Bus voltage protection circuit and servo system

By designing a bus voltage protection circuit and utilizing voltage sampling and hysteresis comparison units, reliable protection against bus voltage overvoltage is achieved, preventing false triggering and improving the stability and reliability of the system.

CN122246653APending Publication Date: 2026-06-19GUANGDONG TOPSTAR TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
GUANGDONG TOPSTAR TECH
Filing Date
2026-03-19
Publication Date
2026-06-19

AI Technical Summary

⚠Technical Problem

The reliability of bus voltage overvoltage protection in the existing technology is low, and it is prone to false triggering, which can lead to damage to electronic components.

⚗Method used

A bus voltage protection circuit was designed, including a voltage sampling module, a comparison output module, a discharge module, and a control output module. By setting two voltage thresholds and a hysteresis comparison unit, it is ensured that the discharge module is triggered only when the bus voltage is indeed overvoltage, thus avoiding false judgment.

🎯Benefits of technology

This improves the reliability of the bus voltage protection circuit, reduces the false trigger rate of overvoltage protection, and ensures stable system operation.

✦ Generated by Eureka AI based on patent content.

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Abstract

This invention discloses a bus voltage protection circuit and servo system. The protection circuit includes a voltage sampling module for generating a sampling voltage based on the bus voltage; a comparison output module connected to the voltage sampling module, which outputs an overvoltage signal when the sampling voltage exceeds a first voltage threshold; a discharge module connected between the positive and negative terminals of the bus; and a control output module connected to the outputs of the control module, the comparison output module, and the discharge module. The control output module controls the discharge module to conduct when it receives both the overvoltage signal and the discharge signal output by the control module, allowing the bus voltage to be discharged through the discharge module. The control output module only triggers the discharge module to conduct when it simultaneously receives both the discharge signal and the overvoltage signal, thus providing overvoltage protection for the bus and improving the reliability of the voltage protection.
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