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:
Apr. 30, 2002
Filed:
Jun. 05, 2000
Kenneth George Draves, Russiaville, IN (US);
Paul M. Werking, Tipton, IN (US);
Delphi Technologies, Inc., Troy, MI (US);
Abstract
Improved motor position detection circuitry based on commutation pulse counting, including a pulse recognition circuit, a pulse counting circuit, and a start pulse rejection circuit for rendering the position detection circuitry insensitive to start-up pulses associated with motor turn-on. The start pulse rejection circuit detects an off-to-on transition of a motor controller, and renders the position detection circuitry insensitive to start-up pulses generated in a predefined time window coinciding with the detected off-to-on transition. In a first mechanization, the start pulse rejection circuit maintains a nominal bias voltage at an input of the pulse recognition circuit for the duration of the predefined time window. In a second mechanization, the start pulse rejection circuit renders the pulse counting circuit insensitive to pulses produced by the pulse recognition circuit for the duration of the predefined time window.