摘要：本文主要研究无位置传感器无刷直流电机控制方法，在综合考虑调整时间、超调量、调速范围、以及抗扰动能力等的基础上，提出了改进的模糊与PI控制并行的控制方式，即在大误差下采用PI控制，而小误差下采用模糊控制。并对PI控制进行了分段限幅的改进，使得在电机的起动阶段，可以非常明显的改善调整时间与超调量，使系统具有很好的快速性和稳定性。通过Matlab对比仿真，验证了此设计方法的优越性。

关键词：无刷直流电机；无位置传感器；改进的模糊PI控制；分段控制
Abstract: This paper mainly studied control method of brushless DC motor without position sensor Comprehensively considering the adjustment time, overshoot, speed range, and resistance to disturbance, the improved parallel fuzzy PI control was designedThat is,when the error is large, the PI control is used, while the error is small, the fuzzy control is usedBesides, PI section limiter was added for improvementsWhen the machine starts up, the adjusting time and the over adjusting waveform will be better,so the fast and stable quality of the system can be betterBy contrasting matlab simulating,the superiority of this design was verified

Key words: brushless DC motor; no position sensor; improved fuzzy PI control; segmented control