基于双电流调节器的无刷直流电机换相转矩脉动抑制  

Commutation torque ripple reduction in brushless DC motor based on double current regulators

作　　者：魏海峰[1] 李萍萍[1] 刘国海[2] 贾洪平[2] 

机构地区：[1]江苏大学现代农业装备与技术省部共建教育部/江苏省重点实验室,江苏镇江212013 [2]江苏大学电气信息工程学院,江苏镇江212013

出　　处：《江苏大学学报（自然科学版）》2010年第6期691-694,共4页Journal of Jiangsu University：Natural Science Edition

基　　金：江苏省自然科学基金资助项目(BK2007094);教育部博士点基金资助项目(20050299009);江苏省研究生培养创新工程基金资助项目(CX07B_117z)

摘　　要：针对无刷直流电机存在的换相转矩脉动问题,以维持非换相电流恒定为目标,提出对电机换相区开通相和关断相的电流变化率分别进行控制的双电流调节器方案.分析了无刷直流电机换相过程,新方案采用PWM-ON调制方式.基于滑模变结构控制设计的主电流调节器,根据非换相电流偏差自动调节趋近速度,削弱了换相转矩脉动.换相区关断相占空比由辅调节器控制,采用模糊控制思想,根据反电势幅值实时确定占空比大小.基于无刷直流电机双闭环控制系统,利用Matlab软件对控制方案进行了仿真试验.结果表明,在电机高、低速换相区,双电流调节器都可正常工作,使非换相电流保持基本恒定,从而有效抑制了电机换相转矩脉动.To suppress the commutation torque ripple,a BLDCM（brushless DC motor） control scheme with double current regulators was proposed.Phase commutation of BLDCM was analysed.This scheme was aimed to keep the non-commutation phase current constant by making the change rates of the upco-ming phase current and the outgoing phase current eqeal.The main current regulator based on sliding mode variable structure was used to control the upcoming current,according to deviation of the non-commutation phase current.The fuzzy control was adopted in the assistant regulator to adjust the duty of the outgoing phase real time,according to the back electromotive force.Simulation was carried out using Matlab software based on dual closed-loop control.Results show that the commutation torque ripple is effectively reduced,either in the the high-speed or low-speed commutation region.

关 键 词：无刷直流电机 换相转矩脉动 电流 滑模变结构 模糊 

分 类 号：TM301.2[电气工程—电机]