COIL FOR SUBMERGED MOTOR

摘要

PURPOSE:To extend the service life of a coil for submerged motor in a high temp. water by applying enamel coating comprising as main component polyamidimide resin on the surface of copper conductor, and forming thereon an insulation layer of polypropylene resin mixed with rubber component or rubber changed polypropylene resin. CONSTITUTION:On the surface of copper conductor 1 a conductor shielding layer 3a is formed by a coating process of resin mainly composed of polyamideimide resin, and an insulation layer 2a is formed thereon. The layer is made of rubber changed polypropylene resin or polypropylene resin mixed with rubber component. The polyamideimide resin are excellent in hydrolysis resistance and less in deterioration even in a high temp. water and functions as a conductor shield layer over a long time. The above polypropylene resins are excellent in surface flexibility and slidability and functions as a sheath for preventing damage.