Patent ID: 8198871
Filing Date: 2012-06-12
Classification: H02P

Abstract:
1. An electric drive machine, comprising: a frame; ground engaging elements connected to the frame; a motor operatively coupled to the ground engaging elements; a generator including a generator shaft, in electrical communication with the motor; an engine, operatively coupled to the generator shaft; the generator further including: a generator field and a generator output winding; a field current control circuit including a first voltage source in electrical communication with a time lag reduction circuit; the time lag reduction circuit includes an energy storage component being in electrical communication with a time lag reduction voltage source; the energy storage component being in selective electrical communication with the generator field via an electrical switch; an electronic controller having a time lag reduction algorithm resident thereon that receives an operator acceleration command and communicates one of an open switch signal and a close switch signal to the electrical switch; the energy storage component being out of electrical communication with the generator field when the electrical switch receives the open switch signal; the energy storage component being in electrical communication with the generator field when the electrical switch receives the close switch signal; and wherein closure of the electrical switch surges current to the generator field toward a target current responsive to discharge of electrical energy from the electrical storage component wherein the time lag reduction voltage source is a source for charging the electrical storage component with electrical energy prior to a subsequent closure of the electrical switch.