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压缩机用永磁同步电机转速脉动的抑制-控制理论与应用
30 11 Vol. 30 No. 11 2013 11 Control Theory Applications Nov. 2013 DOI: 10.7641/CTA.2013.30227 , , , ( , 410082) : , . , , . PI, . PI . , , . PI(PI-resonance, PI–RES) , . : ; ; ; ; : TM921 : A Suppression of speed ripples of permanent magnetic synchronous motor for compressor application ZHANG Wen-juan , HUANG Shou-dao, GAO Jian, XIAO Lei (College of Electrical and Information Engineering, Hunan University, Changsha Hunan 410082, China) Abstract: When applying the permanent magnetic synchronous motors (PMSM) to refrigerant system, the suppres- sion of speed ripples of the PMSM in low-feed range becomes the focus of consideration. We start with the generation mechanism and the periodical characteristics of the speed ripples to propose an adaptive control algorithm. In this control algorithm, we place a frequency variable resonance controller in parallel with the conditional proportion and integral (PI) controller to form a PI-resonance (PI–RES) controller. The compensation torque current generated by the resonance con- troller and the main reference current generated by the PI controller constitute the reference torque current. Because of the existence of the compensation torque current, the electromagnetic torque can follow the variation of the load torque more perfectly, thus the speed ripples are suppressed. Performance indices of the conventional PI controller and the PI–RES controller are compared and evaluated through experimental investigations. The results validate the effectiveness of the proposed algorithm. Key words: refrigerant syst
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