Impregnation of windings is the most important stage of rewinding, which is often underestimated. It largely depends on it how long the engine will last after repair. Let's figure out why it is needed.
Why impregnation is needed
- Mechanical fastening of turns. Impregnation fixes the winding so that vibration does not rub the insulation.
- Improved heat dissipation. Varnish fills voids, heat from the wire is better transferred to the body.
- Protection from moistureand aggressive environment.
- Increasing the electrical strengthof insulation.
Without high-quality impregnation, the winding overheats faster and is destroyed by vibration.
Methods impregnation
| Method | Features |
|---|---|
| Immersion | The winding is dipped into varnish - a simple and common method |
| Vacuum-pressure | The varnish penetrates deeply under pressure - the best result |
| Drip | For certain types of machines |
After impregnation, the winding must be dried in an oven so that the varnish polymerizes.
Why you can’t save on this
Some unscrupulous workshops skip or simplify impregnation in order to reduce the cost of work. Externally, the winding looks normal, but its service life is sharply reduced. Therefore, when choosing a service for rewinding, check whether full impregnation and drying are included. This is part of quality repair.
Do you want rewinding with proper impregnation in Tashkent? Elektromotors engineers perform a full cycle with impregnation and drying - contact us.