无换向器电机全程式转子电气位置检测方法的分析与实现  

Analysis and Realization of Whole Process Electric Rotor Position Detector of a Commutatorless Motor

作　　者：杜海江[1] 石新春[2] 

机构地区：[1]华北电力大学网管中心,保定071003 [2]华北电力大学电气工程学院,保定071003

出　　处：《电工技术学报》2005年第5期80-86,共7页Transactions of China Electrotechnical Society

摘　　要：无换向器电机的转子位置检测器是一个关键部件,也是一个薄弱环节。为了摆脱对机械位置检测器的依赖,研制从静止状态到额定转速的全程转子电气位置检测器非常必要。由于电机端电压和频率变化范围非常大、波形畸变严重,这一问题始终没有解决。经过对电压波形的细致分析,本文首先将电机运行过程分为五个阶段,然后设计了限幅采样电路、多种滤波算法和位置检测策略,最后采用内置高速A/D功能的微控制器芯片设计并实现了全程转子电气位置检测器,并在一台1kV、380kW的无换向器电机上进行了验证。Rotor position detector is a key component and is also a weakest link in a commutatorless motor. In order to simplify structure and improve reliability, it is necessary to develop whole process electric rotor position detector to operate from rest to rated speed. Because motor's terminal voltage vary greatly in frequency and amplitude and have serious wave distortion, this problem has not been solved completely. By detailed analysis of voltages waves, rotor running process is divided into five stages, then clip sampling circuit, several kinds of filter algorithms and two kinds of position detection strategies are designed in this paper. The clip sampling circuit can keep the input signals not to be weakened during motor starting period and avoid high voltages hurting inner circuit during high speed. Filter algorithms include IIR digital filter, mean value filter and maximum probability filter, which are used during different motor running stages. Two strategies of position detection are three-phase correlative algorithm and three-phase irrelative algorithm. The whole process electric rotor position detector is achieved by using a high speed MCU with A/D unit and is tested on a commutatorless motor.

关 键 词：无换向器电机 电气位置检测 三相相关法 数字滤波器 

分 类 号：TM341[电气工程—电机]