The thesis realizes the control exciting winding method and the best exciting in towards polarity method provided in this thesis with singlechip ( at90s8535 ) and scr hardware . it proves these methods are accurate and available through the control exciting winding test . analyzing the stator current and exciting current test curves on a salient - pole synchronous motor with 2kw - 4 poles , it solves the starting - difficulty of salient - pole synchronous motors , and improves motors " starting capability 通过在一台2kw 、 4极凸极同步电动机上进行异步起动试验和分析试验过程中的励磁绕组电流和定子绕组电流的波形，证明了本文提出的励磁控制线路的正确性和可行性，较好地解决了凸极同步电动机起动难的问题，同时改善了电机的起动性能。
This article primarily introduces the structure of switched reluctance drive ( srd ) system and its development at home and abroad . the characteristic of switched reluctance motor ( srm ) and its electro - magnetics principle were described in details . the variation of srm winding current in different stage and the formula of toque and power were also analyzed in it 本文首先介绍了开关磁阻电机调速系统( srd )的构成及其在国际国内的发展状况，并对开关磁阻电动机的特点和电磁原理进行了阐述，分析了其绕组电流在不同阶段的变化情况以及转矩、功率公式。
The new instrument add a sensor that can gather the signal of the stator inductive current . and by analyzing the signal of the stator inductive current , judge the moving state of the electromotor . this instrument is mainly diagnosis the follow fault : the fragment of the bar in the rotor fault , the fault of eccentricity of the interspace between the rotor and the state of the electromotor . , 本仪器是在回转机械故障诊断与监测系统的基础上开发的，同时，根据电机这种特殊设备的实际情况，增加了电机电气信号的检测，即通过对电机定子三项绕组电流信号的变化分析，来找出电机的电气故障，主要是转子断条，气隙偏心故障以及定子等故障。
At different position and current , the normal force is calculated . this will be used to determine the force harmonics and hence to calculate the vibration resulting from the normal forces . the caculation results are very helpful to the reseach of noise and vibration of doubly salient motors 本文利用vfem对双凸极电机二维电磁性能进行分析，并对不同转子位置、不同绕组电流情况下的定转子径向磁吸力进行了详细计算，从而可以进一步研究径向力所引起的振动响应，这对于双凸极电机噪声和振动的研究有非常重要的实际意义。
