High PDIV corona-resistant enameled wire and preparation process thereof

Abstract

The invention discloses a high PDIV corona-resistant enameled wire and a preparation process thereof. The enameled wire comprises a core conductor, and the surface of the core conductor is coated witha reinforcing layer. The surface of the reinforcing layer is coated with a paint layer; a glass fiber layer and a rubber fiber layer are arranged in the reinforcing layer; and the glass fiber layer and the rubber fiber layer are intertwisted. The surface of the core conductor and the interior of the reinforcing layer are coated with a fireproof paint, the outside of the paint layer is coated withan insulating layer, the insulating layer is distributed outside the paint layer in a wrapping mode, the glass fiber layer and the rubber fiber layer are distributed inside the reinforcing layer in aspiral mode, and the surface of the reinforcing layer and the interior of the paint layer are coated with an insulating paint. According to the invention, the glass fibers and the rubber fibers are added into the production material and are stranded by using the prior art, so that the overall structural strength of the enameled wire can be enhanced, the enameled wire is not broken when being dragged, the toughness is good, and the overall quality is improved.

Description

technical field [0001] The invention relates to the technical field of enameled wire production, in particular to a high PDIV-resistant corona-resistant enameled wire and a preparation process thereof. Background technique [0002] PDIV is the acronym for PartialDischargeInceptionVoltage, which means partial discharge initiation voltage. If PDIV is high, it can prevent the occurrence of partial discharge. Wire corona discharge is the ionization phenomenon of the air around the wire under the action of a strong electric field. Its generation is related to the wire itself It is related to the conditions of the air around the wire (such as the number, size, and charge of ions in the air); the reason why the air around the wire is ionized is that the electric field strength on the surface of the wire exceeds a certain critical value (the actual operating voltage of the line is higher than When the corona critical voltage value is reached, the surface field strength also exceeds ...

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Problems solved by technology

[0002] PDIV is the acronym for PartialDischargeInceptionVoltage, which means partial discharge initiation voltage. If PDIV is high, it can prevent the occurrence of partial discharge. Wire corona discharge is the ionization phenomenon of the air around the wire under the action of a strong electric field. Its generation is related to the wire itself It is related to the conditions of the air around the wire (such as the number, size, and charge of ions in the air); the reason why the air around the wire is ionized is that the electric field strength on the surface of the wire exceeds a certain critical value (the actual operating voltage of the line is higher than When the corona critical voltage value is reached, the surface field strength also exceeds the critical field strength, and corona will occur), so that the original ions in the air have enough kinetic energy to hit other uncharged molecules, ionizing the latter, and finally forming air Partially conductive, partial discharge initiation voltage (PDIV), also known as critical voltage, is the voltage at which corona discharge begins to occur, and the corresponding electric field strength is called initial corona field strength or critical field strength. However, existing production The resulting enameled wire has poor toughness, is prone to fracture when dragged, and has low hardness, which limits the scope of application of enameled wire

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