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FPGA Realization of Trapezoidal PWM for Generalized Frequency Converter

机译：通用变频器梯形PWM的FPGA实现

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Combining concept of cyclo-converter and cyclo-inverter, a generalized frequency converter has been developed where undesirable harmonic components are minimized using nonsinusoidal carrier-based PWM, which is a trapezoidal pulsewidth modulation technique. The study begins by establishing a model of frequency converter to obtain the firing sequence for cyclo-converter and cyclo-inverter mode of operation. The converter is simulated using the well-known software Matlab and simulations results are presented for a single-phase ac supply. It has been found that, for cyclo-inverter operation, the minimum total harmonic distortion in the output voltage is found to be 4.8%, while during cyclo-converter operation it is only 2%. Simulation results are validated with the experimental results. A prototype of frequency converter is developed where a field-programmable gate array is used to generate the PWM trigger signal through Xilinx 9.2i. The results are also compared with other existing carrier-based modulation techniques.
机译：结合了环变频器和环变频器的概念，已开发出一种通用变频器，其中使用基于梯形脉宽调制技术的基于非正弦载波的PWM将不良谐波分量降至最低。该研究从建立变频器模型开始，以获得用于循环变换器和循环逆变器操作模式的点火序列。使用著名的Matlab软件对该转换器进行仿真，并给出了单相交流电源的仿真结果。已经发现，对于循环逆变器操作，发现输出电压中的最小总谐波失真为4.8％，而在循环变换器操作期间，其仅为2％。仿真结果与实验结果进行了验证。开发了变频器的原型，其中现场可编程门阵列用于通过Xilinx 9.2i生成PWM触发信号。还将结果与其他现有的基于载波的调制技术进行比较。

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