Drive circuit for motor/generator
AssigneeNissan Motor Co., Ltd.
InventorsMinoru Arimitsu, Masaki Nakano, Yuusuke Minagawa, Koji Takahashi
Life of this patent
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Abstract
A drive circuit for a motor/generator, having a first rotating electrical machine which is mainly used as a motor and a second rotating electrical machine which is mainly used as a generator, is characterized in that a booster circuit is disposed at a position where the current for rotating the first rotating electrical motor cancels out with the current generated by the second rotating electrical machine. In this manner, the booster circuit comprising small capacity elements can be used in the drive circuit for the motor/generator.
Claims10
A drive circuit for a motor/generator, having an inverter and a direct current power source supplying electrical power to the inverter, the motor/generator being driven by the inverter and having a first rotating electrical machine which mainly functions as a motor and a second rotating electrical machine which mainly functions as a generator, the drive circuit comprising:
- a booster circuit for boosting a voltage of the direct current power source, the booster circuit comprising a first switching power device connected to a plus side of the direct current power source, a second switching power device connected between a minus side of the direct current power source and the first switching power device, a diode connected through an anti-parallel connection to the first and second switching power devices, and a condenser connected to both ends of the first and second power devices, wherein the booster circuit is disposed at a position where a current for rotating the first rotating electrical motor cancels out with a current generated by the second rotating electrical machine.
A drive circuit for a motor/generator, having an inverter and a direct current power source supplying electrical power to the inverter, the motor/generator being driven by the inverter and having a first rotating electrical machine which mainly functions as a motor and a second rotating electrical machine which mainly functions as a generator, the drive circuit comprising:
- a sensor for detecting a direct current voltage applied to the inverter;
- a booster circuit for boosting a voltage of the direct current power source, comprising a first switching power device connected to a plus side of the direct current power source, a second switching power device connected between a minus side of the direct current power source and the first switching power device, diodes each connected through an anti-parallel connection to each switching power device, and a condenser connected to both ends of the two power devices, wherein the booster circuit is disposed at a position where a current for rotating the first rotating electrical motor cancels out with a current generated by the second rotating electrical machine;
- and
- a microprocessor which controls the operation of the booster circuit, wherein the microprocessor is programmed to only operate the first switching power device and prohibit the second switching power device from operating, when the direct current voltage applied to the inverter is higher than a required direct current voltage.
A drive circuit for a motor/generator, having an inverter and a direct current power source supplying electrical power to the inverter, the motor/generator being driven by the inverter and having a first rotating electrical machine which mainly functions as a motor and a second rotating electrical machine which mainly functions as a generator, the drive circuit comprising:
- a sensor for detecting a direct current voltage applied to the inverter;
- a booster circuit for boosting a voltage of the direct current power source, comprising a first switching power device connected to a plus side of the direct current power source, a second switching power device connected between a minus side of the direct current power source and the first switching power device, diodes each connected through an anti-parallel connection to each switching power device, and a condenser connected to both ends of the two power devices, wherein the booster circuit is disposed at a position where a current for rotating the first rotating electrical motor cancels out with a current generated by the second rotating electrical machine;
- and
- a microprocessor which controls the operation of the booster circuit, wherein the microprocessor is programmed to only operate the second switching power device and prohibit the first switching power device from operating, when the direct current voltage applied to the inverter is lower than a required direct current voltage.
Dependencies are inferred from the claim text.