摘要
首先介绍了无刷直流电机的基本模型和特性,对无位置传感器控制方式的基本原理进行研究。随后据此设计了一种分子泵用无位置传感器无刷直流电机控制系统,该系统采用反电势过零点检测方法获取转子位置信息,以进行换相逻辑控制,改进了电机的预定位及启动方式,降低了分子泵电机结构设计的复杂度,提高了分子泵的可靠性。接着从硬件设计和软件控制策略部分详细介绍了该控制系统。最后在实验平台上进行验证。使用所设计的控制器对分子泵进行驱动实验,结果表明,分子泵能够稳定启动并进入额定工作状态,分子泵额定转速可达90 000 r/min,且转速波动可稳定在±60 r/min内。
Firstly,this article introduces the basic model and characteristics of brushless DC motors and studies the basic principles of positioning sensor-less control methods.Then,a position sensor-less brushless DC motor control system for molecular pumps is designed based on this method.The system uses the zero crossing detection method of back electromotive force to obtain rotor position information to perform commutation logic contro.The design improves the predetermined position and start mode of the motor,reduces the complexity of the structural design of the molecular pump motor,and improves the its reliability.Subsequently,the control system is introduced in detail from both the hardware design and software control strategies.Finally,verification is conducted on the experimental platform.The controller designed is used to drive the molecular pump.The results show that the molecular pump can start stably and enter the rated working state.The rated speed of the molecular pump can reach 90000 r/min and the speed fluctuation remains stable within the range of±60 r/min.
作者
王彦劼
李强
陶继忠
WANG Yanjie;LI Qiang;TAO Jizhong(Institute of Machinery Manufacturing Technology,China Academy of Engineering Physics,Chengdu 610200,China)
出处
《机械》
2024年第2期65-71,共7页
Machinery
关键词
无位置传感器
无刷直流电机
分子泵
电机控制器
positioning sensor-less
brushless DC motor
molecular pump
motor controller
