基于电动汽车充电机的VIENNA整流器的滞环控制

Hysteresis Control Strategy of Three-level Six-switch Vienna Rectifier

在电动汽车快速发展的今天,保证充电机的工作性能十分必要。基于此目的,针对充电机中核心器件VIENNA整流器的复杂性、抗干扰性、网侧输入不稳定以及中点电位不平衡等方面的问题,采用滞环控制策略,实现系统快速反应,提高抗干扰能力;建立锁相环模块,实现了输入端电流电压的频率相位锁定。研究了中点电位平衡控制方法,有效地平衡了中点电位。建立相应的仿真模型,对系统的可行性和正确性进行了验证。整个系统设计在软、硬件方面易于实现。

With the rapid development of electric vehicles, it is necessary to ensure the performance of the charger. Based on this purpose, considering some problems of charging pile Vienna rectifier, like complexity, anti-interference, input side instability and potential unbalance at the neutral point of the core device, this paper investigated the hysteresis control system strategy to achieve rapid response and improve anti-interference ability; established PLL module to ensure frequency and phase locking of input voltage and current; introduced a methodology of neutral point potential balancing control to effectively balance the neutral point potential. In the additional research, established a corresponding simulation model and verified feasibility and correctness of the system. Conclusively, the whole system is easy to realize in hardware and software.