彩色电视机开关电源工作原理解读

The Analysis of the Operation Principle of the Color TV Set

彩色电视机开关电源的稳压输出与输入电压、电源负载有关。稳压最根本取决于开关管导通速率、导通时间和开关脉冲的占空比。开关电源问题本质上都是如何形成周期性振荡及对此振荡进行控制的问题,首先要形成自由振荡,然后要使这种自由振荡变成受控振荡。当输出电压变化时,再对其进行限制。其工作均包含启动、循环、限制三过程。

The colour TV switching power constant voltage output related to the input voltage and the power source load. The most radically constant voltage is decided by the ratio of the room of the switching valve which led passes the speed, led passes the time and the gate pulse occupies the spatial ratio. The switching power supply question is essentially how to form and control the periodic vibration, firstly we must form the free oscillation, then make this kind of free oscillation be controlled. When output voltage change, we should limit it. The whole work includes three processes as the ‘start’, ‘circulation’and ‘limit’