AC drive system for electrically operated vehicle
First Claim
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1. A drive system for a vehicle, comprising:
- a motor for providing a drive torque;
an electrically actuated brake mounted to a shaft of the motor for providing a braking torque to the motor shaft; and
a controller that receives a battery voltage input, a throttle pedal position input, a brake pedal position input that indicates a position of a brake pedal, a key switch input, a forward/neutral/reverse (FNR) input, and a brake pedal full-stroke input, that indicates a full-stroke position of the brake pedal, the controller generating a drive signal for the motor based on the inputs;
wherein the controller sends a signal to the electrically actuated brake based on at least one of the brake pedal position input and the brake full-stroke input.
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Abstract
A drive system is provided for a utility vehicle and includes an alternating-current (AC) motor for providing a drive torque. An AC motor controller receives a battery voltage signal, throttle pedal position signal, brake pedal position signal, key switch signal, forward/neutral/reverse (FNR) signal, and run/tow signal indicative of the utility vehicle being configured to be driven and being configured to be towed. The AC motor controller generates an AC drive signal for the AC motor, wherein the AC drive signal is based on the battery voltage signal, throttle pedal position signal, brake pedal position signal, key switch signal, FNR signal, and run/tow signal.
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Citations
33 Claims
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1. A drive system for a vehicle, comprising:
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a motor for providing a drive torque; an electrically actuated brake mounted to a shaft of the motor for providing a braking torque to the motor shaft; and a controller that receives a battery voltage input, a throttle pedal position input, a brake pedal position input that indicates a position of a brake pedal, a key switch input, a forward/neutral/reverse (FNR) input, and a brake pedal full-stroke input, that indicates a full-stroke position of the brake pedal, the controller generating a drive signal for the motor based on the inputs; wherein the controller sends a signal to the electrically actuated brake based on at least one of the brake pedal position input and the brake full-stroke input. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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27. A drive system for a vehicle, comprising:
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a motor for providing a drive torque; an electrically actuated brake mounted to a shaft of the motor for providing a braking torque to the motor shaft; and a controller that receives a battery voltage input, a throttle pedal position input that varies in accordance with a position of the throttle pedal, a brake pedal position input that varies in accordance with a position of the brake pedal to indicate a commanded vehicle deceleration rate, a key switch input, a forward/neutral/reverse input, and a brake pedal full stroke input indicative of whether the brake pedal has been depressed to a parking brake position, the controller generating a drive signal for the motor based on the inputs; wherein the electrically actuated brake is operated to effect a parking brake function preventing rotation of the motor shaft when the brake pedal full stroke input indicates that the brake pedal has been depressed to the parking brake position. - View Dependent Claims (32, 33)
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28. A drive system for a vehicle, comprising:
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a motor for providing a drive torque; a motor shaft mounted, spring applied, electrically released brake for providing a braking torque to the motor shaft; a controller that receives a battery voltage input, a throttle pedal position input that varies in accordance with a position of the throttle pedal, a brake pedal position input that varies in accordance with a position of the brake pedal to indicate a commanded vehicle deceleration rate, a key switch input, a forward/neutral/reverse input, and a brake pedal full stroke input indicative of whether the brake pedal has been depressed to a parking brake position, the controller generates a drive signal for the motor based on the inputs, wherein the controller actuates the electrically released brake to effect a parking brake function preventing rotation of the motor shaft when the key switch input indicates an OFF condition. - View Dependent Claims (29, 30, 31)
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Specification