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, 1987
Filed:
Jul. 14, 1986
Applicant:
Inventors:
Richard A Wrege, Muskego, WI (US);
Steven F Chmiel, Milwaukee, WI (US);
Victor A Murn, Muskego, WI (US);
Assignee:
PT Components, Inc., Milwaukee, WI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02P / ;
U.S. Cl.
CPC ...
318786 ; 318785 ;
Abstract
A low cost, low part content single phase AC induction motor control starting circuit is provided which is speed sensitive, load sensitive and AC line voltage fluctuation insensitive. A quad comparator chip (61-64) senses and compares relative magnitudes of main and auxiliary winding voltages (30, 32 and 42) to de-energize the auxiliary winding (2) at cut-out speed, and automatically re-energize the auxiliary winding (2) at cut-in speed to accelerate or restart the motor from a stall or overload condition. Simplified power supply and voltage detection circuitry is also disclosed.