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:
Jun. 02, 2015
Filed:
Apr. 03, 2012
Yasuhiro Naka, Kounosu, JP;
Kouetsu Takaya, Kounosu, JP;
Kenji Suzuki, Kounosu, JP;
Takahiro Taguchi, Kounosu, JP;
Yasuhiro Naka, Kounosu, JP;
Kouetsu Takaya, Kounosu, JP;
Kenji Suzuki, Kounosu, JP;
Takahiro Taguchi, Kounosu, JP;
FUJI ELECTRIC CO., LTD., Kawasaki-shi, Kanagawa, JP;
FUJI ELECTRIC FA COMPONENTS & SYSTEMS CO., LTD., Tokyo, JP;
Abstract
An electromagnetic contactor has a pair of fixed contacts disposed and fixed maintaining a predetermined interval; a movable contact disposed to be capable of contacting to and separating from the pair of fixed contacts; an electromagnet unit to drive the movable contact; and a drive circuit driving the electromagnet unit. The electromagnet unit includes at least a movable plunger urged by a return spring, a coil to move the movable plunger, and a ring-form permanent magnet magnetized in a moving direction of the movable plunger. The drive circuit includes a power source to supply power to the coil; a pulse drive circuit to output and supply to the coil an engage pulse causing the movable plunger to perform an attracting operation and a hold pulse maintaining the attracting operation when the movable plunger is subject to the attracting operation, and a flywheel circuit having a semiconductor switching element.