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An optimization method for the speed regulator of the driving motor under the AMT gear shift of the electric vehicle

A technology for speed regulators and electric vehicles, which is applied in AC motor acceleration/deceleration control, motor control, AC motor control, etc. It can solve the problems of long shift time and easy gear hitting, etc., and achieve smooth shift experience. Small action strength, the effect of suppressing overshoot

Active Publication Date: 2020-06-09
四川芯智热控技术有限公司
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Problems solved by technology

[0003] The purpose of the present invention is to provide a method that can effectively reduce the ratio when shifting gears, aiming at the problems that the single PI algorithm in the speed control of the traditional electric vehicle has overshoot, which causes the shifting time to be too long and the gears are easy to hit when shifting gears. The effect strength of the link, suppressing the overshoot of the speed ring, to obtain a fast, accurate and smooth state to complete the shifting experience The optimization method of the drive motor speed regulator under the electric vehicle AMT shifting

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  • An optimization method for the speed regulator of the driving motor under the AMT gear shift of the electric vehicle

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[0008] Below in conjunction with accompanying drawing, the present invention is described in detail.

[0009] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0010] like figure 1 As shown, a method for optimizing the speed regulator of the drive motor under AMT gear shifting of an electric vehicle. When the electric vehicle is automatically shifting gears, the reference speed ω*m is given by the vehicle controller VCU, and is fed back by the encoder 4. The actual speed ωm is compared to obtain the speed difference of the control signal. Through the speed loop PI regulator, the torque command that needs to be adjusted is output for speed regulation unt...

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Abstract

The invention discloses a driving motor speed regulator optimization method used in electric vehicle AMT gear changing. Cooperative work of a speed ring controller and an acceleration sensor is adopted in a speed ring PI regulator; an acceleration value a in current driving of a vehicle is obtained through the acceleration sensor; next, comparison between the acceleration value a output by the acceleration sensor and a preset acceleration threshold value K is performed; when the acceleration value a is less than or equal to the acceleration threshold value K, the output of the speed ring PI regulator is not adjusted, equivalently, the proportional element of the speed ring is output as normal; and when the acceleration value a is greater than the acceleration threshold value K, the proportional element output value is subjected to amplitude limiting by the integral element output value of the speed ring. By virtue of the driving motor speed regulator optimization method, the acting intensity of the proportional element can be lowered according to the current acceleration condition in vehicle gear changing, so that overshoot of a rotary speed ring is suppressed effectively, and a quick, accurate and smooth gear changing experience can be realized.

Description

technical field [0001] The invention belongs to the technical field of new energy vehicles, and in particular relates to an optimization method for a drive motor speed regulator under AMT shifting of an electric vehicle. Background technique [0002] When the electric vehicle is running, the TCU (Transmission Control Unit) sends out a gear shift signal in the current state according to the driver's intention. At this time, the motor speed must reach the speed value of the next gear in a short time in order to successfully control the AMT ( Automated Mechanical Transmission) to complete the shift, otherwise the shift fails. This requires speed closed-loop control. The existing algorithm is generally the PI algorithm commonly used in the industry. Its disadvantage is that when shifting gears, the output of the proportional link of the speed loop is too large, resulting in overshooting of the speed, and the speed difference when shifting is too large. It causes the internal te...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P23/00H02P23/20
CPCH02P23/0004H02P23/20H02P2205/07
Inventor 沈天珉张浩阳宇黄庆
Owner 四川芯智热控技术有限公司
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