双电压合成调制和空间矢量调制的一致性

Consistency of Double Line-to-line Voltage Synthesis and Space-vector Modulation Strategies

在深入分析矩阵变换器双电压合成调制和空间矢量调制策略基本原理的基础上,从数学的角度证明了2种调制策略占空比的计算表达式是一致的,说明2种调制策略宏观上是统一的。从开关序列安排、原点开关的基本概念以及功率因数控制等方面揭示了2种调制策略的一致性。受空间矢量调制中利用相反的有效矢量抑制共模电压的方法的启发,提出一种减少共模电压的双电压合成方法,仿真结果验证了该方法的正确性和可行性,进一步证实了空间矢量调制和双电压合成调制的内在一致性。

Based on the in-depth analysis of the basic principles of the matrix converter double line-to-line voltage syntheses （DLLVS） and the space vector modulation （SVM）, the consistency of duty ratio calculation of the two modulation strategies have been proved from the mathematical point of view. Then, the consistency is revealed from the respects of switching sequence, the concepts of the ＂origin switch＂, power factor and common mode voltage. Inspired by the method using opposite active vector to control the common mode voltage in the space vector modulation, this paper proposed a new method about the double line-to-line voltage, which effectively reduces the common-mode voltage. Simulation results verified the accuracy and feasibility of the proposed method, and as a result, the inherent consistency of SVM and DLLVS is demonstrated.