Collimating Halbach array external-rotor permanent magnet synchronous gearless traction machine

Abstract

The invention discloses to a collimating Halbach array external-rotor permanent magnet synchronous gearless traction machine, relating to the technical field of a gearless traction machine. The gearless traction machine comprises a machine seat, a rotary shaft, an outer rotor, an inner stator, a traction machine and a brake, wherein the outer rotor comprises a magnet installation rack and a permanent magnet, the magnet installation rack is arranged on the rotary shaft, the permanent magnet is arranged at the outer periphery of the inner stator and between the inner stator and an outer shell along a collimating Halbach array in an encircled way, and is fixedly connected with the magnet installation rack, the collimating Halbach permanent magnet array is formed by fixing a regular-polygon prismatic permanent magnet on the permanent installation rack of the outer rotor, the regular-polygon prismatic permanent magnet has n sides at the bottom surface, and n is an integer more than 3. The collimating Halbach array external-rotor permanent magnet synchronous gearless traction machine is low in processing difficulty and high in magnet consistence; harmonic component of an air-gap field is reduced, magnetic field distribution is more approximate ideal sine, sectional side length of the magnet is reduced, and thickness of the rotor is substantially reduced; on the condition of ensuring strength, rotational inertia of the rotor is reduced, the whole weight of the traction machine is reduced, and control accuracy can be improved.

Description

technical field [0001] The present invention relates to the technical field of gearless traction machines. Specifically, it is a traction machine with simple structure, good manufacturability, convenient processing, high utilization rate of permanent magnet materials, high transmission efficiency, less noise, stable operation, easy control and low cost. Quasi-Halbach array permanent magnet synchronous gearless traction machine. Background technique [0002] The traction machine is the core executive component of the elevator, and its performance directly affects the comfort, safety and energy-saving effect of the elevator operation. Generally speaking, the development history of traction machines has experienced the development process from geared to gearless. At the beginning of the 20th century, the American OTIS company invented the traction machine driven by friction traction. This type of traction machine is small in size and highly versatile, so it became the ...

AI Technical Summary

Problems solved by technology

In the existing motors using Halbach permanent magnet arrays, arc-shaped magnets with different magnetization directions are pasted and fixed on the surface of the rotor to form a quasi-Halbach array. The quasi-Halbach array of this structure requires at least four arc-shaped magnets. Magnetization in one direction requires complex magnetization equipment, high manufacturing cost, complex magnetization operation, time-consuming and laborious, low power utilization rate, and waste of energy

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