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Is A Switching Power Supply Better Than A Transformer?

The switching power supply is good.

Switching power supply has three advantages, as follows:

1) Low power consumption and high efficiency. In the switching power supply circuit, under the excitation of the excitation signal, the transistor V works alternately in the on-off and on-off on-off switching states. The conversion speed is very fast, and the frequency is generally about 50kHz. In some countries with advanced technology, hundreds or nearly 1000kHz can be achieved. This makes the power consumption of switching transistor V very small, and the efficiency of the power supply can be greatly improved, which can reach 80%.

2) Small size and light weight. From the schematic diagram of switching power supply, it can be clearly seen that there is no heavy power frequency transformer used here. Since the dissipated power on the adjusting tube V is greatly reduced, the larger heat sink is also omitted. Because of these two reasons, the switching power supply is small in size and light in weight.

3) Wide range of voltage stabilization. The output voltage of the slave switching power supply is regulated by the duty cycle of the excitation signal, and the change of the input signal voltage can be compensated by frequency modulation or width modulation. In this way, when the power frequency grid voltage changes greatly, it can still ensure a more stable output voltage. Therefore, the voltage stabilizing range of switching power supply is very wide and the voltage stabilizing effect is very good. In addition, there are two methods to change the duty cycle: pulse width modulation and frequency modulation. The switching power supply not only has the advantages of wide voltage stabilization range, but also has many methods to realize voltage stabilization. The designers can flexibly select various types of switching power supply according to the requirements of practical applications.

I hope it can help you.

Post time: Nov-14-2022