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:
Aug. 01, 2006
Filed:
Feb. 14, 2002
Takahiro Kudo, Kanagawa, JP;
Yujiro Kitaide, Kanagawa, JP;
Kimitada Ishikawa, Saitama, JP;
Fuji Electric Co., Ltd., Kawasaki, JP;
Abstract
In an overload current protection device for cutting off power from a power supply to a load () such as a motor by means of a contactor (switch) () at overloading, an MI element having a magnetic impedance (MI) effect as current detectors (, and) is installed at a position capable of detecting a current flowing through the secondary winding of power supply transformers (, and) that generate a control power supply to thereby reduce costs without using a constant voltage power supply and expand a current detection range by eliminating magnetic saturation due to a core, a problem with a conventional current transformer, thereby providing at low costs a high-precision overload current protection device having a wide current detection range.