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:
May. 05, 2015
Filed:
Dec. 17, 2012
Applicant:
Control Techniques Ltd, Newton, GB;
Inventor:
Colin Hargis, Oswestry, GB;
Assignee:
Control Techniques Ltd, Newtown, GB;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02P 6/14 (2006.01); H02P 27/06 (2006.01); H02P 27/08 (2006.01);
U.S. Cl.
CPC ...
H02P 27/06 (2013.01); H02P 2201/00 (2013.01); H02P 27/08 (2013.01); H02P 2205/05 (2013.01);
Abstract
A drive system for an electrical load such as an electric motor or generator comprises a PWM converter and a controller therefore. A signal indicative of a condition of the converter outpost is used in a controller to drive an optimal value of PWM switching frequency based on a load characteristic that is used to control the pulse switching frequency. The system takes account of the overall system in deriving an efficient PWM switching frequency.