Appearance?Working principle?Advantages and disadvantages?
The difference between switching mode power supply and non switching mode power supply:Switch type transformer is generally used in pulse switch circuit, (mostly ferrite core), small size, little material, low price. Non switching transformer common power supply, coupling and output transformer (mostly using silicon steel core), the process is complex, more materials, higher cost.
In a switching type power supply device, when the switching type power supply operates under normal working load, the power factor is improved, and the control circuit provides its working voltage. Therefore, the boost chopper circuit can be controlled by improving the control circuit so as to improve the power factor of the device. By comparison, in the non oscillation period, when the switching control circuit is in the gap oscillation mode, the power consumption is small, and the voltage induced in the auxiliary winding is reduced. As a result, the voltage of the auxiliary power supply will also decrease. In addition, when the driving voltage is supplied to improve the power factor control circuit provides the voltage reducing circuit is reduced to below the working voltage, improve the power factor control circuit stops its function, so as to decrease power consumption.
Switch type transformer is generally used in switching power supply and other high frequency circuit applications, the advantage is that small size, high efficiency, cheap! Non switch type transformer is our commonly used low frequency transformer, bulky, bulky, cost copper, iron.
