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Coreless motor

A motor, ironless technology, applied in the field of ironless motors, can solve the problems of hollow coil deformation, poor shock resistance, etc., and achieve the effects of reducing wear, improving thermal conductivity, and expanding contact area

Inactive Publication Date: 2008-03-19
SANKYO SEIKI MFG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, compared with a motor (see Patent Document 1) in which the air-core coil is mounted on a stationary end base (so-called stator), there is a problem that the air-core coil is deformed by centrifugal force, and when the motor is started or stopped, the rotor may The inertial effect makes the coil move, and the shock resistance is also poor

Method used

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Embodiment Construction

[0034] Next, the best mode for carrying out the present invention will be described with reference to the drawings.

[0035] Fig. 1 is a side sectional view showing the mechanical structure of an ironless motor 1 according to an embodiment of the present invention. In this embodiment, the coreless motor 1 is an inner-rotor structure with the motor shaft fixed, and as shown in FIG. 1 , mainly includes a rotor 10, a stator 30 and a dynamic pressure bearing 40 as a bearing.

[0036] In FIG. 1 , the rotor 10 of the coreless motor 1 includes a rotor hub 11 , a bearing sleeve 13 , a yoke 14 , a permanent magnet 15 and a back yoke 17 . The peripheral surface of the permanent magnet 15 is alternately magnetized with multi-pole N poles and S poles. The yoke 14 is arranged on the inner peripheral surface of the permanent magnet 15 .

[0037] In addition, the back yoke 17 is made of a magnetic material such as iron, and is formed in a substantially cylindrical shape covering the outer ...

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Abstract

A coreless motor may include: a rotor having a magnet whose circumferential face is magnetized to multiple poles; a stator for rotatably supporting said rotor with a bearing interposed between said stator and said rotor; a coreless coil which is opposed to said circumferential face of said magnet with a space interposed between said coil and said circumferential face and which has a plurality of effective conductors that contribute to torque generation and a plurality of connection conductors that connect the adjacent effective conductors; and a support member having a coil supporting portion that supports said coreless coil; wherein said coil supporting portion supports circumferential faces of said connection conductors to position said coreless coil in the radial direction.

Description

technical field [0001] The present invention relates to an ironless motor used as a power source of, for example, precision equipment, and more particularly, to an ironless motor which prevents deterioration of motor characteristics. Background technique [0002] In the past, for a small motor used as a power source such as precision equipment, there is a coreless motor (so-called inner rotor motor) in which an air-core coil is arranged on the inner surface of a cylindrical yoke and magnetized into a multi-pole The permanent magnet rotates internally with the yoke. This coreless motor has various advantages such as no cogging torque like that of a motor with an iron core, less commutation sparks, less electrical noise, less rotor inertia, and good reactivity. [0003] For example, the coreless motor disclosed in Patent Document 1 has: a cylindrical cage member fixed to a rotating shaft, and a rotor in which permanent magnets are arranged on the outer periphery of the cage m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K15/04H02K3/04H02K5/00
CPCH02K21/14H02K3/47H02K29/08H02K21/22
Inventor 草间健司
Owner SANKYO SEIKI MFG CO LTD