Invention Grant
US08305020B2 Electric power conversion device, compressor motor with the device, and air conditioner with the motor
失效
电力转换装置，具有该装置的压缩机电动机，以及具有电动机的空调
- Patent Title: Electric power conversion device, compressor motor with the device, and air conditioner with the motor
- Patent Title (中): 电力转换装置，具有该装置的压缩机电动机，以及具有电动机的空调
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Application No.: US12388762Application Date: 2009-02-19
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Publication No.: US08305020B2Publication Date: 2012-11-06
- Inventor: Takahiro Suzuki , Yasuo Notohara , Kiyoshi Sakamoto
- Applicant: Takahiro Suzuki , Yasuo Notohara , Kiyoshi Sakamoto
- Applicant Address: JP Tokyo JP Tokyo
- Assignee: Hitachi, Ltd.,Hitachi Industrial Equipment Systems Co., Ltd.
- Current Assignee: Hitachi, Ltd.,Hitachi Industrial Equipment Systems Co., Ltd.
- Current Assignee Address: JP Tokyo JP Tokyo
- Agency: Antonelli, Terry, Stout & Kraus, LLP.
- Priority: JP2008-168039 20080627
- Main IPC: H02H7/08
- IPC: H02H7/08
Abstract:
The device is provided with an electric power conversion circuit including switching elements for converting a DC electric power to an AC electric power, a load connected to an output side of the electric power conversion circuit, means for detecting a current flowing through a DC side in the electric power conversion circuit, a voltage command value preparing means for controlling the operation of the switching elements in the electric power conversion circuit and a wire breaking detecting means. The wire breaking detection means judges a wire breaking in the load or an abnormality of any of the switching elements in the electric power conversion circuit by making use of a DC current detection value in a period when a current of maximum voltage phase or of voltage minimum phase of the electric power conversion circuit is flowing in a DC current.
Public/Granted literature
- US20090323232A1 ELECTRIC POWER CONVERSION DEVICE, COMPRESSOR MOTOR WITH THE DEVICE, AND AIR CONDITIONER WITH THE MOTOR Public/Granted day:2009-12-31
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