B - Operations – Transporting – 60 – L
Patent
B - Operations, Transporting
60
L
B60L 3/00 (2006.01) B60K 1/02 (2006.01) B60K 17/12 (2006.01) B60K 17/356 (2006.01) B60K 6/02 (2006.01) B60K 6/04 (2006.01)
Patent
CA 2329268
A vehicle electric drive system includes an internal combustion engine, an electric motor/generator driven by the engine, a first inverter/rectifier coupled to motor/generator, a buss coupled to the first inverter/rectifier, a second inverter/rectifier coupled to the buss, and a traction motor/generator coupled to an output of the second inverter/rectifier, an operator speed control member, and a controller coupled to the second inverter/rectifier for controlling a current output of the second inverter/rectifier as a function of a position of the speed control member. Also included is an operator controlled foot pedal and a transducer coupled to the foot pedal and generating a signal representing foot pedal position which is supplied to the controller. The controller limits current supplied by the second inverter/rectifier to the traction motor/generator to a limit current as a function of the transducer signal. The controller, foot pedal and transducer cooperate to vary the limit current in response to movement of the foot pedal. A spring biases the foot pedal to an upper limit position. The controller causes the second inverter/rectifier to supply to the traction motor/generator a maximum amount of current, (such maximum current being a function of the foot pedal position), but not more than that required to achieve the speed commanded by the speed control.
Kasten Robert Eugene
Lemmon Norman Frederick
Newendorp Bruce Craig
Borden Ladner Gervais Llp
Deere & Company
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