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. 05, 1988
Filed:
Jul. 05, 1985
Jack V Fultz, Thousand Oaks, CA (US);
Pertec Peripherals Corporation, Chatsworth, CA (US);
Abstract
A speed control system for an electronically commutated motor having stator windings, a rotor mounted for rotation relative to said windings, switches for individually energizing said windings, and phase steering means operable to close said switches to sequentially energize said windings. The control system includes means responsive to a rotational position of said rotor for initiating a speed measurement cycle, means for measuring rotor speed during each speed measurement cycle and for comparing the measured speed with a speed set-point, and means responsive to the rotor speed being less than said set-point for enabling said phase steering means to energize said windings.