SPWM高频数字控制型双Buck全桥逆变器
SPWM high frequency digital control dual-Buck full bridge inverter

针对低频数字控制的双Buck逆变器开关频率低、控制周期长、系统功率密度低、输出波形质量不高的特点. 基于高性能DSP设计双闭环SPWM高频数字控制算法，搭建双Buck全桥逆变器样机平台，展开逆变器高频恒频数字控制的研究. 仿真与实验表明，所设计的高频控制方案合理有效，其得益于DSP内部高效的浮点数学计算单元对复杂算法的快速运算，实现系统100kHz开关频率的控制. 高性能DSP高频开关控制逆变器不仅可缩短控制周期，保证系统高效率高质量波形输出，还可有效降低滤波器件的体积，提高系统整机功率密度.
According to the characteristics of the low frequency digital control dual-Buck inverter is low switching frequency，long control period，low power density，and the output waveform quality is not high. Based on a high performance DSP，design of double closed loop SPWM high frequency digital control algorithm，build a dual-Buck full bridge inverter prototype platform，research on high frequency constant frequency digital control of inverter. Simulation and experiment show that the designed high - frequency control scheme is reasonable and effective.Thanks to the DSP efficient floating-point math calculation unit fast computation of complex algorithm，realization of control system for 100kHz switching frequency. High performance DSP high frequency switch control can not only shorten the system control cycle，ensure the high efficiency and high quality waveform output，but also can effectively reduce the volume of the filter device，improve the system power density