永磁无刷直流电动机换向过程分析  

Analysis on Commutation for Permanent Magnet Brushless DC Motor

作　　者：刘和平[1] 刘平[1] 王贵[1] 

机构地区：[1]重庆大学电气工程学院输配电装备及系统安全与新技术国家重点实验室,重庆400044

出　　处：《微电机》2008年第10期10-13,共4页Micromotors

摘　　要：永磁无刷直流电机无论是带位置传感器和无位置传感器控制,都涉及到换向的电磁过程。以BLDC工作在三相星型六状态模式为基础,详细讨论了驱动系统的三种换向情况,即换向正常、换向超前和换向滞后,并分别给出了几种换向情况下包含转子位置检测误差的相电流的解析表达式。以大功率永磁无刷直流电机为实例进行了仿真与样机试验验证,得到了三种换向情况下电动机相电流的仿真和试验结果。结果表明换向理论分析是正确的。The control method of permanent magnet brushless DC motor both with position sensor or sensorless involved a serious problem of phase commutation electromagnetic process. By discussing the electromagnetic process of phase commutation for brushless DC motor with three-phase Y-connected windings in six-state operate mode, three kinds of commutation instances of brushless DC motor drives, the correcting commutation, the delaying commutation and the leading commutation, discussed in detail in the paper. The analytical expression of under these commutation instances. the phase current including rotor Using a high power brushless DC rent waveform of three kinds of commutation instances was shoed position detection error was givqen motor as an example, phase curthrough computer simulation and real experiment. The results showed that the theoretical analysis of commutation war correct.

关 键 词：永磁无刷直流电动机 转子位置检测 换向分析 电磁过程 

分 类 号：TM361[电气工程—电机]