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:
Sep. 24, 2002
Filed:
Apr. 06, 2001
Applicant:
Inventor:
Jake Chen, Taipei, TW;
Assignee:
Allis Electric Co., Ltd., Taipei, TW;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02M 1/12 ; H02M 7/537 ;
U.S. Cl.
CPC ...
H02M 1/12 ; H02M 7/537 ;
Abstract
A method for PWM frequency correlation of the present invention is disclosed. In that, 2×M PWM signals G -Gn are supplied to control ends (gates) of the switch elements (such as MOSFET) Q -Qn of the D. C. boost circuit, where M is a prime number larger than 1, and the PWM signals G G G Gn−1 are synchronous, and have a phase difference of 180 degrees/M, and the PWM signals G G G Gn are synchronous, and have a phase difference of 180 degrees/M. by this design, a ripple current and EMI interference to the battery as the PWM signal is switched are reduced.