Title:
AC MOTOR CONTROLLER
Document Type and Number:
WIPO Patent Application WO/2006/112033
Kind Code:
A1
Abstract:
There is provided a motor controller in which abnormal state of a motor cable during driving of an AC motor can be detected by a processing unit without using an extra circuit. The motor controller comprises an AC motor, an inverter for driving the AC motor with a motor current through a motor cable, and a motor current detector for detecting a motor current flowing through the motor cable of the AC motor. The motor controller detects abnormality such as short circuit or disconnection of the motor cable from the motor current detected by the motor current detector by using the processing unit.
Inventors:
MATSUI HIROKAZU (JP)
SAWADA TAKEFUMI (JP)
YOSHIHARA SHIGEYUKI (JP)
SAWADA TAKEFUMI (JP)
YOSHIHARA SHIGEYUKI (JP)
Application Number:
PCT/JP2005/007667
Publication Date:
October 26, 2006
Filing Date:
April 15, 2005
Export Citation:
Assignee:
HITACHI LTD (JP)
MATSUI HIROKAZU (JP)
SAWADA TAKEFUMI (JP)
YOSHIHARA SHIGEYUKI (JP)
MATSUI HIROKAZU (JP)
SAWADA TAKEFUMI (JP)
YOSHIHARA SHIGEYUKI (JP)
International Classes:
H02P5/00
Foreign References:
| JP2004320945A | 2004-11-11 | |||
| JP2004106664A | 2004-04-08 | |||
| JP2005057818A | 2005-03-03 | |||
| JPH0666901A | 1994-03-11 | |||
| JPH10191551A | 1998-07-21 |
Other References:
See also references of EP 1876700A4
Attorney, Agent or Firm:
Inoue, Manabu c/o HITACHI LTD. (6-1, Marunouchi 1-chom, Chiyoda-ku Tokyo, JP)
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