The impregnation with resins permits cavities and spaces to be closed and sealed between the windings of the wires. The fixation of the wires around the windings achieves improved insulation and minimized vibrations. This procedure also increases the thermal conductivity and provides better protection against exterior (environmental) influences, and creates a connection effect on the laminations.
Criteria of a high-quality impregnation:
• complete intrusion of the resin into existing gaps
• no bubbles in the winding mass
• creates a connection to the laminations
• no resin residues on shafts and sheets
2-component trickle resin on epoxy resin basis, curing at increased temperature