Devices and methods for controlling current in inverters
AssigneeToshiba Mitsubishi-Electric Industrial Systems Corporation
InventorsYuji Matsuoka, Tsuguhiro Tanaka, Paul Bixel, Tatsuaki Ambo
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Abstract
An inverter controller is configured to control inverters connected in parallel. The inverter controller is configured to closes switch of a first inverter and turn on a first switching element provided at the first inverter to charge capacitors of the inverters at the time of starting the inverters, and to close the other switches after the capacitors are charged.
Claims10
An inverter controller configured to control inverters being provided with capacitors and first switches on DC sides, respectively, the DC sides of the inverters being connected in parallel AC sides of the inverters being connected in parallel, comprising:
- a first start-time controller configured to perform first start-time control of closing the first switch of a first inverter of the inverters and turning on at least a first switching element provided at the first inverter to charge the respective capacitors of the inverters at the time of starting the inverters;
- and
- a second start-time controller configured to perform second start-time control of closing the respective first switches of the other inverters after the respective capacitors of the inverters are charged by the first start-time control by the first start-time controller.
An inverter control method of controlling inverters being provided with capacitors and first switches on DC sides, respectively, the DC sides of the inverters being connected in parallel, AC sides of the inverters being connected in parallel, comprising:
- performing first start-time control of closing the first switch of a first inverter of the inverters and turning on at least a first switching element provided at the first inverter to charge the respective capacitors of the inverters at the time of starting the inverters;
- and
- performing second start-time control of closing the respective first switches of the other inverters after the respective capacitors of the inverters are charged by the first start-time control.
A power supply system, comprising:
- a power supply configured to output direct-current power;
- inverters configured to convert direct-current power output from the power supply into alternating-current power, the inverters being provided with capacitors and first switches on DC sides, respectively, the DC sides of the inverters being connected in parallel, AC sides of the inverters being connected in parallel;
- a first start-time controller configured to perform first start-time control of closing the first switch of a first inverter of the inverters and turning on at least a first switching element provided at the first inverter to charge the respective capacitors of the inverters at the time of starting the inverters;
- and
- a second start-time controller configured to perform second start-time control of closing the respective first switches of the other inverters after the respective capacitors of the inverters are charged by the first start-time control by the first start-time controller.
Dependencies are inferred from the claim text.