Abstract：The expansion of automotive electronic system and the disadvantage of the conventional rectifier should not be ignored. To achieve unity power factor and complete the step-down rectification in single stage, this paper presents a new type of AC-DC matrix converter with 42V for automotives. It removed the impact of harmonics which is caused by the dead time and reduced the cost of the system. In this paper, the modulation strategy of AC-DC matrix converter derived from that of three-phase - three-phase matrix converter and the methods of commutation are studied. The optimized modulation strategy named AV method is used to control the switch-state. The four-step commutation strategy is a solution of the risks for short circuit, open circuit and the dead-time problem. The experimental results based on DSP system and the simulation results demonstrate the validity and effectiveness of the system.
[1] E Shi L W, Zhang X Y. Development of 42V automobile brushless alternator with combined stator[C].Asia-Pacific Power and Energy Engineering Conference, 2010: 1-4. [2] Mudannayake C P, Rahman M F. Control design for an inductions machine based 42V integrated starter alternator[J]. IEEE Industry Applications Magazine, 2009, 15(4): 14-25. [3] Choi Jun Hyuk, You Se Hyun, Hur Jin, et al. The design and fabrication of BLDC motor and drive for 42V automotive applications[C]. IEEE Industrial Electronics Conference, 2007: 1086-1091. [4] Holmes D G, Lipo T A. Implementation of a controlled rectifier using AC-AC matrix converter theory[C]. IEEE Power Electronics Specialists Conference, 1989: 353-359. [5] Ejea J B, Sanchis Kilders E, Carrasco J A, et al. High-frequency bi-directional three-phase rectifier with power factor correction[C]. IEEE 32nd Annual Power Electronics Specialists Conference, 2001, 3: 1303-1308. [6] Vlatkovic V, Borojevic D, Lee F C. A zero-voltage switched three-phase isolated PWM buck rectifier[J]. IEEE Transactions on Power Electronics, 1995, 10(2): 148-157. [7] Ma Xinghe, Tan Guojun, Wu XiaoIan, et al. Research on improved four-step commutation strategy of matrix converter based on two line voltage synthesis[C]. Innovative Computing, Information and Control Conference, 2007: 503. [8] 马星河, 谭国俊, 方永丽, 等. 矩阵变换器变步长换流策略[J]. 电工技术学报, 2007, 22(9): 93-98. [9] Feifer M P, Chroder G S. New commutation method of a matrix converter[C]. IEEE International Symposium on Industrial Electronics. 2009: 1516-1519. [10] Linhart L, Lettl J, Bauer J. Matrix converter two-step commutation method limitations[C]. Power Electronics and Motion Control Conference, 2010: T3-53-T3-58. [11] Hu C L, Yang P, Xiao Y, et al. Hardware design and realization of matrix converter based on DSP & CPLD[C]. Power Electronics Systems and Applications, 2009: 1-5. [12] Lv H, Nie Z L, Ye Z H. A new controlled commutation strategies for matrix converter[C]. Computer Science and Computational Technology, 2008:242-245. [13] Zhou D, Sun K, Liu Z, et al．A novel driving and protection circuit for reverse-blocking IGBT used in matrix converter[J]. IEEE Transactions on Industrial Electronics, 2007, 43(1): 3-13.
2011, Vol. 26 
