Nd-Fe-B 系磁石 NEOMAX 特性一覧 Neodymium-Iron-Boron Magnets NEOMAX Magnetic Characteristics 低重希土類技術を適用した Fシリーズ NMX-F Series by using low heavy rare-earth tec
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- りえ ふじがわ
- 7 years ago
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1 Permanent Magnets
2 Nd-Fe-B 系磁石 NEOMAX 特性一覧 Neodymium-Iron-Boron Magnets NEOMAX Magnetic Characteristics 低重希土類技術を適用した Fシリーズ NMX-F Series by using low heavy rare-earth technology 1.5 NEOMAX F Series (T) S49F 46F S49FSH S49FH S45F 43F 42F S41F 1.2 High-Performance Grade 37F S38F Heavy Rare-Earth Free H cj H cj 低重希土類技術を適用することで Dy 使用量は従来材より約 1~2% 削減 Low heavy rare-earth NMX-F Series contain about 1~2% lower Dy compared with Standard series. スタンダードシリーズ NEOMAX Standard Series 1.5 S52 NEOMAX Standard Series (T) S50BH S49CH 48BH 46CH 44CH 42BH 40CH 41CH S45SH 43SH 41SH S41EH SH 39EH S38EH 36EH H cj H cj
3 F シリーズ ( フリー系 ) F Series (Heavy Rare-Earth free or reduction) NMX- P P 直角磁界成形 Parpendicular 磁界 Magnetic field プレス方向と磁界方向が直角のもの The magnetic field is parpendicular to the press direction 平行磁界成形 Parallel P 磁界 Magnetic field P プレス方向と磁界方向が平行のもの The magnetic field is parallel to the press direction S49FSH (*) S49FH (*) S49F (*) S45F (*) S41F (*) S38F (*) 46F 43F 42F 37F 42PF 38PF 残留磁束密度 (T) 1.38 ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ 971 H cb 保磁力 13.0 ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~12.2 H cj 最大エネルギー積 Maximum energy product (BH)max (kj/m 3 ) (MGOe) 366 ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ 38 スタンダードシリーズ Standard Series 残留磁束密度 (T) H cb 保磁力 H cj 最大エネルギー積 Maximum energy product (BH)max (kj/m 3 ) (MGOe) NMX- P P 直角磁界成形 Parpendicular 磁界 Magnetic field プレス方向と磁界方向が直角のもの The magnetic field is parpendicular to the press direction 平行磁界成形 Parallel P P 磁界 Magnetic field プレス方向と磁界方向が平行のもの The magnetic field is parallel to the press direction S52 S50BH S49CH S45SH S41EH S38EH 48BH 46CH 44CH 41CH 43SH 41SH 39EH 36EH 44 42BH 40CH 37SH 34EH 1.42 ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ 35 ( 注 ) 実際の特性規格は形状 寸法 製造条件等により変化します Actual magnetic properties may be different from the ones shown above, depending on shape, size and manufacturing conditions. ( * ) この材質は営業担当者へお問い合わせください ( * ) Availabilities of these grades(*) are limited. Please contact your sales representative.
4 重希土類拡散 DDMagic シリーズ Heavy Rare-Earth Diffusion Technology DDMagic 重希土類拡散技術による高性能化 Higher performance by heavy rare-earth diffusion technology (T) Heavy Rare-Earth Diffusion Series - DDMagic E50CH E49SH U48SH U47EH E45EH E41EH 1.2 NEOMAX Standard Series H cj H cj 重希土類拡散材の保磁力分布解析の例 (a)1/4 領域表示 1/4 portion (b) 中央部 Center portion FEM Results of H cj Distribution * (c) 角端部 Edge portion (M) 重希土類元素拡散材には保磁力分布が生じます H cj Distribution is not homogeneous. Low [H cj level indicator] High [ka/m] 重希土類拡散材の特性表 Magnetic Characteristics of Heavy Rare-Earth Diffusion Series-DDMagic 材質名 Material code NMX-E50CH NMX-E49SH NMX-E45EH NMX-E41EH NMX-U48SH NMX-U47EH 残留磁束密度 (T) 1.39~ ~ ~ ~ ~ ~1.42 H cb 保磁力 H cj* 最大エネルギー積 Maximum energy product (BH)max (kj/m 3 ) (MGOe) 374~405 47~51 358~397 45~50 326~366 41~46 294~334 37~42 358~397 45~50 350~390 44~49 は角端部の値を示します * H H cj H cj * 測定位置 cj shows edge portion characteristic. Measurement point of H cj * ( 注 ) 実際の特性規格は形状 寸法 製造条件等により変化します Actual magnetic properties may be different from the ones shown above, depending on shape, size and manufacturing conditions.
5 Nd-Fe-B 系磁石 NEOMAX 減磁曲線 Neodymium-Iron-Boron Magnets NEOMAX Demagnetization Curves 主要材質の減磁曲線 NMX-S シリーズ Demagnetization Curves of NMX-S Series 0.3 ( 室温 ) Permeance Coefficient (Pc=B/μoH) (Room temperature) S41EH S38EH S45SH S49CH S J,B (T) H 主要材質の減磁曲線 NMX-F シリーズ Demagnetization Curves of NMX-F Series S41F Permeance Coefficient (Pc=B/μoH) S49FSH S45F S49FH S49F ( 室温 ) (Room temperature) J,B (T) H
6 NEOMAX 異方性リング磁石 Neodymium-Iron-Boron Magnets NEOMAX Anisotropic Ring Magnets 低重希土類技術を適用することで Dy 使用量は従来材より約 1~2% 削減 Low heavy rare-earth series contain about 1~2% lower Dy compared with standard series. 磁気特性一覧表 ( ラジアル異方性 ) Magnetic Characteristics (Radial Anisotropic) 材質名 Material code NMX-K42R NMX-K40CR NMX-K38SR NMX-K35ER NMX-K40R NMX-K38CR NMX-K35SR NMX-K33ER NMX-K38R NMX-K35CR NMX-K33SR NMX-K30ER 残留磁束密度 (T) 1.28 ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~1.13 H cb 954 ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ 803 ~ ~ ~ ~ ~ ~ 790 ~ 772 ~ ~ ~ ~11.1 保磁力 ( 注 ) 実際の特性規格は形状 寸法 製造条件等により変化します Actual magnetic properties may be different from the ones shown above, depending on shape, size and manufacturing conditions. H cj 最大エネルギー積 Maximum energy product (BH)max (kj/m 3 ) (MGOe) 310~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ 30 磁気特性一覧表 ( 極異方性 ) Magnetic Characteristics (Multi-pole anisotropic) 材質名 Material code 残留磁束密度 保磁力 H cj (T) NMX-K42M NMX-K40CM NMX-K38SM NMX-K35EM * 極異方性磁石は現物でのBH 測定が出来ないため 上表は材料特性を示しています Above numbers show material characteristics because B-H curves of actual multi-pole anisotropic magnets cannot be measured. 推奨内外径と磁石極数 Preferred ID/OD Ratio and Number of Poles 内径 I.D(mm) pole 16pole 12pole 8pole 4pole 外径 O.D(mm)
7 NEOMAX 異方性リング磁石の特徴 Characteristics of Neodymium-Iron-Boron Magnets NEOMAX Anisotropic Ring Magnets ラジアル異方性と極異方性の比較 Comparison Table 配向 Orientation 項目 Items ラジアル異方性 Radial Anisotropic 極異方性 Multi-Pole Anisotropic ラジアル異方性 Radial anisotropic magnet 表面磁束密度波形 Surface magnetic flux density waveform 着磁極数 Number of magnetized poles 台形波 Trapezoidal wave 着磁で変更可 Variable by magnetization 正弦波 Sinusoidal wave 製品固有 Design specific 極中央 Center of polarity 着磁位置 Magnetized position スキュー着磁 Skew magnetization 推奨外径寸法 (mm) Recommended outside diameterm (mm) 着磁で変更可 Variable by magnetization 可 Possible φ15~φ90 固定 Fixed 可 Possible φ8~φ43 極間 Inter-pole 極異方性 Multi-pole anisotropic magnet 推奨内外径比 Recommended inside-to-outside diameter ratio 0.75~ ~0.8 推奨長さ (mm) Recommended length (mm) 5~60 5~40 ( 注 ) 実際の特性規格は形状 寸法 製造条件等により変化します Actual magnetic properties may be different from the ones shown above, depending on shape, size and manufacturing conditions. 詳細については 営業担当者にお問い合わせください Please contact your sales representative. NEOMAX の表面処理 Surface Treatments アルミコーティング Aluminum coating ニッケルメッキ Nickel plating エポキシコーティング Epoxy coating V コート Thin silicate coating M-1 Passivation 標準膜厚 (μm) Standard coating thickness 5 ~ 20 5~25 10 ~ 30 ーー 耐食性 Corrosion resistance 耐湿潤性 Thermal humidity resistance 耐塩水性 Salt spray resistance 接着耐久性 Adhesive endurance 絶縁性 Insulation 寸法精度 Dimensional accuracy 用途 Application Sensors Actuators Various motors VCM Sensors Optical pickup HEV EPS Various motors Compressor motors HEV Mild-corrosion Environmental uses Compressor motors HEV Mild-corrosion Environmental uses 各種表面処理は標準仕様であり 各膜厚は標準値です 用途 使用環境などに応じた特殊仕様については別途ご相談に応じます Please feel free to contact us to determine the surface treatment specification that fits for your application. Excellent Good アルミコーティング Aluminum coating ニッケルメッキ Nickel plating エポキシコーティング Epoxy coating V コート Thin silicate coating M-1 Passivation
8 高性能フェライト磁石 NMF シリーズ High-Performance Ferrite Magnets NMF F Series 量産フェライト磁石として世界最高レベルの磁気特性を実現 (2018 年 3 月時点 ) The highest level magnetic properties available in a mass-produced ferrite magnets.(as of Mar. 2018) 520 (mt) C 6D 9D 12E 6E 12F 9E 6F 15G 12G+ 12G 9F 6G 9G 12J 15J 12K H cj H cj 磁気特性一覧表 Magnetic Characteristics 材質名 Material code NMF-15G NMF-15J NMF-12E NMF-12F NMF-12G+ NMF-12G NMF-12J NMF-12K NMF-9D NMF-9E NMF-9F NMF-9G NMF-6C NMF-6D NMF-6E NMF-6F NMF-6G 残留磁束密度 (mt) 470 ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ 400 保磁力 最大エネルギー積 Maximum energy product H cb H cj (BH)max 342 ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ (kj/m 3 ) 41.4 ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ 3 (MGOe) 5.2 ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ 3.8 ( 注 ) 上表は材料特性を示しています Above table shows material characteristics. 実際の特性規格は形状 寸法 製造条件等により変化します Actual magnetic properties may be different from the ones shown above, depending on shape, size and manufacturing conditions. 上記以外のグレードについては 営業担当者へお問い合わせください Please contact your sales representative about other grades.
9 高性能フェライト磁石 NMF シリーズ減磁曲線 High-Performance Ferrite Magnets NMF Series Demagnetization Curves 主要材質の減磁曲線 NMF-12 シリーズ Demagnetization Curves of NMF-12 Series ( 室温 ) Permeance Coefficient (Pc=B/μoH) (Room temperature) K 12J 12G 12F 12E J,B (T) H 主要材質の減磁曲線 NMF-15 シリーズ Demagnetization Curves of NMF-15 Series ( 室温 ) Permeance Coefficient (Pc=B/μoH) (Room temperature) J 15G J,B (T) H
10 高性能フェライト磁石 NMF シリーズ High-Performance Ferrite Magnets NMF F Series 保磁力 (H cj) の温度係数 Temperature Coefficient of H cj NMF-6 series 低温減磁耐力 Demagnetization resistance at low temperature ΔH cj / H cj (%/K) NMF-9 series NMF-12 series NMF-15 series 強 Higher H cj 15 材による設計検討結果 ( パワーシート用モータの場合 ) Design Comparison between Nd-Fe-B Bonded and NMF-15G (Power Seat Motor) Nd ボンド磁石と比較し モータ重量低減が可能 Reduce motor weight by using ferrite 15 material. φ38 φ38 4 極ブラシ付モータ 4pole brush motor モータ外径 :φ38( 固定 ) 設計条件 : 同一モータ特性 ( 回転数 トルク 減磁耐力等 ) Motor OD:φ38 (fixed) Design condition: Same motor performance (rpm, torque, demagnetization resistance etc) Nd-Fe-B Bonded ( 社内設計による /by our own design) 2.5 NMF-15G (g/motor) Nd-Fe-B Bonded NMF-15G 重量比較 (g/motor) Weight comparison コイル Coil シャフト Shaft ヨーク Yoke アーマチュア Armature Weight(g) Coil Shaft Yoke Armature Magnet マグネット Magnet 合計 Total (4pcs) Nd-Fe-B Bonded 22.0 NMF-15G
11 フェライト異方性リング磁石 Ferrite Anisotropic Ring Magnets フェライト極異方性リング磁石 Ferrite Anisotropic Multi-Pole Ring Magnets タイプ Types 材質 Material 乾式製法 Dry-pressing NMF-DM1 NMF-DM2 NMF-DM3 湿式製法 Wet-pressing NMF-WM2 NMF-WM3 NMF-WM4 磁石外径 OD(mm) φ10 ~φ56 φ10 ~φ30 極数 Number of Poles 配向 Orientation N S 極数等に関する仕様については営業担当者へお問い合わせください On characteristics not listed on above table, please contact your sales representative. 推奨内外径と磁石極数 Preferred ID/OD Ratio and Number of Poles 内径 I.D(mm) pole 12pole 10pole 10 8pole 5 6pole 2pole 外径 O.D(mm) 磁気特性一覧表 Magnetic Characteristics 材質名 Material code 残留磁束密度 (mt) 保磁力 H cj NMF-DM1 NMF-DM2 NMF-DM3 NMF-WM1 NMF-WM2 NMF-WM3 NMF-WM * 極異方性磁石は現物でのBH 測定が出来ないため 上記は材料特性を示しています Above numbers show material characteristics because B-H curves of actual multi-pole anisotropic magnets cannot be measured.
12 Nd-Fe-B 系ボンド磁石 HIDENSE, NEOMAX-P シリーズ Neodymium-Iron-Boron Bonded Magnets HIDENSE, NEOMAX-P Series 異方性ボンド磁石の磁気特性に匹敵する 超高密度の等方性ボンド磁石 HIDENSE is Ultrahigh Density Isotropic Bonded Magnets with equivalent magnetic properties to Anisotropic Bonded Magnets. 形状自由度が高い High flexibility for shape. 着磁自由度が高い High flexibility for magnetized patterns. Nd 焼結磁石比で高い電気抵抗率 High Electric resistivility than Nd-sintered magnets. 重希土類フリー Heavy rare-earth free. (T) HIDENSE P11 P9 0.6 P6 P8H NEOMAX-P ,000 1,200 H cj 磁気特性一覧表 Magnetic Characteristics 材質 Material code 残留磁束密度 mt 保磁力 H cj 保磁力 H cb 最大エネルギー積 Maximum energy product ka/m koe ka/m koe kj/m 3 MGOe HIDENSE ~ ~ 13.5 HIDENSE ~ ~ 13.5 HIDENSE ~ ~ 13.6 HIDENSE ~ ~ 12.2 NEOMAX-P ~ ~ 11 NEOMAX-P ~ 80 8 ~ 10 NEOMAX-P8H ~ 72 7 ~ 9 NEOMAX-P ~ 56 5 ~ 7 ( 注 ) 実際の特性規格は形状 寸法 製造条件等により変化します Actual magnetic properties may be different from the ones shown above, depending on shape, size and manufacturing conditions.
13 HIDENSE 減磁曲線 HIDENSE Demagnetization Curves Energy Product (kj/m 3 ) HIDENSE-500 HIDENSE-600 HIDENSE-700 HIDENSE ,500-1, H B, J(T) 物性値 Material Properties 材質 Material code 温度係数 Temperature coefficient (%/ ) H cj リコイル透磁率 Recoil permrability μ rec 線膨張係数 Thermal expansion ( 10-6 / ) 電気抵抗 Electrical resistivity (μω cm) 圧環強度 Ring crushing strength (Mpa) 密度 Density ( 10 3 g/m -3 ) HIDENSE HIDENSE + 樹脂含浸 HIDENSE+Resin impregnated , ~6.5 NEOMAX-P NEOMAX-P+ 樹脂含浸 NEOMAX-P+Resin impregnated , ~6.0 表面処理 Surface Treatments 表面処理の種類 Surface treatments 推奨膜厚 Recommended thickness 接着性 Adhesive property 耐食性 Corrosion resistance エポキシ吹付コーティング 10~30 μm Epoxy spray coating エポキシ電着コーティング 10~30 μm Epoxy electrodeposition coating ニッケルメッキ 5~20 μm Nickel plating 樹脂含浸 ( 封孔処理 ) 5~20 μm Resin impregtaned(pore sealing) 簡易防錆コーティング 1~10 μm Simple corrosion inhibitor coating 接着性は ご使用になる接着剤によって異なります 耐食性は 当社試験によるもので 使用環境や試験条件によって異なります *Adhesive property is depending on yours. *Corrosion resistance is depending on your environments, and on your test conditions. エポキシ吹付コーティング Epoxy spray coating エポキシ電着コーティング Epoxy electrodeposition coating ニッケルメッキ Nickel plating 樹脂含浸 Resin impregtaned
14 鋳造磁石 ( CKSC )/ 圧延磁石 ( CKSR ) Cast Magnets(CKSC )/ Rolled Magnets(CKSR ) 残留磁束密度が高く 温度安定性に優れ リサイクルが容易な省資源型磁石 Cast and Rolled magnet have high remanence and excellent temperature stability, and are resource-saving material as they can be recycled easily. Fe-Cr-Co 磁石の特長 Characteristics of Fe-Cr-Co Magnet <CKSC/CKSR> アルニコ磁石の特徴を有しながら 残留磁束密度が高く Co 含有量が少ない High remanence with low cobalt content, while maintaining characteristics of Alnico magnet 残留磁束密度の温度係数が小さい (-0.03%/K) Small temperature coefficient of remanence (-0.03%/K) 原料にレアアースを使用しておらず 調達安定性に優れる Stable supply of raw materials because no rare earth elements are used <CKSR> 形状自由度が高い High capability of forming パーミアンス係数ー Pc(Permeance coefficient)(b/μoh) CKSC アルニコ5 相当材 CKSR H B (T) 磁気特性一覧表 Magnetic Characteristics 1. 鋳造 Fe-Cr-Co 磁石 Fe-Cr-Co magnets (casting) 材質名 Material code CKSC-550B CKSC-600 残留磁束密度 : T 1.35~ ~1.40 保磁力 : Hc ka/m 42 ~ ( 0.53 ~ 0.63 ) ~ ( 0.58 ~ 0.66 ) 53 最大エネルギー積 : ( BH )max Maximum energy product kj/m 3 (MGOe) 42.1 ~ 5 ( 5.3 ~ 6.3 ) 43.7 ~ 51.8 ( 5.5 ~ 6.5 ) の温度係数 Temperature coefficient of (%/K) 特長 Features 異方性 Anisotropy 2. 圧延 Fe-Cr-Co 磁石 Fe-Cr-Co magnets (rolling) 材質名 Material code CKSR-150 残留磁束密度 : T 0.80 ~ 0.90 保磁力 : Hc ka/m 31 ~ 39 ( 0.40 ~ 0.48 ) 最大エネルギー積 : ( BH )max Maximum energy product kj/m 3 (MGOe) 8.7 ~ 15.2 ( 1.1 ~ 1.9 ) の温度係数 Temperature coefficient of (%/K) 特長 Features 等方性 Isotropy CKSR-550 CKSR-400H 1.30 ~ ~ ~ 54 ( 0.53 ~ 0.67 ) 55 ~ 67 ( 0.70 ~ 0.83 ) 42.1 ~ 54.2 ( 5.3 ~ 6.8 ) 22.2 ~ 30.3 ( 2.8 ~ 3.8 ) 異方性 Anisotropy CKSR-H5B~H30B 1.20 ~ ~ 24 ( 0.05 ~ 0.30 ) - - 異方性半硬質 Anisotropy,Semi-hard CKSR-HOSL 1.00 ~ ~ 4 ( 0.01 ~ 0.05 ) - - 異方性半硬質 Anisotropy,Semi-hard ( 注 ) 実際の特性規格は形状, 寸法, 製造条件, 使用環境等により変化します Actual magnetic properties may be different from the ones shown above depending on shape, size, manufacturing conditions or operating conditions.
15 永久磁石の特性変化 ( 減磁 ) について For characteristic change (Demagnetization) of the Permanent Magnets 減磁の種類 Types of Demagnetization 現象可逆変化不可逆変化 (A) 不可逆変化 (B) 現象の説明環境が変化すれば磁束量は変化する環境が元に戻れば復元する環境が戻っても元の値に復元しない再着磁すればまた元の値に回復する環境が戻っても元の値に復元しない再着磁しても 元の値に回復しない 原 因 材料固有の磁気的性質の温度変化 外部磁界による減磁低温減磁高温減磁腐食 溶解 酸化などによる組織 組成変化 Phenomenon Reversible Loss Irreversible Loss(A) Explanation A reversible loss is a change (decrease) in magnetic flux that takes place according to a change in environment (such as temperature) and that recovers to its original value without any net loss when the environment returns to the original state. An irreversible loss of this type is a net loss that does not recover even when the environment returns to the original state but it is recoverable by re-magnetization. Cause Temperature Coefficient Low and high temperature demagnetization due to age-related change or an external magnetic field Irreversible Loss(B) An irreversible loss of this type is a net loss that does not recover when the environment returns to the original state nor when the magnet is re-magnetized. Changes in structure and/or composition due to corrosion and/or heat 外部磁界による減磁 Demagnetization by External Magnetic Field 外部磁界の影響を検討する場合は 磁石固有の磁化の強さを示す JH カーブを用 います 磁石使用時のパーミアンス係数が Pc の場合 BH カーブとの交点 P の磁 束密度 Bp で磁石は動作します P 点からの垂線と JH カーブとの交点を Q とします Q 点は 外部磁界が 0( ゼロ ) 時 の磁化の強さを表し Pc (=Pc+1) と JH カーブとの交点と一致します 外部磁界 Hex が逆方向に印加された場合 パーミアンス係数が外部磁界だけ平 行移動 Pc したと考えられます したがって Q 点は Pc と JH カーブの交点 R に 移動します 次に 外部磁界を取り除いた場合 R 点は JH カーブに対して平行移動 し Pc との交点 Q になります Q 点から下ろした垂線と Pc との交点 P が 外部磁 界を受けた後の磁石動作点での磁束密度 Bp になります つまり BH カーブと Pc との交点 P には戻らず (Bp-Bp ) だけ磁束密度が低下します これを 不可 逆変化 ( 外部磁界による減磁 ) といい R 点が JH カーブの屈曲部よりも下になる 場合に起こります 屈曲部 Knee point JHカーブ JH Curve Pc R Pc (=Pc+1) Q Q Pc P P BHカーブ BH Curve J,B(T) Bp Bp (Bp ー Bp ) 外部磁界による減磁 Demagnetization Due to External Magnetic Field In order to examine the effects of an external magnetic field on demagnetization characteristics of a magnet, JH curve that describes the relation between the internal magnetization of the magnet and the external magnetic field is used. When the permeance coefficient (-B/µ0H) of a given magnetic circuit is Pc, the permanent magnet operates with the magnetic flux density Bp at the intersection P of the load line with the BH curve. If an intersection between a vertical line from the point P and the JH curve is defined as Q, the point Q represents the intensity of magnetization of the magnet when an external magnetic field is zero. It may be noted that the slope of the line OQ is Pc (Pc =Pc+1). When the external magnetic field Hex is applied in the opposite direction to the magnetization, the line OQ is shifted toward negative direction without changing the slope Pc by the external magnetic field. If the point Q moves to the intersection R on the JH curve beyond the knee point, an irreversible demagnetization occurs. Namely, after the external HcJ HcB Hex -H 外部磁界 External Magnetic Field magnetic field is removed, the point R moves on a recoil curve RQ to the intersection point Q with OQ. The magnetic flux density in the magnet corresponding to the magnetization at point Q can be obtained by determining the new operating point P, which is the intersection point between a vertical line drawn from the point Q and the load line OP. In other words, the magnetic flux density does not return to the intersection P between the BH curve and Pc but it decreases by (Bp-Bp ). 0 高温減磁の図式解説 Demagnetization by High Temperature 磁束密度 () の温度係数 α=-0.11 % /Kの希土類磁石の20 および140 の減磁曲線をそれぞれABで表します < 磁石使用時のパーミアンス係数がP1の場合 > 20 では減磁曲線 AとP1との交点 aの磁束密度 Baで磁石は動作します また 140 では減磁曲線 BとP1との交点 bの磁束密度 Bbで磁石は動作します このとき磁石の温度係数 αは (-0.11%/K) ですので Bbは Bb=Ba{ } で求められます 温度変化分 (Δt) さらに温度を20 に戻すと 減磁曲線 AとP1との交点 aに戻り磁束密度 Baで動作します 温度が元に戻れば特性も復元します これを 可逆変化 といいます < 磁石使用時のパーミアンス係数がP2の場合 > 20 では減磁曲線 AとP2との交点 cの磁束密度 Bcで磁石は動作します また 140 では減磁曲線 BとP2との交点 dの磁束密度 Bdで磁石は動作します さらに温度を20 に戻すと 磁束密度は磁石の温度係数分のみ戻り Beで動作します つまり 減磁曲線 AとP2との交点 cには戻らず ( Bc-Be) だけ磁束密度が低下します このように 高温時において磁石動作点が減磁曲線の屈曲部を越え 屈曲部よ り下で交差し 環境を戻しても元の磁束密度が得られないことを 不可逆変化 ( 高温減磁 ) といいます B(T) 温度係数 ( ー 0.11%/K) 20 Temp.coeff, of 屈曲部 A Knee point P B a Ba ( ー 0.11%/K) P 2 b Bb Bc c 0.6 ( ー 0.11%/K) 0.6 Be Bd d 高温減磁 (Bc-Be) High Temperature Demagnetization H 温度 ( ) Temperature ( )
16 永久磁石の特性変化 ( 減磁 ) について For characteristic change (Demagnetization) of the Permanent Magnets The demagnetizing curves of the Rare Earth magnet with the magnetic flux density () temperature coefficient α=-0.11%/k at temperatures of 20 and 140 are represented by A and B, respectively. <A case free from thermal demagnetization: when the permeance coefficient is P1 while the magnet is in use> At 20, the magnet operates with the magnetic flux density Ba at the intersection a between the demagnetizing curve A and the load line with the permeance coefficient P1. At 140, the magnet operates with the magnetic flux density Bb at the intersection b between the demagnetizing curve B and the same load line. In this case, since the temperature coefficient of, α, of the magnet is -0.11%/K, Bb can be determined by the following formula: Bb = Ba { x 120} the temperature change ( t) When the temperature returns to 20, the magnet returns to the intersection a between the BH demagnetizing curve A and the load line (with a slope P1) and operates with the magnetic flux density Ba. When the temperature returns to its initial level, the characteristics are restored. This phenomenon is referred to as reversible change. <A case in which thermal demagnetization occurs: when the permeance coefficient is P2 (P2<P1 ) while the magnet is in use> At 20, the magnet operates with the magnetic flux density Bc at the intersection c between the BH demagnetizing curve A and a load line with a smaller permeance coefficient P2 compared with P1. At 140, the magnet operates with the magnetic flux density Bd at the intersection d between the BH curve B and the load line beyond the knee point. When the temperature returns to 20, the magnetic flux density does not return to the original value but to Be from Bd by only an amount corresponding to the magnet s reversible temperature coefficient of the magnetic flux density. In other words, an irreversible loss by (Bc-Be) occurs. This phenomenon is referred to as irreversible change (or, Thermal Demagnetization at High Temperature, or simply, High Temperature Demagnetization." 低温減磁の図式解説 Demagnetization by Low Temperature 磁束密度 () の温度係数 α=-0.18 % /Kのフェライト磁石の20 および -60 の減磁曲線をそれぞれABで表します < 磁石使用時のパーミアンス係数がP1の場合 > 20 では減磁曲線 AとP1との交点 aの磁束密度 Baで磁石は動作します また -60 では減磁曲線 BとP1との交点 bの磁束密度 Bbで磁石は動作します このとき磁石の温度係数 αは ( ー 0.18%/K) ですので Bbは Bb=Ba{1 ー ( ー 80)} で求められます 温度変化分 (Δt) さらに温度を20 に戻すと 減磁曲線 AとP1との交点 aに戻り磁束密度 Baで動作します 温度が元に戻れば特性も復元します これを 可逆変化 といいます < 磁石使用時のパーミアンス係数がP2の場合 > 20 では減磁曲線 AとP2との交点 cの磁束密度 Bcで磁石は動作します また -60 では減磁曲線 BとP2との交点 dの磁束密度 Bdで磁石は動作します さらに温度を20 に戻すと 磁束密度は磁石の温度係数分のみ戻り Beで動作します つまり 減磁曲線 AとP2との交点 cには戻らず (Bc-Be) だけ磁束密度が低下します このように 低温時において磁石動作点が減磁曲線の屈曲部を越え 屈曲部より下で交差し 環境を戻しても元の磁束密度が得られないことを 不可逆変化 ( 低温減磁 ) といいます 屈曲部 Knee point P 2 A c d e P 1 b B a Bb Bd H 温度 ( ) Temperature ( ) P 1 Ba B(T) 0.5 温度係数 ( ー 0.18%/K) Temp.coeff, of ( ー 0.18%/K) ( ー 0.18%/K) P Bc Be (Bc-Be) 低温減磁 Low Temperature 0.1 Demagnetization The demagnetizing curves of the Ferrite magnet with the magnetic flux density () temperature coefficient α=-0.18%/k at temperatures of 20 and -60 are represented by A and B, respectively. <A case free from thermal demagnetization: when the permeance coefficient is P1 while the magnet is in use> At 20, the magnet operates with the magnetic flux density Ba at the intersection a between the demagnetizing curve A and the load line with the permeance coefficient P1. At -60, the magnet operates with the magnetic flux density Bb at the intersection b between the demagnetizing curve B and the same load line. In this case, since the temperature coefficient of, α, of the magnet is -0.18%/K, Bb can be determined by the following formula: Bb = Ba { x (-80)} the temperature change ( t) When the temperature returns to 20, the magnet returns to the intersection a between the BH demagnetizing curve A and the load line (with a slope P1) and operates with the magnetic flux density Ba. When the temperature returns to its initial level, the characteristics are restored. This phenomenon is referred to as reversible change. <A case in which thermal demagnetization occurs: when the permeance coefficient is P2 (P2<P1 ) while the magnet is in use> At 20, the magnet operates with the magnetic flux density Bc at the intersection c between the BH demagnetizing curve A and a load line with a smaller permeance coefficient P2 compared with P1. At -60, the magnet operates with the magnetic flux density Bd at the intersection d between the BH curve B and the load line beyond the knee point. When the temperature returns to 20, the magnetic flux density does not return to the original value but to Be from Bd by only an amount corresponding to the magnet s reversible temperature coefficient of the magnetic flux density. In other words, an irreversible loss by (Bc-Be) occurs. This phenomenon is referred to as irreversible change (or, Thermal Demagnetization at Low Temperature, or simply, Low Temperature Demagnetization.)"
17 Hitachi Metals Magnetic Materials Company Worldwide Locations China Hitachi Metals San Huan Magnetic Material (Nantong) Co.,Ltd Korea Pacific Metals Co., Ltd. Japan U.S.A. Hitachi Metals North Carolina, Ltd. China Dongguan Sumitok-Super Electronics Co., Ltd. Philippines San Technology, Inc. Indonesia PT. Hitachi Metals Indonesia Rare Earth Magnets Ferrite Magnets Magnet Assemblies Cast Magnets 日本 Japan 磁性材料研究所 ( 埼玉 ) Saitama Magnetic Materials Research Laboratory 株式会社 NEOMAX 近畿 ( 兵庫 ) Hyogo NEOMAX KINKI Co., Ltd. 株式会社 NEOMAX 九州 ( 佐賀 ) Saga NEOMAX KYUSHU Co., Ltd. 熊谷磁材工場 ( 埼玉 ) Saitama Kumagaya Works 本社 ( 東京 ) Tokyo Headquarters 佐賀工場 ( 佐賀 ) Saga Saga Works NEOMAXエンジニアリング株式会社 ( 群馬 大阪 兵庫 ) Gunma, Osaka, Hyogo NEOMAX ENGINEERING Co., Ltd.
18 磁性材料カンパニー Magnetic Materials Company 本社 東京都港区港南一丁目 2 番 70 号 ( 品川シーズンテラス ) TEL FAX Headquarters Shinagawa Season Terrace, 2-70, Konan 1-chome, Minato-ku, Tokyo TEL FAX 国内販売拠点 Domestic Sales Offices 営業部 東京都港区港南一丁目 2 番 70 号 ( 品川シーズンテラス ) TEL FAX 中日本支社 愛知県名古屋市中区錦 瀧定ビル TEL FAX Sales Office Shinagawa Season Terrace, 2-70, Konan 1-chome, Minato-ku, Tokyo TEL FAX Central Japan Regional Office Takisada Building, 13-19, Nishiki 2-chome, Naka-ku, Nagoya, Aichi TEL FAX 西日本支社 大阪府大阪市北区中之島三丁目 3 番 23 号 ( 中之島ダイビル ) TEL FAX Western Japan Regional Office Nakanoshima Dai Building, 3-23 Nakanoshima 3-chome, kita-ku Osaka TEL FAX 九州支店 福岡県福岡市中央区天神 天神三井ビル TEL FAX Kyushu Sales Office Tenjin Mitsui Building, 14-13, Tenjin 2-chome, Chuo-ku, Fukuoka TEL FAX 海外販売拠点 Overseas Sales Offices Hitachi Metals America, Ltd. Chicago Office 85 West Algonquin Road, Suite 400, Arlington Heights, IL 60005, U.S.A. TEL FAX Hitachi Metals Europe GmbH South Germany Office, Leonberg Roemerstrasse 75, Leonberg, Germany TEL [email protected] Hitachi Metals Singapore Pte. Ltd. 12 Gul Avenue, Singapore TEL FAX Hitachi Metals(China), Ltd. 11F, Chong Hing Finance Center, No.288, Nanjing Road (West), Shanghai, China (200003) TEL FAX Hitachi Metals Hong Kong Ltd. 8/F, Building 20E, Phase 3, Hong Kong Science Park, Pak Shek Kok, New Territories, Hong Kong TEL FAX Hitachi Metals (Thailand) Ltd. Bangkok Sales Office 898 Unit13A1, 13FL., Ploenchit Tower. Ploenchit Rd.,Lumpini, Pathumwan, Bangkok Thailand TEL FAX Hitachi Metals (India) Private Limited Plot No 94 & 95, Sector 8, IMT Manesar, Gurgaon , Haryana, India TEL FAX 安全に関するご注意 : 本カタログ記載の製品をご使用の際は 必ず取扱説明書などをご覧ください For details on each product please refer to the product catalog that describes the relevant product or directly contact the section in charge. 記載の内容は予告なく変更する場合がございます 記載内容の無断転載を禁じます 詳細につきましては担当部署へお問い合わせください 上記連絡先は変更になる場合もありますので 電話がつながらない場合は お手数ですが下記までご連絡をお願いいたします 日立金属株式会社 Tel. (03) The above contact numbers are subject to change. If you cannot reach us using those numbers, please try the following: Hitachi Metals, Ltd. Toll-free (in Japan), Tel All rights reserved. カタログ番号 HG-A27-H 2018 年 3 月作成 (T-HT3)
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