What is the difference between switching power supply and regulated power supply?
There are many types of regulated power supplies, series of rectifier power transformers, regulated power supplies, filter capacitors, regulating elements (regulating tubes or three red regulators, etc.), reference voltage sampling networks, and comparison amplifier overload or short circuit protection. Because of the linear series voltage regulator, adjust the tube circuit voltage. Its disadvantages are strength, inefficiency, and allowing the grid to fluctuate in range. The general series of regulated power supply allows the grid fluctuation range of ±22)V(220).
In order to reduce energy consumption and improve work efficiency, switching regulated power supply is introduced, which is usually called switching power supply. It has the following:
First, the switching power supply is directly to the power grid voltage rectifier filter, and then adjust the voltage regulator switch tube. So no transformer is needed.
The switching power supply is usually used as a switching power semiconductor device to adjust the output voltage by controlling the switching duty ratio. In a power transistor (GTR), for example, when a switching tube is saturated, the voltage at both ends of the collector and transmitter drops to zero, the switching tube has a zero cut-off date, so the collector current is consumed with high efficiency. The maximum efficiency is 70 to 95While consumption is reduced. radiator
Third, the switching frequency is used for tens of Hertz capacity filter capacitors and small inductance values. Therefore, the switching power supply is light in weight and small in size.
Fourth, due to low power consumption and low temperature, it improves the stability and reliability of the machine.
The grid adaptive ability of switching power supply has also been improved. The voltage range varies from 110 to 260V, and a stable output voltage can be obtained.