Resin Impregnation for Motor & Generator Industry

Impregnation System

Impregnation plants are generally required in motor and generator industry. These plants are utilized for impregnating coils of LT/HT motors and generators with varnishes or resins. Impregnation process improves the insulation resistance. The process also enhances overall performance of the part or machine in which the impregnated coils are used. Impregnation also increases the component life and hence now it is turning out to be a mandatory process for electrical industry.

Flood Impregnation or Dipping Method:

The Flood Impregnation system is typically suitable for LT motors of low rating. The Flood Impregnation or Dip Impregnation system consists of a varnish storage tank (cold storage) and dipping / impregnating chamber. Motor winding are assembled in a basket structure and kept in the dipping tank. Varnish is pumped in the dipping tank and the coils get plastered with varnish in dipping tank. Storage tank is also provided with a stirring facility.

Vacuum Pressure Impregnation

Vacuum Pressure Impregnation is the most commonly used method of Impregnation in the motor and generator industry. The system has a resin (or varnish) storage tank and a impregnating Chamber. Coils to be treated are placed in the impregnating chamber and the chamber is evacuated by a vacuum pump. Resin (or varnish) is drawn from the storage tank in the impregnating chamber. Resin can be forced with additional pressure for better penetration in the winding. After a stipulated time, the resin is transferred to the storage tank and stored in cold conditions.

Trickle Impregnation

Trickle Impregnation method is generally used for quick production cycles in the motor or generator industry with minimal (no wastage) of resin. Single or groups of stator/rotor are kept on a tray – the work station. The components on the work station are heated. The work station spins slowly as it gets coats of resin.

Services and Supports

We are proficient in manufacturing tailor-made resin impregnation systems machines for our customers. We have interest in manufacturing plants that suit customer demands rather than typically designed impregnation systems. We are more keen on detail design of impregnation process rather than on thumb-rule selection of elements of the impregnation systems.

Impregnation system design involves calculation of tank capacities, vacuum pump, pipeline, valves, mode of control and design of other features like chillers and compressors. Designing a well organized impregnation system results in overall cost effectiveness and improved efficiency with best performance. Appropriate component selection that suit the impregnation cycle in typical environment is given priority. Involvement of customer and cross table discussions result in better design. Discussions gain us knowledge of the exact demand at the user-end