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Power generation element and power generation apparatus provided with power generation element 実績あり

外国特許コード F130007649
整理番号 2009-0036EP
掲載日 2013年10月7日
出願国 欧州特許庁(EPO)
出願番号 11795381
公報番号 2573931
公報番号 2573931
出願日 平成23年6月9日(2011.6.9)
公報発行日 平成25年3月27日(2013.3.27)
公報発行日 平成27年9月23日(2015.9.23)
国際出願番号 JP2011003276
国際公開番号 WO2011158473
国際出願日 平成23年6月9日(2011.6.9)
国際公開日 平成23年12月22日(2011.12.22)
優先権データ
  • 特願2010-139930 (2010.6.18) JP
  • 2011JP003276 (2011.6.9) WO
発明の名称 (英語) Power generation element and power generation apparatus provided with power generation element 実績あり
発明の概要(英語) The present invention provides a power generation element which has strong resistance to bending and impact and has high power generation capacity, and a power generation apparatus including the power generation element.
The power generation element (1) includes: a first magnetostrictive rod (11a) made of a magnetostrictive material; a rigid rod (11b) made of a magnetic material and disposed in parallel with the first magnetostrictive rod (11a), the magnetic material having rigidity and a shape that enable uniform application of compression force or tensile force to the first magnetostrictive rod (11a); a first coil (12c) wound around the first magnetostrictive rod (11a); and two connecting yokes (10a and 10b) each of which is provided at one end of each of the first magnetostrictive rod (11a) and the rigid rod (11b) to connect the first magnetostrictive rod (11a) and the rigid rod (11b), wherein the power generation element (1) generates power through expansion or contraction of the first magnetostrictive rod (11a) due to vibration in a direction perpendicular to an axis direction of the first magnetostrictive rod (11a).
特許請求の範囲(英語) [claim1]
1. An electrical power generation element, comprising: a first magnetostrictive rod (11a) made of a magnetostrictive material; a rigid rod (11b) made of a magnetic material and disposed in parallel with the first magnetostrictive rod, the magnetic material having rigidity and a shape that enable uniform application of compression force or tensile force to the first magnetostrictive rod; a first coil wound (12a) around the first magnetostrictive rod (11a); and two connecting yokes (10a, 10b) each of which is provided at one end of each of the first magnetostrictive rod and the rigid rod to connect the first magnetostrictive rod and the rigid rod, a first of said connecting yokes (10a) being fixed and a second of said connecting yokes (10b) being movable, characterized in that the power generation element is configured to generate electrical power through expansion or contraction of the first magnetostrictive rod due to application of a bending force to the second of said connecting yokes (10b) caused by vibration in a direction perpendicular to an axis direction of the first magnetostrictive rod.
[claim2]
2. The electrical power generation element according to Claim 1,
wherein the rigid rod is a second magnetostrictive rod made of a magnetostrictive material,
the power generation element further includes a second coil wound around the second magnetostrictive rod, and
the power generation element generates power through expansion of one of the first magnetostrictive rod and the second magnetostrictive rod and contraction of the other due to vibration in a direction perpendicular to an axis direction of the first magnetostrictive rod and the second magnetostrictive rod.
[claim3]
3. The electrical power generation element according to Claim 1,
wherein an easy magnetization direction of the first magnetostrictive rod is in parallel with the axis direction of the first magnetostrictive rod.
[claim4]
4. The electrical power generation element according to Claim 2,
wherein an easy magnetization direction of the first magnetostrictive rod and the second magnetostrictive rod is in parallel with an axis direction of the first magnetostrictive rod and the second magnetostrictive rod.
[claim5]
5. The electrical power generation element according to any one of Claims 1 to 4, further comprising
a magnet having a back yoke.
[claim6]
6. The electrical power generation element according to any one of Claims 1 to 5,
wherein the second of the two connecting yokes has a weight.
[claim7]
7. The electrical power generation element according to any one of Claims 1 to 6,
wherein the power generation element resonates in a second resonant mode.
[claim8]
8. The electrical power generation element according to Claim 6,
wherein the weight has a shape that is longer in the axis direction of the magnetostrictive rod than in the direction perpendicular to the axis direction of the magnetostrictive rod.
[claim9]
9. The electrical power generation element according to Claim 1,
wherein when the number of turns of the first coil is N, the first coil includes K coils connected in parallel and each having N/K turns.
[claim10]
10. The electrical power generation element according to Claim 2,
wherein when the number of turns of each of the first coil and the second coil is N, the first coil and the second coil each include K coils connected in parallel and each having N/K turns.
[claim11]
11. The electrical power generation element according to one of Claims 1 and 2, further comprising
a plurality of power generation elements including the power generation element that are disposed in parallel,
wherein the power generation elements are connected in series.
[claim12]
12. The electrical power generation element according to any one of Claims 1 to 11,
wherein the magnetostrictive material has ductility.
[claim13]
13. The electrical power generation element according to any one of Claims 1 to 12,
wherein the magnetostrictive material is an iron-cobalt alloy.
[claim14]
14. The electrical power generation element according to Claim 1 in which the rigid rod and the two connecting yokes are formed into a single entity.
[claim15]
15. An electrical power generation apparatus, comprising
the electrical power generation element according to any one of Claims 1 to 14.
  • 出願人(英語)
  • KANAZAWA NATIONAL UNIVERSITY
  • 発明者(英語)
  • UENO TOSHIYUKI
  • IKEHATA YOSHIO
  • YAMADA SOTOSHI
国際特許分類(IPC)
指定国 Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
(有)金沢大学ティ・エル・オーは、金沢大学の研究者の出願特許を産業界へ技術移転することを主目的として、金沢大学の教官の出資により設立された技術移転機関です。
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