通过电流信号技术诊断三相永磁同步电机中的电源开关故障

IF 2.2 3区 工程技术 Q2 ENGINEERING, MECHANICAL
Actuators Pub Date : 2024-01-08 DOI:10.3390/act13010025
A. Suti, G. Di Rito
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引用次数: 0

摘要

本文介绍了一种基于模型的电流信号算法,用于检测和隔离三相永磁同步电机(PMSM)中的电源开关故障。该算法通过详细说明电机电流反馈,通过椭圆配件重建克拉平面上的电流相位轨迹,直至根据与标称信号偏差的特征检测和隔离故障。根据文献中的典型建议,作为一个粗略的近似值,六个电源开关中的一个出现故障意味着,在恒速运行时,相位轨迹会偏离标称的圆形路径,形成半圆形的 "D 型 "特征,其倾斜度取决于发生故障的变流器支路。然而,在实际情况下,由于电机相位连接从故障开关过渡到有源开关的动态变化,这种演变会出现明显偏差。研究表明,通过将椭圆中心与故障开关的位置相关联,对电流特征进行在线椭圆拟合可以有效地进行诊断。本文通过对用于推进轻型固定翼无人机 (UAV) 的 PMSM 进行非线性仿真,对故障潜伏期和相关瞬态进行量化,从而评估所提出的监控技术的性能。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Diagnosis of Power Switch Faults in Three-Phase Permanent Magnet Synchronous Motors via Current-Signature Technique
The paper deals with the development of a model-based current-signature algorithm for the detection and isolation of power switch faults in three-phase Permanent Magnet Synchronous Motors (PMSMs). The algorithm, by elaborating the motor currents feedbacks, reconstructs the current phasor trajectories in the Clarke plane through elliptical fittings, up to detecting and isolating the fault depending on the characteristics of the signature deviation from the nominal one. As a rough approximation, as typically proposed in the literature, the fault of one out of six power switches implies that, at constant speed operation, the phasor trajectory deviates from the nominal circular path up to a semi-circular “D-shape” signature, the inclination of which depends on the failed converter leg. However, this evolution can significantly deviate in practical cases, due to the dynamics related to the transition of motor phase connections from failed to active switches. The study demonstrates that an online ellipse fitting of the current signature can be effective for diagnosis, through correlating the ellipse centre to the location of the failed switch. The performances of the proposed monitoring technique are here assessed via the nonlinear simulation of a PMSM employed for the propulsion of a lightweight fixed-wing Unmanned Aerial Vehicle (UAV), by quantifying the fault latencies and the related transients.
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来源期刊
Actuators
Actuators Mathematics-Control and Optimization
CiteScore
3.90
自引率
15.40%
发文量
315
审稿时长
11 weeks
期刊介绍: Actuators (ISSN 2076-0825; CODEN: ACTUC3) is an international open access journal on the science and technology of actuators and control systems published quarterly online by MDPI.
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