Permanent magnet machine outer rotor structure

Abstract

The invention discloses a permanent magnet machine outer rotor structure, which belongs to the technical field of permanent magnet generators. The permanent magnet machine outer rotor structure comprises a rotor shell composed of an outer steel ring and a rear end surface arranged on one side of the outer steel ring; the rotor shell rotatably sleeves a stator; the inner wall of the outer steel ring is provided with a plurality of equidistant and annularly-distributed magnetic steels; two adjacent magnetic steels are separated by a non-magnetically conductive partition plate; one end, far awayfrom the rear end surface, of the outer steel ring is provided with a plurality of anti-separating mechanisms; the anti-separating mechanisms are equidistantly and annularly distributed outside the outer steel ring; the anti-separating mechanism comprises a fixing plate, a fixing bolt and a roller; one end of the fixing plate is in rotary connection with the surface of the outer steel ring througha rotating shaft, and the rotary connection is fixed through the fixing bolt; and one surface, close to the rear end surface, of the fixing plate is provided with the roller. As the non-magneticallyconductive partition plate fills the gap between the magnetic steels, the magnetic steels are more stable and durable.

Description

technical field [0001] The invention relates to the technical field of permanent magnet generators, in particular to an outer rotor structure of a permanent magnet generator. Background technique [0002] In today's DC motors, the excitation method that uses DC current to generate the main pole magnetic field is called current excitation; if permanent magnets are used instead of current excitation to generate the main pole magnetic field, this type of motor is called a permanent magnet motor, and permanent magnet power generation The machine has the advantages of small size, low loss, high efficiency, etc. It is very necessary to study it today when energy saving and environmental protection are paid more and more attention. Brushless can be achieved in many cases, so it is mostly used in small and micro motors. When using variable frequency power supply, permanent magnet motor can also be used in variable speed transmission system. With the continuous improvement and impr...

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Problems solved by technology

[0003] The permanent magnet generator relies on the relative movement between the rotor and the stator to realize the coil cutting the magnetic induction line to generate current. When the rotor and the stator of the permanent magnet generator cooperate, some use the inner rotor and some use the outer rotor. The principle of power generation is the same, but the installation position of the rotor is different. During the use of the traditional outer rotor permanent magnet generator, the outer rotor bears the pressure of the entire motor shaft, and the magnetic steel installed on the inner wall of the outer rotor is easily squeezed and damaged. The service life of the outer rotor is reduced, and when the outer rotor and the inner stator are installed, in order to prevent the outer rotor from falling off, the two will be snap-connected, but this will affect the smoothness of the outer rotor rotation and easily cause the wear of the inner stator

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