Skewed rotor core and manufacturing method thereof and motor comprising skewed rotor core

Abstract

The invention relates to a skewed rotor core which comprises a rotating shaft and a skewed rotor core, wherein the skewed core consists of two or more than two one-way skewed cores; the two adjacent one-way skewed cores have different inclined directions; an inflection point is formed at the intersection of adjacent two skewed slots; and the one-way skewed cores is formed by laminating rotor sheets. By adoption of a connecting key groove through which the one-way skewed rotor core in each skewed section is laminated and correspondingly the one-way skewed rotor core in a skewed section is generally processed, each rotor sheet can be directly punched on a common punch press, so that the processing period and cost are greatly reduced. The invention relates to a motor comprising the skewed rotor core, and a method for manufacturing the skewed rotor core.

Description

technical field [0001] The invention relates to the field of motors, in particular to a skewed rotor iron core, a manufacturing method thereof and a motor including the iron core. Background technique [0002] The conventional chute rotor core is a unidirectional chute rotor core, including the shaft and the chute rotor core. Laminated on the iron core shaft sleeve, the two become one and then set on the rotating shaft together. After manufacturing and forming, the iron core slot of the one-way inclined rotor iron core is an inclined slot in the axial direction, and the inclined slot of the iron core slot There is only one direction, that is, the axis of the iron core slot of the one-way skewed rotor core and the axis of the rotor core form an included angle in only one direction. This kind of unidirectional inclined slot rotor core, because the inclined slots all face one direction, although the higher harmonics of the motor with the conventional straight slot iron core ar...

AI Technical Summary

Problems solved by technology

[0009] The disadvantages of this existing conventional one-way skewed rotor core are as follows: on the one hand, the iron core slots and keyways of the rotor punching sheet of the one-way skewed rotor core are punched before lamination, and in order to Make sure that the iron core groove of the one-way skewed rotor core formed by laminating the rotor punching sheets is oblique in the axial direction, and the key groove is straight in the axial direction, then each rotor punching sheet needs to be punched twice. In addition, the skewed rotor core has high requirements on the skewed slot, so the punching equipment of the rotor punching is required to have high precision to ensure that the indexing of the skewed rotor core's skewed groove meets the requirements, resulting in the rotor punching Long processing cycle and high processing cost

On the other hand, the conventional one-way skewed rotor core is difficult to eliminate high-order harmonics and reduce the vibration and noise of the motor

Images