Flux Control Mechanism and Application of Magnetic Fluid.

磁流体的通量控制机理及应用。

• 批准号: 08044113
• 负责人: OKA Hideo
• 金额: $ 5.06万
• 依托单位: Iwate University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for international Scientific Research
• 财政年份: 1996
• 资助国家: 日本
• 起止时间: 1996 至 1997
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-08044113/
• 关键词: Magnetic Fluid; Inductor; Permeability; Variable Inductor; High frequency; Power device; Complex permeability; Power circuit; 磁性流体

Havirg no hysterisis in magnetic characteristic of magnetic fluid, it is possible to decrease the loss. And also it is possible to make heat lower under the high-current excitation. On the other hand, magnetization characteristic of magletic fluid is wide linearity. It will make wave-strain and transient response smmll. Having these interesting characteristics, the inductor using magnetic fluid can be used as a variable inductor for high frequency, which is easily controlled by external magnetic field using permanent magnet. But magnetic fluid has low permeability, so it has no sufficient inductance controlled variable.The purpose of this project is to solve the mensioned problem. We tried to develope new magnetic fluid which has high permeability and internal excita-tion type variable inductor using magnetic fluid. Conbine type magnetic fluid inductor which is conposed by magnetic fluid inductor and C shape ferrite core is also develloped.The magnetic characteristics of two types of inductor were comparatively examined. The results show the fundamental principle and characteristic of these two types of inductor.

磁流体的磁特性无磁滞现象，可以降低损耗。并且还可以在高电流激励下使热更低。另一方面，磁流体的磁化特性是宽线性的。它将使波应变和瞬态响应最小。利用磁流体的电感器具有这些有趣的特性，可以用作高频可变电感器，易于利用永磁体通过外部磁场进行控制。但磁流体的磁导率较低，没有足够的电感控制量，本课题的目的就是解决这一问题。我们试图研制出一种新型的高磁导率磁流体和利用磁流体的内励磁式可变电感器。研制了由磁流体电感器和C形铁氧体磁芯组成的组合式磁流体电感器，并对两种电感器的磁特性进行了比较研究。结果表明，这两种类型的电感器的基本原理和特点。

项目成果

H.Mamiya & I.Nakatani: "Effects of cooling field on magnetic relaxation on an iron-nitride fine particle system" J. Appl. Phys.81・8. 4733-4735 (1997)

H.Mamiya & I.Nakatani：“冷却场对氮化铁细颗粒系统磁弛豫的影响”J. Appl.81・8（1997）。

H. Oka: "Metrology of Magnetization Characteristics of Magnetic Fluid Brought about by an Orthogoral Fluid" 43rd Annual Conference on Magnetism & Magnetic Materials. (1998)

H. Oka：“正交流体带来的磁流体磁化特性的计量”第43届磁学年会

中谷功: "電子線リソグラフィーによるパ-マロイの細線格子及び微粒子の作製とそれらの磁性" 日本金属学会会報(まてりあ). 35. 854- (1996)

Isao Nakatani：“通过电子束光刻法制备坡莫合金细线晶格和细颗粒及其磁性”日本金属研究所通报（材料）35. 854-（1996）。

H.Oka: "Metrology of Magnetization Characteristics of Magnetic Fluid brought about by an Orthogonal Field" 43rd Annual Conference on Magnetism & Magnetic Materials. (1998)

H.Oka：“正交场带来的磁流体磁化特性的计量”第43届磁学年会

中谷 功: "磁性材料の超微細加工とマイクロ磁気特性" マグネティックス研究会資料. 97・3. 9-14 (1997)

中谷功：“磁性材料的超精细加工和微磁特性”磁学研究组材料97・3（1997）。