Electric vehicle with adaptive cruise control system
First Claim
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1. A system for adaptively controlling an electric vehicle to maintain a desired speed, comprising:
- a control circuit for producing a control signal to control an electric motor of the vehicle, the control signal being formed based on a control current required to achieve the desired speed; and
a control strategy selection circuit for selecting between at least two motor control schemes that define waveform profiles of the control current.
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Abstract
A novel system for adaptively controlling an electric vehicle to maintain desired speed under variable driving conditions. The system includes a control circuit for producing a control signal to control an electric motor of the vehicle. The control signal is formed based on a control current required to achieve the desired speed. The control strategy selection circuit is configured in the system to determine a motor control scheme that provides an appropriate waveform profile of the control current.
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Citations
25 Claims
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1. A system for adaptively controlling an electric vehicle to maintain a desired speed, comprising:
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a control circuit for producing a control signal to control an electric motor of the vehicle, the control signal being formed based on a control current required to achieve the desired speed; and a control strategy selection circuit for selecting between at least two motor control schemes that define waveform profiles of the control current. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A method of adaptively controlling an electric vehicle to maintain a desired speed, comprising the step of:
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based on control current, forming a control signal to control an electric motor of the vehicle, and selecting a motor control scheme providing an appropriate waveform profile of the control current. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24)
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25. A system for controlling an electric machine, comprising:
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a control circuit for producing a control signal to control the electric machine, the control signal determined from a control current required to achieve a desired speed of th electric machine; and a control strategy for selecting between at least one low efficiency control scheme and one high efficiency control scheme, wherein the control schemes define different waveform profiles of a control current to control the torque of the electric machine.
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Specification