河南理工大学学报（自然科学版）2025，Vol.44Issue(2)：116-127,12.DOI:10.16186/j.cnki.1673-9787.2023030061
基于双级PNN的直驱永磁同步电机匝间短路故障诊断方法
Interturn short circuit fault diagnosis method of direct-drive permanent magnet synchronous motor based on two-stage PNN
摘要
Abstract
Objectives Accurate positioning of early faults is crucial for preventing the deterioration of motor system faults and formulating operation and maintenance strategies after faults.Methods Aiming at the prob-lem that the inter-turn short-circuit fault diagnosis of multi-branch parallel direct-drive permanent magnet synchronous motor(MB-DDPMSM),a novel method of inter-turn short-circuit fault detection and short-circuit coil automatic positioning based on two-stage PNN was proposed.Firstly,according to the special structural characteristics of MB-DDPMSM,the branch difference current(BDC)was selected as the fault branch location characteristic signal,the branch current residual(BRC)was selected as the short-circuit coil location characteristic signal.Secondly,the finite element model of MB-DDPMSM inter-turn short cir-cuit fault state was established,the MB-DDPMSM finite element model was used to analyze the influence of short-circuit coil position on the characteristic signal,and the mapping relationship between BDC and fault branch position,BRC and short-circuit coil position was established.Then,in order to eliminate the influence of fault degree on the characteristic signals and enhance the fault characteristics,the extracted BDC amplitude was normalized by L2 norm to obtain the fault branch location feature vector.The extracted BRC amplitude was normalized by Z-Score to obtain the short-circuit coil positioning feature vector.Fi-nally,a fault diagnosis model based on two-stage PNN was established.The first-stage PNN was used to re-alize inter-turn short-circuit fault detection and fault branch location,and the second-stage PNN was used to realize short-circuit coil automatic location.Results The simulation and experimental results showed that the proposed method could detect the early inter-turn short-circuit fault in time and realize the accurate po-sitioning of the short-circuit coil,and the recognition accuracy was as high as 100%.Conclusions The inter-turn short circuit fault diagnosis model based on two-stage PNN had the advantages of simple model-ing,fast convergence speed and high fault diagnosis accuracy.关键词
直驱永磁同步电机/匝间短路故障/支路差值电流/支路电流残差/双级PNN/短路线圈定位Key words
direct-drive permanent magnet synchronous motor/interturn short-circuit fault/branch differen-tial current/branch residual current/two-stage PNN/fault coil location分类
信息技术与安全科学引用本文复制引用
高彩霞,冯凌云,党建军..基于双级PNN的直驱永磁同步电机匝间短路故障诊断方法[J].河南理工大学学报（自然科学版）,2025,44(2):116-127,12.基金项目
国家自然科学基金资助项目(52177039) （52177039）
河南省科技攻关项目(222102220017) （222102220017）
河南理工大学博士基金资助项目(B2021-22,B2018-48) （B2021-22,B2018-48）
河南理工大学创新团队项目(T2023-2) （T2023-2）
河南省高校基本科研业务费专项项目(NSFRF240306) （NSFRF240306）
