摘要
通过对三相矩阵式AC-AC拓扑结构变换电路的分析,把AC-AC九开关式矩阵式变换器等效为虚拟“整流”和“逆变”2部分;分析了不对称规则采样法正弦脉冲宽度调制SPWM(Sine Pulse Width Modulation)波生成原理,并把不对称规则采样法SPWM调制应用于三相AC-AC矩阵式变换器。在理论上对这种变换电路推导出了各种条件下的开关组合、各开关组合的通断时序和通断时间计算公式。使用Matlab/Simulink对结论进行了仿真,证明了把不对称规则采样法SPWM调制应用于三相AC-AC矩阵式变换器是可行的,应用推导结论可根据需要在矩阵式变换器上生成相位、幅值、频率均可调的三相SPWM调制波。
Based on the topological analysis of three-phase matrix AC to AC conversion circuit, an AC to AC nine-switch matrix converter is equivalent to virtual rectification part and conversion part. The asymmetric regular sampling method SPWM（Sine Pulse Width Modulation） is studied and then applied in the three- phase matrix AC to AC converter. Switch combinations under different conditions as well as their on- off sequence and on- off time calculation are deduced in theory. Simulation with Matlab/Simulink verifies its feasibility. The deduced strategy can be used to generate three-phase SPWM for matrix converter with tunable phase,amplitude and frequency.
出处
《电力自动化设备》
EI
CSCD
北大核心
2006年第8期30-33,共4页
Electric Power Automation Equipment
