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1.关于电视机开关电源“假负载”的几点看法(1)电视机负载是由电阻、电容、电感、半导体材料等组成的“复合型”负载;(2)电视机负载的电流变化很大,主要表现在行输出管的截止、饱和的两种状态上;(3)我们常常采用白炽灯泡做假负载;(4)当开关电源进入正常工作状态后,灯泡中的电流基本不变;它根本不具有电视机的负载特性;(5)由于灯泡的冷态电阻很小(一般为几十欧姆,且额定功率越大,电阻越小)在开机的瞬间,开关电源的负载相当于短路,可能造成开关电源的瞬
1 on the TV switching power supply “false load ” several views (1) TV load is composed of resistors, capacitors, inductors, semiconductor materials, such as “composite” load; (2) TV load (3) We often use incandescent bulbs to make false load; (4) When the switching power supply into the normal working state, the current in the bulb Basically does not change; it does not have the TV’s load characteristics; (5) the light bulb cold resistance is very small (usually tens of ohms, and the greater the rated power, the smaller the resistance) The load is equivalent to a short circuit, which may cause the instantaneous switching power supply