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Control method for reducing output torque vibration of motor for electric vehicle

A technology of output torque and control method, applied in the control field of reducing output torque vibration of electric vehicle motor

Active Publication Date: 2020-08-28
深蓝汽车科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the output torque vibration control compensation coefficient of the motor is only for fixed working conditions. When the driving conditions of the vehicle change, the single-dimensional torque vibration control compensation coefficient cannot better meet the driving comfort requirements of the vehicle under complex working conditions.

Method used

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  • Control method for reducing output torque vibration of motor for electric vehicle

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Embodiment Construction

[0033] The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0034] see figure 1 As shown, this embodiment discloses a control method for reducing output torque vibration of an electric vehicle motor, including the following steps:

[0035] (S1) According to the different motor speed segments under each working condition of the vehicle, calibrate and optimize the motor speed high-frequency noise filter coefficient, the motor speed undesired noise filter coefficient and the motor anti-torsional vibration torque compensation coefficient used to suppress torque vibration, and Formulate the motor speed high-frequency noise filter coefficient table, the motor speed undesired noise filter coefficient table and the motor anti-torsional vibration torque compensation coefficient table;

[0036] (S2) Identify the actual working condition of the vehicle at the current moment.

[0037] (S3) Determine whether th...

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Abstract

The invention discloses a control method for reducing output torque vibration of a motor for an electric vehicle. According to the corresponding vehicle and motor input signals, a corresponding algorithm is constructed to accurately judge the actual working condition of the vehicle; proper filtering coefficients and torque compensation coefficients are selected by looking up a table, and the torsional vibration of the motor is suppressed by calculating compensation torque according to the motor rotating speed difference obtained before and after RC filtering through the torsional vibration prevention RC filtering coefficients and the torque compensation coefficients of all the rotating speed sections of the motor under different working conditions. By means of the method, the requirement for smoother and safer driving of the whole vehicle can be met.

Description

technical field [0001] The invention relates to the technical field of automobile driving control, in particular to a control method for reducing output torque vibration of an electric vehicle motor. Background technique [0002] Permanent magnet synchronous motors have been widely used in electric vehicles due to their advantages of high energy density and high efficiency. Under non-stable working conditions such as dynamics, the transmission system is excited to vibrate by random impact disturbances, resulting in unexpected dynamic loads that cause torsional vibrations, which directly affect the ride comfort of the vehicle and the reliability and durability of the drive train components. Therefore, it is necessary to develop a torque ripple suppression function to eliminate the impact of unexpected dynamic loads during electric vehicle driving and improve the service life of drive train components. The existing motor output torque vibration control is to match the actual ...

Claims

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Application Information

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IPC IPC(8): B60L15/20
CPCB60L15/20B60L2240/421B60L2240/423Y02T10/72
Inventor 彭志远杜长虹陈健周安健金国庆周洪波马永泉刘永刚
Owner 深蓝汽车科技有限公司