Rotor, axial gap type motor, driving method of motor, compressor

Abstract

A rotor, an axial gap type motor comprising the rotor having reverse salient polarities and rotatable around a prescribed axis, a motor driving method, and a compressor. A plurality of magnets (12a, 12b) are annularly disposed on a substrate (11) with their polarities set symmetrical about a shaft hole (10). For example, the magnets (12a, 12b) present N-poles and S-poles on their stator side (toward you from paper surface). The plurality of magnetic substances (13a, 13b) are disposed vertically to the rotating axis direction, more specifically, extendedly between the magnets (12a, 12b).

Description

technical field

[0001] The present invention relates to an electric motor, in particular to an axial gap type electric motor in which the gap between a stator and a rotor is arranged along a plane perpendicular to the rotating shaft. Background technique

[0002] Conventionally, radial gap motors in which a gap between a stator and a rotor is provided along a cylindrical surface parallel to the rotating shaft have been used in many applications requiring high output, such as compressors and machine tools. However, with recent improvements in the performance of magnetic materials and the like, studies have begun to apply axial gap motors to compressors and the like.

[0003] This study was proposed in response to the desire to solve the problem of increased gap and eddy current loss, such as stainless steel tubes used to prevent permanent magnets from flying due to centrifugal force, and the desire to apply flat-plate magnets to cylindrical rotors of.

[0004] Patent Docume...

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