's motor insulation contains stepper motor coil, between interturn, platoon, interlayer and ground insulation, end all kinds of support or fixed wing all kinds of insulation components and cable and wire insulation. The main insulation of wire coil is refers to the coil of the fuselage and other insulation between the winding and habits also called for insulation. Turn-to-turn insulation means the same coil insulation between the turn and turn. Strands of insulation is refers to the insulation between the line of stocks within the same turn, generally for the insulation of the winding line itself. Motor insulation is decided to use the life of the important factors, therefore it is necessary to correctly choose and placement of insulation materials. Induction motor stator winding insulation is divided into slot insulation, insulation (Layer insulation here don't need)。 1, slot insulation used in slot, is insulation between the winding and iron core. 2, phase insulation is also called the end insulation, used for insulation between the winding end two winding. 3, layer insulation is used in double-layer winding insulation between the up and down. Insulation material is based on motor insulation level and voltage level to select the main insulation materials, and with the appropriate reinforcement materials, and to maintain the main insulation materials from the mechanical damage. Commonly used reinforcement materials have green shell paper, the main insulation materials such as polyester film, linoleum. When choosing unique edge information, the main insulation material and the lead wire, tube, cable tie, impregnating varnish and so on should be of the same class of insulation, supporting each other.