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:
May. 29, 2001
Filed:
Oct. 05, 1999
Applicant:
Inventors:
Ronald S. Boe, Castaic, CA (US);
Robert W. Deller, Newhall, CA (US);
Robert C. Heagey, Acton, CA (US);
Assignee:
H.R. Textron, Inc., Santa Clarita, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02K 2/300 ;
U.S. Cl.
CPC ...
H02K 2/300 ;
Abstract
A method and system for advancing the state of commutation of an electronically commutated brushless D.C. motor. Impending motor stall is detected by measuring current flow through the motor windings to ascertain magnetic saturation. Upon such detection, a time sequence is started and if a change of state has not occurred within the time sequence, the state is advanced to the next succeeding state.