【摘要】 由于无刷励磁旋转整流器与转子一起旋转,整流器的故障无法得到直接的监测,但依据故障在定子励磁绕组中反映的特征来实现监测是一种有效的途径。为此,首先分析了正常运行及旋转整流器一管开路时多相无刷励磁机的电枢电流及其产生的电枢反应磁势,进而得到了2种运行状态下多相无刷励磁机定子电流谐波特性;最后对系统进行了仿真,通过谐波分析得到了励磁机定子电流的谐波特征,仿真结果与理论分析相符。该方法为分析旋转整流器不同运行状态对励磁机定子电流谐波特性的影响奠定了基础,可应用到对多相无刷励磁系统旋转整流器故障诊断的进一步研究中。更多还原

【Abstract】 Rectifier faults in brushless exciter systems are difficult to detect because the rectifier is rotating,while the harmonic characteristics of the stator field winding are more easily measured for fault detection.The fault characteristics of a rotating rectifier in a multi-phase brushless exciter system were determined by predicting the armature current and the magnetic motive force(MMF) for normal and open circuit faults of a single diode.The results were used to describe the harmonic characteristics of the exciter stator current.A system simulation was then also used to analyze the harmonics of the exciter stator current.The theoretical analysis agrees well with the simulation results to show that this method can be used to study the harmonic characteristics of the exciter stator current for various rotary rectifier faults for fault diagnosis of rotary rectifiers in multi-phase brushless exciter systems.更多还原