无位置传感器无刷直流电机无硬件滤波转子位置检测方法  

Research of Rotor Position Detection for Sensorless BLDCM without Hardware Filter Circuit

作　　者：王大方[1] 于知杉 金毅[2] 朱洪彪 王明玉 

机构地区：[1]哈尔滨工业大学汽车工程学院,威海264209 [2]装甲兵工程学院,北京100072

出　　处：《电工技术学报》2017年第19期71-80,共10页Transactions of China Electrotechnical Society

基　　金：国家国际科技合作专项项目(2014DFB70120);国家自然科学基金项目(51305457);航天科学技术基金项目(2017-HT-HG-36);山东省科技发展计划项目(2014GGX105002);威海市科技发展计划项目(2014DXGJ02)资助

摘　　要：为了实现无硬件滤波电路下的无位置传感器无刷直流电机控制,针对其控制难点提出了一种利用芯片寄存器状态和换相电流续流时间的特性来避开PWM调制波形和换相时电流续流造成的尖峰电压干扰的转子位置检测方法。该方法对非导通相端电压进行定区间检测以及对换相时的续流噪声采取适当的延时操作来避开其干扰。该方法无需复杂的硬件滤波电路以及检测电路,无需复杂的软件算法,具有较高的实用性。最后通过实验验证了该方法在不同占空比和负载下控制结果的有效性。A rotor position detection method based on the state of chip＇s registers and the features of freewheeling time when motor is commutating was presented for the sensorless control system of Brushless DC（BLDC） motors with no hardware filter circuit. The interference of PWM switching noise and the noise of freewheeling can be avoided by detecting the effective range of non-conducting phase＇s terminal voltage and delaying an appropriate time to avoid the noise of freewheeling. The method does not need the complex hardware filter and detection circuit, and it also does not need the complex algorithms, so the method has advanced practicability. The theoretical derivation proves the correctness of the method, and the control results are given under different PWM duty cycles and loads in the experiment, which confirms the validity of the presented method.

关 键 词：无刷直流电机 无位置传感器 无硬件滤波 续流 转子位置 准确换相 

分 类 号：TM301[电气工程—电机]