The pulse wave generated by the IGBT and PWM speed control device for frequency conversion has a towering voltage peak, and the peak has a steep rising voltage, and the extremely high frequency (sometimes up to 20K Hz) can damage the insulating paint film of the enameled wire. The frequency conversion motor with ordinary enameled wire is prone to turn-to-turn breakdown, and the life of the motor is greatly reduced. Therefore, it is necessary to use enameled wire that can withstand corona.
With the development of frequency conversion technology, variable frequency speed regulation motors have been widely used, but when ordinary enameled wires are still used as inter-turn insulation, there will be premature breakdown and the life of the motor will decrease. At present, many wiring technology corona enameled wires at home and abroad are coated with three layers of paint. This wire structure can only improve the ability to resist partial discharge and overvoltage. If this enameled wire is stretched at the same time during use, its anti-corona performance will be obvious. Decrease, the data shows that if stretched by 5%, the corona resistance performance will be reduced by half, and if stretched by 10%, the life will be reduced by 90%.
Aiming at the defects of the above-mentioned three-layer enameled wire, a dual coated corona resistant enamelled wire is provided.
This time I will talk about the dual coated corona resistant enamelled wire composed of miniature round copper wires. The miniature round copper wires are coated with a primer anti-corona layer. The primer is corona-resistant enameled wire paint. Apply a layer of polyamideimide paint on the outside as a top coat. In the second coating process, a new primer-coating combination of topcoat is adopted. The daily chemical channel number is 14 primers and 6 topcoats. At the same time, the size of the paint joint mold is adjusted, and the paint film thickness reaches 2 levels to ensure the quality of the product.
With the development of frequency conversion technology, variable frequency speed regulation motors have been widely used, but when ordinary enameled wires are still used as inter-turn insulation, there will be premature breakdown and the life of the motor will decrease. At present, many wiring technology corona enameled wires at home and abroad are coated with three layers of paint. This wire structure can only improve the ability to resist partial discharge and overvoltage. If this enameled wire is stretched at the same time during use, its anti-corona performance will be obvious. Decrease, the data shows that if stretched by 5%, the corona resistance performance will be reduced by half, and if stretched by 10%, the life will be reduced by 90%.
Aiming at the defects of the above-mentioned three-layer enameled wire, a dual coated corona resistant enamelled wire is provided.
This time I will talk about the dual coated corona resistant enamelled wire composed of miniature round copper wires. The miniature round copper wires are coated with a primer anti-corona layer. The primer is corona-resistant enameled wire paint. Apply a layer of polyamideimide paint on the outside as a top coat. In the second coating process, a new primer-coating combination of topcoat is adopted. The daily chemical channel number is 14 primers and 6 topcoats. At the same time, the size of the paint joint mold is adjusted, and the paint film thickness reaches 2 levels to ensure the quality of the product.
