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:
Sep. 12, 2017
Filed:
Mar. 03, 2014
Applicant:
Control Techniques Limited, Newtown, GB;
Inventor:
Frank Weiner Heerdt, Montgomery, GB;
Assignee:
NIDEC CONTROL TECHNIQUES LIMITED, Newtown, GB;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H02M 1/12 (2006.01); H02M 7/49 (2007.01); H02M 5/458 (2006.01); H02M 7/487 (2007.01);
U.S. Cl.
CPC ...
H02M 7/49 (2013.01); H02M 5/458 (2013.01); H02M 7/487 (2013.01); Y10T 307/696 (2015.04);
Abstract
A circuit for an electrical load comprises a passive transformer, the secondary of which is connected to power cells for each phase according to the transformer tappings. Each power cell comprises a low cost but efficient power factor correction circuit to produce lower harmonics on the transformer.