The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 23, 1994
Filed:
Jul. 23, 1992
Applicant:
Inventors:
Hiroyuki Inoue, Yawata, JP;
Mikio Hasegawa, Neyagawa, JP;
Assignee:
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02M / ;
U.S. Cl.
CPC ...
363 98 ; 363 41 ; 363132 ; 318811 ;
Abstract
A current detecting method in a case of effecting the digital current control of a motor by a PWM switching system, wherein the current feedback control time and the PWM period are synchronized, and the current for each of the current taking in PWM periods at a time established with respect to the reference signal for determining the PWM period is detected, so that the influence of the pulsation of the current by the PWM switching system may be reduced, and the performance improvement in the digital current feedback control may be improved.