Fabrication method of motor stator core

Abstract

The invention discloses a fabrication method of a motor stator core. The fabrication method comprises the steps of 1) detecting a relation between actual compression quantity and lamination pressure of the stator core by a dial indicator under the effect of different and gradually-increased lamination pressure, and drawing a corresponding relation curve, wherein inter-sheet pressure is ensured by the lamination pressure; 2) setting initial lamination pressure on the basis of the corresponding relation curve, fastening the stator core according to standard fastening torque requirement of a bolt under the effect of the initial lamination pressure, releasing the pressure, detecting compression quantity and resilient quantity of the stator core by the dial indicator, calculating remaining compression quantity, and deducting an inter-sheet pressure value in the corresponding relation curve; and 3) judging whether the inter-sheet pressure vale conforms to design requirement or not, and executing the step 4) if the design requirement is not met; and 4) releasing the pressure, returning to the step 2), adjusting the initial lamination pressure again, and simultaneously adjusting a fastening force torque value of a screw rod until the design requirement is met by building and employing an analysis model between the actual compression quantity of the laminated core and the lamination pressure.

Description

technical field [0001] The invention relates to the technical field of manufacturing a stator core, in particular to a method for manufacturing a motor stator core. Background technique [0002] The bolt-connected stator core is different from the welded structure stator core. It is another platform in the stator core structure. The inter-plate pressure is mainly provided by the screw rods distributed around the circumference of the stator core. If the pressure between the plates does not meet the design requirements, there will be too much eddy current loss between the plates, and the performance of the motor will decrease. If the inter-sheet pressure is too large, it will damage the interlayer insulation of the core and also increase the loss. At the same time, the bolt tightening torque must meet the standard requirements. If it is too large or too small, it will affect the product quality and cannot meet the performance requirements of the motor. [0003] Therefore, ho...

AI Technical Summary

Problems solved by technology

If the pressure between the plates does not meet the design requirements, there will be too much eddy current loss between the plates, and the performance of the motor will decrease

If the inter-sheet pressure is too large, it will damage the interlayer insulation of the core and also increase the loss

At the same time, the bolt tightening torque must meet the standard requirements. If it is too large or too small, it will affect the product quality and cannot meet the performance requirements of the motor.

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