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Low-speed jitter control method and device for blade electric vehicle, and blade electric vehicle

A pure electric vehicle, low-speed technology, applied in the field of low-speed jitter control, pure electric vehicles, to reduce negative effects, improve riding experience, and solve low-frequency jitter problems

Inactive Publication Date: 2017-05-31
BEIJING ELECTRIC VEHICLE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Embodiments of the present invention provide a low-speed jitter control method and device for a pure electric vehicle, and a pure electric vehicle. The low-speed jitter is controlled by controlling the rotation speed of the motor output shaft of the pure electric vehicle to solve the low-speed jitter problem of the pure electric vehicle. So as to improve the driving experience of drivers and passengers

Method used

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  • Low-speed jitter control method and device for blade electric vehicle, and blade electric vehicle
  • Low-speed jitter control method and device for blade electric vehicle, and blade electric vehicle
  • Low-speed jitter control method and device for blade electric vehicle, and blade electric vehicle

Examples

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no. 1 example

[0050] Embodiments of the present invention provide a low-speed vibration control method for pure electric vehicles, such as image 3 As shown, the method includes:

[0051] Step 301: Obtain the rotation speed of the motor output shaft of the pure electric vehicle, and judge whether the pure electric vehicle has low-speed vibration according to the rotation speed of the motor output shaft.

[0052] Among them, the lower the frequency of the motor of the pure electric vehicle, the lower the speed of the output shaft of the motor. Therefore, the low-speed dithering can also be called low-frequency dithering.

[0053] In addition, when the pure electric vehicle shakes at low speed, the speed of the output shaft of the motor jumps. Therefore, in the embodiment of the present invention, it is judged whether low-speed vibration occurs in the pure electric vehicle by monitoring the rotation speed of the output shaft of the motor in real time.

[0054] Further, step 301 includes: ...

no. 2 example

[0074] An embodiment of the present invention provides a low-speed jitter control device for a pure electric vehicle. Preferably, the low-speed jitter control device for a pure electric vehicle may specifically be a motor controller.

[0075] Such as Figure 4 As shown, the low-speed vibration control device 400 of the pure electric vehicle includes:

[0076] The shake judging module 401 is used to obtain the speed of the motor output shaft of the pure electric vehicle, and judge whether the pure electric car has low-speed shake according to the speed of the motor output shaft;

[0077] The vibration control module 402 is configured to control the rotation speed of the output shaft of the motor to maintain within a preset range when the pure electric vehicle vibrates at a low speed.

[0078] Preferably, as Figure 5 As shown, the shake judgment module 401 includes:

[0079] The rotation speed acquisition unit 4011 is used to acquire the rotation speed of the motor output sh...

no. 3 example

[0094] An embodiment of the present invention provides a pure electric vehicle, including the above-mentioned low-speed jitter control device for a pure electric vehicle.

[0095] Therefore, in the pure electric vehicle of the embodiment of the present invention, by monitoring the speed of the motor output shaft in real time to determine whether the pure electric vehicle has low-speed jitter, and then control the speed of the motor output shaft to remain within the preset range when low-speed jitter occurs, that is, to adjust The speed of the output shaft of the motor eliminates its jumps, thereby solving the low-frequency vibration problem of pure electric vehicles, reducing the negative impact of low-speed vibration of the whole vehicle, and improving the riding experience of drivers and passengers.

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Abstract

The invention provides a low-speed jitter control method and a low-speed jitter control device for a blade electric vehicle, and the blade electric vehicle. The method comprises the steps of acquiring the rotation speed of a motor output shaft of the blade electric vehicle, and judging whether the blade electric vehicle jitters at low speed according to the rotation shaft of the motor output shaft; and when the blade electric vehicle jitters at the low speed, controlling the rotation speed of the motor output shaft is maintained within a preset range. Therefore, according to the scheme of the method and the device provided by the invention, low speed jitter is controlled by controlling the rotation speed of the motor output shaft of the blade electric vehicle, the problem of low speed jitter of the blade electric vehicle is solved, and riding experience of drivers and passengers is enhanced.

Description

technical field [0001] The invention relates to the field of vehicle control, in particular to a low-speed vibration control method and device for a pure electric vehicle and the pure electric vehicle. Background technique [0002] The driving system of pure electric vehicles such as figure 1 shown. The transmission system is mainly composed of a motor, a reducer and a transmission shaft 1. Among them, due to the elastic deformation of the transmission system components (transmission shaft 1, reducer), including the torsional elastic deformation of the output shaft of the driving motor, the torsional deformation of the drive shaft, etc., the elastic resonance of the transmission system will occur. [0003] In addition, the pure electric vehicle drive train model such as figure 2 shown. The output shaft of the motor is connected to the speed reducer 2, then to the transmission shaft 1, and finally to the tire 4, which is the power output path of the electric vehicle. Wh...

Claims

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Application Information

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IPC IPC(8): B60L15/28
CPCB60L15/28B60L2240/421Y02T10/72
Inventor 孙迎禹苏伟蒋荣勋刘玉辉
Owner BEIJING ELECTRIC VEHICLE
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