基于FPGA和嵌入式计算机的三电平逆变器研究

Research on a Control Method in Three-level Inverter based on FPGA and embedded Computer

在传统的两电平电压型逆变器空间矢量脉宽调制(SVPWM)控制算法基础上,提出了一种新型而简单的三电平矢量作用时间和区间划分的算法。介绍了控制系统的控制策略,详细阐述了基于现场可编程门阵列(FPGA)和嵌入式计算机的硬件平台实现方法,并建立了控制系统的平台。实验证明,该算法是合理的,它提高了运算速率和系统的可靠性,而且能大大简化三电平逆变器的SVPWM计算。

Based on the traditional SVPWM algorithm for two-level VSI,a new simple SVPWM strategy for threelevel VSI is proposed.The control algorithm and the realization means are described in detail.The new method was carried out based on FPGA and embedded computer.The prototype of control system was created,which improved the calculated speed considerably, and the reliability was also improved.The experimental results show that this method is reasonable, the strategy can simplify the calculation of SVPWM for three-level VSI.At last, the expectation of using the control algorithm to multilevel inverters is discussed.