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:
Dec. 04, 2012
Filed:
Sep. 15, 2008
David G. Marchand, Dunlap, IL (US);
Matthew E. Williams, East Peoria, IL (US);
Gerald Brown, Cedarville, OH (US);
John Gunzburger, Channahon, IL (US);
David G. Marchand, Dunlap, IL (US);
Matthew E. Williams, East Peoria, IL (US);
Gerald Brown, Cedarville, OH (US);
John Gunzburger, Channahon, IL (US);
Caterpillar Inc., Peoria, IL (US);
Abstract
A retarding system for an electric drive machine () includes a direct current (DC) link (), at which a DC voltage is developed, disposed between a rectifier () and an inverter (). A first contactor switch () electrically communicates with a first rail of the DC link (), and a second contactor switch () electrically communicates with a second rail of the DC link (). A first resistor grid () is connected in series between the first contactor switch () and the second contactor switch (). The first resistor grid () dissipates electrical energy in the form of heat by conducting a current between the first rail and the second rail of the DC link () when the first contactor switch () and the second contactor switch () are closed.