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Claw-pole type generator

A generator and claw-pole technology, applied in synchronous machines, electrical components, electromechanical devices, etc., can solve problems such as reducing power generation efficiency, and achieve the effects of improving power generation efficiency, small size, and light weight

Inactive Publication Date: 2008-08-13
ICHINOMIYA ELECTRIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Since eddy currents are generated while alternating magnetic flux is generated in the stator yoke and iron core yoke, and this eddy current reduces power generation efficiency, it is necessary to suppress the generation of eddy currents in claw pole generators

Method used

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Examples

Experimental program
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Embodiment Construction

[0023] Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[0024] FIG. 1 shows the overall construction of a claw pole generator 100 according to an embodiment of the present invention. As shown in FIG. 1 , the claw pole generator 100 has a ring-shaped permanent magnet 101, two stator yokes 102L and 102R arranged opposite to the permanent magnet 101, and a core yoke magnetically connecting the stator yokes 102L and 102R. 103 and a coil 104 arranged around the core yoke 103 . The thus constituted claw pole generator 100 is fixed on the hub shaft 1 of any known bicycle wheel, and the claw pole generator 100 constitutes a bicycle hub generator. Although not shown in detail in FIG. 1, the hub shaft 1 is formed with a male thread / external thread, and the hub shaft 1 is fixed to a fork F for a bicycle wheel by a nut or the like.

[0025] A hub cover 2 is rotatably connected to the hub shaft 1 via a bearing 3 . The hub cap 2 has a ...

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Abstract

The claw-pole dynamo (100) comprising: a permanent magnet (101) arranged in circular form; two stator yokes (102L and 102R) which respectively have a plurality of claw-like pole pieces (21L and 21R), which are alternately aligned in parallel in the circumferential direction and are arranged so as to be opposed to the permanent magnet (101); a core yoke (103) connecting the stator yokes (102L and 102R) magnetically; and a coil (104) arranged around the core yoke (103). The stator yoke (102L and 102R) is composed by laminating a plurality of thin plate materials (25a-25f) having disk parts (250a-250f) and a plurality of pole pieces (251a-251f) extending in the axial direction at a predetermined interval in the circumferential direction from the peripheral edge of the disk parts (250a-250f) in the thickness direction.

Description

technical field [0001] The invention relates to a claw pole generator, in particular to a claw pole generator used for bicycles. Background technique [0002] A conventional claw-pole generator comprises a cylinder with a permanent magnet, two claw-pole stator yokes respectively having pole pieces arranged alternately and in parallel in the circumferential direction, and a core yoke magnetically connecting the stator yokes ( core yoke) and a coil arranged around the core yoke (see Japanese Patent Laid-Open No. 2991705). The claw pole generator includes permanent magnets as an outer rotor, a stator yoke as an inner stator, core yokes and coils. The rotation of the permanent magnet causes an alternating magnetic flux to be generated in the core yoke, so that a current flows through the coil to generate electricity. [0003] Since an eddy current is generated while alternating magnetic flux is generated in the stator yoke and the iron core yoke, and the eddy current reduces p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02K21/22H02K1/14H02K1/18
CPCH02K21/227H02K1/145
Inventor 秋田卯市
Owner ICHINOMIYA ELECTRIC