Development and Fault Prediction of a New Operating Mechanism of HTPPM

Hongkui Yan,Xin Lin,Jianyuan Xu

doi:10.1155/2021/6644091

Abstract

In this article, we take a 126 kV single-break vacuum circuit breaker as the research object and study the application of high-energy-density PM motor in the high-voltage circuit breaker for the first time. The PM motor maintains maximum power density and torque density during the start-up phase. Note that most of the faults of high-voltage circuit breakers are mechanical faults. We designed a set of mechanical fault prediction systems for high-voltage circuit breakers. We present the prediction method of the opening and closing action curve of the high-voltage circuit breaker. It is inspired by Chaos Ant Colony Algorithm (CAS) and an optimized Long- and Short-Term Memory (LSTM) cycle neural network. We constructed the main structure of the neural network expert system and established the fault prediction model of the high-voltage circuit breaker, based on the LSTM cycle neural network, optimized by CAS. We used the improved least-square method to achieve the operation accuracy of the phase control switch. Finally, we completed the development and experiment of the prototype.

Highlights

Most of the high-voltage circuit breaker motor operating mechanisms drive motor using a permanent magnet brushless DC motor
The current ripple caused by cogging torque, flux density distortion, and other factors leads to a larger torque ripple [4,5,6]. erefore, this type of motor will inevitably produce a torque ripple interference in the starting phase and achieve good results in the circuit breaker of lower voltage level
The advantages of a High-Torque and HighPower-density Permanent-magnet Motor (HTPPM) are high efficiency, high power density, and excellent control performance. ese advantages make the HTPPM useful in the field of high-performance drive. e main difference between HTPPM and other motors is the structure of the rotor magnetic circuit. e key to its design is the design of the rotor structure [7]

Summary

Introduction

Most of the high-voltage circuit breaker motor operating mechanisms drive motor using a permanent magnet brushless DC motor. Erefore, this type of motor will inevitably produce a torque ripple interference in the starting phase and achieve good results in the circuit breaker of lower voltage level. It is not suitable for the drive motor of a high-voltage circuit breaker In this regard, the advantages of a High-Torque and HighPower-density Permanent-magnet Motor (HTPPM) are high efficiency, high power density, and excellent control performance. E Operating Mechanism of the High-Power-Density Permanent-Magnet Motor. When the motor rotates at 57.1° in the closing operation, the moving contact is in the rigid closing position. When the motor rotates at 22.9° in the opening operation, the moving contact is in the rigid opening position

High-Power-Density PermanentMagnet Motor

Mechanical Properties of HTPPM

13.4 Yield force

Findings

Conclusions