复合型级联多电平逆变器的调制方法研究

分析了复合型等电压比全桥单元级联型变换器,总结出一般的设计方法。经仿真和试验表明,在得到相同电平数输出的情况下,复合型级联多电平拓扑比传统级联型拓扑所需的全桥单元数量少。因此,采用复合型等电压比全桥单元级联型变换器可节省大量的开关器件和独立的电压源,从而简化了电路,降低了成本。此外。通过合适的调制方法,使输出电压的谐波含量远小于级联型拓扑的。

Research on the Modulation of Hybrid Multilevel Cascaded Inerter

The authors analyze the hybrid full-bridge cascaded inverter with equal voltage ratio and give a generalized modulation method.Simulation and experiment shown the proposed full-bridge cascaded inverter needs less numbers of full-bridge unit than conventional cascaded topology to get same output levels.Thus,the usage of full-bridge cascaded converter with equal voltage ratio can save a number of switching devices and separated powers,simplify the circuit and cut down the cost.The proper modulation method makes harmonic distortion of output voltage being far less than conventional cascaded converter's.