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. 07, 1982
Filed:
Jun. 09, 1980
Applicant:
Inventor:
Thomas A Radomski, Utica, MI (US);
Assignee:
General Motors Corporation, Detroit, MI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02H / ;
U.S. Cl.
CPC ...
361 91 ; 361 88 ; 361111 ; 363 20 ; 363124 ; 307253 ; 307240 ;
Abstract
A circuit for protecting the transistor of a high current transistor chopper from damage due to inductive energy stored in the chopper circuit when the transistor is biased nonconductive. The inductive energy charges a capacitor connected in parallel with the transistor, and a return circuit returns the energy stored in the capacitor to the source while the transistor is nonconductive and to the load when the transistor is subsequently biased conductive.