【摘要】 无刷直流电机具有无机械换向器、过载能力强、转换效率高等优点,在电动车辆控制系统中越来越普及。然而,在实际应用时因电机旋转而产生的反电动势信号会给系统带来一些干扰,基于此,文章提出了三种解决信号干扰问题的方法。低通滤波的方式可以方便地将高频干扰信号滤除;采用光电耦合器进行信号隔离可以达到完全滤除杂波的效果;磁耦是一种新型的信号隔离器,较光耦有很大的优势。实验表明,使用新型的磁耦器件进行滤波,可以取得较为理想、实用的效果。更多还原

【Abstract】 The brushless DC is more and more popular in the electric vehicle control system,because it doesn’t need mechanical commutator and has strong overload capacity and high conversion efficiency.Then the signal interference problem is very important.This paper presents three methods to solve interference problems.Using the low-pass filter could easily filter out high frequency interference signals.The optocoupler can isolate the all interference signals.ICoupler digital isolator is a new signal isolator which has great advantages over the optocoupler.更多还原