In the electronic products that we come into contact with every day, we can find magnetic core components, including the heart-switching transformer of switching power supply. Nowadays, many electronic products are switching power supplies, so as practitioners in the electronics industry, they have to understand the transformers of switching power supplies. Cloud control supply chain technology, so how to deal with the high temperature of the switching power supply transformer?

How to deal with excessive temperature of switching power transformer:

Step 1

First of all, from the perspective of the transformer itself, once the temperature rise is too high, hot and hot, it is mainly caused by four problems.

1. They are: copper loss, winding process problems, transformer iron loss and transformer planning power is too small.

2. No-load heating is due to the bad insulation of the transformer or the input voltage of the transformer is high, the insulation is bad and the coil needs to be rewound, and the input voltage is high and the input voltage needs to decrease the input voltage or increase the number of coils.

3. If the voltage is normal and the load is hot, it means that the load of the power transformer is too large and the load design needs to be changed.

Step 2

In the design process of switching power transformer, the heating situation of MOS tube is the most severe, and its own temperature rise is caused by loss.

1. The loss of MOS tube is composed of two parts: loss and on-state loss in the switching process.

2. The on-state loss can be reduced by selecting a switch tube with low on-state resistance, and the switching process loss is caused by the gate charge and the switching time, and the loss in the switching process can be reduced by the device with faster switching speed and shorter recovery time.

3. But more importantly, the loss can be greatly reduced by designing better control methods and buffers, such as soft switches.

There is also the possibility that the temperature rise of the power transformer itself will be too high, that is, the aging phenomenon of the transformer itself. When the engineer examines the transformer itself and the MOS tube and finds nothing abnormal, it is necessary to make an inference based on the working time and operating life of the transformer. Cloud-controlled supply chain technology