【摘要】 针对高精度逆变器的特殊性能要求,提出了基于FPGA的全数字化控制方案。该方案既具有数字电路稳定可靠的一般特点,又具有数字控制系统可重复编程、响应快以及可并行运算等特点。给出了直流母线电压补偿和直流漂移的调偏控制原理,设计出基于FPGA的数字控制系统中反比例系数前置放大器、调偏控制以及SPWM多重化信号生成的一套全数字化实现方案。最后在一台单相8重化9电平电压型逆变器的实验平台上进行实验验证,其结果证明了该控制方案的有效性。更多还原

【Abstract】 Owing to the special requirement for high-precision and wide-band inverter,a novel control scheme is pre-sented based on field programmable gate array(FPGA).The scheme is steady and trusty as digital circuit,programmable,and rapid in response and parellel for operation,etc.The theory for compensation of DC generatrix voltage and offset control of DC drift current for AC output is introduced.The realization scheme of digital control system,including to inverse proportion coefficient front amplifier,and offset control and multiple SPWM wave form,is introduced based on FPGA.Finally,the experimental results are analyzed in a signal-phase voltage source inverter operating in eight multi-ple and nine level,which confirm the value of the algorithm.更多还原