三相双Buck宽变频逆变器研究

Research on the Wide Variable Frequency Three-phase Dual Buck Inverter

介绍了两态滞环电流控制型双Buck逆变器(Dual Buck Inverter,简称DBI)的电路结构和工作原理,提出了一种滞环电流控制型逆变器输出滤波器的解耦设计方法。在此基础上进行了三相组合式实验研究,通过数字控制技术实现了逆变器系统360～800Hz宽变频输出。通过三相6kVA原理样机验证了该逆变器系统在全频率范围具有良好的输出电压波形和较高的效率,因此应用前景广阔。

The circuit diagram and principle of the two level hysteresis current controlled dual Buck inverter （DBI） are introduced.A new method of decomposed design based on hysteresis current controlled inverter＇ s LC filter is proposed.Then threephase combined inverter is researched, with the digital control, which makes the inverter system can output 360-800 Hz voltage.Finally, the fulfilled 6 kVA inverter prototype with high efficiency confirms the design and performance.