摘要
对航空直流起动发电机的电枢电流波形进行频谱分析可有效地对电机的故障进行检测和诊断 .由于电机在运行时其转速是变化的 ,而电枢电流的纹波信号与电机转速成正比 ,若对电流进行定时采样 ,则其频谱会散布在很宽的频率范围内 ,使频谱特征模糊化 ,难于利用频谱特征进行故障检测和诊断 .采用与转速同步的电流采样方法 ,得到的频谱称为“阶比谱” ,在阶比谱上 ,频谱成分是单一的 ,因此容易用它来进行故障检测和诊断 .文中对起动发电机进行了实验 ,对线圈短路、绕组元件与换向片开焊。
Faults in aero-starter-generator could be detected and diagnosed by analyzing the spectrum of motor armature current could be effectively detected and diagnosed. Because rotation speed is fluctuating during the operation of the motor and the ripple of current is proportional to the speed fluctuation, if the sampling period of current is constant, the spectrum of current would spread over a wide range. The fuzziness of spectrum characteristics made fault detection and isolation difficult. While using sampling which is synchronized with the rotation speed this problem could be solved based on analysis of the resulted order ratio spectrum. Experiment on fault detection and isolation is conducted. Four faults (broken coil, broken connection between coil and commutator, short circuit between two neighboring conductors and eccentricity of rotor) can be detected and isolated by the proposed method.
出处
《北京航空航天大学学报》
EI
CAS
CSCD
北大核心
2004年第5期483-487,共5页
Journal of Beijing University of Aeronautics and Astronautics
基金
航空基础科学基金资助项目 ( 0 0 15 10 19)
国家自然科学基金资助项目 ( 60 2 3 40 10 )
关键词
故障检测
故障诊断
航空起动发电机
频谱分析
Diagnosis
Electric generators
Error detection
Motors
Spectrum analysis
Synchronization
