Space-Vector Overmodulation Strategy for Ultrasparse Matrix Converter Based on the Maximum Output Voltage Vector

作者：Li, Shanhu; Xia, Changliang^*; Yan, Yan; Shi, Tingna

来源：IEEE Transactions on Power Electronics, 2017, 32(7): 5388-5397.

DOI：10.1109/TPEL.2016.2604418

• Double Fourier integral
• low-order harmonic components
• maximum output voltage vector
• overmodulation strategy
• ultrasparse matrix converter (USMC)

In this paper, a space-vector overmodulation strategy for an ultrasparse matrix converter (USMC) is proposed. The maximum output voltage vector, which has the same phase as reference voltage, is derived accurately in space-vector modulation. According to the maximum output voltage vector, the overmodulation mode I and mode II are re-divided, the boundary voltage transfer ratio (VTR) of which is extended to 0.954, whereas the maximum VTR of USMC remains 1, and the low-order harmonic components are reduced effectively. The overmodulation strategies in both modes are realized, respectively, by the linear superimposed principle. In addition, the harmonic characteristics of output voltage in overmodulation mode are analyzed by the double Fourier integral transform method. It is shown that the output voltage contains not only (6z(1) +/- 1) f(out) harmonics, but also |f(out) +/- 6z(2) f(in)| and |(6z(1) +/- 1) f(out) +/- 6z(2)f(in) | harmonics. The effectiveness of the proposed overmodulation strategy and the correctness of harmonic analysis method are verified by experiments.

• 出版日期2017-7
• 单位天津大学