大功率开关电源的研制

RESEARCH ON A HIGH-CAPACITY SWITCHING MODE POWER SUPPLY

大功率开关电源的节能效益显著，但其制造和成本受到开关器件和开关变压器的制约。这里介绍一种输出功率达１ｋＷ的全桥式开关电源，由于在开关变压器结构工艺上采取一些特殊措施，可以用较廉价的功率ＭＯＳＦＥＴ管和集成脉冲宽度调制器ＳＧ３５２５Ａ构成。其电路简单、效率高、体积小、重量轻、保护全面快速而且成本较低。

A high-capacity switching-mode supply has a evident feature of energy-saving.The manifacturing and cost, however, limit its development. The paper introduces a full-bridge switching-mode power supply of capacity up to 1kW. Its cost can be reduced due to adapting some special measure which allows to adapt the low-cost power MOSFET and the pulse width-modulator IC SG3525A in manifacturing the construction of switching transformer. Such a new switching-mode power supply characterized by the simplicity of its circuit, high efficiency, small volume and wight realizing a fast and comprehensive protection with a low cost.