to a potential change of the neutral point N1. The inverter 40 periodically changes a potential of the neutral point N3 of the three phase coil 16 at a phase shifted by 4π/3 with respect to the potential change of the neutral point N1. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an AC voltage generator and a power output device, and more particularly to an AC voltage generator and a power output device that can generate an AC voltage and supply it to a load device.

  Japanese Patent No. 2695083 (Patent Document 1) discloses an electric motor drive and power processing device used for an electric power drive vehicle. This electric motor drive and power processing device includes a secondary battery, inverters IA and IB, induction motors MA and MB, and a control unit. Induction motors MA and MB include Y-connected windings CA and CB, respectively, and input / output ports are connected to neutral points NA and NB of windings CA and CB via an EMI filter.

  Inverters IA and IB are provided corresponding to induction motors MA and MB, respectively, and are connected to windings CA and CB, respectively. Inverters IA and IB are connected in parallel to the secondary battery.

In this motor drive and power processor, inverters IA and IB generate sine wave-adjusted AC power between neutral points NA and NB, and the generated AC power is connected to an input / output port. It can be supplied to an external device (see Patent Document 1).
Japanese Patent No. 2695083 JP-A-8-126121

  However, in the above-mentioned Japanese Patent No. 2695083, only a single-phase AC voltage is generated between the neutral points NA and NB using the induction motors MA and MB and the inverters IA and IB provided corresponding to them. Cannot be generated and a multi-phase AC voltage cannot be generated.

  In addition, since the input voltages (system voltages) of the inverters IA and IB are used for the motor drive and the AC voltage generation in the induction motors MA and MB, the motor drive and the AC voltage generation are required at the same time. In addition, the voltage necessary for generating the desired driving torque and / or the shortage of the voltage necessary for generating the AC voltage may occur.

  Therefore, the present invention has been made to solve such a problem, and an object thereof is to provide an AC voltage generator capable of generating a multiphase AC voltage.

  Another object of the present invention is to provide a power output device capable of generating a polyphase AC voltage.

  Another object of the present invention is to provide a power output apparatus that can ensure a desired voltage even when the driving of an electric motor and the generation of an AC voltage are required at the same time.

  According to the present invention, the AC voltage generator includes m (m is a natural number of 3 or more) multiphase windings, m voltage converters connected to the m multiphase windings, and m Control means for controlling the voltage converters. Each of the m polyphase windings is star-connected. The control means cooperatively controls the m voltage converters so that an m-phase AC voltage is generated at a neutral point of the m multi-phase windings. Each of the m voltage converters controls the neutral point potential of the corresponding multiphase winding in response to a command from the control means.

  In the AC voltage generator according to the present invention, m (m ≧ 3) voltage converters are cooperatively controlled by the control means, and an m-phase AC voltage is generated at the neutral point of m multiphase windings. . Therefore, according to the AC voltage generator of the present invention, a multiphase AC voltage can be generated and supplied to a load outside the vehicle.

  Preferably, when the control means is required to generate a single-phase AC voltage, a single-phase AC voltage is generated between the neutral points of two multi-phase windings among the m multi-phase windings. Two voltage converters connected to the two multiphase windings are controlled in a coordinated manner. Each of the two voltage conversion devices controls the neutral point potential of the corresponding multiphase winding in response to a command from the control means.

  In this AC voltage generator, when generation of a single-phase AC voltage is required, two voltage converters among the m voltage converters are controlled in cooperation by the control means, and the two voltage converters are controlled. A single-phase AC voltage is generated between the neutral points of the two multi-phase windings corresponding to the devices. Therefore, according to this AC voltage generator, a single-phase AC voltage can be generated and supplied to a load outside the vehicle.

  More preferably, the AC voltage generator includes a first output terminal for outputting an m-phase AC voltage generated at a neutral point of m multi-phase windings to an m-phase AC load, and two multi-phase windings. A second output terminal for outputting the single-phase AC voltage generated between the neutral points of the wire to the single-phase AC load, and when the generation of the single-phase AC voltage is required, the two multi-phase windings And switching means for switching the neutral point from the first output terminal to the second output terminal.

  In this AC voltage generator, when the generation of a single-phase AC voltage is required, the neutral point of the two multiphase windings that generate the AC voltage is switched from the first output terminal to the second output terminal. It is reconnected by. Therefore, according to this AC voltage generator, the output terminal can be switched according to the required AC voltage and output to the load.

  According to the present invention, the power output device includes n (n is a natural number of 3 or more) motors each including a multiphase winding as a stator winding, and n motors included in each of the n motors. N voltage converters respectively connected to the multiphase windings and control means for controlling the n voltage converters. Each of the n polyphase windings is star-connected. The control means is configured so that an m-phase AC voltage is generated at a neutral point of m multi-phase windings respectively included in m motors (m is a natural number of 3 to n) among n motors. The m voltage converters respectively connected to the m multiphase windings are controlled in a coordinated manner. Each of the m voltage conversion devices controls the neutral point potential of the corresponding multiphase winding in response to a command from the control means.

  In the power output apparatus according to the present invention, m (m ≧ 3) voltage converters are controlled in cooperation by the control means, and m multi-phase windings respectively connected to the m voltage converters are controlled. An m-phase AC voltage is generated at the neutral point. Therefore, according to the power output apparatus of the present invention, a multiphase AC voltage can be generated and supplied to a load outside the vehicle.

  Preferably, n> m, and any one of the n motors other than the m motors is connected to the internal combustion engine of the vehicle and generates power using the power of the internal combustion engine. The m voltage converters that are cooperatively controlled use the generated power to generate an m-phase AC voltage at the neutral point of the m multi-phase windings.

  In this power output device, since m-phase AC voltage is generated using m motors other than the motor that generates power using the power of the internal combustion engine, in the motor that generates power using the power of the internal combustion engine, the voltage is All of the input voltage (system voltage) of the converter is used for driving the motor, and in the m motors used for generating the m-phase AC voltage, all of the system voltage is used for generating the m-phase AC voltage. . Therefore, according to the power output apparatus, a desired m-phase AC voltage can be generated while generating a large amount of power (high voltage).

  Preferably, when the control means is requested to generate a single-phase AC voltage, a single-phase AC voltage is applied between the neutral points of two multiphase windings respectively included in two of the m motors. The two voltage converters respectively connected to the two multiphase windings are controlled in a coordinated manner so that. Each of the two voltage conversion devices controls the neutral point potential of the corresponding multiphase winding in response to a command from the control means.

  In this power output device, when generation of a single-phase AC voltage is required, two voltage conversion devices among the m voltage conversion devices are controlled in cooperation by the control means, and the two voltage conversion devices A single-phase AC voltage is generated between the neutral points of the two multiphase windings respectively included in the two electric motors respectively corresponding to. Therefore, according to this power output device, a single-phase AC voltage can be generated and supplied to a load outside the vehicle.

  More preferably, the power output device includes a first output terminal for outputting an m-phase AC voltage generated at a neutral point of m multi-phase windings to an m-phase AC load, and two multi-phase windings. A second output terminal for outputting the single-phase AC voltage generated between the neutral points to the single-phase AC load, and the two multi-phase windings when the generation of the single-phase AC voltage is required. And switching means for switching the sex point from the first output terminal to the second output terminal.

  In this power output device, when the generation of a single-phase AC voltage is required, the neutral point of the two multiphase windings where the AC voltage is generated is switched from the first output terminal to the second output terminal by the switching means. It can be reconnected. Therefore, according to this power output device, it is possible to switch the output terminal according to the requested AC voltage and output it to the load.

  According to the invention, the power output device includes first to third motors including first to third multiphase windings as stator windings, and first to third multiphase windings. Are provided with first to third voltage converters connected to each of the first and third voltage converters, and control means for controlling the first to third voltage converters. Each of the first to third multiphase windings is star-connected. The first electric motor is connected to the internal combustion engine of the vehicle and generates electric power using the power of the internal combustion engine. The control means cooperatively controls the second and third voltage conversion devices so that a single-phase AC voltage is generated between the neutral points of the second and third multiphase windings. The second and third voltage converters use the electric power generated by the first electric motor, and use a single phase between the neutral points of the second and third multiphase windings according to a command from the control means. Generate alternating voltage.

  In the power output apparatus according to the present invention, power is generated by the first motor using the power of the internal combustion engine, and a single-phase AC voltage is generated using the second and third motors. In the second and third motors, all of the input voltage (system voltage) of the voltage converter is used for driving the first motor, and all of the system voltage is used for generating the single-phase AC voltage. . Therefore, according to the power output apparatus of the present invention, a desired single-phase AC voltage can be generated while generating a large amount of power (high voltage).

  According to the present invention, it is possible to generate a multi-phase AC voltage using m (m ≧ 3) multi-phase windings and supply the generated multi-phase AC voltage to a load outside the vehicle.

  In addition, by sharing the functions of an electric motor that generates power using the power of the internal combustion engine and an electric motor that is used to generate an alternating voltage, a desired alternating current can be generated while generating a large amount of power (high voltage) using the power of the internal combustion engine. A voltage can be generated and supplied to a load outside the vehicle.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the drawings, the same or corresponding parts are denoted by the same reference numerals and description thereof will not be repeated.

[Embodiment 1]
1 is an overall block diagram of a power output apparatus according to Embodiment 1 of the present invention. Referring to FIG. 1, motive power output device 100 includes power storage device B, boost converter 10, inverters 20, 30, 40, motor generators MG1, MG2, MGR, engine 4, AC lines ACL1-ACL3, , AC port 50, output terminal 55, control device 60, power supply lines PL1, PL2, ground line SL, capacitors C1, C2, U-phase lines UL1-UL3, V-phase lines VL1-VL3, W-phase lines WL1 to WL3 and voltage sensors 71 and 72 are provided.

  Power output device 100 is mounted on a vehicle, for example, a hybrid vehicle that uses engine 4 and motor generators MG2 and MGR as power sources. Motor generator MG1 is connected to engine 4, operates as a motor for starting engine 4, and is incorporated in a hybrid vehicle as operating as a generator driven by engine 4. Motor generators MG2 and MGR are connected to front wheel 2 and rear wheel 3, respectively, and are incorporated in a hybrid vehicle as motors for driving front wheel 2 and rear wheel 3, respectively.

  The positive electrode of power storage device B is connected to power supply line PL1, and the negative electrode of power storage device B is connected to ground line SL. Capacitor C1 is connected between power supply line PL1 and ground line SL.

  Boost converter 10 includes a reactor L, npn transistors Q1 and Q2, and diodes D1 and D2. Npn transistors Q1 and Q2 are connected in series between power supply line PL2 and ground line SL. Diodes D1 and D2 are connected between the collectors and emitters of the npn transistors Q1 and Q2, respectively, so that current flows from the emitter side to the collector side. Reactor L has one end connected to a connection point of npn transistors Q1 and Q2, and the other end connected to power supply line PL1.

  For example, an IGBT (Insulated Gate Bipolar Transistor) can be used as the above-described npn-type transistor and the following npn-type transistor in this specification, and a power MOSFET (metal oxide semiconductor field) can be used instead of the npn-type transistor. -effect transistor) or the like can be used.

  Capacitor C2 is connected between power supply line PL2 and ground line SL. Inverter 20 includes a U-phase arm 22, a V-phase arm 24 and a W-phase arm 26. U-phase arm 22, V-phase arm 24, and W-phase arm 26 are connected in parallel between power supply line PL2 and ground line SL. The U-phase arm 22 is composed of npn transistors Q11 and Q12 connected in series, the V-phase arm 24 is composed of npn transistors Q13 and Q14 connected in series, and the W-phase arm 26 is connected in series. Npn transistors Q15 and Q16. Between the collector and emitter of each of the npn transistors Q11 to Q16, diodes D11 to D16 for passing a current from the emitter side to the collector side are respectively connected.

  Inverter 30 includes a U-phase arm 32, a V-phase arm 34 and a W-phase arm 36. Inverter 40 includes a U-phase arm 42, a V-phase arm 44, and a W-phase arm 46. The configuration of the inverters 30 and 40 is the same as that of the inverter 20.

  Motor generator MG1 includes a three-phase coil 12 as a stator coil. One end of the U-phase coil U1, the V-phase coil V1, and the W-phase coil W1 forming the three-phase coil 12 is connected to each other to form a neutral point N1, and the other end of each phase coil is the U-phase of the inverter 20. Connected to the connection points of the npn transistors in arm 22, V-phase arm 24, and W-phase arm 26, respectively.

  Motor generators MG2 and MGR include three-phase coils 14 and 16 as stator coils, respectively. The configurations of motor generators MG2 and MGR are the same as motor generator MG1.

  One end of AC line ACL 1 is connected to neutral point N 1 of three-phase coil 12, and the other end is connected to AC port 50. One end of AC line ACL 2 is connected to neutral point N 2 of three-phase coil 14, and the other end is connected to AC port 50. One end of AC line ACL 3 is connected to neutral point N 3 of three-phase coil 16, and the other end is connected to AC port 50. AC port 50 is arranged between AC lines ACL <b> 1 to ACL <b> 3 and output terminal 55.

  The power storage device B is a chargeable / dischargeable DC power source, and is composed of, for example, a secondary battery such as nickel metal hydride or lithium ion. Power storage device B outputs DC power to boost converter 10. In addition, power storage device B is charged with a DC voltage output from boost converter 10. Note that a large-capacity capacitor may be used as the power storage device B.

  Voltage sensor 71 detects voltage VB of power storage device B and outputs the detected voltage VB to control device 60. Capacitor C1 smoothes voltage fluctuation between power supply line PL1 and ground line SL.

  Boost converter 10 boosts the DC voltage received from power storage device B using reactor L based on signal PWC from control device 60, and supplies the boosted boosted voltage to power supply line PL2. Specifically, boost converter 10 stores a current flowing according to the switching operation of npn transistor Q2 as magnetic field energy in reactor L based on a signal PWC from control device 60, thereby causing a direct current from power storage device B. Boost the voltage. Boost converter 10 outputs the boosted boosted voltage to power supply line PL2 via diode D1 in synchronization with the timing when npn transistor Q2 is turned off. Boost converter 10 steps down DC voltage supplied from power supply line PL <b> 2 based on signal PWC from control device 60 and charges power storage device B.

  Capacitor C2 smoothes voltage fluctuation between power supply line PL2 and ground line SL. Voltage sensor 72 detects a voltage between terminals of capacitor C2, that is, a voltage of power supply line PL2 with respect to ground line SL (hereinafter, this voltage is also referred to as “system voltage”), and controller 60 detects the detected system voltage VH. Output to.

  Inverter 20 converts a DC voltage received from power supply line PL2 into a three-phase AC voltage based on signal PWM1 from control device 60, and outputs the converted three-phase AC voltage to motor generator MG1. Thereby, motor generator MG1 is driven to generate torque specified by torque command value TR1. Inverter 20 receives the output from engine 4 and converts the three-phase AC voltage generated by motor generator MG1 into a DC voltage based on signal PWM1 from control device 60, and converts the converted DC voltage to power supply line PL2. Output to.

  Inverter 30 converts a DC voltage received from power supply line PL2 into a three-phase AC voltage based on signal PWM2 from control device 60, and outputs the converted three-phase AC voltage to motor generator MG2. Thereby, motor generator MG2 is driven so as to generate torque specified by torque command value TR2. Inverter 30 also converts the three-phase AC voltage generated by motor generator MG2 by receiving the rotational force from front wheel 2 during regenerative braking of the vehicle into a DC voltage based on signal PWM2 from control device 60, and the conversion. The DC voltage thus output is output to the power supply line PL2.

  Inverter 40 converts a DC voltage received from power supply line PL2 into a three-phase AC voltage based on signal PWM3 from control device 60, and outputs the converted three-phase AC voltage to motor generator MGR. Thereby, motor generator MGR is driven to generate torque specified by torque command value TR3. Further, the inverter 40 converts the three-phase AC voltage generated by the motor generator MGR by receiving the rotational force from the rear wheel 3 during regenerative braking of the vehicle into a DC voltage based on the signal PWM3 from the control device 60. The converted DC voltage is output to power supply line PL2.

  Note that regenerative braking here refers to braking with regenerative power generation when the driver operating the vehicle performs a foot brake operation, or turning off the accelerator pedal while driving without operating the foot brake. This includes decelerating (or stopping acceleration) the vehicle while generating regenerative power.

  Here, when output of a three-phase AC voltage to a load (not shown, the same applies hereinafter) connected to the output terminal 55 is required, the inverters 20, 30, and 40 are out of phase with each other by 2π / 3. AC voltages are generated at neutral points N1, N2, and N3, respectively. That is, the inverter 20 controls the potential of the neutral point N1 based on the control signal PWM1 from the control device 60 so that an AC voltage is generated at the neutral point N1, and the inverter 30 is generated at the neutral point N1. The inverter 40 controls the potential at the neutral point N2 based on the control signal PWM2 from the control device 60 so that an AC voltage having a phase shift of 2π / 3 with respect to the AC voltage to be generated is generated at the neutral point N2. Based on the control signal PWM3 from the control device 60, the potential of the neutral point N3 is generated so that an AC voltage having a phase shift of 4π / 3 with respect to the AC voltage generated at the neutral point N1 is generated at the neutral point N3. To control.

  Each of motor generators MG1, MG2, and MGR is a three-phase AC motor, and includes, for example, a three-phase AC synchronous motor. Motor generator MG 1 is connected to engine 4, generates a three-phase AC voltage using the output of engine 4, and outputs the generated three-phase AC voltage to inverter 20. Motor generator MG <b> 1 generates driving force by the three-phase AC voltage received from inverter 20 and starts engine 4. Motor generator MG2 is connected to front wheel 2 of the vehicle, and generates a driving torque of the vehicle by a three-phase AC voltage received from inverter 30. Motor generator MG2 generates a three-phase AC voltage and outputs it to inverter 30 during regenerative braking of the vehicle. Motor generator MGR is connected to rear wheel 3 of the vehicle, and generates a driving torque of the vehicle by a three-phase AC voltage received from inverter 40. Motor generator MGR generates a three-phase AC voltage and outputs it to inverter 40 during regenerative braking of the vehicle.

  AC port 50 includes a relay for connecting / disconnecting AC lines ACL1 to ACL3 and output terminal 55, a voltage sensor for detecting voltages Vac1 to Vac3 and currents Iac1 to Iac3 generated on AC lines ACL1 to ACL3, and Current sensor (none of which are shown). The AC port 50 turns on the relay when receiving the H (logic high) level output permission signal EN from the control device 60, and electrically connects the output terminal 55 to the AC lines ACL1 to ACL3. AC port 50 detects voltages Vac1 to Vac3 and currents Iac1 to Iac3 in AC lines ACL1 to ACL3 and outputs the detected values to control device 60. The output terminal 55 is an outlet for outputting the three-phase AC voltage generated at the neutral points N1 to N3 to a load outside the vehicle.

  Control device 60 generates signal PWC for driving boost converter 10 and signals PWM1 to PWM3 for driving inverters 20, 30, and 40, and generates generated signals PWC, PWM1 to PWM3, respectively, for boost converter 10 and Output to inverters 20, 30, and 40.

  Here, when control device 60 receives an H-level signal AC requesting output of a three-phase AC voltage to a load connected to output terminal 55 from an ECU (Electronic Control Unit: not shown, the same applies hereinafter). , H level output enable signal EN is output to AC port 50. Controller 60 controls inverters 20, 30, and 40 in a coordinated manner so that a three-phase AC voltage is generated at neutral points N1 to N3. Details of the control will be described later.

  FIG. 2 is a functional block diagram of the control device 60 shown in FIG. Referring to FIG. 2, control device 60 includes a converter control unit 61, first to third inverter control units 62 to 64, and an AC output control unit 65. Based on voltage VB from voltage sensor 71, system voltage VH from voltage sensor 72, torque command values TR1 to TR3 from ECU, and motor rotational speeds ω1 to ω3, converter control unit 61 is an npn transistor of boost converter 10. A signal PWC for turning on / off Q1 and Q2 is generated, and the generated signal PWC is output to boost converter 10.

  First inverter control unit 62 turns on / off npn transistors Q11-Q16 of inverter 20 based on torque command value TR1, motor current MCRT1, motor rotation speed ω1, and system voltage VH of motor generator MG1. The signal PWM1 is generated, and the generated signal PWM1 is output to the inverter 20.

  Second inverter control unit 63 turns on / off npn transistors Q21 to Q26 of inverter 30 based on torque command value TR2 of motor generator MG2, motor current MCRT2 and motor rotational speed ω2, and system voltage VH. The signal PWM2 is generated, and the generated signal PWM2 is output to the inverter 30.

  Third inverter control unit 64 turns on / off npn transistors Q31 to Q36 of inverter 40 based on torque command value TR3 of motor generator MGR, motor current MCRT3 and motor rotational speed ω3, and system voltage VH. The signal PWM3 is generated, and the generated signal PWM3 is output to the inverter 40.

  The motor rotation speeds ω1 to ω3 and the motor currents MCRT1 to MCRT3 are detected by a rotation sensor and a current sensor not shown, respectively.

  AC output control unit 65 determines whether or not to generate a three-phase AC voltage at neutral points N1 to N3 based on signal AC from ECU. Here, the signal AC is a signal whose logic level changes in accordance with, for example, an operation of an AC output switch (not shown), and the H level signal AC is a three-phase alternating current to a load connected to the output terminal 55. It is a signal requesting output of voltage.

  When AC output control unit 65 receives H-level signal AC, AC output control unit 65 generates an AC voltage for generating three-phase AC voltages at neutral points N1 to N3 based on voltages Vac1 to Vac3 detected at AC port 50. A voltage command is generated, and the generated AC voltage command is output to the first to third inverter control units 62 to 64. When AC output control unit 65 receives H level signal AC, AC output control unit 65 outputs H level output enable signal EN to AC port 50.

  FIG. 3 is a functional block diagram of converter control unit 61 shown in FIG. Referring to FIG. 3, converter control unit 61 includes an inverter input voltage command calculation unit 112, a feedback voltage command calculation unit 114, a duty ratio calculation unit 116, and a PWM signal conversion unit 118.

  The inverter input voltage command calculation unit 112 calculates the optimum value (target value) of the inverter input voltage, that is, the voltage command VH_com based on the torque command values TR1 to TR3 and the motor rotation speeds ω1 to ω3, and the calculated voltage command VH_com is calculated. Output to feedback voltage command calculation unit 114.

  Feedback voltage command calculation unit 114 generates system voltage VH, which is the output voltage of boost converter 10, based on system voltage VH detected by voltage sensor 72 and voltage command VH_com from inverter input voltage command calculation unit 112. A feedback voltage command VH_com_fb for controlling to the command VH_com is calculated, and the calculated feedback voltage command VH_com_fb is output to the duty ratio calculation unit 116.

  Duty ratio calculation unit 116 calculates a duty ratio for controlling system voltage VH to voltage command VH_com based on voltage VB from voltage sensor 71 and feedback voltage command VH_com_fb from feedback voltage command calculation unit 114. The calculated duty ratio is output to the PWM signal converter 118.

  PWM signal conversion unit 118 generates a PWM (Pulse Width Modulation) signal for turning on / off npn transistors Q1 and Q2 of boost converter 10 based on the duty ratio received from duty ratio calculation unit 116. The generated PWM signal is output as signal PWC to npn transistors Q1 and Q2 of boost converter 10.

  Note that increasing the on-duty of npn transistor Q2 in the lower arm of boost converter 10 increases the power storage in reactor L, so that a higher voltage output can be obtained. On the other hand, increasing the on-duty of the npn transistor Q1 in the upper arm decreases the voltage of the power supply line PL2. Therefore, the voltage of power supply line PL2 can be controlled to an arbitrary voltage equal to or higher than the output voltage of power storage device B by controlling the duty ratio of npn transistors Q1 and Q2.

  FIG. 4 is a detailed functional block diagram of first inverter control unit 62 and AC output control unit 65 shown in FIG. For the AC output control unit 65, only the portion related to the first inverter control unit 62 is shown. Referring to FIG. 4, first inverter control unit 62 includes current conversion unit 122, MG1 current command calculation unit 124, PI control units 126 and 128, conversion unit 130, and PWM signal generation unit 132. Become.

  Current conversion unit 122 uses motor rotation speed ω1 of motor generator MG1 to generate motor current MCRT1 (consisting of U-phase current Iu1, V-phase current Iv1, and W-phase current Iw1) detected at AC port 50 as the d-axis. The current Id1 and the q-axis current Iq1 are converted. Based on torque command value TR1 of motor generator MG1, MG1 current command calculation unit 124 calculates current commands Id1r and Iq1r of motor generator MG1 on the d and q axes.

  The PI control unit 126 receives a deviation between the d-axis current Id1 from the current conversion unit 122 and the current command Id1r from the MG1 current command calculation unit 124, performs a proportional integral calculation with the deviation as an input, and converts the calculation result Output to the unit 130. The PI control unit 128 receives a deviation between the q-axis current Iq1 from the current conversion unit 122 and the current command Iq1r from the MG1 current command calculation unit 124, performs a proportional integral calculation with the deviation as an input, and converts the calculation result Output to the unit 130.

  Conversion unit 130 converts the voltage commands on the d and q axes received from PI control units 126 and 128, respectively, into U, V, and W phase voltage commands using motor rotation speed ω1.

  The PWM signal generation unit 132 corresponds to the inverter 20 based on the voltage command obtained by superimposing the AC voltage command from the AC output control unit 65 on the U, V, and W phase voltage commands from the conversion unit 130 and the system voltage VH. PWM signals Pu1, Pv1, Pw1 to be generated are generated, and the generated PWM signals Pu1, Pv1, Pw1 are output to the inverter 20 as a signal PWM1.

  The AC output control unit 65 includes a multiplication unit 134, a PI control unit 136, and a subtraction unit 138. Multiplier 134 generates a target value of the AC voltage generated at neutral point N1 by multiplying constant 100√2 by sin ωt, and outputs the generated target value to subtractor 138. Here, the constant 100√2 is a peak value of the AC voltage generated at the neutral point N1, and the value can be changed according to the generated AC voltage. Further, ω is the frequency of the generated AC voltage.

  The PI control unit 136 receives a deviation between the voltage target value from the multiplication unit 134 and the voltage Vac1 (that is, the potential at the neutral point N1) of the AC line ACL1 detected at the AC port 50, and uses the deviation as a proportional integral. The calculation is performed, and the calculation result is output to the subtraction unit 138. Then, the subtracting unit 138 subtracts the output value of the PI control unit 136 from the output value of the multiplying unit 134, and outputs the calculation result to the first inverter control unit 62 as an AC voltage command for the first inverter control unit 62. To do.

  In the first inverter control unit 62, the AC voltage command from the AC output control unit 65 is uniformly superimposed on the U, V, and W phase voltage commands from the conversion unit 130. Thereby, the sum total of the switching duty of the upper arm and the lower arm of the inverter 20 is periodically changed according to the AC voltage command from the AC output control unit 65, and as a result, the neutral point is changed according to the AC voltage command. The potential of N1 changes periodically.

  FIG. 5 is a detailed functional block diagram of second inverter control unit 63 and AC output control unit 65 shown in FIG. For the AC output control unit 65, only the portion related to the second inverter control unit 63 is shown. Referring to FIG. 5, second inverter control unit 63 includes current conversion unit 142, MG2 current command calculation unit 144, PI control units 146 and 148, conversion unit 150, and PWM signal generation unit 152. Become. The configuration of the second inverter control unit 63 is the same as the configuration of the first inverter control unit 62 shown in FIG.

  AC output control unit 65 further includes a multiplication unit 154, a PI control unit 156, and a subtraction unit 158. Multiplier 154 multiplies constant 100√2 by sin (ωt + 2π / 3) to generate a target value for the AC voltage generated at neutral point N2, and outputs the generated target value to subtractor 158. That is, the target value of the AC voltage is shifted in phase by 2π / 3 with respect to the target value of the AC voltage output to the first inverter control unit 62.

  The PI control unit 156 receives a deviation between the voltage target value from the multiplication unit 154 and the voltage Vac2 of the AC line ACL2 detected at the AC port 50 (that is, the potential at the neutral point N2), and takes the deviation as an input for proportional integration. The calculation is performed, and the calculation result is output to the subtraction unit 158. Then, the subtracting unit 158 subtracts the output value of the PI control unit 156 from the output value of the multiplying unit 154, and outputs the calculation result to the second inverter control unit 63 as an AC voltage command for the second inverter control unit 63. To do.

  Also in the second inverter control unit 63, the AC voltage command from the AC output control unit 65 is uniformly superimposed on the U, V, and W phase voltage commands from the conversion unit 150. Thereby, the sum total of the switching duty of the upper arm and the lower arm of the inverter 30 periodically changes according to the AC voltage command from the AC output control unit 65, and as a result, the neutral point according to the AC voltage command. The potential of N2 changes periodically. The potential change at the neutral point N2 is out of phase by 2π / 3 with respect to the potential change at the neutral point N1.

  FIG. 6 is a detailed functional block diagram of third inverter control unit 64 and AC output control unit 65 shown in FIG. For the AC output control unit 65, only the portion related to the third inverter control unit 64 is shown. Referring to FIG. 6, third inverter control unit 64 includes current conversion unit 162, MGR current command calculation unit 164, PI control units 166 and 168, conversion unit 170, and PWM signal generation unit 172. Become. The configuration of the third inverter control unit 64 is the same as the configuration of the first inverter control unit 62 shown in FIG.

  AC output control unit 65 further includes a multiplication unit 174, a PI control unit 176, and a subtraction unit 178. Multiplier 174 multiplies constant 100√2 by sin (ωt + 4π / 3) to generate a target value of the alternating voltage generated at neutral point N3, and outputs the generated target value to subtractor 178. That is, the target value of the AC voltage is shifted in phase by 4π / 3 with respect to the target value of the AC voltage output to the first inverter control unit 62.

  The PI control unit 176 receives a deviation between the voltage target value from the multiplication unit 174 and the voltage Vac3 (that is, the potential at the neutral point N3) of the AC line ACL3 detected at the AC port 50, and the deviation is input as a proportional integral. The calculation is performed, and the calculation result is output to the subtraction unit 178. The subtracting unit 178 subtracts the output value of the PI control unit 176 from the output value of the multiplying unit 174, and outputs the calculation result to the third inverter control unit 64 as an AC voltage command for the third inverter control unit 64. To do.

  Also in the third inverter control unit 64, the AC voltage command from the AC output control unit 65 is uniformly superimposed on the U, V, W phase voltage commands from the conversion unit 170. Thereby, the sum total of the switching duty of the upper arm and the lower arm of the inverter 40 is periodically changed according to the AC voltage command from the AC output control unit 65. As a result, the neutral point is changed according to the AC voltage command. The potential of N3 changes periodically. The phase of the potential change at the neutral point N3 is shifted by 4π / 3 with respect to the potential change at the neutral point N1.

  Although not specifically shown, AC output control unit 65 outputs the generated AC voltage command to first to third inverter control units 62 to 64 when receiving H level signal AC, and L When the signal AC of the (logic low) level is received, the AC voltage command output to the first to third inverter control units 62 to 64 is set to zero.

  FIG. 7 is a waveform diagram of the sum of the switching duty of each inverter 20, 30, 40 and the three-phase AC voltage Vac generated at neutral points N1 to N3. Referring to FIG. 7, curves k1 to k3 indicate changes in the sum of the switching duties in inverters 20, 30, and 40, respectively. Here, the sum of the switching duties is obtained by subtracting the on-duty of the lower arm from the on-duty of the upper arm in each inverter. In FIG. 7, when the sum of the switching duty is positive, it indicates that the neutral point potential of the corresponding motor generator is higher than the intermediate potential VH / 2 of the system voltage VH, and when the sum of the switching duty is negative , Indicating that the neutral point potential is lower than the intermediate potential VH / 2.

  In power output device 100, as shown in FIG. 4, AC voltage commands output from AC output control unit 65 to first inverter control unit 62 are used as U, V, and W phase voltage commands for motor generator MG1. Are uniformly superimposed on each other to periodically change the total switching duty of the inverter 20 at the frequency ω according to the curve k1. Further, as shown in FIG. 5, the AC voltage command output from AC output control unit 65 to second inverter control unit 63 is uniformly superimposed on the U, V, W phase voltage commands of motor generator MG2. Thus, the sum of the switching duty of the inverter 30 is periodically changed at the frequency ω according to the curve k2. Further, as shown in FIG. 6, the AC voltage command output from AC output control unit 65 to third inverter control unit 64 is uniformly superimposed on the U, V, W phase voltage commands of motor generator MGR. Thus, the sum of the switching duty of the inverter 40 is periodically changed at the frequency ω according to the curve k3.

  That is, the curve k2 has a phase shift of 2π / 3 with respect to the curve k1, and the curve k3 has a phase shift of 4π / 3 with respect to the curve k1 (2π / 3 with respect to the curve k2). Then, the potential of the neutral point N1 changes periodically as shown by the curve U in accordance with the change of the curve k1, and the potential of the neutral point N2 is shown in the curve V according to the change of the curve k2. Thus, the potential of the neutral point N3 periodically changes as indicated by the curve W in accordance with the change of the curve k3.

  In this manner, the three-phase AC voltage Vac indicated by the curves U, V, and W can be generated at the neutral points N1 to N3. The three-phase AC voltage Vac generated at the neutral points N1 to N3 can be supplied to the load connected to the output terminal 55 via the AC lines ACL1 to ACL3.

  As described above, according to the first embodiment, inverters 20, 30, and 40 are controlled in a coordinated manner, and a three-phase AC voltage is generated at neutral points N1 to N3. Therefore, a three-phase AC voltage can be supplied to the load connected to the output terminal 55.

  Further, according to the first embodiment, it is not necessary to separately provide a dedicated inverter for generating a three-phase AC voltage. Therefore, the vehicle can be reduced in size and weight while having a function of supplying a three-phase AC voltage.

[Embodiment 2]
FIG. 8 is an overall block diagram of a power output apparatus according to Embodiment 2 of the present invention. Referring to FIG. 8, power output device 100A does not include AC line ACL1 in the configuration of power output device 100 according to the first embodiment shown in FIG. Instead, an AC port 50A, an output terminal 56, and a control device 60A are provided. The other configuration of the power output apparatus 100A is the same as that of the power output apparatus 100.

  AC port 50 </ b> A is arranged between AC lines ACL <b> 2 and ACL <b> 3 and output terminal 56. AC port 50A detects a relay for connecting / disconnecting AC lines ACL2, ACL3 and output terminal 56, a voltage Vac generated between AC lines ACL2, ACL3, and a current Iac flowing through AC lines ACL2, ACL3, respectively. Voltage sensor and current sensor (both not shown). When AC port 50A receives H level output permission signal EN from control device 60A, AC port 50A turns on the relay, and electrically connects output terminal 56 to AC lines ACL2 and ACL3. AC port 50A detects voltage Vac and current Iac, and outputs the detected values to control device 60A. The output terminal 56 is an outlet for outputting a single-phase AC voltage generated between the neutral points N2 and N3 to a load outside the vehicle.

  When control device 60A receives H-level signal AC from the ECU, control device 60A outputs H-level output permission signal EN to AC port 50A. Then, control device 60A controls inverters 30 and 40 in a coordinated manner so that a single-phase AC voltage is generated between neutral points N2 and N3.

  FIG. 9 is a functional block diagram of control device 60A shown in FIG. Referring to FIG. 9, control device 60 </ b> A includes a first inverter unit in place of first inverter unit 62 and AC output control unit 65 in the configuration of control device 60 in the first embodiment shown in FIG. 2. 62A and an AC output controller 65A.

  First inverter control unit 62A turns on / off npn transistors Q11-Q16 of inverter 20 based on torque command value TR1, motor current MCRT1, motor rotational speed ω1, and system voltage VH of motor generator MG1. The signal PWM1 is generated, and the generated signal PWM1 is output to the inverter 20.

  AC output control unit 65A determines whether or not to generate a single-phase AC voltage between neutral points N2 and N3 based on signal AC from ECU. When AC output control unit 65A receives H-level signal AC, AC voltage control unit 65A generates an AC voltage for generating a single-phase AC voltage between neutral points N2 and N3 based on voltage Vac detected at AC port 50A. A command is generated, and the generated AC voltage command is output to second and third inverter control units 63 and 64. When AC output control unit 65A receives H level signal AC, AC output control unit 65A outputs H level output enable signal EN to AC port 50A.

  FIG. 10 is a detailed functional block diagram of the first inverter control unit 62A shown in FIG. Referring to FIG. 10, first inverter control unit 62 </ b> A does not superimpose an AC voltage command from AC output control unit 65 in the configuration of first inverter control unit 62 in the first embodiment shown in FIG. 4. It has a configuration. That is, the first inverter control unit 62A is irrelevant to the generation of the single-phase AC voltage.

  FIG. 11 is a detailed functional block diagram of AC output control unit 65A shown in FIG. FIG. 11 also shows the second and third inverter control units 63 and 64 that are the output destinations of the AC voltage command from the AC output control unit 65A.

  Referring to FIG. 11, AC output control unit 65 </ b> A includes an FB calculation unit 182, a multiplication unit 184, and a subtraction unit 186. The FB calculation unit 182 performs a feedback calculation based on the deviation between the AC voltage reference value Vref and the voltage Vac detected at the AC port 50A, and outputs the calculation result. Here, the AC voltage reference value Vref is a target value of the single-phase AC voltage generated between the neutral points N2 and N3. For the feedback calculation, various known calculation methods (such as proportional-integral control) can be used.

  The multiplication unit 184 multiplies the value obtained by adding the calculation result of the FB calculation unit 182 to the AC voltage reference value Vref (k is a constant not less than 0 and not more than 1), and outputs the calculation result to the second inverter control unit 63. It outputs to the 2nd inverter control part 63 as a voltage command. The subtracting unit 186 subtracts the input value of the multiplying unit 184 from the output value of the multiplying unit 184 and outputs the calculation result to the third inverter control unit 64 as an AC voltage command for the third inverter control unit 64.

  That is, the AC voltage command obtained by adding the calculation result of the FB calculation unit 182 to the AC voltage reference value Vref is multiplied by k and output to the second inverter control unit 63, multiplied by-(1-k), and the third It is output to the inverter control unit 64. That is, the constant k is a voltage burden ratio of the motor generators MG2 and MGR when generating a single-phase AC voltage between the neutral points N2 and N3. If the constant k exceeds 0.5, the burden of the motor generator MG2 is When the constant k is smaller than 0.5, the burden on the motor generator MGR increases.

  Although not specifically shown, the AC output control unit 65A outputs the generated AC voltage command to the second and third inverter control units 63 and 64 when receiving the H level signal AC. When an L level signal AC is received, the AC voltage command output to the second and third inverter control units 63 and 64 is set to zero.

  FIG. 12 is a diagram for explaining the concept of voltage distribution in motor generators MG1, MG2, and MGR. Referring to FIG. 12, system voltage VH supplied to inverters 20, 30, 40 generates a single-phase AC voltage between drive control components for generating torque in each motor generator and neutral points N2, N3. It is used for AC voltage share for

  Here, the AC voltage share in motor generator MG2 is a voltage that contributes to the generation of AC voltage at neutral point N2 of motor generator MG2, and the AC voltage share in motor generator MGR is the neutral point of motor generator MGR. This is a voltage that contributes to the generation of an alternating voltage at N3. The sum of the AC voltage share in motor generator MG2 and the AC voltage share in motor generator MGR (shaded area in the figure) is the single-phase AC voltage generated between neutral points N2 and N3 of motor generators MG2 and MGR. Correspond.

  On the other hand, motor generator MG1 is irrelevant to the generation of the single-phase AC voltage. In motor generator MG1, all of system voltage VH is used for drive control. Therefore, motor generator MG1 can be driven and controlled at a higher voltage than motor generators MG2 and MGR that bear the generation of single-phase AC voltage, and can generate a large back electromotive force. That is, high power regenerative power generation is possible.

  In motor generators MG2 and MGR, PWM control is performed to control the potential at neutral points N2 and N3. However, since motor generator MG1 does not need to control the potential at neutral point N1, PWM control is performed. It is possible to use rectangular wave control or overmodulation control with a higher voltage utilization rate. Therefore, if rectangular wave control or overmodulation control is used for drive control of motor generator MG1, regenerative power generation with higher power becomes possible.

  Furthermore, since motor generators MG2 and MGR can generate a single-phase AC voltage regardless of the drive control for performing regenerative power generation, the single-phase AC voltage can be generated even during regenerative power generation by motor generator MG1. Sufficient voltage for generating is secured. Further, when the vehicle is stopped, motor generators MG2 and MGR all use system voltage VH for generating a single-phase AC voltage.

  As described above, in power output device 100A, motor generator MG1 generates large power and high voltage, and motor generators MG2 and MGR use the generated power to generate large power and high voltage single-phase AC voltage. Can be generated.

  FIG. 13 is a diagram showing voltage distribution when motor generator MG1 is used to generate a single-phase AC voltage. FIG. 13 is shown as a comparison for explaining the effect of the second embodiment.

  Referring to FIG. 13, when motor generator MG1 bears the generation of a single-phase AC voltage, the voltage (drive control amount) that can be used for regenerative power generation using the output from engine 4 is higher than system voltage VH. Less. Therefore, the back electromotive force generated by motor generator MG1 is limited, and the amount of regenerative power generated by motor generator MG1 can be limited.

  Further, since it is necessary to control the potential of the neutral point N1, it is necessary to use PWM control for controlling the motor generator MG1. Therefore, the voltage utilization factor of motor generator MG1 cannot be increased by using rectangular wave control or overmodulation control. Furthermore, during regenerative power generation, the AC voltage share of motor generator MG1 is reduced, and there is a possibility that a single-phase AC voltage having a desired voltage level cannot be generated.

  As described above, in the second embodiment, motor generator MG1 is devoted to power generation using the output of engine 4, and motor generators MG2 and MGR are used to generate AC voltage. Then, all of system voltage VH is used for driving for power generation, and motor generators MG2 and MGR use all of system voltage VH for generating AC voltage. Therefore, according to the second embodiment, it is possible to generate large power and high voltage using motor generator MG1. Then, using the generated electric power, motor generators MG2 and MGR can generate a high power / high voltage AC voltage.

  It should be noted that the first and second embodiments may be functionally combined so that either a three-phase AC voltage or a single-phase AC voltage is generated and output to the load in accordance with a load that is supplied with the AC voltage. .

  FIG. 14 is a diagram showing a configuration of an output portion of an AC voltage in a power output device that can generate both a three-phase AC voltage and a single-phase AC voltage. Referring to FIG. 14, AC port 50 </ b> B is arranged between AC lines ACL <b> 1 to ACL <b> 3 and output terminals 55 and 56. AC port 50B includes relays RY1 to RY3. Relay RY1 is arranged between AC line ACL1 and output line L1. Relay RY2 is arranged between AC line ACL2 and output lines L2 and L4. Relay RY3 is arranged between AC line ACL3 and output lines L3 and L5. Lines L1 to L3 are connected to an output terminal 55 for a three-phase AC load, and lines L4 and L5 are connected to an output terminal 56 for a single-phase AC load.

  The relay RY1 electrically connects the AC line ACL1 to the output line L1 when receiving an H level output enable signal EN1 from a control device (not shown, the same applies hereinafter). On the other hand, relay RY1 electrically disconnects AC line ACL1 from output line L1 when output enable signal EN1 is at the L level.

  The relay RY2 electrically connects the AC line ACL2 to the output line L2 when receiving the H level output permission signal EN1 from the control device. Further, relay RY2 electrically connects AC line ACL2 to output line L4 upon receiving an H level output enable signal EN2 from the control device. On the other hand, relay RY2 electrically disconnects AC line ACL2 from both output lines L2 and L4 when both output enable signals EN1 and EN2 are at the L level.

  The relay RY3 electrically connects the AC line ACL3 to the output line L3 when receiving the H level output permission signal EN1 from the control device. Further, relay RY3 electrically connects AC line ACL2 to output line L5 upon receiving an H level output enable signal EN2 from the control device. On the other hand, relay RY3 electrically disconnects AC line ACL2 from both output lines L3 and L5 when both output enable signals EN1 and EN2 are at the L level.

  That is, AC port 50B electrically connects AC lines ACL1 to ACL3 to output terminal 55 when it receives H level output permission signal EN1, and AC lines ACL2 and ACL3 when it receives H level output permission signal EN2. Are electrically connected to the output terminal 56, and when both the output enable signals EN1 and EN2 are at the L level, the AC lines ACL1 to ACL3 are electrically disconnected from both of the output terminals 55 and 56.

  When the three-phase AC load is connected, the output terminal 55 outputs an H level signal S1 to the control device. Then, the control device controls inverters 20, 30, and 40 so that a three-phase AC voltage is generated at neutral points N1 to N3 according to signal AC, and outputs an H level output enable signal EN1 to AC port 50B. .

  The output terminal 56 outputs an H level signal S2 to the control device when a single-phase AC load is connected. Then, the control device controls inverters 30 and 40 such that a single-phase AC voltage is generated at neutral points N2 and N3 according to signal AC, and outputs an H level output enable signal EN2 to AC port 50B.

  In this manner, a three-phase AC voltage or a single-phase AC voltage is generated according to the load connected to the output terminals 55 and 56, and the connection between the AC lines ACL1 to ACL3 and the output terminals 55 and 56 is AC port 50B. It is switched by.

  In the above description, the connection state of the load to the output terminals 55 and 56 is automatically recognized based on the logic levels of the signals S1 and S2, and the AC voltage generated according to the load (three-phase AC voltage or single-phase AC voltage). ) And its output destination (output terminal 55 or 56) are automatically switched, but a three-phase AC voltage can be generated and output from the output terminal 55, or a single-phase AC voltage can be generated and output terminal An input device may be provided for the user to switch whether output is possible from 56.

  In the second embodiment, motor generator MG1 performs regenerative power generation using the output from engine 4 and generates single-phase AC voltage using motor generators MG2 and MGR. If a motor generator is further mounted in addition to MG1, MG2, and MGR, a three-phase AC voltage can be generated without using motor generator MG1 that generates power.

  FIG. 15 is an overall block diagram of a power output apparatus further including a motor generator MGAC for an air conditioner. Referring to FIG. 15, power output device 100B further includes inverter 48, motor generator MGAC, and AC line ACL4 in the configuration of power output device 100A according to the second embodiment shown in FIG. Instead of the port 50A and the output terminal 56, an AC port 50 and an output terminal 55 are provided.

  Inverter 48 is connected to power supply line PL2 and ground line SL in parallel with inverters 20, 30, and 40. The inverter 48 has the same configuration as the inverter 20 or the like. Inverter 48 converts a DC voltage received from power supply line PL2 into a three-phase AC voltage based on a control signal from control device 60A, and outputs the converted three-phase AC voltage to motor generator MGAC.

  Motor generator MGAC is an electric air-conditioning compressor, and includes a three-phase coil (not shown) like motor generator MG1 and the like. Then, AC line ACL4 is connected to neutral point N4 of the three-phase coil. Motor generator MGAC is driven by the three-phase AC voltage received from inverter 48.

  One end of AC line ACL 4 is connected to neutral point N 4 of the three-phase coil included in motor generator MGAC, and the other end is connected to AC port 50.

  In power output device 100B, three-phase AC voltage is generated at neutral points N1-N3 using inverters 20, 30, 40 and motor generators MG1, MG2, MGR in power output device 100 according to the first embodiment. In the same manner as described above, a three-phase AC voltage is generated at neutral points N2-N4 using inverters 30, 40, 48 and motor generators MG2, MGR, MGAC. That is, the power output device 100B can generate a three-phase AC voltage and supply it to the load from the output terminal 55.

  In power output device 100B, motor generator MG1 that generates power using the output from engine 4 is irrelevant to the generation of the three-phase AC voltage supplied to the load. Therefore, the power output device according to the second embodiment. Similar to 100A, it is possible to generate high-power / high-voltage regenerative power generation and high-power / high-voltage three-phase AC voltage.

  In the above, instead of the AC port 50, an AC port 50B may be provided, and an output terminal 56 for single-phase AC voltage output connected to the AC port 50B may be provided. And you may make it switch the alternating voltage (3-phase alternating voltage or single phase alternating voltage) produced | generated according to load, and its output destination (output terminal 55 or 56).

  In each of the above embodiments, when the AC output switch is operated and the signal AC becomes H level, a three-phase AC voltage or a single-phase AC voltage is generated regardless of whether the vehicle is running or stopped. However, the generation of the three-phase AC voltage or the single-phase AC voltage may be limited when the vehicle is stopped or when the ignition key is in the OFF position. If the vehicle is stopped, motor generators MG2 and MGR can use all of system voltage VH for generating AC voltage, so that high-voltage three-phase AC voltage or single-phase AC voltage is generated according to the load. be able to.

  In the above, the three-phase coils 12, 14, and 16 correspond to “m multi-phase windings” in the present invention, and the inverters 20, 30, and 40 correspond to “m voltage converters” in the present invention. Corresponding to Control device 60 corresponds to “control means” in the present invention, and output terminal 55 corresponds to “first output terminal” in the present invention. Further, output terminal 56 corresponds to “second output terminal” in the present invention, and AC port 50B corresponds to “switching means” in the present invention.

  Furthermore, motor generators MG1, MG2, MGR, and MGAC correspond to “n motors” in the present invention, and inverters 20, 30, 40, and 48 correspond to “n voltage converters” in the present invention. Correspond. Further, motor generators MG2, MGR, and MGAC correspond to “m motors” in the present invention, and motor generator MG1 corresponds to “an electric motor other than m motors among n motors” in the present invention. Correspond. Furthermore, engine 4 corresponds to “internal combustion engine” in the present invention, and inverters 30, 40, and 48 correspond to “m voltage converters” in the present invention.

  Further, three-phase coils 12, 14, and 16 correspond to "first to third multi-phase windings" in the present invention, respectively, and motor generators MG1, MG2, and MGR each correspond to "first To 3rd electric motor ”. Furthermore, inverters 20, 30, and 40 correspond to "first to third voltage converters" in the present invention, respectively.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is shown not by the above description of the embodiments but by the scope of claims for patent, and is intended to include meanings equivalent to the scope of claims for patent and all modifications within the scope.

1 is an overall block diagram of a power output apparatus according to Embodiment 1 of the present invention. It is a functional block diagram of the control apparatus shown in FIG. It is a functional block diagram of the converter control part shown in FIG. It is a detailed functional block diagram of the 1st inverter control part and AC output control part which are shown in FIG. It is a detailed functional block diagram of the 2nd inverter control part and AC output control part which are shown in FIG. It is a detailed functional block diagram of the 3rd inverter control part and AC output control part which are shown in FIG. It is a wave form diagram of the sum total of the switching duty of each inverter, and the three-phase alternating current voltage which generate | occur | produces in a neutral point. It is a whole block diagram of the motive power output device by Embodiment 2 of this invention. It is a functional block diagram of the control apparatus shown in FIG. It is a detailed functional block diagram of the 1st inverter control part shown in FIG. FIG. 10 is a detailed functional block diagram of the AC output control unit shown in FIG. 9. It is a figure for demonstrating the concept of the voltage distribution in a motor generator. It is a figure which shows voltage distribution at the time of using motor generator MG1 for the production | generation of a single phase alternating voltage. It is a figure which shows the structure of the output part of the alternating voltage in the motive power output device which can produce | generate both a three-phase alternating voltage and a single phase alternating voltage. It is a whole block diagram of the power output device further provided with the motor generator for air conditioners.

Explanation of symbols

  2 Front wheel, 3 Rear wheel, 4 Engine, 10 Boost converter, 20, 30, 40, 48 Inverter, 22, 32, 42 U phase arm, 24, 34, 44 V phase arm, 26, 36, 46 W phase arm, 50, 50A, 50B AC port, 55, 56 output terminal, 60, 60A controller, 61 converter controller, 62, 62A first inverter controller, 63 second inverter controller, 64 third inverter controller , 65, 65A AC output control unit, 71, 72 voltage sensor, 100, 100A, 100B power output device, 112 inverter input voltage command calculation unit, 114 feedback voltage command calculation unit, 116 duty ratio calculation unit, 118, 132 PWM signal Conversion unit, 122, 142, 162 Current conversion unit, 124 MG1 current command calculation 126, 128, 136, 146, 148, 156, 166, 168, 176 PI control unit, 130, 150, 170 conversion unit, 134, 154, 174, 184 multiplication unit, 138, 158, 178, 186 subtraction unit, 144 MG2 current command calculation unit, 164 MGR current command calculation unit, 182 FB calculation unit, B power storage device, C1, C2 capacitor, L reactor, Q1, Q2, Q11-Q16, Q21-Q26, Q31-Q36 npn type transistor, D1, D2, D11-D16, D21-D26, D31-D36 Diode, MG1, MG2, MGR, MGAC Motor generator, U1-U3 U-phase coil, V1-V3 V-phase coil, W1-W3 W-phase coil, N1- N4 neutral point, ACL1-ACL4 AC line, PL1, PL Power line, SL ground line, UL1~UL3 U-phase line, VL1~VL3 V-phase line, WL1~WL3 W-phase line, RY1~RY3 relay, L1~L5 output line.

Claims (8)

m (m is a natural number of 3 or more) multi-phase windings;
M voltage converters respectively connected to the m multiphase windings;
Control means for controlling the m voltage converters,
Each of the m polyphase windings is star-connected,
The control means cooperatively controls the m voltage converters so that an m-phase AC voltage is generated at a neutral point of the m multi-phase windings,
Each of the m voltage converters is an AC voltage generator that controls a neutral point potential of a corresponding multiphase winding in response to a command from the control unit. When the control means is requested to generate a single-phase AC voltage, the single-phase AC voltage is generated between neutral points of two multi-phase windings of the m multi-phase windings. Coordinately control two voltage converters connected to two multiphase windings respectively,
2. The AC voltage generator according to claim 1, wherein each of the two voltage converters controls a neutral point potential of a corresponding multiphase winding in accordance with a command from the control unit. A first output terminal for outputting the m-phase AC voltage generated at a neutral point of the m multi-phase windings to an m-phase AC load;
A second output terminal for outputting the single-phase AC voltage generated between neutral points of the two multiphase windings to a single-phase AC load;
Switching means for switching the neutral point of the two multiphase windings from the first output terminal to the second output terminal when generation of the single-phase AC voltage is required. Item 3. The AC voltage generator according to Item 2. N (n is a natural number of 3 or more) motors each including a multiphase winding as a stator winding;
n voltage converters respectively connected to the n multiphase windings;
Control means for controlling the n voltage converters,
Each of the n number of multiphase windings is star-connected,
The control means may generate an m-phase AC voltage at a neutral point of m multiphase windings included in m motors (m is a natural number of 3 to n) among the n motors. , M coordinately control the m voltage converters respectively connected to the m multiphase windings,
Each of the m voltage converters controls a neutral point potential of a corresponding multiphase winding in accordance with a command from the control means. n> m,
Any of the n motors other than the m motors is connected to an internal combustion engine of a vehicle and generates power using the power of the internal combustion engine,
5. The power output apparatus according to claim 4, wherein the m voltage converters generate the m-phase AC voltage at a neutral point of the m multi-phase windings using the generated electric power. When the control means is required to generate a single-phase AC voltage, a single-phase AC voltage is generated between the neutral points of two multiphase windings respectively included in two of the m motors. Two voltage converters connected to the two multiphase windings are controlled in a coordinated manner,
5. The power output apparatus according to claim 4, wherein each of the two voltage converters controls a neutral point potential of a corresponding multiphase winding in response to a command from the control unit. A first output terminal for outputting the m-phase AC voltage generated at a neutral point of the m multi-phase windings to an m-phase AC load;
A second output terminal for outputting the single-phase AC voltage generated between neutral points of the two multiphase windings to a single-phase AC load;
Switching means for switching the neutral point of the two multiphase windings from the first output terminal to the second output terminal when generation of the single-phase AC voltage is required. Item 7. The power output device according to Item 6. First to third electric motors each including first to third multiphase windings as stator windings;
First to third voltage converters respectively connected to the first to third multiphase windings;
Control means for controlling the first to third voltage converters,
Each of the first to third multiphase windings is star-connected,
The first electric motor is connected to an internal combustion engine of a vehicle and generates electric power using the power of the internal combustion engine,
The control means cooperatively controls the second and third voltage converters so that a single-phase AC voltage is generated between neutral points of the second and third multiphase windings;
The second and third voltage converters use the electric power generated by the first electric motor, and neutral points of the second and third multiphase windings according to a command from the control means. A power output device that generates the single-phase AC voltage between them.

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