Electricity: motive power systems – Induction motor systems – Primary circuit control
Reexamination Certificate
2006-10-19
2011-10-25
Ro, Bentsu (Department: 2837)
Electricity: motive power systems
Induction motor systems
Primary circuit control
C318S811000, C318S802000, C318S803000
Reexamination Certificate
active
08044632
ABSTRACT:
A power conversion device includes a converter that converts AC power to DC power, a converter controller that controls an output voltage of the converter, an inverter that converts the DC power to AC power at a variable frequency, an inverter controller that controls an output frequency of the inverter, and a current detector that detects an AC current on an input side of the converter. It is configured in such a manner that the inverter controller adjusts a slip frequency of the induction motor in response to a fluctuation of the AC current on the input side of the converter detected by the current detector. It thus becomes possible to suppress a beat current in an output current of the inverter at the occurrence of a load fluctuation as well as a power supply voltage fluctuation.
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Office Action dated Sep. 14, 2010, issued in the corresponding Chinese Patent Application No. 200680056088.2.
Hatanaka Keita
Ito Daisuke
Kikuchi Takahiro
Obi Hideo
Tanaka Takeshi
Buchanan & Ingersoll & Rooney PC
Carrasquillo Jorge
Mitsubishi Electric Corporation
Ro Bentsu
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