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:
Nov. 07, 2000
Filed:
Mar. 25, 1999
Applicant:
Inventors:
Harold C Scott, Boulder, CO (US);
Rod K Shelden, Boulder, CO (US);
Assignee:
Coleman Powermate, Inc., Kearney, NE (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
H02P / ;
U.S. Cl.
CPC ...
322 25 ; 322 46 ;
Abstract
An improved three-phase bridge inverter DC link converter power circuit for a portable generator, preferably the generator system described in U.S. Pat. No. 5,625,276 to Scott et al. Dual voltage and variable frequency inverter designs and improved converter designs are disclosed. Embodiments of the present invention avoid a capacitor induced center voltage drift problem found in certain prior art inverter designs.