Title:
DRIVE CONTROL DEVICE FOR BRUSHLESS MOTOR
Document Type and Number:
Japanese Patent JP3556137
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To obtain a drive control device which reduces torque ripples caused by a commutation and by which the noise level and the vibration of a motor are lowered.
SOLUTION: In order to perform feedback control operation by using a noncommutative current as a target current, a first duty factor as a PWM control output to a corresponding switching element Q is computed. A second duty factor used to PWM-control a terminal voltage at a phase, at which a commutation current becomes 0 as required, is computed and output in such a way that this drive control circuit is operated in a region, in which the first duty factor is at a prescribed value or smaller during a commutation period.
Inventors:
Hiroaki Yamamoto
Application Number:
JP31791699A
Publication Date:
August 18, 2004
Filing Date:
November 09, 1999
Export Citation:
Assignee:
Mitsubishi Electric Corporation
International Classes:
H02P6/10; H02P6/06; H02P6/08; H02P6/28; H02P7/00; H02P29/00; (IPC1-7): H02P6/10; H02P7/00
Domestic Patent References:
| JP59041187A | ||||
| JP11206171A | ||||
| JP11028000A | ||||
| JP11509080A |
Attorney, Agent or Firm:
Keigo Murakami
Masuo Oiwa
Toshihide Kodama
Takenaka Ikuo
Masuo Oiwa
Toshihide Kodama
Takenaka Ikuo
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