多电平通用空间矢量调制集成电路及其FPGA实现

A SVM IC for Multilevel Converters and Its FPGA-based Implementation

提出一种多电平变流器空间矢量控制(space vector modulation,SVM)集成电路(integrated circuit,IC)的设计方法。所提出的多电平SVMIC是建立在参考电压分解的通用多电平SVM算法的基础上,适用于任何电平数目的多电平变流器。采用可编程逻辑门阵列(field-programmable gate array,FPGA)实现所提出的多电平SVM IC。基于FPGA的多电平SVM IC具有高速的处理能力,在数字控制器中专门用于脉冲信号的发生,可解决多电平SVM算法占用数字信号处理器(digital signal processor,DSP)计算资源过多的问题,并可实现较高的开关频率。并且采用所提出的多电平SVM IC可大大加速产品的开发周期。通过在1台9电平级联式变流器上的试验结果对所提出的多电平SVM IC进行验证。

A new approach in realization of multilevel space vector modulation （SVM） control integrated circuit （IC） using field-programmable gate array （FPGA） was presented. The proposed SVM IC, which builds on an universal multilevel SVM algorithm based on decomposing reference voltage vector, is generally applicable to converters with any number of levels. The proposed SVM IC has been realized using the state-ofthe-art FGPA technique and can serve as a part of the digital controller to generate SVM gating signals for multilevel converters. Owing to the high-speed processing capability of FPGA, the proposed multilevel SVM IC can release the computation load of the microprocessor. Fast prototyping and higher switching frequency are other advantages. The developed multilevel SVM IC has been verified using the experimental results on a nine-level cascaded H-bridges converter.