JP2002010670A - Power-output unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a way for outputting a power by individually driving a plurality of motors using a low DC voltage, and enhancing efficiency of a unit. SOLUTION: A chargeable and dischargeable capacitor 32 is connected to a positive electrode busbar 22 and a negative electrode busbar 24 of inverter circuits INV1, INV2, and a DC power 30 is connected to the negative electrode busbar 24 and a neutral point of a motor MG1. Transistors T11 to T16 of the inverter circuit INV1 are switch-controlled based on a phase-voltage command value to which a DC component and an AC component are added. And also, an inter-terminal voltage of the capacitor 32 is controlled by the DC component using a voltage higher than that of the DC power 30, and the motor MG1 is drive-controlled by the AC component as well. Then, the motor MG2 is drive- controlled individually from the motor MG1 by switch-controlling transistors T21 to T26 of the inverter circuit INV2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a power output device.

[0002]

2. Description of the Related Art Conventionally, as a power output device of this type,
It is proposed to provide a capacitor connected to the positive and negative buses of the inverter circuit that applies three-phase AC to the motor, and a DC power supply connected to the positive or negative bus of the inverter circuit and the neutral point of the motor. (For example, JP-A-10-337047 and JP-A-11-1).
78114). In this device, a circuit composed of a coil for each phase of a motor and a switching element for each phase of an inverter is regarded as a boost chopper circuit that boosts the voltage of a DC power supply and stores electric charge in a capacitor, and uses the stored capacitor as a DC power supply. And the motor is driven.
The drive control of the motor and the storage control of the capacitor are performed simultaneously by the switching operation of the switching element of the inverter circuit which is performed when applying the three-phase alternating current to the motor.

[0003]

However, in such a power output device, a single motor can be driven using a low-voltage DC power supply, but a plurality of motors can be independently driven using a low-voltage DC power supply. It is difficult to drive.

An object of the power output apparatus of the present invention is to output power by driving a plurality of motors independently using a low DC voltage. Another object of the power output device of the present invention is to increase the efficiency of the device.

[0005]

The power output device of the present invention employs the following means in order to achieve at least a part of the above object.

A first power output device according to the present invention is a power output device capable of outputting power, and comprises a first motor that is driven to rotate by a polyphase alternating current, and a polyphase by a switching operation of a plurality of switching elements. A first inverter circuit capable of supplying AC power to the first motor, one of a positive bus and a negative bus of the first inverter circuit, and a neutral point of the first motor; Connected to the first power supply means and a second power supply means rotationally driven by the polyphase AC.
And a second bus capable of supplying multiphase AC power to the second motor by switching operation of a plurality of switching elements, wherein a positive bus and a negative bus are connected to a positive bus and a negative bus of the first inverter circuit. And a chargeable and dischargeable power storage means connected to the positive and negative buses of the first inverter circuit.

In the first power output device of the present invention, a circuit composed of a coil of each phase of a first electric motor that is rotationally driven by a polyphase alternating current and a switching element of each phase of a first inverter circuit is a first power output device. Can be regarded as a circuit for boosting the power using the power of the power supply means and storing the electric charge in the power storage means, and the power storage means can be regarded as a DC power supply capable of driving the first motor and the second motor. That is, a circuit including the coils of each phase of the first motor and the switching elements of each phase of the first inverter circuit uses the power of the first power supply means by the switching operation of the switching elements of the first inverter circuit. By synchronizing the switching operation with the switching operation at the time of driving the first electric motor, the charging of the electric storage means and the driving of the first electric motor can be performed at the same time. The second electric motor can be rotationally driven by the switching operation of the switching element of the second inverter circuit using the electric power stored in the means. In addition, the switching operation of the first inverter circuit and the switching operation of the second inverter circuit can be performed independently.
And the second motor can be driven independently. That is, a plurality of electric motors can be independently driven using low-voltage power supply means.

[0008] In the first power output device of the present invention, the first power output device may be provided with a first drive power storage control means for controlling the driving of the first electric motor and controlling the power storage state of the power storage means. The first aspect of the present invention in this aspect
In the power output device, the first drive / storage control means adjusts the polyphase AC applied to the first motor and adjusts the charge / discharge of the power storage means.
Means for controlling the switching of the plurality of switching elements of the inverter circuit of
The multi-phase AC capable of outputting the target power from the motor
And a means for controlling switching of the plurality of switching elements of the first inverter circuit so that the voltage between the terminals of the power storage means becomes a target voltage while being applied to the electric motor.

Further, in the first power output apparatus of the present invention, one of the positive bus and the negative bus of the second inverter circuit is connected to a neutral point of the second motor. And a second power supply means. With this configuration, the power storage unit can be charged using the power of the second power supply unit.

In the first power output device of the present invention having such a second power supply means, a second drive power storage control for controlling the driving of the second motor and controlling the power storage state of the power storage means. Means may be provided. In the second power output apparatus according to the aspect of the present invention, the second drive power storage control means adjusts the polyphase alternating current applied to the second electric motor and adjusts charging / discharging of the power storage means. A means for controlling the switching of the plurality of switching elements of the second inverter circuit, or a polyphase alternating current capable of outputting target power from the second motor is applied to the second motor. Further, it may be a means for controlling switching of the plurality of switching elements of the second inverter circuit so that a voltage between terminals of the power storage means becomes a target voltage.

A second power output device according to the present invention is a power output device capable of outputting power, and comprises a first motor that is rotationally driven by a polyphase alternating current, and a polyphase by a switching operation of a plurality of switching elements. A first inverter circuit capable of supplying AC power to the first motor, one of a positive bus and a negative bus of the first inverter circuit, and a neutral point of the first motor; Connected to the first power supply means and a second power supply means rotationally driven by the polyphase AC.
And a second bus capable of supplying multiphase AC power to the second motor by switching operation of a plurality of switching elements, wherein a positive bus and a negative bus are connected to a positive bus and a negative bus of the first inverter circuit. Connected to the other of the positive and negative buses of the first inverter circuit, to which the first power supply means is not connected, and to the neutral point of the first motor. A first power storage means capable of charging and discharging is provided.

In the second power output apparatus of the present invention, the first power supply means is connected to one of the positive bus and the negative bus of the first inverter circuit and the neutral point of the motor. The first power storage means capable of charging and discharging is connected to the other of the positive bus and the negative bus of the first inverter circuit, to which the first power supply means is not connected, and the neutral of the first motor. Connected to the point, the first
The first power supply means and the first power storage means connect the positive power bus and the negative power bus of the first inverter circuit in series, and the first power supply means and the first power storage means are integrated. The first electric motor and the second electric motor can be driven assuming that they are power sources. A circuit including a coil of each phase of the first motor and a switching element of each phase of the first inverter circuit uses a power of the first power supply means by switching operation of the switching element of the first inverter circuit. 1
The charging operation of the first electric storage means and the driving of the first electric motor can be performed simultaneously by synchronizing the switching operation with the switching operation at the time of driving the first electric motor. . Also, the second motor is independent of the first motor by performing switching operation on the switching element of the second inverter circuit by regarding the first power supply means and the first power storage means as an integrated power supply. Can be driven. In addition, the withstand voltage of the first power storage means is a value obtained by subtracting the voltage of the first power supply means from the voltage required for driving the first electric motor and the second electric motor. The voltage can be lower than the voltage of the bus and the negative bus. As a result, it is possible to reduce the size and cost of the first power storage means, that is, to reduce the size and cost of the device, and to improve the durability and stabilization as the withstand voltage of the first power storage means decreases. Can be achieved.

[0013] In the second power output device of the present invention, the first electric motor is driven and controlled and the first electric motor is controlled.
And a first driving power storage control means for controlling the power storage state of the power storage means. In the second power output device according to the aspect of the present invention, the first drive power storage control means adjusts the polyphase alternating current applied to the first electric motor and controls charging and discharging of the first power storage means. A means for controlling the switching of the plurality of switching elements of the first inverter circuit so as to adjust, or a polyphase alternating current capable of outputting a target power from the first electric motor is supplied to the first electric motor. It may be a means for controlling the switching of the plurality of switching elements of the first inverter circuit so that the voltage is applied and the voltage between the terminals of the first power storage means becomes a target voltage.

Further, in the second power output apparatus according to the present invention, one of the positive bus and the negative bus of the second inverter circuit is connected to a neutral point of the second electric motor. A second power supply means, and the other of the positive and negative buses of the second inverter circuit, to which the second power supply means is not connected, and a neutral point of the second electric motor. And a chargeable / dischargeable second power storage means connected to the power supply. With this configuration, the second power supply means is connected to one of the positive bus and the negative bus of the second inverter circuit and the neutral point of the motor, and the second power supply means is capable of charging and discharging.
Is connected to the other bus of the positive and negative buses of the second inverter circuit, to which the second power supply means is not connected, and to the neutral point of the second motor. The second power supply means and the second power storage means connect the positive bus and the negative bus of the second inverter circuit in series, and the second power supply means and the second power storage means are integrated. And the first motor and the second motor can be driven. A circuit including a coil of each phase of the second motor and a switching element of each phase of the second inverter circuit uses the power of the second power supply means by switching operation of the switching element of the second inverter circuit. The second power storage means can be charged, and the switching operation of the second power storage means is synchronized with the switching operation at the time of driving the second electric motor, thereby simultaneously charging the second power storage means and driving the second electric motor. it can. Further, the first electric motor is independent of the second electric motor by performing the switching operation of the switching element of the first inverter circuit by regarding the second power supply means and the second power storage means as an integrated power supply. Can be driven. And the second
In the same manner as the first power storage means, the withstand voltage of the power storage means can be lower than the voltages of the positive and negative buses of the second inverter circuit. As described above, by providing the second power supply means and the second power storage means in addition to the first power supply means and the second power storage means, multiplexing of power supplies can be achieved, and more stable power Can be output.

[0015] In the second power output apparatus of the present invention in which the second power supply means and the second power storage means are provided, the drive of the second motor is controlled and the second power output is controlled.
And a second driving power storage control means for controlling the power storage state of the power storage means. In the second power output apparatus according to the aspect of the present invention, the second drive power storage control means adjusts the polyphase AC applied to the second electric motor and controls charging and discharging of the second power storage means. A means for controlling the switching of the plurality of switching elements of the second inverter circuit so as to make adjustment, or a polyphase alternating current capable of outputting target power from the second electric motor is supplied to the second electric motor. It may be a means for controlling switching of the plurality of switching elements of the second inverter circuit so that the applied voltage is applied and a voltage between terminals of the second power storage means becomes a target voltage.

Further, the second power output apparatus of the present invention may include a third chargeable and dischargeable power storage means connected to the positive bus and the negative bus of the first inverter circuit. .

In the first or second power output device of the present invention, the first motor and / or the second motor is a generator motor capable of generating power by inputting power.
The first power supply means is a chargeable / dischargeable means that drives the first motor and / or the second motor as a generator and uses electric power generated by the motor driven as the generator. The first inverter circuit and / or the second inverter circuit to control switching of a switching element so as to charge the first power supply unit. With this configuration, power output and power generation can be performed as needed, so that a device with high energy use efficiency can be provided. In this aspect of the first or second power output apparatus of the present invention, wherein the second power supply means is a chargeable / dischargeable means, and wherein the first electric motor is provided. And / or driving the second motor as a generator and charging the second power supply means using the power generated by the motor driven as the generator, and / or charging the second power supply means. A second charging control means for controlling switching of a switching element of the second inverter circuit may be provided. In this case, the output of the power and the power generation by the power can be further performed as needed, so that a device with higher energy use efficiency can be obtained.

[0018]

Other Embodiments of the Invention The present invention can take the following embodiments in addition to the above-described embodiments.

A power output device according to another aspect is a power output device capable of outputting power, comprising: a first electric motor that is rotationally driven by a polyphase alternating current having a first carrier frequency; A second electric motor that is rotationally driven by a polyphase alternating current and a switching operation of a plurality of switching elements convert the DC power to a polyphase AC power obtained by mixing the first carrier frequency and the second carrier frequency. A power conversion circuit, and converting the converted polyphase AC power to the first
And a power distribution unit that distributes the divided multi-phase AC power to the corresponding first and second motors. That is the gist.

In the power output device according to another aspect of the present invention, the DC power is converted into the multi-phase AC power obtained by mixing the first carrier frequency and the second carrier frequency by the switching operation of the plurality of switching elements in the power conversion circuit. The converted polyphase AC power is divided by the power distribution means into a first carrier frequency component and a second carrier frequency component, and the distributed polyphase AC power is distributed to a corresponding first motor and a second motor. And the second motor. Therefore, two electric motors can be driven by one power conversion circuit. As a result, the size and cost of the device can be reduced.

In the power output device according to another aspect, the power distribution means includes a first band-pass filter that selectively transmits the first carrier frequency component of the converted polyphase AC power, And a second bandpass filter that selectively transmits the second carrier frequency component of the converted multiphase AC power.

[0022]

Next, embodiments of the present invention will be described with reference to examples. FIG. 1 is a configuration diagram schematically showing the configuration of a power output device 20 according to one embodiment of the present invention. As shown, the power output device 20 of the embodiment includes a motor MG1 that is rotationally driven by three-phase AC, an inverter circuit INV1 that can convert DC power into three-phase AC power and supply the three-phase AC power to the motor MG1, and a three-phase AC Motor M driven to rotate by
G2, and convert the DC power to three-phase AC power to convert the motor MG
Inverter circuit INV2 that can be supplied to the inverter 2 and a DC power supply 3 connected to the inverter bus INV1 and the negative bus 24 of the inverter circuit INV2 and the neutral point of the motor MG1.
0, the inverter circuit INV1 and the inverter circuit I
It includes a capacitor 32 connected to the positive bus 22 and the negative bus 24 of the NV2, and an electronic control unit 40 for controlling the entire device.

Each of the motors MG1 and MG2 is configured as a synchronous generator motor capable of generating electric power, for example, comprising a rotor having a permanent magnet attached to the outer surface thereof and a stator having a three-phase coil wound thereon. The rotation shaft of the motor MG1 is the output shaft of the power output device 20 according to the embodiment, and power is output from this rotation shaft. The rotating shaft of the motor MG2 is indirectly connected to the output shaft of the power output device 20 of the embodiment, so that the power from the motor MG2 can also be indirectly output to the output shaft of the power output device 20. . Since the motors MG1 and MG2 of the embodiment are configured as generator motors, power can be input to the rotating shafts of the motors MG1 and MG2 so that the motors MG1 and MG2 can generate power.

Each of the inverter circuits INV1 and INV2 has six transistors T11 to T16 and T21 to T26.
And six diodes D11 to D16, D21 to D26
It is composed of Six transistors T11 to T11
T16 and T21 to T26 are set so that they are on the source side and the sink side with respect to the positive electrode bus 22 and the negative electrode bus 24, respectively.
The motors MG1 and M
Each of the three-phase coils (uvw) of G2 is connected.
Therefore, transistors T11 to T1 forming a pair in a state where a voltage is applied to positive electrode bus 22 and negative electrode bus 24
6, if the ratio of the ON time of T21 to T26 is controlled, a rotating magnetic field is formed by the three-phase coils of the motors MG1 and MG2, and the motors MG1 and MG2 can be driven to rotate. Transistors T11-T of inverter circuit INV1
16 and the switching control of the transistors T21 to T26 of the inverter circuit INV2 can be performed independently, so that the motors MG1 and MG2 can be independently driven and controlled.

The electronic control unit 40 is configured as a microprocessor mainly including a CPU 42, and includes a ROM 44 storing a processing program, a RAM 46 temporarily storing data, and an input / output port (not shown). Prepare. The electronic control unit 40 includes a motor MG
1, the currents of the respective phases from the current sensors 51 to 53, 61 to 63 attached to the respective phases of uvw of the three-phase coil of the MG2 and the current sensors 5 attached to the neutral point of the motor MG1
4, the rotation angles of the rotors of the motors MG1 and MG2 from the rotation angle sensors 56 and 66 attached to the respective rotation shafts of the motors MG1 and MG2, and the capacitor 32
32 from the voltage sensor 68 attached to
, A command value relating to the operation of the motor MG1 and the motor MG2, and the like are input via an input port. Further, the electronic control unit 40 outputs the transistors T11 to T16 of the inverter circuits INV1 and INV2.
Control signals for performing switching control of T21 to T26 are output via the output port.

FIG. 2 is a circuit diagram of a part of the power output device 20 of the embodiment focusing on the u-phase of the three-phase coil of the motor MG1. Now, considering a state in which the u-phase transistor T12 of the inverter circuit INV1 is turned on, in this state, a short circuit indicated by a broken arrow in the drawing is formed, and the motor M
The u phase of the three-phase coil of G1 functions as a reactor.
When the transistor T12 is turned off from this state, the energy stored in the u-phase of the three-phase coil functioning as a reactor is stored in the capacitor 32 by the charging circuit shown by the solid line arrow in the figure. The voltage at that time is the DC power supply 30
Supply voltage. On the other hand, the DC power supply 30 can be charged using the potential of the capacitor 32 in this circuit. Therefore, this circuit boosts and stores the energy of the DC power supply 30 in
It can be regarded as a step-up / step-down chopper circuit that can charge the DC power supply 30 using the potential of 2. The vw phase of the three-phase coil of the motor MG1 can be regarded as a step-up / step-down chopper circuit similarly to the u-phase, so that the transistors T12, T14,
The capacitor 32 can be charged by turning on and off T16, and the DC power supply 30 can be charged using the potential of the capacitor 32.

Such charging causes a potential difference between the terminals of the capacitor 32, and the potential difference is
Can be controlled by adjusting the amount of charge stored in the reactor, that is, the current flowing through the reactor. Therefore,
The voltage Vc between the terminals of the capacitor 32 can be set to twice the value of the supply voltage Vb of the DC power supply 30. in this way,
If the voltage Vc between the terminals of the capacitor 32 is twice the value of the supply voltage Vb of the DC power supply 30, the power output device 20 shown in FIG.
2, a voltage twice as high as the supply voltage Vb of the DC power supply 30 is applied, and the inverter circuits INV1 and INV2
By controlling the switching of the transistors T11 to T16 and T21 to T26, the motors MG1 and MG2 can be driven independently.

In order to drive the motor MG1, a pseudo three-phase alternating current is supplied to the three-phase coil of the motor MG1 by switching control of the transistors T11 to T16 constituting the inverter circuit INV1. A DC component can be added to the phase AC. That is, the potential of the pseudo three-phase alternating current is offset to the plus side or the minus side. When the three-phase AC to which the DC component is added is supplied to the motor MG1 in this manner, the motor MG1 has the AC component.
Can be driven to rotate and charge the capacitor 32 with the DC component as described with reference to FIG. That is, the capacitor 32 can be charged at the same time as driving the motor MG1. At this time, the voltage Vc between terminals of the capacitor 32 can be controlled by adjusting the magnitude of the DC component.

Next, the operation of the power output device 20 of the embodiment configured as described above will be described. FIG. 3 is an explanatory diagram illustrating a calculation block when calculating a control signal output to the inverter circuits INV1 and INV2 by the electronic control unit 40 of the power output device 20 of the embodiment. As shown in the figure, the arithmetic block includes a motor MG1 phase current command value setting unit M1 for setting a phase current command value of the motor MG1 based on an input operation command value of the motor MG1, and a motor from the current sensors 51 to 53. A motor that calculates a phase potential command value for operating the motor MG1 (a phase potential command value of an AC component) based on each phase current of the MG1, the neutral point current from the current sensor 54, and the phase current command value of the motor MG1. MG1 operation phase potential command value calculation unit M2, and input motor MG
Motor MG2 phase current command value setting unit N1 for setting the phase current command value of motor MG2 based on the operation command value of motor MG2, each phase current of motor MG2 from current sensors 61-63, and phase current command value of motor MG2 And a phase potential command value calculating section N2 for operating the motor MG2, which calculates a phase potential command value for operating the motor MG2 based on the above, and converts the phase potential command value for operating the motor MG2 into a PWM signal to convert it into a PWM signal.
2 PWM signal converter N for inverter INV2 that outputs to
6 based on the rotation speed of the rotor of motor MG1 obtained based on the rotation angle from rotation angle sensor 56 and the phase current command values of motors MG1 and MG2.
An inverter input voltage command value calculation unit M3 for calculating an inverter input voltage command value as a voltage command value between the inverter bus and the negative bus 24; a voltage Vc between terminals of the capacitor 32 from the voltage sensor 68; A phase potential command value calculating unit M4 for setting an inverter input voltage based phase voltage command value (a DC component phase potential command value) based on the inverter input voltage adjustment, and a motor MG serving as an AC component
A phase potential command value adder M5 for adding the phase potential command value for operation 1 and the inverter input voltage adjustment phase potential command value as a DC component; and a phase potential command value obtained by adding an AC component and a DC component. Is converted into a PWM signal, and the inverter circuit IN
And a PWM signal converter M6 for the inverter INV1 that outputs the signal to V1. With such an arithmetic block, the terminal voltage Vc of the capacitor 32 is controlled, and independent drive control of the motors MG1 and MG2 is enabled.

FIG. 4 is a configuration diagram schematically showing the configuration when the power output device 20 of the embodiment is applied as a part of the power output device 10 of a vehicle. This vehicle power output device 10
The motor MG2 is connected to an engine EG as an internal combustion engine, a planetary gear PG carrier-connected to a crankshaft 11 of the engine EG, and a rotating shaft connected to a sun gear of the planetary gear PG, and is connected to a ring gear of the planetary gear PG. The motor M is attached to the drive shaft 12.
A power output device 20 according to the embodiment to which G1 is connected, and an electronic control unit 16 that controls the entire vehicle power output device 10 are provided. The drive shaft 12 is connected to drive wheels 14 and 15 via a differential gear 13, and the power output to the drive shaft 12 ultimately
15 is output. The power output device 20 of the embodiment uses a motor M
Although it can be directly output to the drive shaft 12 by G2,
The power output from the engine EG can be converted into torque and output to the drive shaft 12 by the planetary gear PG. That is, the engine EG is operated at an efficient operation point,
The rotation speed and torque are converted into the rotation speed and torque of the drive shaft 12 and output to the drive shaft 12. Therefore,
The motors MG1 and MG2 are driven as electric motors or generators as necessary. At this time, the capacitor 3
2 is also charged by a motor functioning as a generator, and its terminal voltage Vc can be controlled by the exchange of energy between the capacitor 32 and the DC power supply 30. In addition to the operation of the torque conversion, the DC power supply 30 is charged using a part of the power from the engine EG, and the drive shaft 12 is used by the electric power from the DC power supply 30 together with the torque conversion of the power from the engine EG. Power can also be added. Further, when a braking force is applied to the drive wheels 14, 15, the DC power supply 30 can be charged with electric power obtained by regeneratively controlling the motor MG1.

According to the power output device 20 of the embodiment described above, the transistor T11 of the inverter circuit INV1 is used.
To T16 to control the voltage Vc between the terminals of the capacitor 32 and the motor MG1.
Can be controlled. In addition, the inverter circuit I
By controlling the switching of the transistors T21 to T26 of the NV2, the driving of the motor MG2 can be controlled independently of the motor MG1. Moreover, the inverter circuit I
The capacitor 32 connected to the positive bus 22 and the negative bus 24 of NV1 and INV2 is boosted and charged by using the energy of the DC power supply 30, so that the supply voltage V
b can be made lower than the voltage required for driving the motor 22. Since the voltage Vc between the terminals of the capacitor 32 can be controlled, it can be set to a more appropriate value according to the driving of the motor MG1 or the motor MG2. As a result, the energy efficiency of the device can be improved.

In the power output apparatus 20 of the embodiment, the negative power bus 24 of the inverter circuits INV1 and INV2 and the motor MG
The DC power supply 30 is connected to the neutral point of the inverter 1 and the positive power bus 22 of the inverter circuits INV1 and INV2 and the motor M as shown in a power output device 20B of a modified example illustrated in FIG.
The DC power supply 30B may be connected to the neutral point of G1. The power output device 20B of this modification also controls the terminal voltage Vc of the capacitor 32B and controls the motor M by controlling the switching of the transistors T11 to T16.
G1 can be driven and controlled.

In the power output device 20 of the embodiment, the negative bus 24 of the inverter circuits INV1 and INV2 and the motor MG
The DC power supply 30 is connected to the neutral point of the power output device 20 of FIG. 6, but as shown in a power output device 20C of a modified example illustrated in FIG.
The DC power supply 70 may be connected to the negative bus 24 of V1 and INV2 and the neutral point of the motor MG2. In the power output device 20C of this modification, the inverter circuit INV
By the switching control of the two transistors T21 to T26, the voltage Vc between the terminals of the capacitor 32 can be controlled and the drive of the motor MG2 can be controlled. That is, in the power output device 20C of the modified example, the inverter circuit INV
1 and the switching control by the transistors T11 to T16 and the transistors T21 to T21 of the inverter circuit INV2.
The capacitor 32 can be charged by both the switching control by the switching control unit 26 and the switching control by the switching control unit 26. As described in the power output device 20B of the modified example illustrated in FIG. 5, the DC power supply 30 may be attached so as to connect the positive bus 22 and the neutral point of the motor MG1. Either or both of the power supplies 70 may be attached to connect the positive bus 22 to the neutral point of the corresponding motor.

Next, a description will be given of a power output device 120 according to a second embodiment of the present invention. FIG. 7 is a configuration diagram schematically illustrating the configuration of the power output device 120 according to the second embodiment. As shown, the power output device 120 of the second embodiment has the same configuration as the power output device 20 of the first embodiment except that the arrangement of the condenser 132 is different. Therefore, among the configurations of the power output device 120 of the second embodiment, the same components as those of the power output device 20 of the first embodiment are denoted by the same reference numerals, and description thereof will be omitted. In the power output device 120 of the second embodiment, the capacitor 132 is attached to connect the positive bus 22 of the inverter circuits INV1 and INV2 to the neutral point of the motor MG1.

FIG. 8 is a circuit diagram of a part of the power output device 120 of the second embodiment focusing on the u-phase of the three-phase coil of the motor MG1. Now, considering a state where the u-phase transistor T12 of the inverter circuit INV1 is turned on, in this state, a short circuit indicated by a broken line arrow is formed, and the u-phase of the three-phase coil of the motor MG1 functions as a reactor. . When the transistor T12 is turned off from this state, the energy stored in the u-phase of the three-phase coil functioning as a reactor is stored in the capacitor 132 by the charging circuit shown by the solid arrow in the figure. On the other hand, by turning off the transistor T11 from the on state in this circuit, the DC power supply 13
0 can also be charged. This circuit is a DC power supply 13
It can be regarded as a chopper circuit that stores the energy of 0 in the capacitor 132 and can charge the DC power supply 130 using the potential of the capacitor 132. Since the vw phase of the three-phase coil of the motor MG1 can be regarded as a chopper circuit similarly to the u phase, the capacitor 132 is charged by turning on / off the transistors T11 to T16, The power supply 130 can be charged.

Such charging causes a potential difference between the terminals of the capacitor 132, and the potential difference is
It can be controlled by adjusting the amount of electric charge stored in the reactor 32, that is, the current flowing through the reactor. Therefore, the voltage Vc between terminals of the capacitor 132 is
The supply voltage Vb may be 0. As described above, when the terminal voltage Vc of the capacitor 32 is set to the supply voltage Vb of the DC power supply 130, the power output device 120 shown in FIG. Supply voltage V of DC power supply 130
b is connected to a DC power supply having a voltage twice as high as that of the transistor T11 of the inverter circuits INV1 and INV2.
The motors MG1 and MG2 can be driven independently by controlling the switching of T16 to T16 and T21 to T26.

The power output device 120 of the second embodiment as described above
The drive control of the motor MG1 and the charge control of the capacitor 132 in the same manner as in the power output device 20 of the first embodiment,
Transistor T11 forming inverter circuit INV1
Since the pseudo three-phase alternating current by the switching control of T16 to T16 may be obtained by adding a DC component, the potential of the pseudo three-phase alternating current may be offset to the plus side or the minus side. Therefore, also in the power output device 120 of the second embodiment, the transistors T11 to T11 of the inverter circuits INV1 and INV2 are used by using the operation block illustrated in FIG.
Switching control of T16, T21 to T26 can be performed.

The power output device 1 according to the second embodiment described above.
According to 20, the same effect as that exhibited by the power output device 20 of the first embodiment, that is, the terminal voltage Vc of the capacitor 132 by the switching control of the inverter circuit INV <b> 1.
And the drive control of the motor MG1 can be performed simultaneously, and the switching control of the inverter circuit INV2 can control the drive of the motor MG2 independently of the motor MG1. Moreover, in the power output device 120 of the second embodiment, the positive bus 22 and the negative bus 24 are connected to the capacitor 132 and the DC power supply 1.
Since the connection state is established by the DC power supply consisting of 30, the withstand voltage of the capacitor 132 can be made smaller than the withstand voltage of the capacitor 32 of the first embodiment. As a result, the size and cost of the device can be reduced, and the durability and stability can be improved. The power output device 120 of the second embodiment is also similar to the power output device 20 of the first embodiment in FIG.
Can be applied as a part of the vehicle power output device 10.

In the power output device 120 of the second embodiment, the positive electrode bus 22 and the neutral point of the motor MG1 are connected by the capacitor 132, and the negative electrode bus 24 and the neutral point of the motor MG1 are connected by the DC power supply 130. However, as shown in the power output device 120B of the modified example of FIG. 9, the DC bus 130B and the motor MG
1 and the capacitor 132B may be used to connect the negative bus 24 and the neutral point of the motor MG1. Power output device 120B of this modified example
However, by controlling the switching of the transistors T11 to T16, the voltage Vc between the terminals of the capacitor 132B can be controlled and the drive of the motor MG1 can be controlled.

In the power output device 120 of the second embodiment, the positive bus 22 and the negative bus 24 of the inverter circuits INV1 and INV2 are connected in series by the capacitor 132 and the DC power supply 130. Device 12
As shown at 0C, a capacitor 170 for connecting the positive bus 26 and the negative bus 28 may be provided. In this case, the transistor T1 of the inverter circuit INV1
1 to T16 and the transistor T of the inverter circuit INV2
Surge absorption to 21 to T26 can be quickly performed. This capacitor 170 is connected to the transistor T11
To T16, T21 to T26 for absorbing the surge, the capacitance may be very small.
If the energy is stored in the same manner as described above, the capacity is increased.

In the power output device 120 of the second embodiment, the DC power supply 130 is connected to the negative bus 24 of the inverter circuits INV1 and INV2 and the neutral point of the motor MG1, and the positive power bus 22 and the neutral point of the motor MG1 are connected. Capacitor 1
However, as shown in a power output device 120D of a modified example illustrated in FIG. 11, in addition to the configuration of the power output device 120 of the second embodiment, the inverter circuits INV1 and INV
The DC power supply 140 may be connected to the negative electrode bus 24 of the second motor and the neutral point of the motor MG2. In the power output device 120D of this modification, by controlling the switching of the transistors T21 to T26 of the inverter circuit INV2, it is possible to control the voltage Vc between the terminals of the capacitor 132 and to control the drive of the motor MG2. That is, in the power output device 120D of the modified example, switching control by the transistors T11 to T16 of the inverter circuit INV1 and the transistors T21 to T26 of the inverter circuit INV2 are performed.
And the switching control by the capacitor 1
32 can be charged. As described in the power output device 120B of the modified example illustrated in FIG. 9, the DC power supply 130 may be attached so as to connect the positive bus 22 and the neutral point of the motor MG1. In addition to the configuration of power output device 120B, DC power supply 140 may be connected to negative electrode bus 24 and the neutral point of motor MG2. Further, in addition to the configuration of the power output device 120 of the second embodiment and the configuration of the power output device 120C of the modification of FIG. 10, a DC power supply 140 may be connected to the positive bus 22 and the neutral point of the motor MG2. Good. Further, as shown in a power output device 120E of a modified example illustrated in FIG.
The capacitor 142 may be connected to the positive bus 22 and the neutral point of the motor MG2.

The power output device 2 of the first embodiment described above
0 and the power output device 120 of the second embodiment and the modifications thereof have been described as being applicable as a part of the vehicle power output device 10, but the power output of a mobile object such as a ship or an aircraft other than a vehicle or a stationary device is described. It can be applied as a part of an output device or a power output device.

Next, a power output device 220 according to a third embodiment of the present invention will be described. FIG. 13 is a configuration diagram schematically illustrating a configuration of a power output device 220 according to the third embodiment. Third
As shown, the power output device 220 of the embodiment includes a three-phase alternating current carried by a first carrier frequency and a first carrier frequency by carrying out switching operation of six transistors to transfer the DC power from the DC power source 230. An inverter circuit 232 for converting the three-phase alternating current carried by a second carrier frequency different from that of the mixed three-phase alternating current into mixed three-phase alternating current power; 236, a band-pass filter 244 for extracting the second carrier frequency component from the mixed three-phase AC power and supplying the same to the motor 246, and an electronic control unit 250 for controlling the entire apparatus.

The motors 236 and 246 are configured as synchronous generator motors, similarly to the motors MG1 and MG2 of the first embodiment. The inverter circuit 232 is based on a control signal from the electronic control unit 250, and is conveyed by the three-phase alternating current carried by the first carrier frequency when driving the motor 236 and the second carrier frequency by which the motor 246 is driven. The six transistors are switched so as to obtain a mixed three-phase alternating current obtained by mixing the three-phase alternating current.

The electronic control unit 250 has a CPU 252
And a ROM 254 storing a processing program, a RAM 256 temporarily storing data, and an input / output port (not shown). The motor currents from the current sensors 238 and 248 attached to the three-phase coils of the motors 236 and 246, the operation command values of the motors 236 and 246, and the like are input to the electronic control unit 250 through input ports. Further, a control signal or the like to the inverter circuit 232 is output from the electronic control unit 250 via an output port. In the electronic control unit 250, the motor 2 is transported at the first carrier frequency based on the operation command values of the motors 236 and 246 and the motor current.
The switching for forming a mixed three-phase AC formed by mixing the three-phase alternating current to be applied to the motor 36 and the three-phase alternating current carried by the second carrier frequency and applied to the motor 246 is calculated, and the inverter circuit 232 is used as a control signal. Output to The inverter circuit 232 receives the control signal and switches the six transistors.

The power output device 2 of the third embodiment described above
According to 20, the drive of the motor 236 and the motor 246 can be controlled by one inverter circuit. Therefore, the size and cost of the device can be reduced.

The embodiments of the present invention have been described with reference to the embodiments. However, the present invention is not limited to these embodiments, and various embodiments may be made without departing from the gist of the present invention. Of course, it can be carried out.

[Brief description of the drawings]

FIG. 1 is a configuration diagram schematically showing the configuration of a power output device 20 according to one embodiment of the present invention.

FIG. 2 is a circuit diagram of a part of the power output device 20 of the embodiment focusing on the u-phase of the three-phase coil of the motor MG1.

FIG. 3 is an explanatory diagram illustrating a calculation block when calculating a control signal output to the inverter circuits INV1 and INV2 by the electronic control unit 40 of the power output device 20 according to the embodiment.

FIG. 4 is a configuration diagram schematically showing a configuration when the power output device 20 of the embodiment is applied to a power output device of a vehicle.

FIG. 5 is a configuration diagram schematically showing a configuration of a power output device 20B according to a modification.

FIG. 6 is a configuration diagram schematically showing a configuration of a power output device 20C according to a modification.

FIG. 7 is a configuration diagram schematically illustrating a configuration of a power output device 120 according to a second embodiment.

FIG. 8 is a circuit diagram of a part of a power output device 120 according to a second embodiment focusing on the u-phase of the three-phase coil of the motor MG1.

FIG. 9 is a configuration diagram schematically illustrating a configuration of a power output device 120B according to a modification.

FIG. 10 is a configuration diagram schematically showing a configuration of a power output device 120C of a modified example.

FIG. 11 is a configuration diagram schematically showing a configuration of a power output device 120D according to a modification.

FIG. 12 is a configuration diagram schematically illustrating a configuration of a power output device 120E according to a modification.

FIG. 13 is a configuration diagram schematically illustrating a configuration of a power output device 220 according to a third embodiment.

[Explanation of symbols]

10 power output device for vehicle, 11 crankshaft,
12 drive shaft, 13 differential gear, 14, 1
5 drive wheels, 16 electronic control units, 20, 20B,
20C, 120, 120B, 120C, 120D, 12
0E, 220 power output device, 22 positive electrode bus, 24 negative electrode bus, 30, 30B, 70, 130, 130B, 14
0 DC power supply, 32, 132, 132B, 142 Capacitor, 40, 250 Electronic control unit, 42, 25
2 CPU, 44, 254 ROM, 46, 256 RA
M, 51-54, 61-64 Current sensor, 56, 66
Rotation angle sensor, 68 voltage sensor, 170 capacitor, 230 DC power supply, 232 inverter circuit, 23
4,244 bandpass filter, 236,246 motor, INV1, INV2 inverter circuit, MG1,
MG2 motor, T11 to T16, T21 to T26 transistor, D11 to D16, D21 to D26 diode, EG engine, PG planetary gear.

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Junwa Shamoto 1 Toyota Town, Toyota City, Aichi Prefecture Inside Toyota Motor Corporation (72) Inventor Masayuki Komatsu 1 Toyota Town, Toyota City, Aichi Prefecture Toyota Motor Corporation (72) Inventor Moriya Kazunari Morita 41, Nagakute-cho, Aichi-gun, Aichi-gun, 41-Cho, Yokomichi, Toyota-Chuo R & D Co., Ltd. No. 1 Toyota Central Research Laboratory Co., Ltd. (72) Inventor Yukio Inakuma 41-cho, Yokomichi, Oku-cho, Nagakute-cho, Aichi-gun Aichi Prefecture F-term in Toyota Central Research Laboratory Co., Ltd. 5H115 PA11 PC06 PG04 PI16 PI21 PU10 PU24 PU25 PV03 PV09 PV23 QI04 QN03 QN05 QN09 RB11 RB22 SE04 TO13 TR14 TU04 5H572 AA02 BB02 CC01 DD05 EE10 GG04 GG05 HA10 HB09 HC07 JJ03 JJ17 JJ26 L L22 LL24 LL32

Claims (19)

[Claims] A first motor that is rotationally driven by a polyphase alternating current; a first inverter circuit that can supply polyphase alternating current power to the first electric motor by a switching operation of a plurality of switching elements; A first power supply means connected to one of the positive bus and the negative bus of the inverter circuit and the neutral point of the first electric motor; A second motor capable of supplying polyphase AC power to the second motor by switching operation of a plurality of switching elements, wherein a positive bus and a negative bus are connected to a positive bus and a negative bus of the first inverter circuit; A power output device comprising: an inverter circuit; and a chargeable / dischargeable power storage unit connected to a positive bus and a negative bus of the first inverter circuit. 2. The power output apparatus according to claim 1, further comprising: first drive / storage control means for controlling the drive of the first electric motor and controlling the state of charge of the power storage means. 3. The plurality of first inverter circuits of the first inverter circuit for adjusting the polyphase alternating current applied to the first electric motor and adjusting charging and discharging of the storage means. 3. The power output device according to claim 2, wherein said power output device is means for controlling switching of said switching element. 4. The first drive power storage control means, wherein a polyphase alternating current capable of outputting a target power from the first motor is applied to the first motor and a voltage between terminals of the power storage means is adjusted. 4. The power output device according to claim 2, wherein the power output device is means for controlling switching of the plurality of switching elements of the first inverter circuit so as to reach a target voltage. 5. A power supply unit connected to one of a positive bus and a negative bus of the second inverter circuit and a neutral point of the second motor. 5. The power output device according to any one of 1 to 4. 6. The power output apparatus according to claim 5, further comprising a second drive / storage control unit that controls the drive of the second electric motor and controls the state of charge of the power storage unit. 7. The second drive power storage control means adjusts the polyphase alternating current applied to the second electric motor and adjusts the charge and discharge of the power storage means. 7. The power output device according to claim 6, wherein said power output device is means for controlling switching of said switching element. 8. The second drive power storage control means applies a polyphase alternating current capable of outputting a target power from the second motor to the second motor and adjusts a voltage between terminals of the power storage means. 8. The power output device according to claim 6, wherein the power output device is means for controlling switching of the plurality of switching elements of the second inverter circuit so as to reach a target voltage. 9. A first motor rotatably driven by a polyphase alternating current, a first inverter circuit capable of supplying polyphase alternating current power to the first electric motor by a switching operation of a plurality of switching elements, A first power supply means connected to one of the positive bus and the negative bus of the inverter circuit and the neutral point of the first electric motor; A second motor capable of supplying polyphase AC power to the second motor by switching operation of a plurality of switching elements, wherein a positive bus and a negative bus are connected to a positive bus and a negative bus of the first inverter circuit; An inverter circuit; the other of the positive and negative buses of the first inverter circuit, to which the first power supply unit is not connected; and the first motor Power output apparatus comprising a first storage means for charging and discharging, which is connected to the neutral point. 10. The power output apparatus according to claim 9, further comprising: first drive power storage control means for controlling the driving of the first electric motor and controlling the power storage state of the first power storage means. 11. The first inverter circuit so as to adjust the polyphase alternating current applied to the first electric motor and adjust charging and discharging of the first power storage unit. 11. The power output device according to claim 10, wherein the power output device is means for controlling switching of the plurality of switching elements. 12. The first drive power storage control means, wherein a polyphase AC capable of outputting target power from the first motor is applied to the first motor and a terminal of the first power storage means. The power output device according to claim 10 or 11, wherein the power output device is means for controlling switching of the plurality of switching elements of the first inverter circuit so that an inter-voltage becomes a target voltage. 13. The power output apparatus according to claim 9, wherein one of a positive bus and a negative bus of the second inverter circuit and a neutral of the second electric motor. A second power supply means connected to a point; a second bus of the positive and negative buses of the second inverter circuit, to which the second power supply means is not connected; and the second motor And a second chargeable and dischargeable power storage unit connected to a neutral point of the power output device. 14. The power output apparatus according to claim 13, further comprising a second drive / storage control unit that controls the drive of the second electric motor and controls the state of charge of the second power storage unit. 15. The second inverter circuit so as to adjust the polyphase alternating current applied to the second electric motor and adjust charging / discharging of the second power storage means. The power output device according to claim 14, wherein the power output device is means for controlling switching of the plurality of switching elements. 16. The second drive power storage control means, wherein a polyphase alternating current capable of outputting target power from the second motor is applied to the second motor and a terminal of the second power storage means. The power output device according to claim 14 or 15, wherein the power output device is means for controlling switching of the plurality of switching elements of the second inverter circuit so that an inter-voltage becomes a target voltage. 17. The power output device according to claim 9, further comprising a chargeable / dischargeable third power storage unit connected to a positive electrode bus and a negative electrode bus of the first inverter circuit. 18. The power output device according to claim 1, wherein the first electric motor and / or the second electric motor are:
A generator motor capable of generating electric power by inputting power, wherein the first power supply means is a chargeable / dischargeable means, and drives and drives the first motor and / or the second motor as a generator. A first controlling a switching of a switching element of the first inverter circuit and / or a switching element of the second inverter circuit so as to charge the first power supply means using electric power generated by a motor driven as a generator; Power output device comprising the charging control means. 19. The power output apparatus according to claim 18, wherein the second power supply means is a chargeable / dischargeable means, and wherein the first power supply means is a chargeable / dischargeable means. And / or the first inverter circuit so that the second power supply means is charged by using the electric power generated by the electric motor and / or the second electric motor as a generator and the electric motor driven as the generator. And / or a power output device comprising second charging control means for controlling switching of a switching element of the second inverter circuit.