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PWMON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.
Abstract
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 highspeed or lowspeed 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
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Key words
BLDCM /
commutation torque ripple /
current /
variable structure sliding mode /
fuzzy
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参考文献
[1]ElSayed H S, ElKhouly F M, Khater M M, et al. Fuzzy logic based speed control of a permanent magnet brushless DC motor drive[C]∥Proceedings of the 2007 International Conference on Electrical Engineering. Piscataway: IEEE Computer Society, 2007,doi:101109/ICEE.20074287294.
[2]Singh P K, Rai P. An ANN based XPC target controller for speed control of permanent magnet brushless DC motor[C]∥Proceedings of the 2005 IEEE Conference on Control Applications. New York: IEEE Inc., 2005: 1027-1032.
[3]Wang H P, Liu Y T. Integrated design of speedsensorless and adaptive speed controller for a brushless DC motor[J]. IEEE Transactions on Power Electronics, 2006, 21(2): 518-523.
[4]Lin C L, Jan H Y, Shieh N C. GAbased multiobjective PID control for a linear brushless DC motor[J]. IEEE/ASME Transactions on Mechatronics, 2003, 8(1): 56-65.
[5]张相军, 陈伯时. 无刷直流电机控制系统中PWM调制方式对换相转矩脉动的影响[J]. 电机与控制学报, 2003, 7(2): 87-91.
Zhang Xiangjun, Chen Boshi. The different influences of four PWM modes on commutation torque ripples in brushless DC motor control system[J]. Electric Machines and Control, 2003, 7(2): 87-91. (in Chinese)
[6]贾洪平, 贺益康. 永磁同步电机滑模变结构直接转矩控制[J]. 电工技术学报, 2006, 21(1): 1-6.
Jia Hongping, He Yikang. Variable structure sliding mode control for PMSM DTC[J]. Transactions of China Electrotechnical Society, 2006, 21(1): 1-6. (in Chinese)
[7]年漪蓓, 高国琴. 一类非线性系统自适应模糊滑模控制器的设计[J]. 江苏大学学报:自然科学版, 2005, 26(3): 261-265.
Nian Yibei, Gao Guoqin. Adaptive fuzzy sliding mode control design for a class of nonlinear systems[J]. Journal of Jiangsu University: Natural Science Edition, 2005, 26(3): 261-265. (in Chinese)
[8]夏长亮, 刘均华, 俞卫, 等. 基于扩张状态观测器的永磁无刷直流电机滑模变结构控制[J]. 中国电机工程学报, 2006, 26(20): 139-143.
Xia Changliang, Liu Junhua, Yu Wei, et al. Variable structure control of BLDCM based on extended state observer[J]. Proceedings of the CSEE, 2006, 26(20): 139-143. (in Chinese)
[9]Liu Yong, Zhu Ziqiang, Howe David. Instantaneous torque estimation in sensorless directtorquecontrolled brushless DC motors[J]. IEEE Transactions on Industry Applications, 2006, 42(5): 1275-1283.
[10]殷云华, 郑宾, 郑浩鑫. 一种基于Matlab的无刷直流电机控制系统建模仿真方法[J]. 系统仿真学报, 2008, 20(2): 293-298.
Yin Yunhua, Zheng Bin, Zheng Haoxin. A method for modeling and simulation of brushless DC motor control system based on Matlab[J]. Journal of System Simulation, 2008, 20(2): 293-298. (in Chinese)
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脚注
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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)
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