Why Does The Vibration Motor Need Winding Insulation Treatment?

Date: 2023-07-10     From: Longding     Author: admin

The insulation treatment is a key link in the manufacture of vibration motors. Common insulation treatment processes for motors include dipping and baking, insulation casting, and molding curing of multi-glue systems. Mold curing of multi-adhesive systems is common in large hydro-generators and turbo-generators. Most of the small and medium-sized motors use the baking and curing process after impregnating insulating varnish.

Why should the vibration motor be insulated?

1. Enhanced insulation properties

The motor winding has some damage to the coil insulation during the process of winding, coil forming, transfer, embedding, and shaping, and some insulating materials will also have some local defects. The local defects of the insulation structure can be compensated after the varnish is dipped and baked and cured.

2. Improve mechanical strength

The insulating structure, the iron core, and the end fastening structure formed a very strong hole after dipping, baking, and curing. The mechanical strength and electrical performance of the insulation structure are greatly improved, and the relative friction damage caused by electromagnetic force and mechanical vibration between the coil conductors and between the coil and the iron core during the operation of the motor is avoided.

3. Improve thermal conductivity and reduce motor temperature rise

Usually, the thermal conductivity of the insulating resin after curing is greater than that of air. When the air gap in the motor winding is completely filled with insulating resin, the thermal conductivity will be greatly improved and the temperature rise will be significantly reduced.

4. Improve anti-pollution performance

After the winding is dipped and cured, the chemical stability is high, and a dense paint film will be formed on the surface, which can effectively prevent the erosion of moisture, salt spray and mold.

5. Improve anti-corona performance

When the gaps in the coil are fully filled with insulating varnish, the air in the insulating structure can be effectively isolated, and the electric field distribution inside the insulating structure can be made uniform and the potential gradient can be reduced. At the same time, due to the smooth and uniform surface paint film formed, the potential gradient of the interface between the insulating surface and the air is small, and it is not easy to corona, thus playing a certain anti-corona effect.