高频开关电源毕业设计论文

摘要

通信电源是电信网的能源，其供电质量的好坏直接关系到整个电信网的畅通，本设计分析了国内外高频开关电源的发展和现状，研究了高频开关电源的基本原理以及高频开关电源在电力直流操作电源系统中的应用，设计出一种实用于电力系统的高频开关电源，以替代传统的相控电源。该系统以MOSFET作为功率开关器件，构成带隔离变压器的推挽式直流斩波开关变换器，采用脉宽调制PWM技术，从输出实时采样电压反馈信号，以控制输出电压的变化，控制电路和主电路之间通过变压器或光电耦合器进行隔离，并设计了软启动和过流保护电路。

关键词高频开关电源推挽式变换器 MOSFET

A二苯并菲bstract

The correspondence power switch is the telecommunication network energy, its power supply quality quality relates directly to the entire telecommunication network神经质症 unimpededness, The Paper analyze the Present situation and development of丽彩士 h1gh_freque2009年诺贝尔生理学或医学奖

ncy Switching power supply(HF SPS) domestically and overseas，study and research the basal principle of HF SPS and its application in electric power system，then design HF SPS applied in e1eetric power system in order to replace the old supply controlled by phase angle. The feedback voltage achieved from output is used to control the change of the output.The primary circuit and the control circuit are insulated by transformer or photo coupler. The Soft_Start and the Over Current Self_protection are also designed.

Keywords 吴少芳HF Switch power Supply Push-pull Converter MOSFET

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