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:
Jun. 26, 2001
Filed:
May. 23, 2000
Applicant:
Inventor:
Roy A. McCann, Saginaw, MI (US);
Assignee:
Valeo Electrical Systems, Inc., Auburn Hills, MI (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B60B 3/900 ; B60T 7/00 ;
U.S. Cl.
CPC ...
B60B 3/900 ; B60T 7/00 ;
Abstract
A controller for an electric brake system in a vehicle. The brake system utilizes switched reluctance electric motors to apply braking force to wheels. Such motors have non-ideal torque-speed characteristics, wherein excessive amounts of time and current are required to change torque delivered. The invention reduces the times, and currents, by adjusting the phase angle, and durations, of current pulses delivered to the coils of the motor. The adjustment is based on several parameters, including presently demanded torque, speed of the electric motor, deviation of vehicle system voltage from a norm, and deviation of motor temperature from a norm.