Bearingless induction motor with square stator

Abstract

The present invention discloses a bearingless induction motor with a square stator. The section of the outer wall of a square stator is square, 24 stator slots are uniformly arranged on the square stator along a peripheral direction, the 24 stator slots are formed by 8 same big slots, 8 same middle slots and 8 same small slots; each two of the big slots, the middle slots and the small slots forms one group to be symmetrically arranged relative to the diagonal line of the square, the big slots are closest to the position of the diagonal line, the middle slots are located at the middle position, and the small slots are farthest away from the diagonal line; and each small slot is internally provided with a small slot torque winding, the inner layer of each middle slot is internally provided with a middle slot torque winding, and the outer layer of each middle slot is internally provided with a middle slot suspension winding, the inner layer of each big slot is internally provided with a big slot torque winding, and the outer layer of each big slot is internally provided with a big slot suspension winding. The bearingless induction motor with a square stator fully utilizes square silicon steel raw materials to further reduce the size of the bearingless motor so as to further improve the critical speed of rotation and ensure the normal output of the torque and the power density of the bearingless induction motor.

Description

technical field [0001] The invention belongs to the field of electric transmission equipment, in particular to a bearingless asynchronous motor supported by a magnetic bearing. Background technique [0002] Bearingless asynchronous motors are mainly supported by magnetic bearings, which have a long service life, no mechanical friction and wear, and no lubrication. They also break through the limitations of higher speed and high power, and broaden the application range of high-speed motors. The bearingless asynchronous motor is composed of a stator, a rotor and a winding. The stator is slotted to form a stator pole. There is a suspension winding in the stator slot. The radial suspension adopts the radial suspension winding stacked in the slot. At present, the stators of bearingless asynchronous motors are all circular. During the stamping process of the stator, the square silicon steel sheet is made into a circular structure. The corners of the square are wasted and cannot be...

AI Technical Summary

Problems solved by technology

At present, the stators of bearingless asynchronous motors are all circular. During the stamping process of the stator, the square silicon steel sheet is made into a circular structure. The corners of the square are wasted and cannot be effectively used; the stator is circular. Although the suspension winding of the motor does not occupy additional axial space, it occupies the space of the motor slot, which makes the temperature of the motor rise, and the power density is lower than that of ordinary motors with the same speed.

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