Method for controlling operating speed and torque of electric motor
First Claim
1. A method of operating an electric vehicle by controlling the operating speed and torque of an electric motor of the electric vehicle in accordance with an operational model, wherein the operational model comprises a plurality of operation positions of the electric motor and an optimal operation region of the electric motor, each operation position indicating at least a value for a speed parameter, a torque parameter and an operating efficiency parameter of the electric motor, the optimal operation region includes one or more of the operation positions, the method comprising:
- storing, by a processor, the operational model in a storage device;
detecting, by a sensor, the current speed parameter and the current torque parameter corresponding to the current operation position of the electric motor in the operational model;
receiving, by 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;
in response to the target speed parameter and target torque parameter being received, adjusting, by the processor, the current operation position to the target operation position, wherein the adjusting comprises;
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
in response to the current operation position being determined not located in the optimal operation region;
generating a first instruction to adjust 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 torque parameter and located in the optimal operation region; and
generating a second instruction to adjust the intermediate speed parameter and the intermediate torque parameter to move the intermediate operation position to the target operation position along a second path; and
executing, by the processor, the first and second instructions to adjust the current operation position to the target operation position.
1 Assignment
0 Petitions
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.
39 Citations
19 Claims
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1. A method of operating an electric vehicle by controlling the operating speed and torque of an electric motor of the electric vehicle in accordance with an operational model, wherein the operational model comprises a plurality of operation positions of the electric motor and an optimal operation region of the electric motor, each operation position indicating at least a value for a speed parameter, a torque parameter and an operating efficiency parameter of the electric motor, the optimal operation region includes one or more of the operation positions, the method comprising:
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storing, by a processor, the operational model in a storage device; detecting, by a sensor, the current speed parameter and the current torque parameter corresponding to the current operation position of the electric motor in the operational model; receiving, by 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; in response to the target speed parameter and target torque parameter being received, adjusting, by the processor, the current operation position to the target operation position, wherein the adjusting comprises; 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 in response to the current operation position being determined not located in the optimal operation region; generating a first instruction to adjust 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 torque parameter and located in the optimal operation region; and generating a second instruction to adjust the intermediate speed parameter and the intermediate torque parameter to move the intermediate operation position to the target operation position along a second path; and executing, by the processor, the first and second instructions to adjust the current 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 for controlling the operating speed and the torque of an electric motor of the electric vehicle in accordance with an operational model, wherein the operational model comprises a plurality of operation positions of the electric motor and an optimal operation region of the electric motor, each operation position indicates at least a value for a speed parameter, a torque parameter and an operating efficiency parameter of the electric motor, the optimal operation region includes one or more of the operation positions, the method comprising:
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storing, by a processor, the operational model in a storing device; detecting, by a sensor, the current speed parameter and the current torque parameter corresponding to the current operation position of the electric motor in the operational model; receiving, by 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; in response to the target speed parameter and target torque parameter being received, adjusting, by the processor, the current operation position to the target operation position, wherein the adjusting comprises; 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; 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 directly move the current operation position to the target operation position without selecting an intermediate operation position in the optimal operation region; and in response to determining to select the intermediate operation position in the optimal operation region; generating a first instruction to adjust 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 generating a second instruction to adjust the intermediate speed parameter and the intermediate torque parameter to move the intermediate operation position to the target operation position along a second path; and executing, by the processor, the first and second instructions to adjust the current operation position to the target 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 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; and
, wherein the processor is configured to;detect, by a sensor, a current speed parameter and a current torque parameter of the electric motor; determine the current speed parameter and the current torque parameter corresponding to the current operation position of the electric motor in the operational model; receive, by 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; in response to the target speed parameter and target torque parameter being received, adjust the current operation position to the target operation position, wherein the adjusting comprises; 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 in response to the current operation position being determined not located in the optimal operation region; generating a first instruction to adjust 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 torque parameter and located in the optimal operation region; and generating a second instruction to adjust the intermediate speed parameter and the intermediate torque parameter to move the intermediate operation position to the target operation position along a second path; and executing, the first and second instructions to adjust the current 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 central processing unit (CPU) and a memory with an operational model stored therein, the operational model including a plurality of operation positions of the electric motor and an optimal operation region of the electric motor, each operation position indicating at least a value for a speed parameter, a torque parameter and an operating efficiency parameter of the electric motor, the optimal operation region includes one or more of the operation positions, and the CPU is configured to; detect, by a sensor, the current speed parameter and the 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; receive, by 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; in response to the target speed parameter and target torque parameter being received, adjust the current operation position to the target operation position, wherein the adjusting comprises; determining whether the current operation position is located in the optimal operation region; in response to the current operation position being determined 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 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