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Electromagnetic device

An electromagnetic device and magnetic field technology, applied in the direction of electromechanical devices, magnetic circuits, electrical components, etc., can solve problems such as vibration and noise, complex rotor structure, difficult heat dissipation, etc., and achieve the effects of suppressing increase, easy heat dissipation, and suppressing heat generation

Active Publication Date: 2020-04-21
KOGAKUIN UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, in a motor using a double Halbach array field magnet, the structure of the rotor is complicated, and there is concern that vibration and noise may be generated during high-speed rotation
[0010] In addition, in a motor using a double Halbach array field, since the armature coil is arranged in the rotor with a double cylinder structure, it is difficult to dissipate heat, and the heat generation of the armature coil may become a problem

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0057] figure 1 The main part of the three-phase AC motor (hereinafter referred to as the motor 10 ) as the electromagnetic device according to Embodiment 1 is shown in plan view in the axial direction. The motor 10 includes a magnetic field 12 and an armature 14, and the magnetic field 12 and the armature 14 are accommodated in an unillustrated case (casing).

[0058] The magnetic field 12 is formed by a substantially cylindrical outer magnetic field portion 16 forming an outer magnetic field and an inner magnetic field portion 18 forming an inner magnetic field. The inner diameter of the outer magnetic field part 16 is larger than the outer diameter of the inner magnetic field part 18, and in the magnetic field 12, the outer magnetic field part 16 and the inner magnetic field part 18 are coaxial, and the inner magnetic field part 18 is housed in the outer magnetic field part 16 and integrated. In addition, the armature 14 has a substantially cylindrical shape, and the inner...

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PUM

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Abstract

Provided is an electric motor wherein three-phase coils are disposed on an armature positioned between an outer field portion and an inner field portion, and Halbach magnet arrays are used in the outer field portion and the inner field portion. In each of the Halbach magnet arrays, any one of numbers, which are multiples of 3 plus 2, is adopted as a partition function, and permanent magnets are arranged such that the magnetization directions thereof are sequentially changed by an angle that is obtained by dividing one cycle of the electrical angle by the partition function. As a result, the torque ripple of the electric motor is suppressed.

Description

technical field [0001] The present invention relates to an electromagnetic device, such as a rotating electrical machine. Background technique [0002] Rotary electrical machines such as rotary motors and generators, and electromagnetic devices such as linear motors use field magnetism in which N poles and S poles of permanent magnets are alternately arranged (NS array field magnetism). In NS array field magnetism, since magnetic fields are generated on both sides of the aligned magnets, the magnetic fields generated by the permanent magnets cannot be effectively utilized. [0003] On the other hand, there is a Halbach array magnet as a method for arranging permanent magnets to enhance the magnetic field generated by field magnetism. The Halbach array magnet is a magnet arrangement method in which the magnetic poles (magnetization direction) of the permanent magnets are rotated 90° sequentially and arranged, and a strong magnetic field can be generated on one side of the ma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K21/14H02K41/03
CPCH02K1/278H02K41/031H02K2213/03H02K21/14H02K16/02H02K1/2786H02K3/47
Inventor 森下明平
Owner KOGAKUIN UNIVERSITY
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