Differential velocity control method for wheel side motor

A wheel-side motor and control method technology, applied in the direction of motors, control drives, control devices, etc., can solve the problems of shortening tire life, large tire resistance, and tires that cannot be used for a long time, so as to avoid eating tires and improve tire life. Effect

Active Publication Date: 2018-11-09
ANHUI ANKAI AUTOMOBILE
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AI Technical Summary

Problems solved by technology

[0007] In order to solve the phenomenon that the wheel motor does not have a differential, and the car will eat tires when turning, the present invention provides a method for controlling the differential speed of the wheel motor, because when the vehicle is turning, the speeds of the wheels on both sides are different. However, if the same torque is allocated to both motors, the internal tires will be subjected to too much resistance, which will cause the phenomenon of tire eating for a long time, resulting in the tires not being able to be used for a long time and greatly shortening the life of the tires.

Method used

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  • Differential velocity control method for wheel side motor

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Embodiment Construction

[0018] The technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments. Apparently, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0019] A wheel-side motor differential speed control device, such as figure 1 As shown, including torque sensor, wheel motor, motor controller, differential speed controller and vehicle controller;

[0020] The two torque sensors are respectively installed on the drive shafts of the left and right wheel motors, and are connected to the differential speed controller through signal lines;

[0021] The left and right wheel side motors are respectively connected to a motor controller through a resolver; the left and right moto...

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Abstract

The invention discloses a differential velocity control method for a wheel side motor. The method comprises the following steps: two torque transducers are mounted on transmission shafts of left and right wheel side motors, and signals are transmitted to a differential velocity controller in time; the wheel side motors are controlled by motor controllers, the motor controllers establish CAN communication with the differential velocity controller, the motor controllers receive torque commands of the left and right wheel side motors issued by the differential velocity controller, and the motor controllers uploads rotating speed of the left and right wheel side motors to the differential velocity controller; and the differential velocity controller establishes the CAN communication with a vehicle controller, the differential velocity controller receives total torque commands sent by the vehicle controller, and torque is recalculated and sent to the left and right motor controllers to control motor rotating torque. Through cooperation among the torque transducers, the motor controllers, the differential velocity controller and the vehicle controller, torque control of the wheel-side motors is achieved, the phenomenon of tyre wear for a long time is avoided, and the service life of a tyre is prolonged.

Description

technical field [0001] The invention relates to the technical field of pure electric passenger cars, in particular to a method for differential speed control of wheel side motors. Background technique [0002] In February 2017, the National Development and Reform Commission, together with the Ministry of Science and Technology, the Ministry of Industry and Information Technology, and the Ministry of Finance, organized the compilation and release of the "Guiding Catalog of Key Products and Services for Strategic Emerging Industries (2016 Edition)" (abbreviation: "Catalogue"). Among them, among the products that involve the key cultivation of new energy vehicles, wheel motors are impressively listed. [0003] In recent years, the wheel-side motor drive technology has been generally favored by the industry. Many bus companies have accumulated strength and developed a variety of wheel-side motor drive products. It is understood that with the increasing demand for lightweight el...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60L15/20
CPCB60L15/2036B60L2240/421B60L2240/423Y02T10/64Y02T10/72Y02T90/16
Inventor 朱元庆李韧袁明
Owner ANHUI ANKAI AUTOMOBILE
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