Invention Grant
- Patent Title: Apparatus and method for driving an induction motor
- Patent Title (中): 用于驱动感应电动机的装置和方法
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Application No.: US11764820Application Date: 2007-06-19
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Publication No.: US07906933B2Publication Date: 2011-03-15
- Inventor: Daisuke Tan , Hirohisa Satomi , Shigetoshi Okamatsu , Koichi Miyazaki
- Applicant: Daisuke Tan , Hirohisa Satomi , Shigetoshi Okamatsu , Koichi Miyazaki
- Applicant Address: JP Tokyo
- Assignee: Hitachi, Ltd.
- Current Assignee: Hitachi, Ltd.
- Current Assignee Address: JP Tokyo
- Agency: Antonelli, Terry, Stout & Kraus, LLP.
- Priority: JP2006-172531 20060622
- Main IPC: H02P27/04
- IPC: H02P27/04

Abstract:
An induction motor drive includes a plurality of inverters, a changeover switch which changes over outputs of the plurality of inverters to be supplied to one induction motor and a changeover controller which controls the changeover switch on the basis of a failure detection signal of one inverter to change over from the one inverter to another inverter to start the other inverter so that the induction motor is driven. The changeover controller includes a frequency/phase detector which always detects a frequency and a phase of a terminal voltage of the induction motor and a starting frequency/phase setting device which controls a frequency and a phase at starting of the other inverter in accordance with detected values of the frequency/phase detector when the failure signal is inputted.
Public/Granted literature
- US20080007196A1 APPARATUS AND METHOD FOR DRIVING AN INDUCTION MOTOR Public/Granted day:2008-01-10
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