Title:
モータ制御装置及びモータの絶縁劣化検出方法
Document Type and Number:
Japanese Patent JP5065192
Kind Code:
B2
Abstract:
A motor control system of the present invention includes an accurate electrical insulation deterioration detecting system. A voltage divider circuit is arranged between a negative DC output portion and a ground, through a normally open switch circuit. A detecting operation control section closes the normally open switch while a circuit breaker is opened, and places at least one of transistors electrically connected to a positive DC output portion into a conductive state, from among six transistors included in three arm circuits. A voltage across the first resistor is inputted as a divided voltage into a voltage comparator of a voltage comparison section. The voltage comparison section compares a divided voltage outputted from the voltage divider circuit and a reference voltage using the voltage comparator and outputs an alarm signal if the divided voltage exceeds the reference voltage.
Inventors:
Yuji Ide
Application Number:
JP2008191211A
Publication Date:
October 31, 2012
Filing Date:
July 24, 2008
Export Citation:
Assignee:
Sanyo Electric Co., Ltd.
International Classes:
G01R31/34; H02K11/00; H02P5/74; H02P27/06
Domestic Patent References:
| JP2007252098A | ||||
| JP11122702A | ||||
| JP2007327856A |
Attorney, Agent or Firm:
西浦 ▲嗣▼晴