论文部分内容阅读
双Buck逆变器(DBI)是航空静止变流器(ASIs)的常用拓扑,从双Buck半桥逆变器(DBHBIs)两直流电感中分离出交流电感使得体积、重量进一步减小。在正常工作,尤其是负载短路情况下,双Buck半桥逆变器输入侧电容上的电压产生与输出同频的脉动。以交流电感分立的双Buck半桥逆变器为例,分析了在额定负载、短路、级联工作等情况下输入电容电压脉动的产生原因,给出了该脉动的定量计算方法,并由此得出了输入侧电容容值的选择依据。最后通过仿真和实验,验证了文中分析的正确性。该分析方法同样适用于其他半桥型逆变器拓扑。
Dual Buck Inverters (DBIs) are common topologies for aviation static converters (ASIs). The separation of the AC inductors from the DC couplings of the dual Buck half-bridge inverters (DBHBIs) further reduces the size and weight. In normal operation, especially when the load is short-circuited, the voltage on the input side capacitor of the double-Buck half-bridge inverter generates pulsations with the same frequency as the output. Taking the double inductor of double Buck converter with AC inductance as an example, the cause of input capacitor voltage ripple under rated load, short circuit and cascade operation is analyzed. The quantitative calculation method of the ripple is given. The input capacitance of the selection of the basis. Finally, through the simulation and experiment, the correctness of the analysis in the text is verified. This method of analysis is equally applicable to other half-bridge inverter topologies.