Intelligent Hall signal and winding corresponding relation recognition method for electric motor car

Abstract

The invention discloses an intelligent Hall signal and winding corresponding relation recognition method for an electric motor car. The method comprises the following steps: when a signal for intelligently recognizing the corresponding relation between a Hall signal and a winding is detected to be available, the electric motor car is controlled to start in a working mode without Hall position sensors; the electric motor car runs at a low speed with the 20% PWM (Pulse Width Modulation) duty cycle after normal start, and whether the Hall signal is normal or not is detected and judged; if yes, an array is defined to save 6 continuous Hall signals in different motor driving phase sequences; two arrays of the corresponding relation between the Hall signal and the winding in positive and negative rotation are defined and assigned a value, and the two obtained arrays are saved in an EEPROM (Electrically Erasable Programmable Read-Only Memory); and medium-speed operation of PWM with 40 percent of duty cycle is realized to mark the successful intelligent recognition of the corresponding relation between the Hall signal and the winding. The invention aims to provide the intelligent Hall signal and winding corresponding relation recognition method for the electric motor car, which can solve the problems that the motor shakes and the current is heavy during recognition.

Description

technical field [0001] The invention belongs to the field of electric vehicles, and in particular relates to a method for intelligently identifying the corresponding relationship between a Hall signal and a winding for an electric vehicle. Background technique [0002] As a new type of transportation, electric vehicles have the advantages of energy saving, environmental protection, low noise, moderate price, lightness and flexibility, and have been widely used. [0003] The motor of the electric vehicle is mainly a permanent magnet brushless DC motor, and the controller needs to control the inverter to commutate according to the signal of the Hall position sensor to drive the motor. There are 8 connecting wires between the motor and the controller, namely: 1 power supply, 1 ground wire, 3 Hall signal wires and 3 motor winding wires. Among them, the Hall signal wire and the motor winding wire must be connected according to a certain corresponding relationship. If the conne...

AI Technical Summary

Problems solved by technology

This method is not only time-consuming and labor-intensive, but also requires the experience of workers; the other is the automatic identification of the controller. This method first drives the motor according to the given corresponding relationship, and then judges whether the given signal and current are normal by detecting whether the Hall signal and current are normal. Whether the relationship is correct, if not, change another corresponding relationship to drive the motor until the correct corresponding relationship is found

This method may have problems such as motor jitter and high current during the identification process.

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