Corona resistant enamels developed in Elantas Europe: an opportunity for sustainability

Special magnet wires enamels have been developed to resist film degradation due to partial discharges activity in the presence of fast rise-time voltage surges as those ones generated by inverter fed drives. The behavior and the properties of corona resistant wires enamelled with nano-structured polyesterimide and polyamideimide set up by Elantas are described, with specific reference to wire build up. In particular, lately developed corona resistant polyamideimide Allotherm 602 CR FLAT, suitable for round and flat wires, showed outstanding resistance even when used as topcoat in typical wire base/top ratios.