Use of Motor Insulation Materials

1、 Concept of motor insulation material: the material that can prevent the current from passing through, and the volume resistivity is usually greater than 109 Ω Nan
2、 Function of motor insulation material: isolate the live part from the uncharged part or the part with different potential, so that the current can flow in a certain path.
3、 Motor: electromagnetic mechanical equipment for energy conversion
Motor Insulation Materials
4、 The main materials used to manufacture the motor: conductive materials (winding, commutator, brush), insulating materials (to separate the live parts from the grounding parts such as iron core and machine base, and the live parts with different potentials electrically), magnetic conducting materials (to manufacture various parts of the magnetic system such as iron core and machine base, etc.).
5、 Insulation structure of motor: turn to turn insulation, layer to layer insulation, ground insulation, outsourcing insulation. There are also three, filled insulation, pad insulation, commutator insulation.
Nomex insulation paper
5.1 turn to turn insulation of motor insulation material: turn to turn insulation of main pole coil and reversing pole coil, turn to turn insulation of armature coil, reversing piece, piece to piece insulation, and insulation between wire turns of the same coil
5.2 layer to layer insulation of motor insulation material; layer to layer insulation of main pole winding, front and rear end sections of armature winding, insulation between upper and lower layers of slot part, insulation between upper and lower layers of coil
5.3 insulation to ground of motor insulation material: it refers to the insulation between each winding of motor to base and other uncharged parts, the insulation to ground of reversing pole coil of main pole coil, the insulation to ground of armature winding and commutator
The live parts in the motor shall be isolated from the base, iron core and other non live parts to avoid breakdown to the ground.
5.4 external insulation of motor insulation material: the insulation wrapped outside the ground insulation is mainly used to protect the ground insulation from mechanical damage and make the whole coil solid and flat, which also plays a reinforcing role in the ground insulation
5.5 filling insulation of motor insulation materiale: fill the gap of the coil, make the whole coil firmly form a whole, reduce the vibration, and make the coil forming regular and flat, so as to facilitate the binding of ground insulation
Conducive to heat dissipation
5.6 pad insulation ofmotor insulation material: protect the insulation structure from mechanical damage during process operation
5.7 commutator insulation of motor insulation material: Commutator insulation, commutator group to ground insulation, V-shaped mica ring and mica sleeve between commutator group and compression ring, multi-layer high-quality shellac plastic mica
6、 Stator bar conductor motor insulation material: row insulation, transposition insulation, transposition filling.
7、 Rotor insulation of Hydrogenerator: turn to turn insulation, pole plate, pole body insulation.

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