Power output device
First Claim
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1. A power output device, comprising:
- a motor designed to be driven to rotate using multiple phase AC power;
an inverter circuit supplying multiple phase AC power to the motor while switching a plurality of switching elements;
a first power source connected to a positive bus bar and a negative bus bar of the inverter circuit;
a second power source connected to the positive bus bar or the negative bus bar of the inverter circuit and to a neutral point of the motor; and
a controller for controlling switching of the plurality of switching elements of the inverter circuit such that a ratio between positive and negative voltages relative to a potential at the neutral point of the motor, concerning respective phases of the multiple phase AC power to be supplied to the motor, become a predetermined ratio based on a voltage of the first power source and a voltage of the second power source.
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Abstract
When the absolute values of the negative voltage V− and the positive voltage V+ of a rectangular wave to be applied to the three phase coils of the motor driven using a rectangular-waved voltage are different, time T1 and time T2 for the rectangular wave are adjusted such that the area A representing the absolute value of a time integration value of the negative voltage V− and the area B representing the absolute value of a time integration value of the positive voltage V+ becomes equal to each other. With this adjustment, the average voltage of the rectangular wave becomes of value 0, so that a DC component current is prevented from flowing into the three phase coils of the motor.
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Citations
20 Claims
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1. A power output device, comprising:
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a motor designed to be driven to rotate using multiple phase AC power;
an inverter circuit supplying multiple phase AC power to the motor while switching a plurality of switching elements;
a first power source connected to a positive bus bar and a negative bus bar of the inverter circuit;
a second power source connected to the positive bus bar or the negative bus bar of the inverter circuit and to a neutral point of the motor; and
a controller for controlling switching of the plurality of switching elements of the inverter circuit such that a ratio between positive and negative voltages relative to a potential at the neutral point of the motor, concerning respective phases of the multiple phase AC power to be supplied to the motor, become a predetermined ratio based on a voltage of the first power source and a voltage of the second power source. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
the motor is a generator motor capable of generation in response to power input thereto, at least one of the first power source or the second power source is a rechargeable and dischargeable power source, and the power output device comprises a charge controller for driving the motor so as to operate as a power generator, and controlling switching of the plurality of switching elements of the inverter circuit so that the at least one of the first power source or the second power source are charged using power generated by the motor.
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10. A power output device, comprising:
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a motor designed to be driven to rotate using multiple phase AC power;
an inverter circuit supplying multiple phase AC power to the motor while switching a plurality of switching elements;
a first power source connected to a positive bus bar of the inverter circuit and to a neutral point of the motor;
a second power source connected to the negative bus bar of the inverter circuit and to a neutral point of the motor; and
a controller for controlling switching of the plurality of switching elements of the inverter circuit such that a ratio between positive and negative voltages relative to a potential at the neutral point of the motor, concerning respective phases of the multiple phase AC power to be supplied to the motor, become a predetermined ratio based on a voltage of the first power source and a voltage of the second power source. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
the motor is a generator motor capable of power generation in response to power input thereto, at least one of the first power source or the second power source is a rechargeable and dischargeable power source, and the power output device comprises a charge controller for controlling switching of the plurality of switching elements of the inverter circuit so that the motor is driven to operate as a generator, and that the at least one of the first power source of the second power source are charged using power generated by the motor.
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Specification