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采用自顶向下的设计方法,设计出一种新的基于FPGA的空间矢量脉宽调制发生器。通过设置逻辑判断子模块,调制发生器能有效地处理过调制。通过利用宏功能,空间矢量脉宽调制发生器的一些子模块能完成更为有效的逻辑综合与器件实现。该脉宽调制发生器的实现结构紧凑,时序逻辑简单,能方便地设置开关频率,且能灵活调整死区时间,以适用于不同的应用场合。基于MATLAB/SimPowerSystems与Altera DSP Builder的集成开发环境,设计出一个FPGA实验平台(硬件环仿真平台),并通过硬件环仿真对所设计的空间矢量脉宽调制发生器进行验证。实验结果表明了设计策略的有效性。
A top-down design method is used to design a new space-vector PWM generator based on FPGA. By setting the logical decision sub-module, the modulation generator can effectively handle over-modulation. By taking advantage of the megafunctions, some of the sub-modules of the space vector pulse-width modulation generator enable more efficient logic synthesis and device implementation. The pulse width modulation generator has the advantages of compact structure, simple logic of sequence, easy setting of switching frequency, flexible adjustment of dead time and application in different applications. Based on the integrated development environment of MATLAB / SimPowerSystems and Altera DSP Builder, an FPGA experiment platform (hardware ring simulation platform) is designed, and the designed space vector pulse-width modulation generator is verified by hardware ring simulation. The experimental results show that the design strategy is effective.