Method for feeding back initial absolute position of motor, apparatus and encoder frequency-dividing apparatus

Abstract

The invention discloses a method for feeding back the initial absolute position of a motor, an apparatus and an encoder frequency-dividing apparatus. The method for feeding back the initial absolute position of the motor comprises the steps of 1) converting the value of the initial absolute position of a motor from the binary form to the decimal form, and generating pulse waves (PWM) of a corresponding number according to the decimal data; 2) counting the pulse number of the pulse waves, and generating each pulse of a pulse A and a pulse B according to the coding of the counting information; 3) transmitting the pulse A and the pulse B to the controller of the motor, and parsing the information of the pulse number of the pulse waves (PWM) to obtain the initial absolute position information of the motor. According to the technical scheme of the method for feeding back the initial absolute position of the motor, the initial absolute position information of the motor is converted into the information of the pulse A and the pulse B to be fed back and transmitted. Therefore, no special protocol-based transmission process adopted in the prior art is required. Therefore, the overall implementation cost is low and the technical scheme is wide in adaptability.

Description

【Technical field】 [0001] The invention relates to the field of motor control, in particular to a method and device for feedbacking the absolute position of a motor and an encoder frequency dividing device. 【Background technique】 [0002] The servo driver is connected with the control system, and the absolute position of the motor is fed back to the control system. Feedback involves the transmission of the initial absolute position P0 after power-on and the subsequent incremental absolute position △P. After the initial absolute position P0 and the subsequent incremental position △P are obtained in the control system, the absolute position of the motor can be calculated. [0003] The schematic diagram of the existing absolute position feedback method is as follows: figure 1 As shown, it includes two parts: (1) Transmission of incremental position information △P: After the incremental position information is processed by the encoder frequency division module such as CPLD / FPGA...

AI Technical Summary

Problems solved by technology

In this absolute position feedback method, two transmission processes are involved, the scheme is relatively complicated, and the implementation cost is high, and when the initial absolute position P0 is acquired by protocol, it is necessary for the servo drive and the controller to adopt a unified protocol standard, so the feedback can be realized. The choice of means of the method is relatively limited

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