JP2012238866A5 - Reactor and booster circuit - Google Patents
Reactor and booster circuit Download PDFInfo
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- JP2012238866A5 JP2012238866A5 JP2012156426A JP2012156426A JP2012238866A5 JP 2012238866 A5 JP2012238866 A5 JP 2012238866A5 JP 2012156426 A JP2012156426 A JP 2012156426A JP 2012156426 A JP2012156426 A JP 2012156426A JP 2012238866 A5 JP2012238866 A5 JP 2012238866A5
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- metal magnetic
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Description
（金属磁性粒子）
金属磁性粒子としては、鉄を50質量％以上含有するものが好ましく、例えば、純鉄(Fe)が挙げられる。その他、鉄合金、例えば、鉄(Fe)-シリコン(Si)系合金、鉄(Fe)-アルミニウム(Al)系合金、鉄(Fe)-窒素(N)系合金、鉄(Fe)-ニッケル(Ni)系合金、鉄(Fe)-炭素(C)系合金、鉄(Fe)-ホウ素(B)系合金、鉄(Fe)-コバルト(Co)系合金、鉄(Fe)-リン(P)系合金、鉄(Fe)-ニッケル(Ni)−コバルト(Co)系合金、及び鉄(Fe)-アルミニウム(Al)-シリコン(Si)系合金から選択される1種からなるものが利用できる。特に、透磁率及び磁束密度の点から、99質量％以上がFeである純鉄が好ましい。また、純鉄は、鉄合金と比較して安価であり、経済性にも優れる。
(Metal magnetic particles)
As a metal magnetic particle, what contains 50 mass% or more of iron is preferable, for example, pure iron (Fe) is mentioned. In addition, iron alloys such as iron (Fe) -silicon (Si) alloys, iron (Fe) -aluminum (Al) alloys, iron (Fe) -nitrogen (N) alloys, iron (Fe) -nickel ( Ni) alloy, iron (Fe) -carbon (C) alloy, iron (Fe) -boron (B) alloy, iron (Fe) -cobalt (Co) alloy, iron (Fe) -phosphorus (P) An alloy selected from an iron-based alloy, an iron (Fe) -nickel (Ni) -cobalt (Co) alloy, and an iron (Fe) -aluminum (Al) -silicon (Si) alloy can be used. In particular, from the viewpoint of magnetic permeability and magnetic flux density, pure iron in which 99% by mass or more is Fe is preferable. Moreover, pure iron is cheaper and more economical than iron alloys.
Claims (2)
前記コアは、絶縁被膜で覆った金属磁性粒子を加圧成形してなり、
前記金属磁性粒子は、
９９質量％以上がＦｅである純鉄からなり、
平均粒径が５０μｍ以上７０μｍ以下であり、
粒径の標準偏差（σ）と平均粒径（μ）との比である変動係数Ｃｖ（σ／μ）が０．４０以下であり、
円形度が０．８以上１．０以下であり、
前記絶縁被膜は、
リン化合物、ケイ素化合物、ジルコニウム化合物およびアルミニウム化合物からなる群より選択された少なくとも一種を含み、
前記絶縁被膜の平均厚みは１０ｎｍ以上１μｍ以下であり、
印加電流が０Ａの時のインダクタンスＬ ０Ａ に対する印加電流が８Ａの時のインダクタンスＬ ８Ａ の比（Ｌ ８Ａ ／Ｌ ０Ａ ）が０．７７以上であるリアクトル。
ただし、円形度は、無作為に抽出した１０００個以上の金属磁性粒子について断面を顕微鏡で観察し、各金属磁性粒子の面積および外周長さを算出し、以下の式により求めた値の平均値である。
円形度＝４π×金属磁性粒子の面積／金属磁性粒子の外周長さの２乗 A reactor comprising a core and a coil formed by winding a winding around the core,
The core, Ri greens and pressure molding the metal magnetic particles covered with an insulating film,
The metal magnetic particles are
99% by mass or more is made of pure iron Fe.
Average particle size is at 50 [mu] m or more 70μm or less,
Standard deviation of particle (sigma) as the ratio between the average particle diameter (mu) variation coefficient Cv (σ / μ) is 0.40 or less,
Ri der circularity of 0.8 to 1.0,
The insulating coating is
Including at least one selected from the group consisting of phosphorus compounds, silicon compounds, zirconium compounds and aluminum compounds,
The average thickness of the insulating coating is 10 nm or more and 1 μm or less,
A reactor in which the ratio (L 8A / L 0A ) of the inductance L 8A when the applied current is 8A to the inductance L 0A when the applied current is 0A is 0.77 or more .
However, the circularity is the average value of the values obtained by the following formulas by observing the cross section of 1000 or more metal magnetic particles randomly extracted with a microscope and calculating the area and outer circumference length of each metal magnetic particle. It is.
Circularity = 4π × area of metal magnetic particle / square of outer peripheral length of metal magnetic particle
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2012156426A JP5445801B2 (en) | 2012-07-12 | 2012-07-12 | Reactor and booster circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2012156426A JP5445801B2 (en) | 2012-07-12 | 2012-07-12 | Reactor and booster circuit |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2007235138A Division JP5050745B2 (en) | 2007-09-11 | 2007-09-11 | Reactor core, manufacturing method thereof, and reactor |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| JP2012238866A JP2012238866A (en) | 2012-12-06 |
| JP2012238866A5 true JP2012238866A5 (en) | 2013-06-20 |
| JP5445801B2 JP5445801B2 (en) | 2014-03-19 |
Family
ID=47461453
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2012156426A Expired - Fee Related JP5445801B2 (en) | 2012-07-12 | 2012-07-12 | Reactor and booster circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP5445801B2 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5732027B2 (en) * | 2012-12-10 | 2015-06-10 | 住友電気工業株式会社 | Compressed green body, manufacturing method of compacted body, heat treatment body and coil component |
| JP6330517B2 (en) * | 2014-06-30 | 2018-05-30 | Tdk株式会社 | Precursor for dust core, dust core, and electronic component |
| WO2020179377A1 (en) * | 2019-03-06 | 2020-09-10 | Ｊｆｅスチール株式会社 | Iron-based powder for powder magnetic core, and powder magnetic core |
| JP7456239B2 (en) | 2020-03-31 | 2024-03-27 | 株式会社村田製作所 | inductor |
| WO2024048499A1 (en) * | 2022-08-31 | 2024-03-07 | 戸田工業株式会社 | Soft-magnetic metal powder, production method for same, and resin composition |
| WO2024048500A1 (en) * | 2022-09-01 | 2024-03-07 | 戸田工業株式会社 | Soft magnetic metal powder having high spheroidization rate and method for manufacturing same |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5921527A (en) * | 1982-07-26 | 1984-02-03 | Tdk Corp | Iron oxide for soft ferrite and its manufacture |
| JP2001102207A (en) * | 1999-09-30 | 2001-04-13 | Tdk Corp | Method for production of dust core |
| JP4140461B2 (en) * | 2003-06-27 | 2008-08-27 | トヨタ自動車株式会社 | Reactor device |
| JP4289665B2 (en) * | 2003-07-30 | 2009-07-01 | 株式会社豊田中央研究所 | Reactor, reactor core and manufacturing method thereof |
| JP2006024869A (en) * | 2004-07-09 | 2006-01-26 | Toyota Central Res & Dev Lab Inc | Dust core and manufacturing method thereof |
| JP4613622B2 (en) * | 2005-01-20 | 2011-01-19 | 住友電気工業株式会社 | Soft magnetic material and dust core |
| JP2007092162A (en) * | 2005-02-03 | 2007-04-12 | Jfe Steel Kk | Highly compressive iron powder, iron powder for dust core using the same and dust core |
| JP4701797B2 (en) * | 2005-04-04 | 2011-06-15 | Ｊｆｅスチール株式会社 | Coated iron-based powder for dust core and dust core |
| JP4650073B2 (en) * | 2005-04-15 | 2011-03-16 | 住友電気工業株式会社 | Method for producing soft magnetic material, soft magnetic material and dust core |
| JP2007129093A (en) * | 2005-11-04 | 2007-05-24 | Sumitomo Electric Ind Ltd | Soft magnetic material and dust core manufactured by using same |
| JP2007180225A (en) * | 2005-12-27 | 2007-07-12 | Toyota Motor Corp | Fixing structure of reactor and electric apparatus unit |
-
2012
- 2012-07-12 JP JP2012156426A patent/JP5445801B2/en not_active Expired - Fee Related
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