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. 14, 2004
Filed:
Jul. 03, 2002
John S. Hsu, Oak Ridge, TN (US);
Gui-Jia Su, Knoxville, TN (US);
Donald J. Adams, Knoxville, TN (US);
James M. Nagashima, Cerritos, CA (US);
Constantin Stancu, Anaheim, CA (US);
Douglas S. Carlson, Hawthorne, CA (US);
Gregory S. Smith, Woodland Hills, CA (US);
Other;
Abstract
A method for providing additional dc inputs or outputs ( ) from a dc-to-ac inverter ( ) for controlling motor loads ( ) comprises deriving zero-sequence components (V , V , and V ) from the inverter ( ) through additional circuit branches with power switching devices ( ), transforming the voltage between a high voltage and a low voltage using a transformer or motor ( ), converting the low voltage between ac and dc using a rectifier ( ) or an H-bridge ( ), and providing at least one low voltage dc input or output ( ). The transformation of the ac voltage may be either single phase or three phase. Where less than a 100% duty cycle is acceptable, a two-phase modulation of the switching signals controlling the inverter ( ) reduces switching losses in the inverter ( ). A plurality of circuits for carrying out the invention are also disclosed.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile