Abstract：According to the property of six-phase fault tolerant permanent magnet motor (FTPMM) and its drive topology, this paper proposes a deep research on the distribution rule of the voltage space vectors, fixed on their selection principle, and suggests the flux and torque estimation observers. The influence of integrated space voltage vector on the flux and torque in the normal and fault state is analyzed in detail, and the sectors and selection table of the switching voltage vectors are designed too, so that the direct torque control(DTC) strategy with fault tolerance is established in this paper. Through the winding open-circuit and short-circuit fault experiments of a 750W six-phase FTPMM and its control system, it is indicated that the speed and active power basically keep the same in the fault state. The results prove the correctness and feasibility of the proposed strategy, which is used in high reliability of aviation electric fuel pump to lay the foundation.
[1] Coleman A S, Hansen I G. The development of a highly reliable power management and distribution system for civil transport aircraft[R]. AIAA- 94 - 4107, 1994: 1-6. [2] Mecrow B C, Jack A G. Design and testing of a four-phase fault-tolerant permanent-magnet machine for an engine fuel pump[J]. IEEE Transactions on Energy Conversion, 2004, 19(2): 132-137. [3] Parsa L, Toliyat H A. Fault-tolerant five-phase permanent magnet motor drives[C]. IEEE Industry Applications Conference, Florida, USA, 2004: 1048- 1054 [4] 郝振洋, 胡育文, 黄文新. 电力作动器中永磁容错电机及其控制系统的发展[J]. 航空学报, 2008, 29(1): 65-74. Hao Zhenyang, Hu Yuwen, Huang Wenxin. Development of fault tolerant permanent magnet machine and its control system and its control system in electro-mechanical actuator[J]. Acta Aeronoutica et Astronautica Sinica, 2008, 29(1): 65-74. [5] Haylock J A, Mecrow B C, Jack A G. Enhanced current control of high-speed PM machine drives through the use of flux controllers[J]. IEEE Transactions on Industry Applications, 1999, 35(5): 1030-1038. [6] Wang Jiabin, Atallah K, Howe D. Optimal torque control of fault-tolerant permanent magnet brushless machines[J]. IEEE Transaction on Magnetic, 2003, 39(5): 2962-2964. [7] Bianchi N, Bolognani S. Impact of stator winding of a five-phase permanent-magnet motor on postfault operations[J]. IEEE Transaction on Power Electronics, 2008, 55(5): 1978-1987. [8] 郝振洋, 胡育文, 黄文新. 永磁容错电机最优电流直接控制策略[J]. 中国电机工程学报, 2011, 31(6): 46-51. Hao Zhenyang, Hu yuwen, Huang wenxin. Optimal cuurent direct control strategy for fault tolerant permanent magnet motor[J]. Proceedings of the CSEE, 2011, 31(6): 46-51. [9] Zhao Wenxiang, Cheng Ming, Chau K T, et al. Remedial injected-harmonic-current operation of redundant flux-switching permanent-magnet motor drives[J]. IEEE Transactions on Industrial Electronics, 2013, 1(60): 151-159. [10] Zhong L, Rahman M F, Hu W Y. Analysis of direct torque control in PMSM drives[J]. IEEE Transactions on Power Electronics, 1997, 12(7): 528-536. [11] Welchko B A, Lipo T A, Jahns T M, et al. Fault tolerant three-phase AC motor drive topologies: a comparison of features, cost, and limitations[J]. IEEE Transactions on Power Electronics, 2004, 19(6): 1108-1116. [12] 张兰红, 胡育文, 黄文新. 容错型四开关三相变换器异步发电系统的直接转矩控制研究[J]. 中国电机工程学报, 2005, 25(18): 140-145. Zhang Lanhong, Hu Yuwen, Huang Wenxin. Research on direct torque control of fault tolerant type four- switch three-phase converter induction generation system[J]. Proceedings of the CSEE, 2005, 25(18): 140-145. [13] 孙丹, 贺益康, 何宗元. 基于容错逆变器的永磁同步电机直接转矩控制[J]. 浙江大学学报, 2007, 41(07): 1101-1106. Sun Dan, He Yikang, He Zongyuan. Fault tolerant inverter based direct torque control for permanent magnet synchronous motor[J]. Journal of Zhejiang University, 2007, 41(07): 1101-1106. [14] 孙丹, 何益康,何宗元. 四开关逆变器供电永磁同步电机直接转矩控制系统转矩脉动抑制[J]. 中国电机工程学报, 2007, 27(21): 47-52. Sun Dan, He Yikang, He Zongyuan. Torque ripple reduction for a four-switch inverter fed PMSM DTC system[J]. Proceedings of the CSEE, 2007, 27(21): 47-52. [15] Mecrow B C, Jack A G, Haylock J A. Fault tolerant permanent magnet machine drives[J]. IEE Procee- dings of Electrical Power Applications, 1996, 143(6): 437-442. [16] Welchko B A, Jahns T M, Lipo T A. Short-circuit fault mitigation methods for interior PM synchronous machine drives using six-leg inverters[C]. IEEE Power Electronics Specialists Conference (PESC), Aachen, Germany, 2004: 2133-2139.
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