在某型机载相控阵雷达中，阵面电源采用移相控制零电压软开关PWM变换技术，既能实现功率管的零电压开关，又能实现功率管的恒定频率控制，符合电力电子技术的发展方向。该电源功率大，功率密度高，与传统小功率机载电源相比，总功耗增加，热设计更复杂。文中介绍了该电源的热设计过程，并着重对冷板和高功率变压器的热设计进行了深入的探讨。

A PS-ZVS PWM soft switching power supply is applied in an airborne phased array radar, which realizes both zero-voltage-switching and constant frequency control of power tube and accords with the development trend of electrical and electronic technology. It has high power capacitance and high power density. When compared with traditional lower power capacitance airborne power supply, this power supply gets increased total-power-consumption and more complex heat design. This paper contents the process of heat design for the power supply, especially the design methods for cold plate and high power transformer are discussed in more details.

TN958.92