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The advantages of AC power are mainly:
1. The generator of the AC system is relatively simple and the cost is relatively low.
2. The voltage conversion of the AC system is very convenient to use a transformer, and the efficiency is very high, which can reach more than 90%, and it is also very safe. This brings great convenience to the change of the transmission voltage and the use of household low-voltage appliances, such as mobile phone chargers, audio systems, DVDs, MP3s, emergency lights, notebook computers, and so on. If it is a DC system, it is necessary to step down the resistor. The power of the step-down resistor is sometimes very large, and the power consumed is also large. There are also security risks.

As we all know, the generator rotor winding is energized to generate a rotating magnetic field to generate electricity, and the current must be introduced into the generator rotor winding through a carbon brush. Therefore, the carbon brush plays an important role as an important part of the generator set. The generator rotor winding runs at a high speed of 3000r / min so that the carbon brushes in direct contact with it and in a stationary state consume a large amount. At the same time, the high temperature of the carbon brush, high passing current and uneven current distribution caused by high-speed friction, operating environment, characteristics of the carbon brush itself, and man-made factors during operation also directly threaten the safe operation of the unit.

The AC exciter in the brushless AC synchronous generator has a w armature structure. Let's take the TFW series brushless AC synchronous transmission as an example to introduce the structure of the generator.
This type of generator base is welded with steel plates. The front and rear covers are made of cast iron, and the axial ventilation is self-cooled. The balance is supported by two bearings. The flange connected with the prime mover makes the unit easy to install.

Just as people need fresh air to maintain health, generators also need clean air. If the air contains too many impurities, it will reduce the power of the generator. The quality and circulation of airplay a decisive role in the generator set, and we must pay attention to it during use.

When it comes to brushless generators, there is a suspicion of hot fried cold rice, but we have to say, it will still be the trend in the next year. 'cause that is something we cannot ignore and it is also the current consensus fo the market.