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:
Dec. 28, 1999
Filed:
Dec. 11, 1998
Applicant:
Inventor:
David Mark Sugden, Leeds, GB;
Assignee:
Switched Reluctance Drives Limited, Harrogate, GB;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H02P / ;
U.S. Cl.
CPC ...
318701 ; 318439 ;
Abstract
A commutation controller for a switched reluctance machine has separate timer circuits for determining the firing signals for motoring and generating modes. Each timer circuit comprises a ramp generator and a pair of comparators which denote the ON- and OFF-angle as the ramp output passes preset thresholds applied to the comparators. A multiplexer selects the output from one of the motoring and generating timers according to the mode of machine operation. By producing timing signals for the motoring and generating modes separately and continuously, a transition between motoring and generating modes can be carried out smoothly without timing error.