1. The concept of insulating layer material: a material that can block the flow of current, and its volume resistivity generally exceeds 109ΩNaN.

2. The role of the insulating layer material: isolate the charged part from the uncharged part or the part with different potentials from each other, so that the current can flow according to a certain path.

3. Motor: Electromagnetic mechanical equipment for energy conversion

Fourth, the main materials used in the manufacture of motors: conductive materials (windings, commutators, brushes), insulating layer materials (electrically separate the live parts from the iron core, frame and other grounding components and the live parts with different potentials), Magnetic materials (manufacturing the various components of the magnetic system such as iron cores, bases, etc.).

5. Motor insulation structure: inter-turn insulation, inter-layer insulation, ground insulation, and outsourcing insulation. There are also three, filling insulation, liner insulation, and commutator insulation.

5.1 Turn-to-turn insulation: the turn-to-turn insulation of the main pole coil and the commutating pole coil, the turn-to-turn insulation of the armature coil, the exchange photo, the inter-piece insulation, the insulation between each turn of the same coil.

5.2 Interlayer insulation; insulation between each layer of the main pole coil of the layered flat winding, the front and rear sections of the armature winding, the insulation between the upper and lower layers of the slot, the insulation between the upper and lower layers of the coil

5.3 Ground insulation: refers to the insulation between each winding of the motor to the frame and other uncharged components, the ground insulation of the main pole coil, the ground insulation of the armature winding, and the ground insulation of the commutator. Isolate the live components in the motor from the uncharged components such as the base and iron core to prevent ground breakdown.

5.4 Outsourcing insulation: The insulation wrapped around the ground insulation is mainly to protect the ground insulation from mechanical damage and make the entire coil solid and flat, and it also plays a role in reinforcing the ground insulation.

5.5 Filling and insulation: filling the gap of the coil, so that the entire coil is firmly formed as a whole, reducing vibration, and also making the coil shape regular and flat, so as to facilitate the insulation of the bandage and the heat dissipation.

5.6 Liner insulation: protect the insulation structure from mechanical damage during process operations

5.7 Insulation of the commutator: change the insulation between the plates, insulate the plate group to the ground, change the V-shaped mica ring and mica sleeve between the photo group and the pressing ring, and multi-layer high-quality shellac plastic mica

6. Hydrogenerator rotor insulation: turn-to-turn insulation, magnetic pole support plate, and pole body insulation.

7. Stator bar wire insulation: inter-row insulation, transposition insulation, transposition filling.