Title:
【発明の名称】交流電動機の可変速制御装置
Document Type and Number:
Japanese Patent JP3111898
Kind Code:
B2
Abstract:
To provide a trans-vector controller for an alternating current ("AC") motor that facilitates operating the secondary resistance of the AC motor without experimentally rotating the AC motor. In a preferred embodiment, the variable speed control circuit, including a secondary resistance value generating device, changes the direct current ("DC") exciting current and operates the secondary resistance of an induction motor by superimposing an AC signal with small amplitude outputted from a AC signal generator onto a reference current value immediately before the start of the induction motor in the state of DC excitation.
Inventors:
Koichi Tajima
Hidetoshi Kaita
Yuji Tetsutani
Hidetoshi Kaita
Yuji Tetsutani
Application Number:
JP14684696A
Publication Date:
November 27, 2000
Filing Date:
June 10, 1996
Export Citation:
Assignee:
Fuji Electric Co., Ltd.
International Classes:
H02P21/00; H02P21/08; H02P21/14; G01R31/34; H02P21/22; H02P21/34; H02P23/07; H02P23/16; H02P27/04; H02P27/08; (IPC1-7): H02P21/00; G01R31/34
Domestic Patent References:
| JP6110983A | ||||
| JP6192185A | ||||
| JP6416283A | ||||
| JP1308187A | ||||
| JP6273496A | ||||
| JP755899A |
Attorney, Agent or Firm:
Masaharu Shinobe