作　　者： ; ; ; ;

机构地区： 中国矿业大学信息与电气工程学院

出　　处： 《电机与控制学报》 2010年第10期61-67,共7页

摘　　要： 针对同步电机驱动系统中机械速度传感器可靠性差的问题,提出一种无传感器位置和速度观测方法,即转子侧注入高频信号的方法。在此基础上,给出两种方法实现了转子位置角和速度的观测。他们分别是:基于锁相环的跟踪技术;基于反正切函数的逻辑计算。仿真结果表明,两种方法可以很好地对位置角进行观测,动态特性好。但在速度观测方面,实际应用中还需提高其动态特性。同时,分析了注入高频信号的幅值和频率要求。通过改造电机模型进行仿真分析表明,考虑寄生电容后,定子侧高频信号的幅值降低了,但是并没有影响转子位置估计的精确度和准确性,最后通过样机实验验证了所提方法的正确性和准确性。 In order to solve the reliability problems of the mechanical speed sensor in synchronous motor drive system,a novel sensor-less method based on high frequency signal injection into the rotor to estimate rotor position and speed of wound field synchronous motor（WFSM） are presented.Two methods to observe rotor position and speed were given.That is： trace technique based on phase-locked loop（PLL）;logic computation based on arctan function.Simulation results show that these two methods are able to estimate rotor position well and have a good dynamic characteristic.However,in practical application,the characteristic of speed estimation needs to be enhanced.The amplitude and frequency requirement of the high frequency signal was analyzed.Simulation by rebuilding the motor model shows that,after considering parasitic capacitance,the amplitude of high frequency signal is decreased;however,there is no impact on accuracy of rotor position estimation.Experiment results show the accuracy and correctness of the method.

关 键 词： 高频信号注入 无传感器控制 电励磁同步电机 转子位置 锁相环技术

领　　域： [电气工程]