Hybrid optoelectronic encoder installation error compensation value determination system and method

Abstract

The invention relates to a hybrid optoelectronic encoder installation error compensation value determination system and method. The system comprises a microprocessor, a Hall current sensor, an A/D conversion circuit module, a current signal conditioning circuit and a three-phase power driver for driving a servo motor provided with a hybrid optoelectronic encoder. The method includes the following steps that: firstly, direct-current bus-bar current signals are acquired and processed when an installation error compensation value is zero; secondly, direct-current bus-bar current signals are acquired and processed when the installation error compensation value is an installation error compensation minimum angle; thirdly, X and Y are compared with each other according to conditions, and the installation error compensation value of the hybrid optoelectronic encoder is adjusted; and fourthly, the installation error compensation value of the hybrid optoelectronic encoder is determined. The hybrid optoelectronic encoder installation error compensation value determination system and method of the invention have the advantages of reasonable design, convenient implementation, low cost, convenient use and operation, high adaptability, high practicability and excellent use effects, and do not need to consume too many manpower and material resources, and are suitable for being popularized.

Description

technical field [0001] The invention belongs to the technical field of encoder installation position error correction, and in particular relates to a system and method for determining an installation error compensation value of a hybrid photoelectric encoder. Background technique [0002] In the field of servo motor control, in order to accurately control the position or speed and improve the control performance of the servo motor, it is often necessary to know the initial position of the rotor and the position and speed information during operation, which can be obtained by installing a rotor position sensor. Among them, the hybrid photoelectric encoder combines the advantages of the absolute position photoelectric encoder and the incremental position photoelectric encoder. It provides both low-resolution absolute position information and high-resolution incremental pulse signals. The price is moderate, so It is widely used in various fields of servo motors that require ini...

AI Technical Summary

Problems solved by technology

However, like other types of sensors, the assembly error of the hybrid photoelectric encoder during installation will cause an error between the actual rotor position of the servo motor and the rotor position detected by the hybrid photoelectric encoder. The existence of this detection error It will cause unexpected and uncontrollable direct-axis current, which will affect the accuracy of the start-up and operation control of the servo motor, reduce the efficiency of the control system, and cause the servo motor to fail to start or reverse in severe cases

[0003] At present, the detection of the installation position of the hybrid photoelectric encoder usually adopts the method of manual repeated experiments, and the installation position of the hybrid photoelectric encoder is adjusted until the accuracy requirements are met. The detection cost is high, the efficiency is low, and the manpower and material resources are high.

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