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. 19, 1999
Filed:
Jun. 03, 1997
George L Ackerson, Alamo, CA (US);
Jefferson Programmed Power, LLC, Alameda, CA (US);
Abstract
A regenerative braking control apparatus for use with a motor driven by a D.C. power source. In response to a series of operating parameters, the control apparatus causes the motor to transition between a drive mode, a transient mode, a regulated current regenerative braking mode, and a constant PWM regenerative braking mode. In particular, the motor enters the drive mode in response to a request for an increase in speed, the motor enters the transient mode in response to a request for a decrease in speed, the motor enters the regulated current regenerative braking mode in response to a lapse of a predetermined time delay or in response to a request for a reduction in the magnitude of the previously requested decrease in speed, and the motor enters the PWM regenerative braking mode in response to a request to continue braking when the requested braking torque cannot be maintained.