Laminates for Motor Slot Insulation
Motor slot and phase laminates are used to insulate the copper winding wires from the stator and rotor laminations.
Slot insulation requires to be made of a mechanically tough material that is also a good electrical insulator.
By laminating materials with complementary attributes an ideal electrical insulation material can be produced at a commercial price.
Laminates of Nomex® and polyester film are extensively used as slot insulation for class F (155°C+) motors, typically used for electrical appliance( washing machines and spin dryers)
Laminates of Nomex® and polyimide (Kapton®) film are used as slot insulation for class H (180°C+) motors, typically these can be found on board aircraft for the air conditioning system or fuel pump generator sets.
Typical construction of laminates:
NMN – 222, 232, 323, 333, 353 MIL
NKN – 222 232, 333, 23
NMN rolls are supplied 914mm wide x 50M long
NKN rolls are supplied 610mm wide x 50M long
