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US 7,332,881 B2Granted
AC drive system for electrically operated vehicle
AssigneeTextron Inc.
InventorsWarren Clark, Oliver A. Bell
Life of this patent
Estimating the term…
Abstract
A drive system for an electric vehicle includes a motor for providing a drive torque and an electrically actuated brake for providing a braking torque to the motor. The system includes a controller that receives a plurality of inputs which may include a battery voltage input, a throttle pedal position input, a brake pedal position input, a key switch input, a forward/neutral/reverse (FNR) input, and a brake full-stroke input in addition to the brake pedal input. The controller may generate a drive signal for the motor based on some or all of the inputs.
Claims38
A drive system for a vehicle, comprising:
- a motor for providing a drive torque;
- an electrically actuated brake for providing a braking torque to the motor;
- and
- a controller that receives a battery voltage input, a throttle pedal position input, a brake pedal position input, a key switch input, a forward/neutral/reverse (FNR) input, and a brake full-stroke input in addition to the brake pedal position input, 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 the brake pedal position input and the brake full-stroke input, and the drive signal includes at least one of a pulse width modulation signal and a pulse frequency modulation signal.
2 more elements
A drive system for a vehicle, comprising:
- a motor for providing a drive torque;
- an electrically actuated brake for providing a braking torque to the motor;
- and
- a controller that receives a battery voltage input, a throttle pedal position input, a brake pedal position input, a key switch input, a forward/neutral/reverse (FNR) input, and a brake full-stroke input in addition to the brake pedal position input, 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 the brake pedal position input and the brake full-stroke input, and determines a maximum speed of the motor based on the battery voltage input.
2 more elements
A drive system for a vehicle, comprising:
- a motor for providing a drive torque;
- an electrically actuated brake for providing a braking torque to the motor;
- and
- a controller that receives a battery voltage input, a throttle pedal position input, a brake pedal position input, a key switch input, a forward/neutral/reverse (FNR) input, and a brake full-stroke input in addition to the brake pedal position input, 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 the brake pedal position input and the brake full-stroke input, and
- wherein the controller further receives a run/tow input indicative of the vehicle being configured to be driven and configured to be towed, and wherein the controller determines a maximum speed of the motor based on the tow switch input and the FNR input.
3 more elements
A drive system for a vehicle, comprising:
- a motor for providing a drive torque;
- an electrically actuated brake for providing a braking torque to the motor;
- and
- a controller that receives a battery voltage input, a throttle pedal position input, a brake pedal position input, a key switch input, a forward/neutral/reverse (FNR) input, and a brake full-stroke input in addition to the brake pedal position input, 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 the brake pedal position input and the brake full-stroke input, and slows the motor when the brake pedal position input indicates greater than 0% braking command regardless of the battery voltage input, throttle pedal position input, and FNR input.
2 more elements
A drive system for a vehicle, comprising:
- a motor for providing a drive torque;
- an electrically actuated brake for providing a braking torque to the motor;
- and
- a controller that receives a battery voltage input, a throttle pedal position input, a brake pedal position input, a key switch input, a forward/neutral/reverse (FNR) input, and a brake full-stroke input in addition to the brake pedal position input, 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 the brake pedal position input and the brake full-stroke input, and
- wherein the controller determines a SOC of a battery and determines a maximum speed of the motor based on the SOC.
3 more elements
A drive system for a vehicle, comprising:
- a motor for providing a drive torque;
- an electrically actuated brake for providing a braking torque to the motor;
- and
- a controller that receives a battery voltage input, a throttle pedal position input, a brake pedal position input, a key switch input, a forward/neutral/reverse (FNR) input, and a brake full-stroke input in addition to the brake pedal position input, 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 the brake pedal position input and the brake full-stroke input, and
- a contactor that selectively connects the drive signal and the motor, wherein the controller further generates a PWM contactor control signal that is communicated to the contactor wherein the controller generates the contactor control signal at a first PWM duty cycle when closing the contactor and generates the contactor control signal at a second PWM duty cycle after the contactor is closed.
2 more elements
A drive system for a vehicle, comprising:
- a motor for providing a drive torque;
- an electrically actuated brake for providing a braking torque to the motor;
- and
- a controller that receives a battery voltage input, a throttle pedal position input, a brake pedal position input, a key switch input, a forward/neutral/reverse (FNR) input, and a brake full-stroke input in addition to the brake pedal position input, the controller generating a drive signal for the motor based on the inputs;
- wherein the controller generates and sends a brake control signal to the electrically actuated brake based on the brake pedal position input and the brake full-stroke input, the brake control signal generated at a first PWM duty cycle when applying the electrically actuated brake and generates the brake control signal at a second PWM duty cycle after the electrically actuated brake is applied.
2 more elements
A drive system for a vehicle, comprising:
- a motor for providing a drive torque;
- an electrically actuated brake for providing a braking torque to the motor;
- and
- a controller that receives a battery voltage input, a throttle pedal position input, a brake pedal position input, a key switch input, a forward/neutral/reverse (FNR) input, and a brake full-stroke input in addition to the brake pedal position input, 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 the brake pedal position input and the brake full-stroke input, and reduces the speed of the motor at a predetermined rate when the brake pedal position input indicates 0% braking command and the throttle pedal position input indicates 0% throttle command.
2 more elements
A drive system for a vehicle, comprising:
- a motor for providing a drive torque;
- an electrically actuated brake for providing a braking torque to the motor;
- and
- a controller that receives a battery voltage input, a throttle pedal position input, a brake pedal position input, a key switch input, a forward/neutral/reverse (FNR) input, and a brake full-stroke input in addition to the brake pedal position input, 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 the brake pedal position input and the brake full-stroke input, and
- a locking differential that receives and redirects the drive torque to a pair of axles, wherein the locking differential locks and unlocks in accordance with a differential control signal that is generated by the controller at a first PWM duty cycle when locking the locking differential and at a second PWM duty cycle after the locking differential is locked.
2 more elements
A drive system for a vehicle comprising:
- a motor for providing a drive torque;
- an electrically actuated brake for providing a braking torque to the motor;
- and
- a controller that receives a battery voltage input, a throttle pedal position input, a brake pedal position input, a key switch input, a forward/neutral/reverse (FNR) input, and a brake full-stroke input in addition to the brake pedal position input, 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 the brake pedal position input and the brake full-stroke input, and the electrically actuated brake is deenergized to apply a braking torque to the motor.
2 more elements
A drive system for a vehicle comprising:
- a motor for providing a drive torque;
- an electrically actuated brake for providing a braking torque to the motor;
- and
- a controller that receives a battery voltage input, a throttle pedal position input, a brake pedal position input, a key switch input, a forward/neutral/reverse (FNR) input, and a brake full-stroke input in addition to the brake pedal position input, 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 the brake pedal position input and the brake full-stroke input, and the electrically actuated brake is deenergized to apply a braking torque to the motor when the brake pedal has been depressed to within a predetermined percentage of its full stroke.
2 more elements
A drive system for a vehicle comprising:
- a motor for providing a drive torque;
- an electrically actuated brake for providing a braking torque to the motor;
- and
- a controller that receives a battery voltage input, a throttle pedal position input, a brake pedal position input, a key switch input, a forward/neutral/reverse (FNR) input, and a brake full-stroke input in addition to the brake pedal position input, 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 the brake pedal position input and the brake full-stroke input, and the electrically actuated brake is deenergized to apply a braking torque to the motor when the brake full stroke sensor input to the controller indicates that the brake pedal has been depressed to within a predetermined percentage of its full stroke.
2 more elements
A drive system for a vehicle comprising:
- a motor for providing a drive torque;
- an electrically actuated brake for providing a braking torque to the motor;
- and
- a controller that receives a battery voltage input, a throttle pedal position input, a brake pedal position input, a key switch input, a forward/neutral/reverse (FNR) input, and a brake full-stroke input in addition to the brake pedal position input, 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 the brake pedal position input and the brake full-stroke input, and the controller is configured to vary electrical energy applied to the electrically actuated brake based on the brake pedal position input.
2 more elements
A drive system for a vehicle, comprising:
- a motor for providing a drive torque;
- an electrically actuated brake for providing a braking torque to the motor;
- 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, a key switch input, a forward/neutral/reverse input, and a brake full stroke input in addition to the brake pedal position input, the controller generating a drive signal for the motor based on the inputs;
- wherein the electrically actuated brake is operated in accordance with the brake full stroke input and is actuated independently of the controller.
1 more element
A drive system for a vehicle, comprising:
- a motor for providing a drive torque;
- an electrically actuated brake for providing a braking torque to the motor;
- 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, a key switch input, a forward/neutral/reverse input, and a brake full stroke input in addition to the brake pedal position input, the controller generating a drive signal for the motor based on the inputs;
- wherein the electrically actuated brake is operated in accordance with the brake full stroke input and is deenergized to apply a braking torque to the motor.
1 more element
A drive system for a vehicle, comprising:
- a motor for providing a drive torque;
- an electrically actuated brake for providing a braking torque to the motor;
- 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, a key switch input, a forward/neutral/reverse input, and a brake full stroke input in addition to the brake pedal position input, the controller generating a drive signal for the motor based on the inputs;
- wherein the electrically actuated brake is operated in accordance with the brake full stroke input and is deenergized to apply a braking torque to the motor when the brake pedal has been depressed to within a predetermined percentage of its full stroke.
1 more element
A drive system for a vehicle, comprising:
- a motor for providing a drive torque;
- an electrically actuated brake for providing a braking torque to the motor;
- 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, a key switch input, a forward/neutral/reverse input, and a brake full stroke input in addition to the brake pedal position input, the controller generating a drive signal for the motor based on the inputs;
- wherein the electrically actuated brake is operated in accordance with the brake full stroke input and is deenergized to apply a braking torque to the motor when the brake full stroke sensor input indicates that the brake pedal has been depressed to within a predetermined percentage of its full stroke.
1 more element
A drive system for a vehicle, comprising:
- a motor for providing a drive torque;
- an electrically actuated brake for providing a braking torque to the motor;
- 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, a key switch input, a forward/neutral/reverse input, and a run/tow input indicative of the vehicle being configured to be driven or being configured to be towed, the controller generates a drive signal for the motor based on the inputs, the controller generating a drive signal for the motor and a brake control signal for the electrically actuated brake,
- wherein when the run/tow input is switched to tow mode, the controller energizes the electrically actuated brake.
1 more element
A drive system for a vehicle, comprising:
- a motor for providing a drive torque;
- an electrically actuated brake for providing a braking torque to the motor;
- 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, a key switch input, a forward/neutral/reverse input, and a run/tow input indicative of the vehicle being configured to be driven or being configured to be towed, the controller generating a drive signal for the motor based on the inputs,
- wherein when the run/tow input indicates a tow mode, the controller generates a signal to the motor to limit power dissipation and consumption by the motor during towing.
1 more element
A drive system for a vehicle, comprising:
- a motor for providing a drive torque;
- 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, a key switch input, a forward/neutral/reverse input, and a run/tow input indicative of the vehicle being configured to be driven or being configured to be towed, the controller generating a drive signal for the motor based on the inputs,
- wherein when the run/tow input is in tow mode, the controller energizes a main contactor of the motor.
A drive system for a vehicle, comprising:
- a motor for providing a drive torque;
- 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, a key switch input, and a forward/neutral/reverse input, the controller generating a drive signal for the motor based on the inputs,
- wherein the controller sends a signal to the motor to decrease the speed of the motor when the vehicle is moving and neither the throttle pedal nor the brake pedal is engaged.
A drive system for a vehicle, comprising:
- a motor for providing a drive torque;
- 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, a key switch input, and a forward/neutral/reverse input, the controller generating a drive signal for the motor based on the inputs,
- wherein the controller deenergizes a main contactor of the system when the throttle pedal is not engaged.
Dependencies are inferred from the claim text.