JP5212858B2 - Linear resonance vibration type electromagnetic drive (LROMA, Linear Resonant Oscillator Magnetic Actuator) - Google Patents
Linear resonance vibration type electromagnetic drive (LROMA, Linear Resonant Oscillator Magnetic Actuator) Download PDFInfo
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- JP5212858B2 JP5212858B2 JP2007176728A JP2007176728A JP5212858B2 JP 5212858 B2 JP5212858 B2 JP 5212858B2 JP 2007176728 A JP2007176728 A JP 2007176728A JP 2007176728 A JP2007176728 A JP 2007176728A JP 5212858 B2 JP5212858 B2 JP 5212858B2
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- mover
- electromagnet
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- permanent magnet
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Description
本発明は、電磁機械のリニアー振動アクチュエーター（Ｌｉｎｅａｒ Ｒｅｓｏｎａｎｔ Ｏｓｃｉｌｌａｔｏｒｙ Ｍａｇｎｅｔｉｃ Ａｃｔｕａｔｏｒ）に関するものである。The present invention relates to a linear vibration actuator (Linear Resonant Oscillator Magnetic Actuator) of an electromagnetic machine.
従来のリニアー振動アクチュエーター（ＬＯＡ）では、系に蓄積された電磁エネルギーを消費することによる可動子の推力は
Ｆ＝Ｈｄ＊ｌｍ＊Ｎ＊Ｉ＊ｄｐ／ｄｘ
で与えられる。但し
Ｈｄ＝永久磁石内の単位長さあたりの起磁力
ｌｍ＝永久磁石の長さ
Ｎ＝コイルの巻き数
Ｉ＝励磁回路に流れる電流
ｐ＝磁気抵抗の逆数（パーミアンス）
ｘ＝可動子の空間的変位
である。つまり、従来のＬＯＡにおいては、磁気回路の空隙内の可動子は永久磁石の起磁力Ｈｄとｄｐ／ｄｘに比例する推力Ｆを受け（文献４６ページ参照）、可動子の位置が変化することにより磁気回路のコイルには速度起電力が発生する（文献４６ページ参照）。In the conventional linear vibration actuator (LOA), the thrust of the mover by consuming the electromagnetic energy accumulated in the system is F = Hd * lm * N * I * dp / dx
Given in. However,
Hd = magnetomotive force per unit length in the permanent magnet
lm = length of permanent magnet
N = number of turns of coil
I = current flowing in the excitation circuit
p = reciprocal of magnetic resistance (permeance)
x = spatial displacement of the mover. That is, in the conventional LOA, the mover in the gap of the magnetic circuit receives a thrust F proportional to the magnetomotive force Hd and dp / dx of the permanent magnet (see page 46), and the position of the mover changes. A speed electromotive force is generated in the coil of the magnetic circuit (see page 46).
山田一、山川和郎共著「リニアーモーターとその応用、電気学会アクチュエーター調査専門委員会編」、（昭和５９年５月３０日発行）Jointly written by Hajime Yamada and Kazuo Yamakawa, “Linear Motors and Their Applications, Actuation Research Committee of the Institute of Electrical Engineers of Japan” (issued May 30, 1984)
従来のＬＯＡでは磁気回路内の空隙のパーミアンスｐは可動子の位置の変位ｘの関数となるから、可動子が運動するとｄｐ／ｄｘ≠０となるために、磁気回路のコイルには速度起電力が発生する、したがって系に蓄えられた電磁エネルギーは可動子の推力として消費される。In the conventional LOA, since the permeance p of the air gap in the magnetic circuit is a function of the displacement x of the position of the mover, dp / dx ≠ 0 when the mover moves. Therefore, the electromagnetic energy stored in the system is consumed as the thrust of the mover.
本発明ＬＲＯＭＡでは、このような従来の問題を解決することを目的とするもので、磁気回路の空隙のパーミアンスｐは可動子の位置の変位ｘの関数とならず、しかも直列磁気回路を構成するように、磁気回路の空隙と可動子の配置ならびに形状を設計したために、磁気回路のコイルには速度起電力を誘導しない。The LROMA of the present invention aims to solve such a conventional problem, and the permeance p of the air gap of the magnetic circuit is not a function of the displacement x of the position of the mover, and constitutes a series magnetic circuit. Thus, since the arrangement and shape of the gap and the mover of the magnetic circuit are designed, no speed electromotive force is induced in the coil of the magnetic circuit.
本発明、ＬＲＯＭＡでは空隙のパーミアンスｐが可動子の位置に依存しないから、空隙内で可動子が往復運動しても磁気回路のコイルに速度起電力が誘起されない。また、負荷を含めた可動子の固有振動数を電源周波数と一致させることにより、電磁気学と機械力学の両方の範疇における共鳴振動過程を利用することが可能になり、これにより可動子の振幅を増幅することができる。
したがって本発明では、空隙の可動子の推力は、可動子と固定子で構成される系に蓄積された電磁エネルギーに由来する速度起電力を誘起しないで、励磁コイルの無効電力エネルギーを機械エネルギーとして取り出す効果がある。In the present invention and LROMA, since the permeance p of the gap does not depend on the position of the mover, even if the mover reciprocates within the gap, no speed electromotive force is induced in the coil of the magnetic circuit. In addition, by matching the natural frequency of the mover including the load with the power supply frequency, it is possible to use the resonance vibration process in both the electromagnetics and mechanical mechanics categories, thereby reducing the amplitude of the mover. Can be amplified.
Therefore, in the present invention, the thrust of the mover in the gap does not induce the speed electromotive force derived from the electromagnetic energy accumulated in the system composed of the mover and the stator, and the reactive power energy of the exciting coil is used as the mechanical energy. There is an effect to take out.
本発明ＬＲＯＭＡは、図１に示されるように固定子の励磁コイルに対して空隙の磁気抵抗ＺａとＺｂが直列になるように可動子−固定子系を配置する。
図２に示される左の空隙の長さをＩａ、右の空隙の長さをＩｂとする。左の空隙の磁気抵抗がＺａで左の空隙の透磁率をμとし、右の空隙の磁気抵抗がＺｂで右の空隙の透磁率をμとする。固定子の断面積と可動子の断面積を等しくし、これをＳｏとする。可動子の断面の中心を固定子の断面の中心を通る軸上に配置する。
図３に示すように、可動子の両端が同極（たとえばＮ極）になるように２個の永久磁石を接合する。
つぎに動作について説明する。まず固定子の励磁コイルに流れる交流電流により磁気回路の両端には対応するＮ極またはＳ極の磁極対が発生し、この磁極対が磁気回路の空隙に磁場を発生させる。この磁場の強さは［アンペア・巻き数／メートル］で表現される。可動子の両端に配置された同一極の磁極対はいずれも磁気回路の空隙に発生する磁場のために磁気に関する同一方向のクーロン力を受け、したがって可動子は固定子の軸方向に沿って移動する。
可動子の左側の空隙Ｉａの磁気抵抗はＺａ＝Ｉａ／（μＳｏ）で、可動子の右側の空隙Ｉｂの磁気抵抗はＺｂ＝Ｉｂ／（μＳｏ）であるから、直列磁気回路の抵抗はＺ＝Ｚａ＋Ｚｂ＝［Ｉａ＋Ｉｂ］／（μＳｏ）と書かれる。したがって、可動子が軸方向に位置Ｘをどれだけ移動しても、左側の空隙と右側の空隙の長さの和Ｉａ＋Ｉｂは一定値を保つ。つまり磁気回路の特性を示す磁気抵抗Ｚが可動子の変位ｘには依存せず一定であり、したがってパーミアンスｐ＝１／Ｚもまた可動子の変位ｘには無関係でｄｐ／ｄｘ＝０となる。換言すると可動子が平衡位置から任意の距離ｘだけ移動したとき、直列磁気回路系全体のパーミアンスのｘ微分はゼロになるのである。
さらに、可動子に負荷を結合することにより、可動部分の固有振動数と電源周波数を共鳴させて、可動部分の振動を増幅させる。また励磁回路に供給する電源電流を最小限に抑えるために、インダクタンスとコンデンサーの並列共振回路を構成する。As shown in FIG. 1, the LROMA of the present invention arranges the mover-stator system so that the magnetic resistances Za and Zb of the air gap are in series with respect to the exciting coil of the stator.
The length of the left gap shown in FIG. 2 is Ia, and the length of the right gap is Ib. The magnetic resistance of the left air gap is Za and the magnetic permeability of the left air gap is μ, the magnetic resistance of the right air gap is Zb, and the magnetic permeability of the right air gap is μ. The cross-sectional area of the stator and the cross-sectional area of the mover are made equal, and this is defined as So. The center of the cross section of the mover is arranged on an axis passing through the center of the cross section of the stator.
As shown in FIG. 3, two permanent magnets are joined so that both ends of the mover have the same polarity (for example, N pole).
Next, the operation will be described. First, a corresponding N-pole or S-pole pair is generated at both ends of the magnetic circuit by an alternating current flowing through the stator exciting coil, and this magnetic pole pair generates a magnetic field in the air gap of the magnetic circuit. The strength of this magnetic field is expressed in [ampere / number of turns / meter]. Both magnetic pole pairs with the same polarity placed at both ends of the mover receive the same magnetic Coulomb force due to the magnetic field generated in the magnetic circuit gap, so the mover moves along the axial direction of the stator. To do.
Since the magnetic resistance of the gap Ia on the left side of the mover is Za = Ia / (μSo) and the magnetic resistance of the gap Ib on the right side of the mover is Zb = Ib / (μSo), the resistance of the series magnetic circuit is Z = Za + Zb = [Ia + Ib] / (μSo) is written. Therefore, no matter how much the mover moves in the axial direction X, the sum Ia + Ib of the length of the left gap and the right gap maintains a constant value. That is, the magnetic resistance Z indicating the characteristics of the magnetic circuit is constant without depending on the displacement x of the mover, and therefore the permeance p = 1 / Z is also independent of the displacement x of the mover and dp / dx = 0. . In other words, when the mover moves by an arbitrary distance x from the equilibrium position, the x derivative of the permeance of the entire series magnetic circuit system becomes zero.
Furthermore, by coupling a load to the mover, the natural frequency of the movable part and the power supply frequency are resonated to amplify the vibration of the movable part. In order to minimize the power supply current supplied to the excitation circuit, a parallel resonance circuit of an inductance and a capacitor is configured.
もっとも理想的な産業上の利用可能性は、往復運動を行う振動型発電機と上の発明ＬＲＯＭＡを組み合わせて電力発生装置とすることである。 The most ideal industrial applicability is to combine the vibration generator that performs reciprocating motion with the above-described invention LROMA to form a power generator.
Claims (1)
鉄芯にコイルを巻いた電磁石の両端の磁極が交互に反転するように交流電源を印加した交流電磁石を設け、この交流電磁石の一対の極を対向させて出来た空隙の中間に両端が同極に着磁した永久磁石を可動子として配置し、交流電磁石の一対の極と永久磁石の間に二つの空隙が構成され、前記電磁石の軸と前記永久磁石の軸は同軸に配置し、かつ、前記電磁石の端面の面積及び形状を前記永久磁石の断面積及び断面形状と同じにするとともに、 可動子に負荷を結合し、可動子及び駆動される負荷を含めた可動部の固有振動数を電源周波数と一致させた共鳴振動過程を利用して可動部の往復運動を増幅する方法。The linear oscillatory actuator (LOA) that drives the load by reciprocating the mover with an electromagnet using an AC power supply so as not to generate a speed electromotive force is used. A method of amplifying reciprocating motion,
An AC electromagnet applied with an AC power supply is provided so that the magnetic poles at both ends of an electromagnet wound with a coil around an iron core are alternately reversed, and both ends have the same polarity in the middle of a gap formed by facing a pair of poles of this AC electromagnet A permanent magnet magnetized as a movable element, two gaps are formed between a pair of poles of the AC electromagnet and the permanent magnet, the axis of the electromagnet and the axis of the permanent magnet are arranged coaxially, and The area and shape of the end face of the electromagnet are the same as the cross-sectional area and cross-sectional shape of the permanent magnet, and a load is coupled to the mover, and the natural frequency of the movable part including the mover and the driven load is supplied as a power source. A method of amplifying the reciprocating motion of a movable part using a resonant vibration process matched with the frequency.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2007176728A JP5212858B2 (en) | 2007-06-07 | 2007-06-07 | Linear resonance vibration type electromagnetic drive (LROMA, Linear Resonant Oscillator Magnetic Actuator) |
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|---|---|---|---|
| JP2007176728A JP5212858B2 (en) | 2007-06-07 | 2007-06-07 | Linear resonance vibration type electromagnetic drive (LROMA, Linear Resonant Oscillator Magnetic Actuator) |
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|---|---|
| JP2008306911A JP2008306911A (en) | 2008-12-18 |
| JP5212858B2 true JP5212858B2 (en) | 2013-06-19 |
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| JP2007176728A Expired - Fee Related JP5212858B2 (en) | 2007-06-07 | 2007-06-07 | Linear resonance vibration type electromagnetic drive (LROMA, Linear Resonant Oscillator Magnetic Actuator) |
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| JPS5334851B2 (en) * | 1973-02-20 | 1978-09-22 | ||
| JPS533376A (en) * | 1976-06-30 | 1978-01-13 | Matsushita Electric Works Ltd | Motion converter |
| JPS5556483A (en) * | 1978-10-18 | 1980-04-25 | Hitachi Ltd | Voltage control method of inverter |
| JPS61277358A (en) * | 1985-05-31 | 1986-12-08 | Machiko Yasaka | Upright motor |
| JPS6270675A (en) * | 1985-09-24 | 1987-04-01 | Hitachi Ltd | Air cooled compressor integrated with refrigerating type dehumidifier for compressed air |
| JPS6373860A (en) * | 1986-09-16 | 1988-04-04 | Daihou Giken Kk | Reciprocating actuator |
| JPH07240311A (en) * | 1994-03-01 | 1995-09-12 | Shindengen Electric Mfg Co Ltd | Rotary solenoid |
| JP2000070855A (en) * | 1998-08-31 | 2000-03-07 | Onkyooribu Kk | Shaker and mechanical vibration sensing device |
| JP2003188012A (en) * | 2001-12-21 | 2003-07-04 | Toda Kogyo Corp | Magnet for reciprocating mechanism and reciprocating mechanism using the magnet |
| JP2004064852A (en) * | 2002-07-26 | 2004-02-26 | Matsushita Refrig Co Ltd | Linear motor and linear motor compressor |
| JP2004320827A (en) * | 2003-04-11 | 2004-11-11 | Toda Kogyo Corp | Magnet for reciprocating apparatus, and reciprocating apparatus using the same |
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