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:
Jan. 07, 1997
Filed:
Feb. 14, 1996
Applicant:
Inventor:
Yasushi Nishibe, Niwa, JP;
Assignee:
Kabushiki Kaisha Tokai-Rika-Denki-Seisakusho, Niwa, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03K / ; H03K / ;
U.S. Cl.
CPC ...
327 87 ; 327 77 ; 327 89 ; 327205 ;
Abstract
A motor current detection circuit is formed of a current detector for detecting an overloaded state of a motor by comparing a motor current value, which represents current flowing through the motor, with a predetermined reference value, and a hysteresis generating circuit for generating, in the current detector, a hysteresis characteristic corresponding to an integrated value with respect to time of an increment amount by which the motor current value exceeds the reference value. Chattering in output of the current detector is reduced so that an overloaded state of the motor can be detected quickly.