The motor for the hydraulic oil pump is inseparable from the insulating paint. The composition and manufacturing technology of insulating varnish have been continuously updated and improved. The methods and means of designing and manufacturing motors are also changing rapidly, which promotes the wide application of high temperature and high power density motors that originally stayed in the design restricted area. Today, Dalan Motor Xiaobian also joined in the fun, and talked with everyone about insulating paint.
Motor insulation paint can be divided into five categories according to the scope of use: impregnating varnish, enameled wire lacquer, covering lacquer, silicon steel lacquer and anti-corona lacquer. Anti-corona paint is generally only used on high-voltage motors.
Impregnating paint:
Impregnating varnishes are divided into two types: solvent lacquer and solventless lacquer. They are mainly used to impregnate motor windings (stator windings and wound motor rotor windings) to fill their gaps and micropores, and to form a continuous flat surface on the winding surface after curing. The film is cured and cured into a hard whole. The viscosity, fluidity, solid content, dryness, and adhesion of the impregnating varnish directly affect the performance of the motor.
Enameled wire paint:
The enameled wire is a common electromagnetic wire for motors, and the enamelled wire lacquer is mainly used for coating insulation of enameled wire cores. Motor manufacturers should pay special attention to the control of enameled wire. Some motor manufacturers are equipped with the necessary testing equipment. The continuity of the film, twist peeling, scratch resistance, and voltage resistance can verify the film. Overall performance.
Cover paint:
The cover paint is used to coat the impregnated coil and the insulating component, and a uniform thickness of the insulating protective layer is formed on the surface thereof to prevent the mechanical insulation of the device from being damaged by the mechanical and chemical substances and the surface insulating strength. Therefore, the cover paint is required to have the characteristics of quick drying, strong adhesion, hard paint film, high mechanical strength, moisture resistance, oil resistance and corrosion resistance.
Silicon steel sheet paint:
Silicon steel sheet is also the main raw material of the motor. Silicon steel sheet paint is used to coat silicon steel sheet to reduce the eddy current loss of the core and enhance corrosion resistance. After the silicon steel sheet paint is applied, it needs to be dried at a high temperature for a short time. It is characterized by thin layers, strong adhesion, hardness, smoothness, uniform thickness, oil resistance, moisture resistance and good electrical performance.
Anti-corona paint:
Corona discharge is a discharge phenomenon in which a localized air is ionized to generate a blue halo in a highly inhomogeneous electric field. For example, it is used for coil ends with high voltage in large high voltage motors. Many motor manufacturers apply anti-corona paint on the surface of the stator and rotor and the rotor after spraying.
----- Editor-in-Chief: Dalan Oil Pump Motor 02-Procurement Consultant
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