Title:
多相電動機の制御装置
Document Type and Number:
Japanese Patent JP4884355
Kind Code:
B2
Abstract:
Provided is a controller of a multi-phase electric motor capable of accurately detecting the current value of each phase for every control period using single current detection means, and preventing the generation of noise arising from a current ripple by switching based on a PWM signal. A controller (1) of a multi-phase electric motor (7) according to the present invention includes drive means (6), including a pair of an upper arm switching element (Q1 to Q3) and a lower arm switching element (Q4 to Q6), for driving the multi-phase electric motor (7); single current detection means (8) for detecting a current value of the multi-phase electric motor (7); PWM signal generation means (2) for generating a plurality of PWM signals of each phase within one control period based on the current value detected by the current detection means (8) and a carrier signal; and phase movement means (5) for moving a phase by a predetermined amount such that frequency in change of the PWM signal of the predetermined phase generated by the PWM signal generation means (2) is included in a non-audible range, and outputting the resultant phase of the PWM signal to the drive means (6); wherein the phase movement means (5) moves the phase by a predetermined amount for all the PWM signals of the predetermined phase within one control period.
Inventors:
Hamasaki Mitsumitsu
Application Number:
JP2007304090A
Publication Date:
February 29, 2012
Filing Date:
November 26, 2007
Export Citation:
Assignee:
OMRON Automotive Electronics Co., Ltd.
International Classes:
H02P6/06; H02M1/00; H02P6/08
Domestic Patent References:
| JP2002291284A | ||||
| JP63073898A |
Attorney, Agent or Firm:
Hideyuki Okumura