Title:
CONTROLLING DEVICE FOR PERMANENT-MAGNET TYPE SYNCHRONOUS ELECTRIC MOTOR
Document Type and Number:
Japanese Patent JP3678558
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To prevent the voltage distortion of arm short-circuiting prevention time from being generated, when a permanent magnet-type synchronous electric motor is subjected to PWM control.
SOLUTION: A coordinate conversion means 22 inputs an output current 6a of an inverter and angle data 8a of an electric motor and outputs a torque current feedback value 22b and a reactive (excitation) current feedback value 22a. The torque current feedback value 22b is compared with a torque current command value iq* for controlling, and the reactive current feedback value 22a is compared with a reactive current command value id* for controlling. At this time, the reactive current command value id* is set to a specific value Kid, the output current of the inverter is set to a value other than zero, and a phase voltage is maintained at a stable potential.
Inventors:
Tetsuya Nishio
Satoshi Kato
Hiroshi Araki
Satoshi Kato
Hiroshi Araki
Application Number:
JP29085597A
Publication Date:
August 03, 2005
Filing Date:
October 23, 1997
Export Citation:
Assignee:
Mitsubishi Electric Corporation
International Classes:
H02P21/00; H02P21/02; H02P21/05; H02P21/22; H02P23/02; H02P23/04; H02P23/16; H02P23/26; H02P27/04; H02P27/08; (IPC1-7): H02P21/00
Domestic Patent References:
| JP9215102A | ||||
| JP9271198A | ||||
| JP63299793A |
Attorney, Agent or Firm:
Mamoru Takada