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:
Oct. 03, 2000
Filed:
Aug. 03, 1998
Applicant:
Inventors:
Edward Albert Bos, Ann Arbor, MI (US);
Robert Duane Gaston, Dearborn Heights, MI (US);
Assignee:
Visteon Global Technologies, Inc., Dearborn, MI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02P / ;
U.S. Cl.
CPC ...
388815 ; 312439 ;
Abstract
A speed monitoring and control method for a brushless motor controlled by a controller which provides switching control signals to a plurality of switching elements includes comparing one line voltage of the motor with a signal representing a voltage at the neutral node of the motor, to generate a comparison signal. The method also includes ANDing the comparison signal with a switching control signal to generate a composite feedback signal representative of a rotational speed of the motor's rotor relative to a speed of a rotating magnetic field generated by the stator.