What are the types of switching power supplies?

According to the use situation, determine the voltage, current, current size, installation method, and power required by the switching power supply, and then select the switching power supply suitable for each function. In addition, the load and working environment of the switching power supply must also be considered. Now let us introduce in detail what types of switching power supplies are available. I hope to help you when choosing a switching power supply or DR-Din rail power supply.

Here is the content list:

• Single-ended flyback switching power supply

• Single-ended forward switching power supply

• Self-excited switching power supply

• Push-pull switching power supply

Single-ended flyback switching power supply

The single-ended single-ended flyback switching power supply means that the magnetic core of the high-frequency converter only works on one side of the hysteresis loop. The so-called flyback means that when the switch tube VT1 is turned on, the induced voltage of the primary winding of the high-frequency transformer T is positive and negative, and the rectifier diode VD1 is in the off state, storing energy in the primary winding. A single-ended flyback switching power supply is a low-cost power supply circuit with an output power of 20-100W, which can output different voltages at the same time, and has a better voltage regulation rate. The only disadvantage is that the output ripple voltage is large, the external characteristics are poor, and it is suitable for a relatively fixed load.

Single-ended forward switching power supply

The single-ended forward switching power supply is similar in form to the single-ended flyback circuit, but the working conditions are different. When the switching tube VT1 is turned on, VD2 is also turned on. At this time, the grid transfers energy to the load, and the filter inductor L stores energy; when the switching tube VT1 is turned off, the inductor L continues to release energy to the load through the freewheeling diode VD3. The transformer used in this switching power supply has a complex structure and a larger volume. For this reason, the actual application of this circuit is less.

Self-excited switching power supply

The self-excited switching power supply is a switching power supply composed of an intermittent oscillation circuit, and it is also one of the basic power supplies widely used at present. The switch tube in the self-excited switching power supplyplays a dual role in switching and oscillation, eliminating the need for a control circuit. Since the load is located on the secondary side of the transformer and works in the flyback state in the circuit, it has the advantage that the input and output are isolated from each other. This circuit is not only suitable for high-power power supplies, but also for low-power power supplies.

Push-pull switching power supply

The two switching tubes of the push-pull switching power supply are easy to drive, and the withstand voltage of the switching tube must reach twice the peak voltage of the circuit. The output power of the circuit is relatively large, generally in the range of 100-500W.

There are many types of switching power supply, you can choose the switching power supply or DR-Din rail power supply that suits you according to your needs. Zhejiang Ximeng Electronic Technology Co., Ltd. continuously improves the staff's quality awareness and strictly requires the production quality of products.