判断开关稳压电源变换器工作情况的一种方法

A Method of Judging the Operation of Switching Voltage-Stabilized Power Converter

开关稳压电源有多种类型,其中正激式开关电源因其电路简单可靠、抗过载能力强、所需元器件较少、容易集成、不易饱和且能够提供多路隔离输出等优点而被广泛应用于中、小功率电源领域。针对正激式开关稳压电源被广泛应用的现状,需要迅速准确地判断开关电源的工作情况,以实现快速的故障排除。本研究以正向激励变换器为例,通过介绍其电路构成及工作原理,结合电压和电流波形特征,客观形象地阐述了一种通过观测开关晶体管电压与电流波形来把握变换器电路工作情况的方法。

There are many types of switching voltage-stabilized power supply, among which positiveswitching power supply is widely used in the field of medium and small power supply due to itsadvantages of simple and reliable circuit, strong anti-overload capability, less required components, easyintegration, difficulty in saturation and being able to provide multiple isolated outputs. In view of thecurrent situation that positive switching power supply is widely used, it is necessary to quickly andaccurately judge the working condition of switching power supply in order to realize rapid troubleshooting.Taking forward converter as an example, this study objectively describes a method to monitor theoperation of converter circuit by observing the voltage and current waveforms of switching transistors byintroducing its circuit structure and working principle and combining the characteristics of voltage andcurrent waveforms.