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:
Apr. 10, 2007
Filed:
Sep. 30, 2004
Applicant:
Meng-chic Lin, Taipei, TW;
Inventor:
Meng-Chic Lin, Taipei, TW;
Assignee:
Asia Vital Component Co., Ltd., Kaohsiung, TW;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H02H 5/04 (2006.01); H02H 7/08 (2006.01);
U.S. Cl.
CPC ...
Abstract
A protective circuit for a motor includes a motor, a drive unit and a control unit. The drive unit is connected to the motor to drive the motor. The control unit is connected to the drive unit to control output or drive current of the drive unit. The motor and the drive unit are incapable of generating high temperature due to excessive drive current being limited by the control unit such that damage of the drive unit and the motor can be avoided. The control unit is a comparator or an operation amplifier connecting with a comparison circuit composed of a capacitor and a plurality of resistors to produce control signal.