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. 23, 2013
Filed:
Apr. 26, 2010
Applicant:
Zimin W. Vilar, Dubuque, IA (US);
Inventor:
Zimin W. Vilar, Dubuque, IA (US);
Assignee:
Deere & Company, Moline, IL (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02P 3/12 (2006.01); H02P 3/22 (2006.01);
U.S. Cl.
CPC ...
Abstract
An electric drive system comprises a generator, a traction motor, a brake resistor, a bus, and a control unit. The generator, the traction motor, and the brake resistor are coupled electrically to the bus. The control unit is configured to determine a pulse-width-modulation duty cycle for the brake resistor ('brake duty') and control operation of the brake resistor according to the brake duty, wherein the brake duty can be a value intermediate of constant OFF and constant ON. A method of operating the electric drive system is also disclosed.