A Novel SVPWM Compensation Strategy Based on Regulating Dead Time On-Line
He Zhengyi1, Ji Xuewu1, Qu Wenlong2
1. State Key Laboratory of Automotive Safety and Energy Tsinghua University Beijing 100084 China 2. State Key Laboratory of Control and Simulation of Power System and Generation Equipment Tsinghua University Beijing 100084 China
Abstract：This paper presents a novel dead-time compensation method for improving the phase current waveform of permanent magnet synchronous motor. The traditional dead-time compensation methods for space vector PWM (SVPWM) are based on the assumption that the dead-time in three inverter legs are fixed, which require accurate current direction information so as to eliminate dead-time effect correctly. In this paper, a new method which independently regulates the dead-time of three inverter legs and the value of dead time is adjusted on-line by the value of corresponding phase current is proposed. With the proposed method, the dead-time disturbance voltage vector rotates synchronously with current vector and no longer depends on current direction. Furthermore, the dead-time disturbance voltage vector in d-q coordinate can be calculated from #em/em#d and #em/em#q without detecting current direction. The experimental results validate that the proposed algorithm can minimize the phase current distortion.
何正义, 季学武, 瞿文龙. 一种新颖的基于死区时间在线调整的SVPWM补偿算法[J]. 电工技术学报, 2009, 24(6): 42-47.
He Zhengyi, Ji Xuewu, Qu Wenlong. A Novel SVPWM Compensation Strategy Based on Regulating Dead Time On-Line. Transactions of China Electrotechnical Society, 2009, 24(6): 42-47.
[1] Sukegawa T, Kamiyama K, Mizuno K, et al. Fully digital, vector-controlled PWM VSI-fed AC drives with an inverter dead-time compensation strategy [J]. IEEE Transactions on Industry Applications, 1991, 27(3):552-559. [2] Munoz A R, Lipo T A. On-line dead-time compensation technique for open-loop PWM-VSI drives[J].IEEE Transactions on Power Electronics, 1999, 14(4):683- 689. [3] Hyun Soo Kim, Hyung Tae Moon, Myung-Joong Youn. On-line dead-time compensation method using disturbance observer[J]. IEEE Transactions on Power Electronics, 2003, 18(6):1336-1345. [4] 吴茂刚, 赵荣祥, 汤新舟. 正弦和空间矢量PWM逆变器死区效应分析与补偿[J].中国电机工程学报, 2006, 26(12):101-105. time effects analysis and compensation of SPWM and SVPWM[J]. Proceedings of the CSEE, 2006, 26(12):101-105. [5] Leggate D, Kerkman R J. Pulse-based dead-time compensator for PWM voltage inverters[J].IEEE Transactions on Industrial Electronics, 1997, 44(2): 191-197. [6] 胡庆波, 吕征宇. 一种新颖的基于空间矢量PWM的死区补偿方法[J].中国电机工程学报, 2005, 25(3):13-17. [7] Urasaki N, Senjyu T, Uezato K, et al. On-line dead-time compensation method for permanent magnet synchronous motor drive[C]. IEEE ICIT'02, 2002, 1:268-273. [8] Urasaki N, Senjyu T, Uezato K, et al. On-line dead-time compensation method for voltage source inverter fed motor drives[C].IEEE APEC'04, 2004, 1:122-127. [9] Jung Soo Choi, Ji Yong Yoo, Seung Won Lim, et al. A novel dead time minimization algorithm of the PWM inverter[C].IEEE IAS, 1999, 4:2188-2193. [10] Jong Woo Choi, Seung Ki Sul. Inverter output voltage synthesis using novel dead time compensation [J].IEEE Transactions on Power Electronics, 1996, 11 (2):221-227.
2009, Vol. 24 
