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:
Jan. 13, 2004
Filed:
Aug. 15, 2002
Applicant:
Inventors:
Andrew Ferencz, Southborough, MA (US);
Gregory A. Zvonar, Winchester, MA (US);
William Ng, Leominister, MA (US);
Bernhard Schroter, Upton, MA (US);
Assignee:
Galaxy Power, Inc., Westborough, MA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H02H 7/122 ;
U.S. Cl.
CPC ...
H02H 7/122 ;
Abstract
The invention replaces a snubber resistor with a two diodes and a load. The electric charge stored in the snubber capacitor on each cycle of the switch is then caused by a first diode to flow through the load, rather than to flow through a snubber resistor. A second diode provides a charging path for the snubber capacitor. The load uses the electric power which would be wasted in the snubber resistor.