电子变压器原理分析及稳压设计

Analyzing on principle of electronic transformer and designing of regulated power supply

分析了电子变压器工作原理和影响开关频率的因素。由于电子变压器是开环的桥式开关电源,提出了应用电磁特性实现电压和电流的反馈方法,其脉宽调制方式采用RS触发器型的PWM。基于电磁特性原理设计出一款输出90 W的稳压电源,其具有结构简单、体积小、成本低等优点。

The electronic transformer theory and the factors affecting the switching frequency were analyzed in detail. As the electronic transformer was an open-loop bridge switching power supply in essence, the method of the voltage and current feedback, which realized by electromagnetic property, was proposed. The pulse width modulation was the RS flip-flop PWM. Finally, based on the principle of the electromagnetic property, a 90 W power supply, which had advantages of the simple structure, the small size, and low cost, was designed.