Four-in-one mica tape and insulating method for applying same to motor leading-out wire connection part

Abstract

The invention discloses a four-in-one mica tape, which comprises a first polymer thin film, a reinforced fiber cloth, mica paper and a second polymer thin film, wherein the layers of materials are adhered by using a high temperature resistant adhesive. The invention further discloses an insulating method for applying the four-in-one mica tape to a motor leading-out wire connection part. The four-in-one mica tape provided by the invention replaces ordinary mica tapes and serves as wrapping insulation materials for the leading-out wire connection part, has excellent flexibility, is tightly attached to the leading-out wire connection part of a high-voltage motor, is high in tensile strength, and is not prone to crumple; further, the internal structure of the four-in-one mica tape is even, compact and voidless, is not prone to be layered, and has good moisture-proof effect. By adopting the insulating method provided by the invention, the insulation structure of the leading-out wire connection part is fully sealed and insulated integrally, the interior of the insulation structure is compact and voidless, and partial discharge cannot be produced.

Description

technical field [0001] The invention relates to the insulation structure of the connection part of the lead wire of a high-voltage motor, in particular to a four-in-one mica tape and its insulation method at the connection part of the lead wire of the motor. Background technique [0002] Lead cables are generally used to connect the high-voltage motor windings to the power supply, so the insulation treatment of the connection part of the lead wire is very critical, and its insulation performance is directly related to the reliability and safety of the motor operation. Since the motor stator winding adopts the overall VPI process, most motor factories generally adopt the method of ordinary glass cloth reinforced mica tape to wrap and then apply insulating paint to the insulation treatment of the connection part of the lead wire. This method is to process the overall VPI process. After the stator winding is assembled into the frame, the connection between the stator winding le...

AI Technical Summary

Problems solved by technology

[0003] Due to the limitation of the position and size of the lead-out wire, the insulation treatment method of the connection part of the lead-out wire is easy to wrinkle, break, disobey, uneven, and not dense when the mica tape is wrapped around the mica tape. internal voids due to uneven brushing and poor permeability of the mica tape

During the operation of the motor, the insulation of the connection part of the lead wire is affected by mechanical vibration, electromagnetic force and thermal stress, which is prone to cracks, mica tape delamination, looseness, moisture absorption, partial discharge and other phenomena, which seriously affect the electrical performance of the motor. The insulation resistance decreases, which ultimately affects the service life of the motor

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