Integral insulation of F.H.P. motors by the film draw process

The conventional ground insulation system for F.H.P. motors consists of individual slot cell liners and endpunching insulators separating the magnet wire from the magnetic core structure. There has not been a basic change in this ground insulation system for several decades. This suggests that the Insulation Engineer 1. has established the ultimate ground insulation system. 2. is limited by the availability of suitable electrical insulating materials. 3. has been concentrating his efforts on the design technique of substitution rather than on basic functional design criteria.