Design Of DC/DC Module Power With Wide-Range Input Voltage And High-Effciency

Switching power supply is a type of the modern power converters and it is an important element of many electronic systems. The modular power system is a common modular switching power converter and plays an important role in many application areas, including aviation, aerospace, communications, instruments, power supply in the integrated system and so on. Along with the more miniaturization of the electronic system, the traditional centralized power supply mode is replaced gradually by the distributed power supply mode, whose core translator is the DC/DC modular power system.In this dissertation, we design a new low-power DC/DC modular power system with wide-range input and high-efficiency, which is available for the power supply system of the missiles. This modular power system should be provided with the properties of high power density, high efficiency, wide-range input, high reliability, high reliability and the resistance of high-frequency interference. First, according to the requirements of the electrical performance, we design the whole circuits, where we considered the topology of the modular power system, the complexity of the circuits, the loss of the circuits, the election of the electronic components and the thermal design. If the circuits have less, the system will be higher reliable. So in order to increase the efficiency, we must make sure that the loss of each part of the circuits is very low. Then the primary side feedback power is modeling and the loop-compensation is designed using MATLAB. Next the thermal design of the modular power system is researched which allow the electronic components work steadily in a wide temperature range. Last, the power module need thermal analysis and simulation, and component layout of PCB circuit board also need to rationalize the design. Though FloTHERM thermal simulation software, PCB circuit board can be optimized, and module power dissipation capability be improved, so as to be satisfied with reliability requirements.The theoretical analysis and the experimental results indicate that the system designed in this dissertation can meet all of the requirements of the DC/DC modular power system.