NECCOFlex Multi-Turn Coils for Small Bore Machines
NECCOFlex coils have been designed for small bore, high-speed machines and smaller hydros to ease the installation of coils at the lap.
NECCOFlex-E multi-turn stator coils provide owners with the dielectric advantages of a traditional VPI coil but with a specially-engineered flexibility at the coil knuckles that eases its installation in a small bore machine or one with a tightly lapped winding. Small bore machines typically have slots that cannot always accommodate conventional multi-turn Roebel bars. The NECCOFlex coil exceeds the flexibility needed to properly install the coil cells in the slots. Compared to the alternative of using spliced half coils, a NECCOFlex winding requires only half the number of connections.
Also, since these coils are made the same way as our standard NECCO Bond-E coils only with special adaptations for flexibility at the end turns, depending on actual machine design dimensions and overall "wind-ability,"
NECCOFlex-E Coils the high-quality solution for small-bore units
Just as with NEC's fully cured NECCOBond-E VPI coils, NECCOFlex coils are placed in a "dummy core" mock-up of the stator for which they are designed. Coil fit and clearances between the coils are tested at various stages during the manufacturing process. These checks are just part of the battery of dimensional checks and electrical testing that NEC performs on every coil it manufactures.