Permanent magnet rotating machine

Abstract

A permanent magnet rotating machine having a high space utilization efficiency which can be used in a power generation facility such as a wind power generation facility and can easily enlarge the capacity of an axial gap rotating machine. The permanent magnet rotating machine (1) comprises two stage end rotors (3) having a rotating shaft (2), two end rotary boards arranged at an interval in the axial direction of the rotating shaft (2), and permanent magnets (6) arranged on the opposing surfaces of the two end rotary boards and rotatable integrally with the rotating shaft, an internal rotor (5) of at least one stage having a rotary board arranged in an air gap formed by the two stage end rotors at an interval, and a permanent magnet (7) supported on the rotary board and rotatable integrally with the rotating shaft, and a stator (4) of at least two stages having a fixed board arranged in each air gap formed by the end rotor (3) and the internal rotor (5) and a stator coil (8) supported on the fixed board and separated from rotation of the rotating shaft. The permanent magnets have the magnetization direction in the axial direction of the rotating shaft (2) and they are arranged in regular interval (6a, 6b, 7a, 7b) to have the number of poles of 4 or more on a circumference of each of two or more concentric circles of different diameter having the rotating shaft as the center in each rotary board of the end rotor (3) and the internal rotor (5). Three or more stator coils (8) are arranged in regular interval (8a, 8b) on each circumference of concentric circles having different diameters of the fixed board corresponding to the concentric circles of different diameter of each rotary board where the permanent magnets are arranged.

Description

technical field [0001] The present invention relates to a permanent magnet rotating electric machine which can be used in a motor or a generator. More specifically, it relates to an axial gap type permanent magnet rotating electrical machine in which a rotor and a stator are opposed to each other along a rotation axis direction. Background technique [0002] There are many types of rotating electrical machines that can be used as motors or generators. In particular, rotating electrical machines usable for generators may include coil type motors that use coils to generate a magnetic field or prototype motors that use permanent magnets to generate a magnetic field. [0003] Although both types have advantages and disadvantages, if power generation efficiency is considered, a permanent magnet rotating electrical machine using permanent magnets to generate a magnetic field is adopted. The reason for this is that, in the case where the two types of generators are compared with ...

AI Technical Summary

Problems solved by technology

However, magnetized magnets are difficult to assemble due to the magnetic repulsion of like-named poles

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