What are the benefits of insulating the motor insulation materials?
(1) Insulation treatment of motor insulation materials can improve the moisture resistance of motor insulation
Any insulating material must absorb moisture more or less in humid air. Such as electrical cardboard, etc., the moisture in the air easily penetrates into the interior of the insulating material along the capillary, so the performance of the insulating material is significantly reduced. Insulation treatment forms a smooth pinhole-free paint film or insulating sealing layer on the surface of the winding and coil, which can greatly reduce the intrusion of moisture and improve the moisture resistance of the motor.
(2) The insulation material of the motor is insulated to improve the heat resistance of the motor insulation
Before the motor insulation material is impregnated with insulating varnish, the material will decompose low molecular substances such as gas water molecules inside when the material is heated, and accompanied by oxidation, the material properties will change, such as reduced mechanical strength, reduced moisture resistance, and the material becomes brittle , Successive electrical properties such as insulation resistance and breakdown voltage decrease, this phenomenon is called the aging of insulation material, but the contact area between insulation material and air after insulation treatment is greatly reduced, the oxidation rate is greatly reduced, under the same service life , The operating temperature of the motor can be increased. Therefore, the heat resistance of the motor insulation is improved.
(3) The motor insulation materials has been insulated to improve the thermal conductivity of the motor
The motor insulation layer has a large number of air gaps, and the air gap has a low thermal conductivity. After the air gap is filled with impregnated paint, the thermal conductivity of the impregnated paint and the pouring body is better than that of the air gap, so the motor and electrical windings are increased accordingly. Heat conduction, so that the temperature rise of the motor will be greatly reduced. Experimental data shows that the temperature rise can be reduced by 10-20%.
(4) The motor insulation materials is insulated to improve the electrical and mechanical properties of the motor insulation
After the motor windings and coils are insulated, the windings and the iron core are bonded to form a solid whole. The paint film fills the gaps inside the windings and the slots. A certain thickness of insulating layer is formed on the winding heads. There are no gaps and moisture inside. It is not easy to enter, so the insulation resistance and breakdown voltage have been improved. At the same time, the winding and the iron core have no relative movement. They have sufficient mechanical strength to resist external vibration and stress, and withstand mechanical shocks during the motor assembly process, thus avoiding mechanical Damage to function.
After the motor winding is impregnated, the winding insulation system and the iron core form a sturdy whole, which reduces the mechanical vibration and electromagnetic force vibration caused by the motor during operation, and plays a role in strengthening the machine to avoid or between the wires The insulation structure is damaged due to loose vibration and displacement friction with the iron core groove wall. The organic insulating material inside the motor not only improves the heat resistance and electrical performance after being impregnated, but also improves the mechanical strength of the insulating material itself. When the insulating material is heated, the material will change and decompose to release gas, moisture and carbon, and the material will lose its flexibility. However, after the impregnation treatment, the process of cracking and hydrolysis under thermal conditions can be greatly delayed. The performance can be maintained for a long time. At the same time, the paint film formed by the insulating paint has a certain elasticity and adhesion in the hot state, which strengthens the bonding force between the materials and forms a solid whole, which greatly improves the strength of the system.
(5) The motor insulation materials is insulated to improve the chemical resistance
After the motor is immersed, it can prevent direct contact between the insulating material and various solvents and corrosive chemicals around the motor, which can improve the stability of the chemical resistance of the motor. Due to the insulation encapsulation, the contact with the external foreign body is blocked , Improve the stability of the winding, choose the appropriate material can also make the winding insulation has anti-mildew, anti-oil, anti-corona, flame retardant and other properties.