Caterpillar Inc.

John Gunzburger

David Marchand

Gerald Murray Brown

Matthew Earnest Williams

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.

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Channahon, IL, United States of America

John Gunzburger