JPH062630U - Bipolar magnetizer - Google Patents
Bipolar magnetizerInfo
- Publication number
- JPH062630U JPH062630U JP4603092U JP4603092U JPH062630U JP H062630 U JPH062630 U JP H062630U JP 4603092 U JP4603092 U JP 4603092U JP 4603092 U JP4603092 U JP 4603092U JP H062630 U JPH062630 U JP H062630U
- Authority
- JP
- Japan
- Prior art keywords
- pole
- magnet
- magnetizer
- magnetized
- distribution
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- Permanent Field Magnets Of Synchronous Machinery (AREA)
Abstract
(57)【要約】
【目的】 飽和状態にまで電圧を高くして着磁しても、
磁石表面の極内Ｂｇ分布をできるだけフラットにするこ
とが可能な二極着磁器の提供。
【構成】 各ポールピース１１，１２には、ボイスコイ
ルモーターのフラットコイルが、所定の振れ角０°の位
置で相対する永久磁石の位置で、相対するフラットコイ
ルの形状に沿い当該フラットコイル幅相当の幅を有する
外周部からの切欠部１３，１４を設けてある。
【効果】 着磁後の磁石表面の極内Ｂｇ分布にピークが
発生せずに平坦化された分布となり、飽和状態にまで電
圧を高くしても、最適磁場状態で磁石を着磁することが
可能になる。
(57) [Summary] [Purpose] Even when magnetized by increasing the voltage to a saturated state,
Provided is a two-pole magnetizer capable of making the Bg distribution in the pole on the magnet surface as flat as possible. [Structure] A flat coil of a voice coil motor is arranged on each of the pole pieces 11 and 12 at a position of a permanent magnet facing each other at a position where a predetermined deflection angle is 0 °, and a flat coil width corresponding to the flat coil corresponding to the shape of the facing flat coil. Notches 13 and 14 from the outer peripheral portion having the width of are provided. [Effect] The Bg distribution in the poles on the magnet surface after magnetization has a flattened distribution with no peaks, and even if the voltage is increased to the saturation state, the magnet can be magnetized in the optimum magnetic field state. It will be possible.
Description
【０００１】[0001]
この考案は、永久磁石用の二極着磁器、特に、フラットコイル型のボイスコイ ルモーター用永久磁石の二極着磁器の改良に係り、ボイスコイルモーターの所要 振れ角範囲の発生トルク分布をフラットにするため、ポールピースの被着磁磁石 との対向面に所要の切欠部を設けた二極着磁器に関する。 The present invention relates to an improvement in a two-pole magnetizer for permanent magnets, particularly a two-pole magnetizer for a flat coil type permanent magnet for a voice coil motor, which flattens the generated torque distribution in the required deflection angle range of the voice coil motor. Therefore, the present invention relates to a two-pole magnetizer in which a required notch is provided on the surface of the pole piece facing the magnetized magnet.
【０００２】[0002]
多極着磁器には、種々の構成が提案されているが、放電電流を利用した着磁器 は、基本的には板状ヨークに所要極数のポールピースを配設して、各ポールピー スに巻線を施した構成からなる。 例えば、図３に示すフラットコイル型ボイスコイルモーターには、箱型ヨーク １内に２枚の永久磁石２，３が対向配置され、その空隙内にフラットコイル４が 揺動可能に配置される構成であり、前記２枚の永久磁石２，３はそれぞれ二極着 磁してある。 Various configurations have been proposed for multi-pole magnetizers.However, magnetizers that utilize discharge current basically use pole pieces of the required number of poles on a plate-like yoke, and It consists of a coil. For example, in the flat coil type voice coil motor shown in FIG. 3, two permanent magnets 2 and 3 are arranged in a box-shaped yoke 1 so as to face each other, and a flat coil 4 is swingably arranged in the space. The two permanent magnets 2 and 3 are each magnetized with two poles.
【０００３】 上記ボイスコイルモーターにおいて、所要振れ角範囲の発生トルクのレベルを ある範囲にするため、着磁器に流す放電電圧を調整して着磁を行うと、所謂トル クリニアリティが悪化する問題があった。 すなわち、二極着磁器に流す放電電圧を最大限にして着磁した時の磁石表面の それぞれの極内（例えば、Ｎ極またはＳ極）におけるＢｇ分布（以下、極内Ｂｇ 分布という）は、比較的平坦化されるが、ピーク値が要求される値を越える場合 に、放電電圧を下げて着磁を行うと、着磁プロフィールが異なり、磁石表面の極 内Ｂｇ分布が平坦部の狭い分布となり、トルクリニアリティが悪化する。In the above voice coil motor, if the discharge voltage applied to the magnetizer is adjusted to magnetize in order to set the level of the generated torque in the required deflection angle range to a certain range, so-called torque linearity deteriorates. there were. That is, the Bg distribution (hereinafter referred to as the in-pole Bg distribution) in each pole (for example, N pole or S pole) of the magnet surface when magnetized by maximizing the discharge voltage applied to the bipolar magnetizer is Although it is relatively flattened, if the discharge voltage is lowered and magnetization is performed when the peak value exceeds the required value, the magnetization profile will be different, and the Bg distribution within the pole of the magnet surface will be a narrow distribution in the flat portion. And the torque linearity deteriorates.
【０００４】 そこで、出願人は、図２に示す如く各ポールピース１１，１２の被着磁磁石と の対向面に、適当な凹部１６，１７を設けることにより、トルクレベルを下げる ように着磁電圧を下げて着磁しても、磁石表面の極内Ｂｇ分布が平坦化された分 布となり、トルクリニアリティが劣化しないことを知見し、各ポールピースの被 着磁磁石との対向面に凹部を設けた二極着磁器を提案（特開平４−２３４１４号 公報）した。Therefore, the applicant has magnetized so as to lower the torque level by providing appropriate recesses 16 and 17 on the surfaces of the pole pieces 11 and 12 facing the magnetized magnets as shown in FIG. It was found that even if the voltage was reduced and magnetized, the distribution of Bg in the poles on the magnet surface was flattened, and torque linearity did not deteriorate, and the recesses were formed on the surface of each pole piece facing the magnetized magnet. A two-pole magnetizer provided with is proposed (JP-A-4-23414).
【０００５】[0005]
上記の凹部を設けた二極着磁器では、飽和状態にまで電圧を高くし、着磁する と前記凹部溝の効果が薄くなっていき、トルクリニアリティはあまり改善されな い問題があった。 In the bipolar magnetizer provided with the above-mentioned recess, when the voltage is increased to a saturated state and magnetized, the effect of the recess groove becomes thin, and there is a problem that torque linearity is not improved so much.
【０００６】 この考案は、放電電流を利用した二極着磁器の上述の問題点に鑑み、飽和状態 にまで電圧を高くして着磁しても、磁石表面の極内Ｂｇ分布をできるだけフラッ トにすることが可能な二極着磁器の提供を目的としている。In view of the above-mentioned problems of the two-pole magnetizer using the discharge current, the present invention flattenes the in-pole Bg distribution on the magnet surface as much as possible even if the magnet is magnetized by increasing the voltage to the saturated state. It is an object of the present invention to provide a bipolar magnetizer that can be used.
【０００７】[0007]
この考案は、ヨークに複数のポールピースを配設して各ポールピースに巻線を 施し、コンデンサー電源からの放電電流により発生した磁界にて着磁する二極着 磁器において、各ポールピースに被着磁磁石の所要面に対向する外周面からの切 欠部を設け、切欠部を含む外周面に沿って巻線を施したことを特徴とする二極着 磁器である。 This invention is a two-pole magnetizer in which a plurality of pole pieces are arranged in a yoke, each pole piece is wound, and a magnetic field generated by a discharge current from a capacitor power supply magnetizes the pole pieces. The two-pole magnetizer is characterized in that a notch is provided from the outer peripheral surface facing the required surface of the magnetized magnet, and a winding is provided along the outer peripheral surface including the notch.
【０００８】 この考案において、各ポールピースに設ける切欠部は、被着磁磁石の形状等に 応じて形状等が決定されたポールピースに適宜配設されるが、例えば切欠部が被 着磁磁石の中央部まで対向するように所要外周部から中央部まで切り欠くように 設けることができ、着磁後の磁石表面の極内Ｂｇ分布の最大値を減少させ得る位 置に、減少量等に応じて適当な形状の切欠部とすれば、実施例の如き構成のほか 、複数の切欠部を所要配置することができる。In this invention, the notch provided in each pole piece is appropriately arranged in the pole piece whose shape and the like are determined according to the shape of the magnetized magnet. For example, the notch is the magnetized magnet. It can be provided so as to face to the central part of the magnet from the required outer peripheral part to the central part so that the maximum value of the in-pole Bg distribution on the magnet surface after magnetization can be decreased and the amount of decrease can be reduced. According to the cutout portion having an appropriate shape, a plurality of cutout portions can be arranged as required in addition to the configuration of the embodiment.
【０００９】 また、この考案において、ポールピースあるいはさらにヨークを構成する材料 には、低炭素鋼等の公知のいずれの磁性材料が採用でき、さらに、Ｍｎ−Ｚｎフ ェライト粉、Ｎｉ−Ｚｎフェライト粉、センダスト粉、ダストコア用純鉄粉など 、高透磁率で飽和磁化が大きくかつ固有抵抗の大きな軟磁性粉末を、エポキシ樹 脂、シリコンなどの電気絶縁性材料と複合して成型した電気抵抗の大きい材料に て構成することにより、少電流で強磁界を発生し所要の着磁が可能になり、パル ス磁界が作用したとき渦電流の発生を低減でき、より好ましい効果が得られる。Further, in the present invention, any known magnetic material such as low carbon steel can be adopted as the material forming the pole piece or the yoke, and further, Mn-Zn ferrite powder and Ni-Zn ferrite powder can be used. , Sendust powder, pure iron powder for dust core, etc., and soft magnetic powder with high magnetic permeability, large saturation magnetization and large specific resistance, combined with an electrically insulating material such as epoxy resin or silicon, and molded to have high electrical resistance By using a material, a strong magnetic field can be generated with a small amount of current to achieve the required magnetization, and the generation of eddy currents can be reduced when a pulsed magnetic field acts, and a more preferable effect can be obtained.
【００１０】[0010]
考案者らは、二極着磁器に流す放電電圧を飽和状態に調整して着磁しても、ト ルクリニアリティが悪化しない構成の二極着磁器を目的に種々検討した結果、各 ポールピースの被着磁磁石との所要対向面に、適当な切欠部を設けることにより 、磁石表面の極内Ｂｇ分布にピークが発生せずに平坦化された分布となり、トル クリニアリティが劣化しないことを知見し、この考案を完成した。 As a result of various studies aimed at a two-pole magnetizer having a configuration in which torque linearity does not deteriorate even if the discharge voltage applied to the two-pole magnetizer is adjusted to a saturation state and magnetized, the inventors have made various studies and found that It has been found that by providing an appropriate notch on the surface facing the magnetized magnet, the Bg distribution in the poles on the magnet surface becomes flat without peaks and torque linearity does not deteriorate. I completed this idea.
【００１１】 図１はこの考案による二極着磁器の一実施例を示す上面説明図である。 フラットコイル型ボイスコイルモーター用の永久磁石を着磁する二極着磁器で 、板状ヨーク１０に２極のポールピース１１，１２を配設してあり、各ポールピ ース１１，１２には、ボイスコイルモーターのフラットコイルが、所定の振れ角 ０°の位置で相対する永久磁石の位置で、相対するフラットコイルの形状に沿い 当該フラットコイル幅相当の幅を有する切欠部１３，１４を、図で各ポールピー ス１１，１２の上側外周面から中央部に設けてある。 また、各ポールピース１１，１２の外周面には巻線１５を施してあるが、前記 の切欠部１３，１４内にも同様に外周面から連続して巻回してある。FIG. 1 is a top view showing an embodiment of a bipolar magnetizer according to the present invention. This is a two-pole magnetizer that magnetizes a permanent magnet for a flat coil type voice coil motor. Two pole pieces 11 and 12 having two poles are arranged on a plate-like yoke 10. Each pole piece 11 and 12 includes The flat coil of the voice coil motor is provided with notches 13 and 14 having a width corresponding to the width of the flat coil along the shape of the flat coil facing each other at the position of the permanent magnet facing at the position of the predetermined deflection angle 0 °. Then, the pole pieces 11 and 12 are provided in the central portion from the outer peripheral surface thereof. Further, although the winding 15 is provided on the outer peripheral surface of each pole piece 11, 12, it is also continuously wound from the outer peripheral surface in the cutouts 13, 14.
【００１２】 上記構成からなる二極着磁器を用いて永久磁石の着磁を行うと、永久磁石の所 定の振れ角０°の位置に相対する位置に各ポールピース１１，１２の切欠部１３ ，１４があるため、二極着磁器に流す放電電圧を飽和状態に調整して着磁しても 、着磁後の磁石表面の極内Ｂｇ分布にピークが発生せずに平坦化された分布とな り、この磁石をボイスコイルモーターに使用するとトルクリニアリティが劣化し ない。When the permanent magnet is magnetized by using the two-pole magnetizer having the above-mentioned configuration, the notch 13 of each pole piece 11, 12 is located at a position opposite to the position where the predetermined deflection angle of the permanent magnet is 0 °. , 14, there is no peak in the in-pole Bg distribution on the magnet surface after magnetization even if the discharge voltage applied to the two-pole magnetizer is adjusted to a saturated state and the distribution is flattened. Therefore, when this magnet is used in a voice coil motor, torque linearity does not deteriorate.
【００１３】[0013]
上記構成からなるこの考案の二極着磁器を用いて、ボイスコイルモーター用の 最大エネルギー積が３０ＭＧＯｅであるＦｅ−Ｒ−Ｂ系磁石の二極着磁を行った 。着磁条件は、磁石厚み７．２ｍｍ、着磁電圧１４００Ｖ、コンデンサー容量２ ２５０μＦであった。 この考案の二極着磁器で着磁したＦｅ−Ｒ−Ｂ系磁石のＢｇ分布の測定結果を 図４に示す。 The Fe-RB magnet having the maximum energy product of 30 MGOe for a voice coil motor was subjected to two-pole magnetization by using the two-pole magnetizer of the present invention having the above structure. The magnetizing conditions were a magnet thickness of 7.2 mm, a magnetizing voltage of 1400 V, and a capacitor capacity of 2250 μF. FIG. 4 shows the measurement result of the Bg distribution of the Fe—R—B system magnet magnetized by the bipolar magnetizer of the present invention.
【００１４】 着磁後、ボイスコイルモーターに組み込み、フラットコイルの振れ角度と発生 トルクを調べて、振れ角±１１．５°の場合のトルクリニアリティを評価した。 測定結果を図５に示す如く、３．４％〜４．６％のトルクリニアリティを得た 。After being magnetized, it was incorporated into a voice coil motor, and the deflection angle of the flat coil and the generated torque were examined to evaluate the torque linearity when the deflection angle is ± 11.5 °. As shown in the measurement results of FIG. 5, torque linearity of 3.4% to 4.6% was obtained.
【００１５】 また、比較のため、図２の凹部溝を設けた以外は全く同仕様の二極着磁器を用 いて、同様に２極着磁を行った。 同様にボイスコイルモーターに組み込み、振れ角±１１．５°の場合のトルク リニアリティを評価したところ、６．９％〜８．９％であった。For comparison, a two-pole magnetizer having exactly the same specifications except that the concave groove shown in FIG. Similarly, when it was incorporated into a voice coil motor and the torque linearity was evaluated when the deflection angle was ± 11.5 °, it was 6.9% to 8.9%.
【００１６】[0016]
この考案による二極着磁器は、各ポールピースの被着磁磁石との所要対向面に 、適当な切欠部を設けることにより、二極着磁器に流す放電電圧を飽和状態に調 整して着磁しても、磁石表面の極内Ｂｇ分布にピークが発生せずに平坦化された 分布となり、ボイスコイルモーターに組み込み後のトルクリニアリティが劣化し ない。 従って、この考案による二極着磁器により、電圧の高低にかかわらず、最適磁 場状態で磁石を着磁することが可能になる。 The two-pole magnetizer according to the present invention adjusts the discharge voltage flowing to the two-pole magnetizer to a saturated state by providing an appropriate notch on the surface of each pole piece facing the magnetized magnet. Even if magnetized, the Bg distribution in the poles on the surface of the magnet has a flattened distribution without peaks, and the torque linearity after incorporation in the voice coil motor does not deteriorate. Therefore, the bipolar magnetizer according to the present invention makes it possible to magnetize the magnet in the optimum magnetic field state regardless of the voltage level.
【図１】この考案による二極着磁器の構成を示す上面説
明図である。FIG. 1 is an explanatory top view showing a configuration of a bipolar magnetizer according to the present invention.
【図２】従来の二極着磁器の構成を示す上面説明図であ
る。FIG. 2 is an explanatory top view showing a configuration of a conventional bipolar magnetizer.
【図３】フラットコイル型ボイスコイルモーターの斜視
説明図である。FIG. 3 is a perspective view of a flat coil type voice coil motor.
【図４】Ｆｅ−Ｒ−Ｂ系磁石のＢｇ分布を示すグラフで
ある。FIG. 4 is a graph showing Bg distribution of a Fe—R—B system magnet.
【図５】ボイスコイルモーターのフラットコイルの振れ
角度と発生トルクの関係を示すグラフである。FIG. 5 is a graph showing a relationship between a deflection angle of a flat coil of a voice coil motor and generated torque.
１ ヨーク ２，３ 永久磁石 ４ フラットコイル １０ ヨーク １１，１２ ポールピース １３，１４ 切欠部 １５ 巻線 １６，１７ 凹部溝 1 Yoke 2,3 Permanent Magnet 4 Flat Coil 10 Yoke 11,12 Pole Piece 13,14 Notch 15 Winding 16,17 Recessed Groove
Claims (1)
各ポールピースに巻線を施し、コンデンサー電源からの
放電電流により発生した磁界にて着磁する二極着磁器に
おいて、各ポールピースに被着磁磁石の所要面に対向す
る外周面からの切欠部を設け、切欠部を含む外周面に沿
って巻線を施したことを特徴とする二極着磁器。1. A two-pole magnetizer in which a plurality of pole pieces are arranged in a yoke, each pole piece is wound, and a magnetic field generated by a discharge current from a capacitor power supply magnetizes the pole piece. A two-pole magnetizer characterized in that a cutout is provided from an outer peripheral surface facing a required surface of a magnetized magnet, and a winding is provided along the outer peripheral surface including the cutout.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1992046030U JP2572299Y2 (en) | 1992-06-08 | 1992-06-08 | Two-pole magnetized permanent magnet for flat coil vibration type voice coil motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1992046030U JP2572299Y2 (en) | 1992-06-08 | 1992-06-08 | Two-pole magnetized permanent magnet for flat coil vibration type voice coil motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH062630U true JPH062630U (en) | 1994-01-14 |
| JP2572299Y2 JP2572299Y2 (en) | 1998-05-20 |
Family
ID=12735653
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1992046030U Expired - Lifetime JP2572299Y2 (en) | 1992-06-08 | 1992-06-08 | Two-pole magnetized permanent magnet for flat coil vibration type voice coil motor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2572299Y2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011510606A (en) * | 2008-01-21 | 2011-03-31 | アヴィオ エッセ．ピー．アー． | Reversible generator-electromagnetic device using motor operation |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6348807A (en) * | 1986-08-19 | 1988-03-01 | Hitachi Metals Ltd | Method of magnetization for rotor magnet |
-
1992
- 1992-06-08 JP JP1992046030U patent/JP2572299Y2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6348807A (en) * | 1986-08-19 | 1988-03-01 | Hitachi Metals Ltd | Method of magnetization for rotor magnet |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011510606A (en) * | 2008-01-21 | 2011-03-31 | アヴィオ エッセ．ピー．アー． | Reversible generator-electromagnetic device using motor operation |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2572299Y2 (en) | 1998-05-20 |
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