Method for identifying DC brush-less motor winding direction by utilizing electric vehicle controller

Abstract

The invention relates to a control method belonging to the field of electric vehicle controllers, which aims at overcoming the defects of the prior art, is a method for identifying the DC brush-less motor winding direction, and can realize anti-theft function of electric vehicles. The method comprises a motor hall signal detection step, a motor phase identification step and a winding direction determining step, and the winding direction determining step comprises the following steps of: firstly sequentially carrying out positive and reverse electrifying operations on motor windings by utilizing a power tube of the electric vehicle controller, then sampling winding current values when carrying out positive and reverse electrifying operations, and at last comparing the winding current values during the positive and reverse electrifying operations to obtain the motor winding direction. The invention has the advantages of automatic identification of the motor winding direction, high reliability and high response speed, can completely substitute a common method of hardware setting to set the motor winding direction for the motor controller, does not need human intervention completely, and effectively avoids accidents of vehicle flying caused by improper settings.

Description

Technical field [0001] The invention belongs to a control method in the field of electric vehicle control equipment, and is particularly applied to a method for identifying the winding direction of a DC brushless motor by using an electric vehicle controller Background technique [0002] At present, electric vehicles that use electricity as a source of power are increasingly favored by consumers in the market due to their environmental protection, simplicity and practicality. The central control part of electric vehicles, the technology of electric controllers, is also changing day by day. It is common in the market to prevent theft. The anti-theft principle of a functional electric bicycle controller is to lock the motor without being stolen. However, the conventional method of the existing anti-theft technology is: the anti-theft motor lock function must be accurately determined in advance to achieve the motor winding direction; if Inputting the wrong winding direction informat...

AI Technical Summary

Problems solved by technology

This method not only needs to occupy the I / O resources of the single-chip microcomputer, but also needs to be controlled by an external connector outside the electric vehicle controller. If the quality of the external connector is unstable or the relevant personnel do not operate properly, the wrong winding direction information is input, causing Accidents caused by speeding cars will greatly increase potential safety hazards

[0003] The problem of determining the direction of the motor winding in the prior art is a difficult technical problem, which directly limits the simple and efficient realization of the electric vehicle anti-theft function by the electric vehicle controller, and becomes the key factor affecting the overall technical improvement of the electric vehicle industry technical flaw

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