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:
Aug. 04, 1981
Filed:
May. 14, 1979
Donald P Martin, Wheeling, IL (US);
Qwint Systems, Inc., Northbrook, IL (US);
Abstract
A control system for controlling a motor having a plurality of electromagnetic field windings adapted to be separately energized by switching circuitry to control rotation of a rotor in the motor. Digital circuitry generates a plurality of logic signals, one for each respective motor field winding to cause the switching circuitry to energize the field windings in a two phase on mode, a one phase on mode, or in one of a plurality of fractional phase on modes. A signal command source provides a plurality of digital signals to select or gate the desired phase on energization mode of the field windings in response to a feedback signal derived from detecting rotary movement of the rotor. Related methods of controlling a multi-phase motor with digitally generated variable phase modes are also disclosed.