高功率密度1kV DC/DC模块电源研究设计

Analysis and Design of High Power Density 1 kV DC/DC Power Brick Module

随着地面及系留球载有源相控阵雷达供电功率不断增加,采用高压直流供电方案可以减少母线线缆的线径、重量及损耗,因此需要研究和设计高功率密度高压(850~1050 V)雷达阵面电源模块。采用了带飞跨电容的三电平DC/DC电路拓扑,初级开关管电压应力为输入电压的一半;采用移相调制策略和谐振电感实现了初级开关管软开关,降低了器件的开关损耗。此处介绍了电路拓扑工作模态,完成了功率密度为110 W/in^(3)1.2 kW 1 kV DC/DC模块电源的电路参数设计过程和实验样机制作,实验结果验证了该模块电源的工作特性。

With the increasing power level of ground and tethered ball-bome active phased array radar power system,high-voltage DC power supply scheme can reduce the wire diameter,weight and loss of bus cables.Therefore,it is necessary to research and design high power density high-voltage(850-1050 V)radar array power brick module.The three-level DC/DC circuit topology with flying capacitor is adopted,and the voltage stress of the primary switch is half of the input voltage.The phase shift modulation strategy and resonant inductor are used to realize the soft switching of the primary switch,which reduces the switching loss of the power device.The working modes of the circuit are introduced.The circuit parameter design process of power density 110 W/in^(3)1.2 kW 1 kV DC/DC power brick module and the experimental prototype are completed,the experimental results verify the correctness of the theoretical analysis and parameter design.