Method for controlling operating speed and torque of electric motor
First Claim
1. A method of operating an electric vehicle by controlling an operating speed and/or a torque of an electric motor of the electric vehicle in accordance with an operational model, the method being implemented by a processor configured to execute machine-readable instructions, the method comprising:
- storing the operational model in a storage device, the operational model comprising a plurality of operation positions of the electric vehicle, an optimal region of the electric motor, a given operation position corresponding to a speed parameter, a torque parameter and an operation efficiency parameter of the electric motor;
receiving a value for a current speed parameter and a value for a current torque parameter from a sensor device;
determining a current operation position of the electric motor in the operational model based on the value for the current speed parameter and the value for the current torque parameter;
receiving, from a driving input system, a target speed parameter and a target torque parameter corresponding to a target operation position of the electric motor in the operational model;
determining whether the current operation position is located in the optimal operation region; and
in response to the current operation position being determined not located in the optimal operation region;
adjusting at least one of the current speed parameter and the current torque parameter to move, along a first path, the current operation position to an intermediate operation position, the intermediate operation position corresponding to a value for an intermediate speed parameter and value for an intermediate torque parameter, and being located in the optimal operation region; and
adjusting at least one of the intermediate speed parameter and the intermediate torque parameter to move, along a second path, the intermediate operation position to the target operation position.
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Accused Products
Abstract
Systems and methods for controlling the operating speed and the torque of an electric motor using an operational model are described. An operational model for the electric motor, including a plot of engine performance parameters, is used for reference, and a most efficient output path, which may pass through an optimal operation region in the operational model, is selected. The most efficient output path may be determined, for example, according to locations of a current output state and a to-be-reached target state in the operational model, enabling the operating state of the motor to reach the target state from the current operating state. By selecting a more efficient output path, the operating efficiency of the motor may be optimized, the life of a battery improved and/or the operating mileage of the vehicle may be increased, without significantly reducing the driving experience.
45 Citations
18 Claims
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1. A method of operating an electric vehicle by controlling an operating speed and/or a torque of an electric motor of the electric vehicle in accordance with an operational model, the method being implemented by a processor configured to execute machine-readable instructions, the method comprising:
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storing the operational model in a storage device, the operational model comprising a plurality of operation positions of the electric vehicle, an optimal region of the electric motor, a given operation position corresponding to a speed parameter, a torque parameter and an operation efficiency parameter of the electric motor; receiving a value for a current speed parameter and a value for a current torque parameter from a sensor device; determining a current operation position of the electric motor in the operational model based on the value for the current speed parameter and the value for the current torque parameter; receiving, from a driving input system, a target speed parameter and a target torque parameter corresponding to a target operation position of the electric motor in the operational model; determining whether the current operation position is located in the optimal operation region; and in response to the current operation position being determined not located in the optimal operation region; adjusting at least one of the current speed parameter and the current torque parameter to move, along a first path, the current operation position to an intermediate operation position, the intermediate operation position corresponding to a value for an intermediate speed parameter and value for an intermediate torque parameter, and being located in the optimal operation region; and adjusting at least one of the intermediate speed parameter and the intermediate torque parameter to move, along a second path, the intermediate operation position to the target operation position. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method of operating an electric vehicle by controlling an operating speed and/or a torque of an electric motor of the electric vehicle in accordance with an operational model, the method being implemented by a processor configured to execute machine-readable instructions, the method comprising:
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storing the operational model in a storage device, the operational model comprising a plurality of operation positions of the electric vehicle, an optimal region of the electric motor, a given operation position corresponding to a speed parameter, a torque parameter and an operation efficiency parameter of the electric motor; receiving a value for a current speed parameter and a value for a current torque parameter from a sensor device; determining a current operation position of the electric motor in the operational model based on the value for the current speed parameter and the value for the current torque parameter; determining whether the current operation position is located in the optimal operation region; in response to determining the current operation position is not located in the optimal operation region; determining whether to select an intermediate operation position in the optimal operation region or to directly move the current operation position to the target operation position without selecting the intermediate operation position; and in response to determining to select the intermediate operation position in the optimal operation region; selecting the intermediate operation position; and moving the current operation position to the target operation position via the intermediate operation position.
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8. An electric vehicle motor controller, comprising:
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a processor; and a storage device including an operational model stored thereon, the operational model comprising a plurality of operation positions of the electric vehicle, an optimal region of the electric motor, a given operation position corresponding to a speed parameter, a torque parameter and an operation efficiency parameter of the electric motor; and
, wherein the processor is configured to;receive a value for a current speed parameter and a value for a current torque parameter from a sensor device; determine a current operation position of the electric motor in the operational model based on the value for the current speed parameter and the value for the current torque parameter; receive, from a driving input system, a target speed parameter and a target torque parameter corresponding to a target operation position of the electric motor in the operational model; determine whether the current operation position is located in the optimal operation region; and in response to the current operation position being determined not located in the optimal operation region; adjust at least one of the current speed parameter and the current torque parameter to move, along a first path, the current operation position to an intermediate operation position, the intermediate operation position corresponding to a value for an intermediate speed parameter and value for an intermediate torque parameter, and being located in the optimal operation region; and adjust at least one of the intermediate speed parameter and the intermediate torque parameter to move, along a second path, the intermediate operation position to the target operation position. - View Dependent Claims (9, 10, 11, 12, 13)
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14. An electric vehicle comprising:
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an electric drive motor; a battery configured to power the electric drive motor; and an electric vehicle motor controller including a processor and a memory with an operational model stored therein, the operational model comprising a plurality of operation positions of the electric vehicle, an optimal region of the electric motor, a given operation position corresponding to a speed parameter, a torque parameter and an operation efficiency parameter of the electric motor, and the processor is configured to; store the operational model in a storage device, the operational model comprising a plurality of operation positions of the electric vehicle, an optimal region of the electric motor, a given operation position corresponding to a speed parameter, a torque parameter and an operation efficiency parameter of the electric motor; receive a value for a current speed parameter and a value for a current torque parameter from a sensor device; determine a current operation position of the electric motor in the operational model based on the value for the current speed parameter and the value for the current torque parameter; receive, from a driving input system, a target speed parameter and a target torque parameter corresponding to a target operation position of the electric motor in the operational model; determine whether the current operation position is located in the optimal operation region; and in response to the current operation position being determined not located in the optimal operation region; adjust at least one of the current speed parameter and the current torque parameter to move, along a first path, the current operation position to an intermediate operation position, the intermediate operation position corresponding to a value for an intermediate speed parameter and value for an intermediate torque parameter, and being located in the optimal operation region; and adjust at least one of the intermediate speed parameter and the intermediate torque parameter to move, along a second path, the intermediate operation position to the target operation position. - View Dependent Claims (15, 16, 17, 18)
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Specification