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:
Oct. 16, 2012
Filed:
Feb. 08, 2007
Hiroyuki Yoshimura, Yokohama, JP;
Hiroyuki Yoshimura, Yokohama, JP;
Fuji Electric Co., Ltd., Kawasaki-Shi, JP;
Abstract
Power electronics equipment includes a switching device directing current flow to a load and interrupting the current flowing to the load, a control circuit generating a control signal directing the conduction and non-conduction of the switching device, a driver circuit driving a control terminal of the switching device based on the control signal, and at least one air-cored insulating transformer insulating the control circuit and the driver circuit from each other. Each air-cored insulating transformer includes a primary winding and a secondary winding configured to generate a voltage by a change of interlinkage of a magnetic field. The secondary winding includes a plurality of coils configured such that voltages generated by external magnetic flux intersecting the secondary winding are canceled and a voltage generated by the signal magnetic flux intersecting the secondary winding is increased.