A Novel Control of Five-Phase Six-Leg Switching Power Amplifier in Magnetic Levitating Bearing System
Liu Chengzi1,2, Deng Zhiquan1, Cao Xin1, Li Kexiang1, Zhou Jie1
1.College of Automation Nanjing University of Aeronautics and Astronautic Nanjing 210016 China 2.College of Automation Nanjing University of Posts and Telecommunications Nanjing 210023 China
Abstract：The traditional current control algorithm for the five-phase six-leg switching power amplifier in the magnetic levitating bearing system is complicated and different phase currents are intercoupling. To address this problem, a novel decoupling control strategy is proposed in this paper. This method sets the duty cycle of the neutral leg as 0.5, which ensures that the average current of each phase is equal to the reference in each control cycle and realizes the independent and decoupling control for the output currents. The mathematic model of the system is built, and the prototype is constructed to test this method. Both the simulation and experimental results have demonstrated that the five-phase six-leg output currents can be controlled independently. The proposed method has the advantages of easy control, less computation, quick dynamic response, high accuracy, and strong universality.
刘程子, 邓智泉, 曹鑫, 李克翔, 周杰. 一种新型的磁悬浮轴承五相六桥臂开关功率放大器控制策略[J]. 电工技术学报, 2016, 31(9): 112-119.
Liu Chengzi, Deng Zhiquan, Cao Xin, Li Kexiang, Zhou Jie. A Novel Control of Five-Phase Six-Leg Switching Power Amplifier in Magnetic Levitating Bearing System. Transactions of China Electrotechnical Society, 2016, 31(9): 112-119.
[1] McMullen P T,Huynh C S,Hayes R J.Combination radial-axial magnetic bearing[C]//Seventh International Symposium on Magnetic Bearings,ETH Zurich,2000:473-478. [2] Schweitzer G,Bleuler H,Traxler A.Active magnetic bearings[M].ETH Zurich:Hochschulverlag AG an der ETH Zurich,1994. [3] Williams R D,Keith F J,Allaire P E.Digital control of active magnetic bearings[J].IEEE Transactions on Industrial Electronics,1990,37(1):19-27. [4] Carabelli S,Maddaleno F,Muzzarelli M.High-efficiency linear power amplifier for active magnetic bearings[J].IEEE Transactions on Industrial Electronics,2000,47(1):17-24. [5] Fang Jiancheng,Ren Yuan.Self-adaptive phase-lead compensation based on unsymmetrical current sampling resistance network for magnetic bearing switching power amplifiers[J].IEEE Transactions on Industrial Electronics,2012,59(2):1218-1227. [6] 李祥生.多桥臂磁轴承开关功率放大器关键技术研究[D].南京:南京航空航天大学,2010. [7] Liu Chengzi,Deng Zhiquan,Hua Chun,et al.Design and implementation of a five-phase six-leg switching power amplifier for five degrees of freedom magnetic levitation bearing system[C]//2013 8th IEEE Conference on Industrial Electronics and Applications,Melbourne,2013:1254-1258. [8] Li Xiangsheng,Zhiquan Deng,Chen Zhida,et al.Analysis and simplification of three-dimensional space vector PWM for three-phase four-leg inverters[J].IEEE Transactions on Industrial Electronics,2011,58(2):450-464. [9] 李祥生,邓智泉,陈志达,等.电流型四桥臂开关功放控制方法[J].电工技术学报,2011,26(2):156-164. Li Xiangsheng,Deng Zhiquan,Chen Zhida,et al.Study on a control method of current mode four-leg switching power amplifier[J].Transactions of China Electrotechnical Society,2011,26(2):156-164. [10]阮新波,严仰光.四桥臂三相逆变器的控制策略[J].电工技术学报,2000,15(1):61-64. Ruan Xinbo,Yan Yangguang.The control strategy for three-phase Inverter with four bridge legs[J].Transactions of China Electrotechnical Society,2000,15(1):61-64. [11]费清照,邓智泉,王晓琳,等.适用于磁悬浮轴承的新型五相六桥臂开关功放控制策略[J].中国电机工程学报,2012,32(9):124-131. Fei Qingzhao,Deng Zhiquan,Wang Xiaolin,et al.A control strategy of novel five-phase six-leg switching power amplifiers applied in magnetic levitation bearing systems[J].Proceedings of the CSEE,2012,32(9):124-13l. [12]Smedley K M,Cuk S.One-cycle control of switching converters[J].IEEE Transactions on Power Electronics,1995,10(6):625-633. [13]Qian Chongming,Jin Taotao,Smedley K M.One-cycle control of three-phase active power filter with vector operation[J].IEEE Transactions on Industrial Electronics,2004,51(2):455-463. [14]Smith K M,Lai Z,Smedley K M.A new PWM controller with one-cycle response[J].IEEE Transactions on Power Electronics,1999,14(1):142-150. [15]Lai Z,Smedley K M.A new extension of one-cycle control and its application to switching power amplifiers[J].IEEE Transactions on Power Electronics,1996,11(1):99-105. [16]Chatterjee K,Ghodke D V,Chandra A,et al.Modified one-cycle controlled load compensator[J].IET Power Electron,2011,4(4):481-490. [17]Ghodke D V,Chatterjee K,Fernandes B G.Modified one-cycle controlled bidirectional high-power-factor ac-to-dc converter[J].IEEE Transactions on Industrial Electronics,2008,55(6):2459-2472. [18]Sreeraj E S,Chatterjee K,Bandyopadhyay S.One cycle controlled single-stage,single-phase voltage sensor-less grid-connected PV system[J].IEEE Transactions on Industrial Electronics,2013,60(3):1216-1224. [19]Chen Y,Smedley K M.One-cycle-controlled three-phase grid-connected inverters and their parallel operation[J].IEEE Transactions on Industry Applications,2008,44(2):663-671. [20]Bento A A M,Vieira P K P,Silva E R C D.Application of the one-cycle control technique to a three-phase three-level NPC rectifier[J].IEEE Transactions on Industry Applications,2014,50(2):1177-1184.
2016, Vol. 31 
