Why does a transformer heat up, what are the causes of transformer heat What are the causes of trans

It may be that a vortex has been generated.

For example, if an insulated wire is wound around an iron core, and after the alternating current is turned on, the current becomes a closed loop in the metal block.

That is, eddy current, or eddy current for short.

Because the resistance of the core is very small, the eddy current is very large, which will cause a lot of heat in the core.

You might as well replace the transformer metal core with a thin silicon steel sheet, after all, the thin silicon steel sheet is also used on the usual transformer.

The heating wire is replaced with a thinner resistor; Obviously, the output power is very large, and the high voltage of the output is not only added to both ends of the iron-chromium alloy, but also to the two ends of the coil in the transformer, so if the quality of the transformer is not very good, it will consume a lot of electricity, so it will heat up quickly; It may be that a vortex has been generated. The self-made transformer also has a large magnetic loss, that is, the input power is not fully output, and it becomes a leaking magnetic field.

It is better to retrofit with an off-the-shelf transformer.

The transformer can change the voltage, but not the power, that is, the output power = the input power.

You use it for cutting, obviously the output power is very large, and the high voltage of the output is not only added to both ends of the iron-chromium alloy, but also to the two ends of the coil inside the transformer, so if the quality of the transformer is not very good, it will consume a lot of electricity, so it will heat up quickly.

The ideal transformer ignores the coil resistance, the leakage of the magnetic field.

It cannot be ignored in the actual transformer.

The heat of the transformer indicates that the power is not enough, and the thick coil should be replaced.

The self-made transformer also has a large magnetic loss, that is, the input power is not fully output, and it becomes a leaking magnetic field.

It is better to retrofit with an off-the-shelf transformer.

The input power of the heating wire is greater than the output power of the transformer. The heating wire is replaced with a thinner resistor;

The current generates heat, and there is thermal power! What's the hurry!

Copy of transformer heating.

There are many reasons, such as the load overload of the transformer, which is more than 10 times higher than the temperature under the same load and cooling conditions, which is regarded as an abnormal increase in temperature, and the reasons for the abnormal temperature increase are: (1) Poor contact of the tap changer. (2) Short circuit between turns of the coil.

3) The internal joints are heated. (4) There is a short circuit or eddy current abnormal phenomenon between the ironcore silicon steel sheets. (5) The cooler works abnormally, etc.

The reason for the heating of the transformer, simply put, is the copper and iron loss, but it is very complicated, the copper loss alone, including the no-load current capacity, the no-load current is an important reason for the overheating of the transformer in use, and the excessive no-load current is closely related to the core material and process structure, wire material specifications; Speaking of iron loss, one of the main causes of transformer core heating is hysteresis loss, eddy current loss and conduction heat of the winding. To reduce the heating of the iron core, one is to strengthen cooling, the second is to use iron core materials with good magnetization characteristics, and the third is to increase the resistance between silicon steel sheets. In the production process, some process details are fully controlled, so that it can be ...... as little heat as possible.

There is internal attrition。In the operation of the transformer, due to the hysteresis loss, eddy current loss and copper loss of the coil in the core and coil, the temperature rises, and the heat diffuses to the surroundings by radiation and conduction, and when it is heated.

When the heat dissipation reaches a state of equilibrium, the temperature of each part tends to be stable.

Iron loss is a basically constant loss, which is related to the structure of the transformer, so it cannot be reduced or eliminated during operation, while copper loss (line loss) changes with the change of load.

Detection of the quality of the power transformer.

1. There is no open circuit in all coils of primary and secondary stages. Generally, the low-power step-down transformer has a thin and many primary coils, so it is easy to break, and the secondary is coarse and few, and rarely breaks. The primary resistance is generally in the tens to hundreds of ohms, and the smaller the power, the greater the measured resistance.

181 ohms, normal, estimated to be 4 5W transformer. The secondary resistance is much smaller, it should be in a few ohms to 0A few euros.

2. There is no short circuit between the primary and secondary coils, and there is no leakage. with a multimeter.

High resistance, the two table pens are connected to the primary and secondary coils respectively, indicating that they should be more than a few trillion ohms, and infinity is the best for the wax promotion.

3. The primary and secondary coils are not short-circuited with the iron core and do not leak. Refer to point 2.

4. There is no inter-turn short circuit between the primary and secondary coils. If the no-load is powered on, the transformer will be abnormally hot, and this is the reason. Moreover, turn-to-turn short circuits cannot be detected with a multimeter.

Hello, there are generally the following reasons for overheating: (1) The primary input voltage is too high. (2) The secondary load power is too heavy, that is, the load current is too large.

3) The deterioration of the insulation performance of the silicon steel sheet of the transformer causes the eddy current of the core to increase. (4) The harmonic current is too large. (5) The manufacturing process is not good.

6) The design is unreasonable, and the number of primary turns is insufficient. (7) If there is a very small number of lines in the primary or secondary stage, which lap is short-circuited. (8) The ambient temperature is too high.

There can be many reasons why a transformer burns out, but here are some of the main ones.

First of all, there may be an overheating problem inside the transformer. This can be caused by excessive current in the windings inside the transformer. When an electric current is passed through the windings, a resistance is generated, which will generate heat.

If this heat is not well dissipated, it can lead to overheating of the windings. Overheated windings will reduce the performance of the insulation, which will lead to deterioration of the cable insulation, which will eventually lead to a short circuit in the transformer.

Secondly, the pile removal device of the transformer worm may fail. When the transformer is running, gas is generated inside, which needs to be discharged through the exhaust device. If this device fails, it will cause the air pressure inside the transformer to increase.

When the air pressure increases above the nominal value, the enlargement and short circuit of the components will occur, which will cause the transformer to burn out.

In addition, transformers may have faulty places such as faulty components or sensors. When these components fail, the transformer will not function properly, and abnormal currents, voltages, frequencies and temperatures may be generated, which may cause damage to the transformer.

For transformer precautions, first of all, sufficient effort must be put into the design and selection of the internal windings of the transformer to ensure that the windings can withstand the required current load, accompanied by adequate cooling and heat dissipation. Secondly, the exhaust line must be checked regularly to ensure that the failure rate of the exhaust device is low, thus ensuring that the pressure is relieved. Finally, it is necessary to regularly check the physical structure and electrical properties of the energized components to deal with the problem in time to avoid damage.

In conclusion, there are many reasons for transformer burnout, including various factors such as overheating, exhaust line failure, faulty components, etc. In order to prevent the transformer from burning out, it is necessary to take the necessary precautions and maintenance measures so that it has less chance of sailing. <>

It is not normal for the transformer to be hot. The transformer current passes through the coils inside the transformer, and the transformer coils have resistors, and these coil resistors generate a certain amount of heat, and the transformer will heat up slightly. If it is hot, it means that the transformer is abnormal, and the reason may be that the load power is too large and the power of the transformer is small, or the transformer has been damaged.

Solution: You can use your nose to smell the outer coil of the transformer, if there is a mushy smell, it means that the transformer has been damaged. It is necessary to replace it with a new transformer of the same type or a higher power.