基于矩阵式变换器的电动汽车充放电研究

Charging-discharging technology for electric vehicles based on matrix converter

针对电动汽车非接触式充放电系统,提出了一种以3×1矩阵式变换器为前级主电路、LCCL-LCCL为谐振回路的新型结构,并对空间矢量调制策略进行优化。分析了3×1矩阵式变换器的拓扑结构及调制方法,对LCCL-LCCL谐振补偿结构进行了特性研究,推导了谐振回路两端电压相角差可以改变功率的大小和传输方向的结论,从而实现了能量的双向流动,即电动汽车的充放电控制。并通过实验验证了该理论的可行性和正确性。

Aiming at the non-contact charging and discharging system of electric vehicle,a new structure with 3×1 matrix converter as the pre-stage main circuit and LCCL-LCCL as the resonant circuit is proposed in this paper,and the space vector modulation strategy is optimized.In this paper,the topology and modulation method of 3×1 matrix converter are analyzed firstly.Then,the characteristics of LCCL-LCCL resonant compensation structure are studied.The conclusion that the voltage and phase differences between the two ends of the resonant circuit can change the amount and direction of the power flow is derived,accordingly achieving the bidirectional flow of energy,that is,the charging and discharging control of the electric vehicles.The feasibility and correctness of the theory are verified by experiment.