Thin film core for high frequency power converter of artificial satellite.

人造卫星高频功率变换器薄膜磁芯。

• 批准号: 63460109
• 负责人: SAKAKI Y.
• 金额: $ 4.03万
• 依托单位: Chiba University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (B)
• 财政年份: 1988
• 资助国家: 日本
• 起止时间: 1988 至 1989
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-63460109/
• 关键词: Stacked Thin Film Core; CoZrMo Tape Wound Core; Artificially Stratified CoZrMo+SiO_2 Core; High Frequency Iron Loss Measuring System; Dynamic Domain Observing System; Equivalent Loss Resistance; Equivalent Hysteresis Resistance; Equivalent Eddy Cur

In order to obtain compact powers supplies for artificial satellites, magnetic thin film power cores operating in MHZ band are studied and the following results are obtained.(1)2mum thick CoZrMo thin film cores with high performance are studied using sputtering process and the manufacturing condition is decided. The coercivity of ring core is 4.8A/m and the power loss at 10MHz ,0.1T is one fifth of 5mum thick Supermalloy core.Based on this success tape wound cores were developed and the coercivity is 4A/m. For the purpose of practical high frequency transformers artificially stratified CoZrMo+SiO_2 magnetic cores were studied and the coercivity is 2.8A/m.(2)A high frequency iron loss measuring system operating under square wave voltage is developed for evaluating the high frequency characteristics of thin film cores. The measuring results shows that some materials has less power loss under square wave voltage excitation than in sinusoidal voltage excitation. It is better to apply these materials for switching converters since the converters are usually driven by the square wave voltage source.(3)A dynamic domain observation system using image processing technique is developed. This is useful for studying the mechanism generating eddy current loss in thin film cores.(4)A compact L/C element made of ferrite core only is proposed. This operates multifunctionally and has a possibility realizing compact electronic circuits including magnetic materials. This idea proposes a clue for magnetic integrated circuit.(5)Physical meaning of equivalent core loss resistance is studied. It is the parallel combination of equivalent hysteresis resistance and equivalent eddy current resistance. The former is dependent on the Steinmetz constant and the latter depends strongly upon the magnetic domain configurations.

为了获得紧凑的人造卫星电源，对工作在MHZ频段的磁性薄膜电源磁芯进行了研究，取得了以下成果：(1)采用溅射工艺研究了2μm厚的高性能CoZrMo薄膜磁芯，并确定了制备条件。环形磁芯的矫顽力为4.8A/m，10MHz时的功率损耗为0.1T，是5μm厚Supermalloy磁芯的五分之一。在此基础上成功开发了绕带磁芯，矫顽力为4A/m。以实用化高频变压器为目的，研究了人工分层CoZrMo+SiO_2磁芯，其矫顽力为2.8A/m。(2)开发了方波电压下的高频铁损测量系统，用于评价薄膜磁芯的高频特性。测量结果表明，某些材料在方波电压激励下比在正弦电压激励下具有更少的功率损耗。由于开关变换器通常由方波电压源驱动，因此最好将这些材料应用于开关变换器。(3)开发了一种利用图像处理技术的动态域观测系统。这对于研究薄膜磁芯中涡流损耗的产生机制很有用。(4)提出了一种仅由铁氧体磁芯制成的紧凑型L/C元件。这具有多功能性，并且有可能实现包括磁性材料的紧凑电子电路。这一思想为磁集成电路的研究提供了线索。(5)研究了等效磁芯损耗电阻的物理意义。它是等效磁滞电阻和等效涡流电阻的并联组合。前者取决于斯坦梅茨常数，后者很大程度上取决于磁畴结构。

项目成果

Toshiro,SATO: IEEE Transaction on Magnetics. MAG-24. 2904-2906 (1988)

Toshiro,SATO：IEEE 磁学汇刊。

Y.Saito: "A parameter representing eddy current loss of soft magnetic materials and its constitutve equation" J.Appl.Phys.64. 5684-5686 (1988)

Y.Saito：“代表软磁材料涡流损耗的参数及其本构方程”J.Appl.Phys.64。

奥野光: "CoZrMoスパッタ巻磁心の損失巻" 電気学会マグネテイックス研究会(発表予定). (1990)

Hikaru Okuno：“CoZrMo 溅射缠绕磁芯的损耗绕组”，日本电气工程师学会磁学研究组（待提交）（1990 年）。

佐藤敏郎: "スイッチング電源用多結晶Mn-Znフェライト磁心のMHz帯における電力損発生機構" 電子情報通信学会論文誌. J71-C. 1121-1127 (1988)

Toshiro Sato：“用于开关电源的多晶锰锌铁氧体磁芯的 MHz 频段功率损耗产生机制”，电子、信息和通信工程师协会学报 J71-1127（1988 年）。

T.Sato: "Discussion on eddy current loss under square wave voltage exitation" IEEE Trans.on Magnetics. MAG-26. 2904-2906 (1988)

T.Sato：“方波电压激发下涡流损耗的讨论”IEEE Trans.on Magnetics。