AC drive system for electrically operated vehicle
CAFCFirst Claim
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1. 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.
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Reexamination
Accused Products
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.
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Citations
38 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 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.
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2. A drive system for a vehicle, comprising:
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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.
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3. A drive system for a vehicle, comprising:
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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.
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4. A drive system for a vehicle, comprising:
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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.
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5. A drive system for a vehicle, comprising:
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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.
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6. A drive system for a vehicle, comprising:
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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.
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7. A drive system for a vehicle, comprising:
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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. - View Dependent Claims (8)
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9. A drive system for a vehicle, comprising:
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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.
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10. A drive system for a vehicle, comprising:
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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.
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11. A drive system for a vehicle comprising:
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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.
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12. A drive system for a vehicle comprising:
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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.
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13. A drive system for a vehicle comprising:
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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.
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14. A drive system for a vehicle comprising:
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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.
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15. A drive system for a vehicle, comprising:
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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.
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16. A drive system for a vehicle, comprising:
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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.
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17. A drive system for a vehicle, comprising:
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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.
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18. A drive system for a vehicle, comprising:
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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.
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19. A drive system for a vehicle, comprising:
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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. - View Dependent Claims (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 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. - View Dependent Claims (28, 29, 30)
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31. A drive system for a vehicle, comprising:
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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. - View Dependent Claims (33, 34)
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32. A drive system for a vehicle, comprising:
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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.
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35. A drive system for a vehicle, comprising:
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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. - View Dependent Claims (36, 37, 38)
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Specification