Motor rotating speed filtering method for pure electric vehicle

Abstract

The invention discloses a motor rotating speed filtering method of a pure electric vehicle. The method comprises the following steps: 1) collecting vehicle gradient information; 2) collecting motor rotating speed information, and setting a communication period as t; 3) judging whether the actual motor rotating speed value is smaller than the theoretical motor rotating speed value; 4) if yes, executing a filtering program and turning to step 5), otherwise, not executing the filtering program and turning to the step 3); 5) calculating a motor speed change rate limit value; 6) judging whether the absolute value of the actual value of the rotating speed of the motor relative to the added value delta MotorSpeed of the actual value of the rotating speed of the motor recorded last time is greater than t* KMotorSpeed or not, if yes, determining that the rotating speed is suddenly changed, adjusting the motor rotating speed control value to be equal to the sum of the motor rotating speed actual value MotorSpedt-1 recorded last time and t * KMotorSpeed, if not, considering that the rotating speed is not suddenly changed, and adjusting the rotating speed control value of the motor to be equal to the actual rotating speed value MotorSpeedt of the motor; and (7) repeating the steps 3) to 6) until the vehicle control unit sends a stop instruction. The method has the advantages of easiness in implementation, low cost, good effect and the like.

Description

technical field [0001] The invention relates to the technical field of pure electric vehicle control, in particular to a motor speed filtering method of a pure electric vehicle. Background technique [0002] With the increasingly serious problem of environmental pollution and the depletion of oil resources, people are generally concerned about clean energy. In the field of automobiles, especially pure electric vehicles, they are promoted and supported by governments of various countries. Our government has also issued a series of subsidy policies to promote new technologies. Development of energy vehicle industry. With the gradual popularization of pure electric vehicles in recent years, people have higher and higher requirements for pure electric vehicles, including quietness, comfort, handling, etc. [0003] In order to achieve good comfort and handling of pure electric vehicles, the target torque sent by the vehicle controller to the motor controller is very important. T...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a motor speed filtering method for pure electric vehicles, which solves the problem of vehicle vibration when the pure electric vehicle starts or switches between low-speed driving and braking modes by filtering the motor speed

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