METHOD FOR CONTROLLING OPERATING SPEED AND TORQUE OF ELECTRIC MOTOR
First Claim
1. A method for controlling the operating speed and torque of an electric motor in an operational model, wherein the operational model comprises a plurality of operation positions and an optimal operation region of the electric motor, each operation position corresponding to a speed parameter, a torque parameter and an operating efficiency parameter of the electric motor, the method comprising:
- storing the operational model in a storage device;
detecting a current speed parameter and a current torque parameter corresponding to a current operation position of the electric motor in the operational model;
inputting 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 according to the current speed parameter and the current torque parameter of the electric motor; and
if the current operation position is not located in the optimal operation region;
adjusting at least one of the current speed parameter and the current torque parameter along a first path to move the current operation position to an intermediate operation position corresponding to an intermediate speed parameter and an intermediate is torque parameter and located in the optimal operation region; and
adjusting the intermediate speed parameter and the intermediate torque parameter to move the intermediate operation position to the target operation position along a second path.
1 Assignment
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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.
26 Citations
19 Claims
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1. A method for controlling the operating speed and torque of an electric motor in an operational model, wherein the operational model comprises a plurality of operation positions and an optimal operation region of the electric motor, each operation position corresponding to a speed parameter, a torque parameter and an operating efficiency parameter of the electric motor, the method comprising:
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storing the operational model in a storage device; detecting a current speed parameter and a current torque parameter corresponding to a current operation position of the electric motor in the operational model; inputting 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 according to the current speed parameter and the current torque parameter of the electric motor; and if the current operation position is not located in the optimal operation region; adjusting at least one of the current speed parameter and the current torque parameter along a first path to move the current operation position to an intermediate operation position corresponding to an intermediate speed parameter and an intermediate is torque parameter and located in the optimal operation region; and adjusting the intermediate speed parameter and the intermediate torque parameter to move the intermediate operation position to the target operation position along a second path. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method for controlling the operating speed and the torque of an electric motor in an operational model, wherein the operational model comprises a plurality of operation positions and an optimal operation region of the electric motor, each operation position corresponding to a speed parameter, a torque parameter and an operating efficiency parameter of the electric motor;
- the method comprising;
storing the operational model in a storing device; detecting a current speed parameter and a current torque parameter corresponding to a current operation position of the electric motor in the operational model; inputting 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 according to the current speed parameter and the current torque parameter of the electric motor; if 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 directly move the current operation position to the target operation position without selecting an intermediate operation position in the optimal operation region; and if there is a need to select the intermediate operation position in the optimal operation region; adjusting at least one of the current speed parameter and the current torque parameter along a first path to move the current operation position to the intermediate operation position which corresponds to an intermediate speed parameter and an intermediate torque parameter and is located in the optimal operation region; and adjusting the intermediate speed parameter and the intermediate torque parameter to move the intermediate operation position to the target operation position along a second path.
- the method comprising;
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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 including a plurality of operation positions and an optimal operation region of an electric motor, each operation position corresponding to a speed parameter, a torque parameter and an operating efficiency parameter of the electric motor; wherein the processor is configured to; detect a current speed parameter and a current torque parameter of the electric motor; determine a current operation position of the electric motor in the operational model based on the current speed parameter and the current torque parameter; determine a target speed parameter and a target torque parameter corresponding to a target operation position of the electric motor in the operational model; calculate power requirements for two transition paths connecting the current operation position and the target operation position in the operational model, the two transition paths including a first path consisting of one vector, and a second path consisting of two vectors; and select one of the two transition paths for controlling the electric motor based at least in part on the calculated power requirements. - 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 including an optimal operation region of the electric motor, and the processor configured to; detect a current speed parameter and a current torque parameter of the electric drive motor; determine a current operation position of the electric drive motor in the operational model based on the current speed parameter and the current torque parameter; determine 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; if the current operation position is not located in the optimal operation region, determine whether to select an intermediate operation position in the optimal operation region or directly move the current operation position to the target operation position without selecting an intermediate operation position in the optimal operation region; and send control signals configured to transition the electric drive motor from the current operation position to the target operation position on the operational model. - View Dependent Claims (15, 16, 17, 18, 19)
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Specification