Turn-to-turn insulation structure for rotor pole coil of salient-pole synchronous motor

Abstract

The invention discloses a turn-to-turn insulation structure for a rotor pole coil of a salient-pole synchronous motor. The turn-to-turn insulation structure comprises coil straight line part turn-to-turn insulation and end part insulation, wherein the coil straight line part turn-to-turn insulation and the end part insulation adopt laminated glass fabric swatches; single-face polyimide film temperature-proof low-resin mica tapes are wrapped on the end part insulation every other turn in a semi folding mode, one more layer is additionally wrapped on the head turn and tail turn of a coil; the coils of each turn and laminated glass fabric swatch stepping bars are tightly embedded on the coil straight line part turn-to-turn insulation at intervals, and the stepping bars cover the end part insulation; and the single-face polyimide film temperature-proof low-resin mica tapes at the end part are subjected to vacuum pressure impregnation and then firmly bond with the coil turns together. The invention changes the turn-to-turn insulation structure to compound insulation from single insulation, thereby improving the insulation reliability of the pole coil and ensuring the safe operation of the motor.

Description

technical field [0001] The invention relates to a secluded pole synchronous motor, in particular to an inter-turn insulation structure of the rotor magnetic pole coil of the secluded pole synchronous motor. Background technique [0002] Synchronous motors with hidden poles are widely used in rolling mills, blowers, various pumps and AC units, as well as self-contained or mobile power supplies in factories, mines, ships and rural areas. The rotor pole coil of this type of motor mostly adopts a concentric bare wire flat-wound structure. Compared with the rotor pole coil of a salient pole synchronous motor, its notable feature is that the shape and size of the coil and the inter-turn insulation structure are determined after the embedded wire is completed. The inter-turn insulation structure of the similar hidden pole magnetic pole coil adopts a single insulation, that is, the linear part and the end of the coil are all made of laminated glass cloth. This kind of structure ha...

AI Technical Summary

Problems solved by technology

This structure has the following defects: 1. The end insulation is poor in compactness, which affects the insulation performance; 2. The insulation displacement or even falling of the end during operation will cause insulation failure

3. Poor adhesion between the end insulation and the turns, which affects the mechanical strength of the coil end

The existence of these defects reduces the insulation reliability of the magnetic pole coil, thus affecting the safe operation of the motor

Images