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. 07, 1997
Filed:
May. 02, 1996
Applicant:
Inventors:
John E Makaran, London, CA;
Jerzy Muszynski, London, CA;
Assignee:
Siemens Electric Limited, Mississauga, Ontario, CA;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H02H / ;
U.S. Cl.
CPC ...
361 23 ; 361115 ; 361 30 ;
Abstract
A protection system for an electric motor is disclosed. The system is adapted for providing protection to the motor in the event of a stall or reduced-speed condition. The system includes a sensor providing a first signal representative of the speed of the motor, a detection circuit receiving the first signal and providing a second signal indicative of whether the motor is in a stall or reduced-speed condition, and a switching circuit receiving the second signal and interrupting power supply to the motor when the second signal indicates that the motor is in the stall or reduced-speed condition.