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Brushless DC motor with permanent-magnet disk and no iron core

A motor, ironless technology, applied in the direction of electromechanical devices, electrical components, etc., can solve the problem of low utilization rate of magnets, achieve the effect of improving efficiency and operation reliability, small armature inductance, and high space utilization

Inactive Publication Date: 2004-04-28
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The DC wave winding connection method is adopted, and there are only two branches. In comparison, the coil shape allows a slightly smaller magnetic flux for cross-linking, and the magnet utilization rate is slightly lower.

Method used

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  • Brushless DC motor with permanent-magnet disk and no iron core
  • Brushless DC motor with permanent-magnet disk and no iron core
  • Brushless DC motor with permanent-magnet disk and no iron core

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Embodiment Construction

[0014] Below in conjunction with accompanying drawing, the present invention is described in further detail:

[0015] like figure 1 As shown, the present invention includes shaft 2, bearings 3, 11, analog magnetic pole 4, position sensor 5, permanent magnet 7, armature disc 8, and housing 6; housing 6 includes end cover 10 and side wall 9. The bearings 3 and 11 are set on the shaft 2, the permanent magnet 7 is bonded to the end cover 10, the end cover 10 is connected with the bearings 3 and 11, and forms the motor rotor together with the permanent magnet 7; the armature disc 8 is fixed to the shaft 2 Connected, as the motor stator; the position sensor 5 is located at an appropriate position on the armature disk, that is, the position towards the axis, and its basic principle is not located under the main magnetic pole, so the thickness of the air gap can be reduced. The lead wire 1, the winding tap and the sensor lead wire are drawn out from the hollow part of the shaft 2 and...

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Abstract

A permanent-magnet DC disk-type motor without iron core and brush is composed of casing, permanent magnet adhered to casting to form primary magnetic pole, axle, bearing, armature whose coil is pressed to become a disk, and sensors arranged on said disk. Its advantages include low inductance of armature, hard characteristics, high over-load power, no loss of magnetic eddy and brush, high efficiency and long service life.

Description

technical field [0001] The invention belongs to the technical field of direct current motors, and in particular relates to a brushless iron-core direct current permanent disk motor, which is especially suitable for driving electric bicycles. Background technique [0002] In the prior art, most common disc motors adopt a brush and iron core structure, but there are many problems in this type of motor. For this reason, Chinese utility model patent 99245147 discloses a kind of " coreless DC permanent disk type motor " (disclosure date on August 16, 2000), and it mainly consists of shell, iron core, armature, commutator, electric brush , Shaft and bearings. The coil winding of the ironless armature is "heart-shaped", and several "heart-shaped" coil windings are stacked into a ring, and then molded with adhesive cured material into a thin disc shape. This motor overcomes some inherent shortcomings of iron-core motors, but still uses brushes for commutation, so there are contact...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02K29/06
Inventor 辜承林陈金涛
Owner HUAZHONG UNIV OF SCI & TECH
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