Asynchronous motor rotor core

Abstract

The invention discloses an asynchronous motor rotor core, and the asynchronous motor rotor core comprises a rotor core which is formed by the punching of a plurality of rotor core punching sheets in a row through a fine punching machine. The cross section of the rotor core is circular, and the center of the cross section is provided with a positioning shaft hole. A plurality of heat-dissipation holes are disposed around the positioning shaft hole, and buckling rivet holes formed by fine punching are disposed around the heat-dissipation holes in a discrete manner. The rotor core is uniformly provided with a plurality of closed grooves along the peripheral direction, wherein the closed grooves uniformly divide the rotor core punching sheets. Compared with the prior art, the rotor core can change a opened groove structure of a conventional asynchronous motor rotor core, and employs the closed groove structure, and employs the fine punching machine to enable the rotor core punching sheets to be buckled together through automatic buckling riveting and fine punching. The closed groove structure prevents an external circle from clamping aluminium after aluminium casting, and the rotor core punching sheets through the fine punching stacked buckling are high in precision. There is no need to cut the external circle, so the production cost is saved, the overall machining efficiency is high, and the rotor core is suitable for automatic batch production.

Description

technical field [0001] The invention relates to a motor rotor iron core, in particular to an asynchronous motor rotor iron core adopting a closed slot structure. Background technique [0002] The rotor core (magnetic core) plays a pivotal role in the entire motor. It is used to increase the magnetic flux of the inductance coil and realize the maximum conversion of electromagnetic power. It has a wide range of applications, such as stepper motors, AC and DC motors, geared motors, external rotor motors, shaded pole motors, and synchronous asynchronous motors. For the finished motor, the role of the motor iron core in the motor accessories is more critical. In order to improve the overall performance of a motor, it is necessary to improve the performance of the iron core. Usually this kind of performance can be solved by improving the material of the iron core punching sheet, adjusting the magnetic permeability of the material, and controlling the size of the iron loss. The ...

AI Technical Summary

Problems solved by technology

The rotor core structure of traditional asynchronous motors generally adopts an open slot structure, and aluminum is left on the outer circle after aluminum casting, which seriously affects the appearance and quality. After the rotor core punches are stacked together, the outer circle needs to be processed Allowance for further machining of the outer circle

Its disadvantages are: outer circle processing needs to configure equipment, site and personnel, and the input cost is high; one more cutting process increases labor costs and increases quality control costs; the overall efficiency is low, and it is not suitable for mass automated production

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