Title:
電動機制御装置および制御逸脱検出方法
Document Type and Number:
Japanese Patent JP4797316
Kind Code:
B2
Abstract:
A problem to be solved by the present invention is to provide a motor controller capable of enhancing the safety of a crane, or the like, by accurately detecting a control deviant state within a short period of time by means of simple computation using the amount of control of a motor. According to the present invention, a voltage and a current of an AC motor are controlled by subjecting the voltage and current to coordinate transformation along two axes "d" and "q," and detects occurrence of a control deviant state from "d" and "q" components of the voltage or current. A control deviant state is determined to have arisen when a value-which is computed on the basis of θi=tan<-1>(Iq/Id) through use of an excitation current feedback value Id which is the "d" component of the electric current and the torque current feedback value Iq which is the q component-has attained a predetermined value or more.
Inventors:
Yoichi Yamamoto
Application Number:
JP2003033742A
Publication Date:
October 19, 2011
Filing Date:
February 12, 2003
Export Citation:
Assignee:
Yaskawa Electric Co., Ltd.
International Classes:
H02P27/06; H02P1/00; H02P21/00; H02P21/06; H02P21/18; H02P21/24; H02P21/26; H02P23/07; H02P23/08; H02P23/16; H02P27/04; H02P
Domestic Patent References:
| JP2002125400A | ||||
| JP11004599A | ||||
| JP2001339999A | ||||
| JP3212191A |
Attorney, Agent or Firm:
Shohei Oguri
Hironori Honda
Toshimitsu Ichikawa
Hironori Honda
Toshimitsu Ichikawa
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