A method for generating zero-point pulses in an absolute encoder

By calculating the real-time speed and position difference of the absolute encoder and dynamically adjusting the zero-point pulse width, the problem of the zero-point pulse width not matching the motor speed in the existing technology is solved, achieving higher precision encoder control and reducing costs.

CN114499473BActive Publication Date: 2026-04-03WEIKEDA (DONGGUAN) INTELLIGENT CONTROL CO LTD
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Patent Information

Application Number
CN202111342326.9
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2021-11-12
Publication Date
2026-04-03
Estimated Expiration
2041-11-12

AI Technical Summary

Technical Problem

In existing technologies, the zero-point pulse width generated by absolute encoders is custom-defined and cannot be matched to the real-time speed of the motor, resulting in large errors.

Method used

By calculating the real-time speed and position difference of the absolute encoder, the zero-point pulse width is dynamically adjusted to generate a zero-point pulse that matches the real-time speed of the motor. The relevant register values ​​are then calculated and stored using an FPGA.

Benefits of technology

It reduces the error in zero-point pulse generation, improves the accuracy of the encoder, and is applicable to various types of absolute encoders, thus reducing the cost of use.

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Abstract

This invention relates to the field of encoder application technology in servo control systems, and in particular to a method for generating zero-point pulses for absolute encoders. Based on the desired number of pulses per revolution, the method can flexibly generate corresponding zero-point pulse widths according to the real-time speed of the absolute encoder, significantly reducing usage errors compared to traditional fixed zero-point widths. Furthermore, this invention is applicable to various types of absolute encoders; simply changing the absolute encoder resolution r and communication period t to the information of the current absolute encoder allows for its application, resulting in strong compatibility and reduced usage costs.
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