Motor, stator and stacked riveted magnetic slot wedge

Abstract

The invention discloses a stacked riveted magnetic slot wedge. The slot wedge comprises a number of magnetically conductive sheets which are stacked in the axial direction into a whole body and arranged into the iron core slot of a stator iron core to compress a stator winding therein. Stacked riveting points which are used to form uneven riveting between two adjacent magnetically conductive sheets are arranged on the surfaces of the magnetically conductive sheets. Holes used for reducing tangential magnetic leakage are arranged in the middle of the surfaces of the magnetically conductive sheets. According to the invention, a number of stacked riveting points are arranged on the surfaces of the magnetically conductive sheets; two adjacent magnetically conductive sheets are unevenly overlapped through respective corresponding riveting points, and riveted and fixed; holes are arranged in the middle areas of the surfaces of the magnetically conductive sheets and mainly used to cut the tangential magnetic path; tangential magnetic leakage is effectively reduced; and the load capacity of a motor is improved. The invention further discloses a stator and the motor, which has the beneficial effects.

Description

technical field [0001] The invention relates to the technical field of motors, in particular to a riveting-stacked magnetic slot wedge. The invention also relates to a stator and an electric machine. Background technique [0002] For high-power motors, in order to securely fix the coil and facilitate wire embedding, the iron core is usually slotted to fix the coil in the iron core slot. Since there is a gap for the coil to be embedded in the slot of the iron core, the distribution of the air-gap magnetic field near the slot of the iron core and the top of the tooth is distorted, resulting in stray loss, which reduces the efficiency of the motor, increases the temperature rise of the motor, and aggravates the temperature of the motor. Electromagnetic noise and vibration, causing insulation and bearing life reduction. [0003] The production and promotion of high-efficiency motors is a concrete manifestation of environmental protection and energy saving in practical applicat...

AI Technical Summary

Problems solved by technology

[0005] Magnetic slot wedges can effectively weaken the adverse effects of motor cogging by reducing the air gap magnetic field pulsation near the teeth and slots. However, magnetic slot wedges also have disadvantages that cannot be ignored.

Generally, magnetic slot wedges have magnetic flux leakage along the tangential direction of the motor, which makes the electrical performance of the motor slightly lower, mainly manifested in the reduction of maximum torque and starting torque, and the reduction of load capacity.

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