Abstract：In order to solve problems such as the low utilization ratio of voltage, a large number of voltage reverse pulse and high switching loss, caused by the conventional modulation method for the five-leg-inverter, a modulation method based on zero vector adjustments is proposed in this paper. In this method, pulse widths of voltage vectors are calculated according to space vector pulse width modulation (SVPWM) theory. The distribution of vectors is adjusted and optimized, especially the extra zero vectors are considered and inserted while the needs of the common leg for both motors collide, as a result, requirements from both motors can be satisfied at the same time. Simulation and experimental results show that both motor can operate at different speeds independently by using the proposed modulation method. Compared with the conventional half-cycle PWM method, the voltage transfer ratio of voltage increases twice, moreover, reverse voltage pulses and switching times in one sampling period are reduced effectively, which demonstrate the effectiveness of the proposed method.
梅杨, 黄伟超, 冯帅伟. 一种基于零矢量调节的五桥臂逆变器调制方法[J]. 电工技术学报, 2017, 32(增刊2): 96-102.
Mei Yang, Huang Weichao, Feng Shuaiwei. A Modulation Method for a Five-Leg-Inverter Based on the Zero Vector Adjustment. Transactions of China Electrotechnical Society, 2017, 32(增刊2): 96-102.
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2017, Vol. 32 
