具备母线升压的无刷直流电机方波调速控制方法  

Square Wave Speed Control Method of Brushless DC Motor With Bus Voltage Boosting

作　　者：蔡骏[1,2] 庞浩 束寅志[1] 刘聪贤 CAI Jun;PANG Hao;SHU Yinzhi;LIU Congxian(School of Automation, Nanjing University of Information Science & Technology, Nanjing 210044, China;Jiangsu Collaborative Innovation Center of Atmospheric Environment and Equipment Technology Nanjing 210044, China)

机构地区：[1]南京信息工程大学自动化学院,南京210044 [2]江苏省大气环境与装备技术协同创新中心,南京210044

出　　处：《微电机》2020年第9期82-88,共7页Micromotors

基　　金：国家自然科学基金青年基金项目(51607095);江苏省六大人才高峰高层次人才项目(GDZB-018)。

摘　　要：无刷直流电机在传统的方波调速中至少需要对三个开关管进行高频PWM控制。随着闭环参考转速的提升,开关频率升高,相应的开关管损耗将增加。此外,转速闭环控制与电机的控制策略是耦合的。为解决该问题,本文将升压DC-DC变换器与无刷直流电机三相全桥功率变换器级联,研究了母线电压定电压转速闭环和变电压转速闭环这两种控制策略。通过对比可以发现母线电压变电压转速闭环控制方式可以在不改变无刷直流电机基本控制算法的前提下实现调速控制和换相控制的解耦,因此更适合于电机高速运行时的转速闭环控制。为验证所提方法的可行性,基于一台60 W的无刷直流电机系统实验平台对两种控制策略下的转速突变控制特性进行了实验研究。In the traditional square-wave speed control of brushless DC motor,at least three switches need to be controlled by high frequency PWM.With the increase of the closed-loop reference speed,the switch frequency increases and the corresponding switch loss increases.In addition,the speed closed-loop control is coupled with the control strategy of the motor.To solve this problem,this paper cascaded the boost DC-DC converter with the brushless DC motor three-phase full-bridge power converter,and studied the bus voltage constant voltage and variable voltage speed closed-loop control strategies.By comparison,it can be found that the closed-loop control mode of bus voltage,voltage and speed can decouple speed control and phase-change control without changing the basic control algorithm of brushless DC motor,so it is more suitable for speed closed-loop control of motor at high speed.To verify the feasibility of the proposed method,the abrupt speed control characteristics under two control strategies were experimentally studied based on a 60W brushless DC motor system experimental platform.

关 键 词：升压变换器 转速闭环 方波控制 无刷直流电机 

分 类 号：TM36+1[电气工程—电机] TP272[自动化与计算机技术—检测技术与自动化装置]