The 5 factors that lead to the corona discharge of high-voltage motors are that they are making trouble!
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High-voltage motors are prone to corona problems if the insulation structure itself is defective or there are problems in the manufacturing process such as coil wrapping, shaping or end fixing. Today, Dalan motor manufacturers will introduce you to the 5 factors that lead to corona discharge.
(1) Quality problems in the material itself. For example, the thickness of the electromagnetic wire insulation layer, the uneven thickness of the mica tape, and the non-conformity of the high and low resistance anti-corona materials result in poor overall insulation of the coil.
(2) In the process of coil insulation packaging, if it can not be processed according to the stacking requirements of the process requirements, it may result in insufficient thickness of the local insulation of the coil. If manual wrapping is used, the consistency of the stacking will be worse and tensioned The degree is also inconsistent, which may lead to the final treatment effect of the insulation.
(3) The anti-corona material is damaged during the wire embedding process. In the actual observation process, it was found that the low resistance band was damaged during the wire embedding process. This is undoubtedly the cause of corona, and eventually the hidden quality of the discharge of the motor during operation.
(4) Unsuitability in the process of thread embedding. The very important part of the high-voltage motor stator embedding process is that the gap in the slot should be sufficiently small during the embedding process. It is necessary to achieve this requirement by plugging insulating sheets and other measures. Actual observation found that there may be untreated gaps in the embedding process. Another problem in this link is that there is deformation of the shaped coil, which will cause the gap between the winding and the edge of the slot to be uneven after the coil is embedded in the slot, leaving uneven quality and improper quality impregnation.
(5) Factors in the dipping process. During the dipping process, the viscosity of the paint, the pre-baking temperature of the winding blank, the dipping pressure, and drying will directly affect the insulation curing effect of the winding.
All in all, whether it is the production of coils, the inlay processing of the stator, or the dipping and drying process, these are the key links in the production and manufacture of high-voltage motors. Therefore, scientific and reasonable production and manufacturing processes strictly Good process control is the only way to avoid this problem.
----- Responsible Editor: Dalan Oil Pump Motor 02-Procurement Consultant
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