JP5769179B2 - Magnetic property tester - Google Patents

Magnetic property tester Download PDF

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JP5769179B2
JP5769179B2 JP2013018040A JP2013018040A JP5769179B2 JP 5769179 B2 JP5769179 B2 JP 5769179B2 JP 2013018040 A JP2013018040 A JP 2013018040A JP 2013018040 A JP2013018040 A JP 2013018040A JP 5769179 B2 JP5769179 B2 JP 5769179B2
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coil
magnetic
yokes
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JP2014149221A (en
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由人 城門
由人 城門
暁史 沓掛
暁史 沓掛
池田　哲
哲 池田
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Oita Prefectural Government
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Description

本発明は、積層した電磁鋼板からなる試料の磁気特性を試験するための磁気特性試験器に関するものである。   The present invention relates to a magnetic property tester for testing magnetic properties of a sample made of laminated electromagnetic steel sheets.

従来より、発電機や変圧器やモーターなどの電磁機器の鉄心として電磁鋼板が利用されている。単板からなる電磁鋼板であれば、日本工業規格に規格されている「電磁鋼板単板磁気特性試験方法」（非特許文献１参照。）を用いて鉄損特性や交流磁化特性や皮相電力特性などを測定することによって磁気特性を評価することができる。   Conventionally, electromagnetic steel sheets have been used as iron cores for electromagnetic devices such as generators, transformers and motors. In the case of an electromagnetic steel plate made of a single plate, iron loss characteristics, AC magnetization characteristics, and apparent power characteristics using the “magnetic sheet single-sheet magnetic property test method” (see Non-Patent Document 1) standardized by Japanese Industrial Standards. The magnetic characteristics can be evaluated by measuring the above.

この日本工業規格で定められた「電磁鋼板単板磁気特性試験方法」では、単板状の電磁鋼板を試料として用い、試料を励磁コイルとＢコイルの巻線の中に置くとともに、試料にヨークを接触させて閉磁気回路を構成する（図３参照。）。この電磁鋼板単板磁気特性試験方法では、試料の側面にヨークの端部の平坦面を接触させることで、試料に加わる磁界の分布や試料の内部の磁束の分布を略均一にしている。   In the “Magnetic Steel Sheet Single Sheet Magnetic Characteristic Testing Method” defined in this Japanese Industrial Standard, a single sheet-shaped electromagnetic steel sheet is used as a sample, the sample is placed in the windings of an exciting coil and a B coil, and the yoke is placed on the sample. To make a closed magnetic circuit (see FIG. 3). In this magnetic steel sheet single plate magnetic property test method, the distribution of the magnetic field applied to the sample and the distribution of magnetic flux inside the sample are made substantially uniform by bringing the flat surface of the end of the yoke into contact with the side surface of the sample.

そして、電磁鋼板単板磁気特性試験方法では、Ｂコイルを用いて試料の磁束密度を測定する。また、試料の磁界強度は、Ｈコイル法や励磁電流法で測定されるが、Ｈコイル法では、試料の下方又は上方のいずれか一方に所定距離だけ離してＨコイルを配置し、Ｈコイルで計測される磁界強度とＨコイルと試料との間の距離とを用いて試料の磁界強度を算出する。   In the electromagnetic steel sheet single plate magnetic property test method, the magnetic flux density of the sample is measured using a B coil. The magnetic field strength of the sample is measured by the H coil method or the excitation current method. In the H coil method, the H coil is arranged at a predetermined distance away from either the lower side or the upper side of the sample. The magnetic field strength of the sample is calculated using the measured magnetic field strength and the distance between the H coil and the sample.

日本工業規格 ＪＩＳ Ｃ２５５６ 「電磁鋼板単板磁気特性試験方法」Japanese Industrial Standards JIS C2556 “Magnetic Steel Sheet Single Sheet Magnetic Properties Test Method”

発電機や変圧器やモーターなどの電磁機器で用いられている鉄心は、渦電流の発生を抑制して渦電流損を低減するために、複数の電磁鋼板を積層させたものが利用されている。   Iron cores used in electromagnetic devices such as generators, transformers, and motors are made by laminating multiple electromagnetic steel sheets to suppress eddy currents and reduce eddy current loss. .

ところが、上記した電磁鋼板単板磁気特性試験方法は、単板の電磁鋼板を試料として用いる試験方法であるために、積層した電磁鋼板からなる試料について磁気特性を測定すると、積層した試料内部の磁気特性を良好に測定することができず、試料の磁気特性を精度良く正確に測定することが困難であった。   However, since the above-mentioned magnetic steel sheet single sheet magnetic property test method is a test method using a single sheet of magnetic steel sheet as a sample, when the magnetic properties of a sample made of laminated electromagnetic steel sheets are measured, The characteristics could not be measured well, and it was difficult to accurately and accurately measure the magnetic characteristics of the sample.

また、上記した電磁鋼板単板磁気特性試験方法では、試料の側面にヨークの端部の平坦面を接触させることで閉磁気回路を構成するようにしているために、積層した電磁鋼板からなる試料を用いた場合には、積層した各電磁鋼板とヨークとを良好に接触させることができず、試料に加わる磁界の分布や試料の内部の磁束の分布を均一にすることが困難であり、これによっても、試料の磁気特性を精度良く正確に測定することが困難であった。   In the magnetic steel sheet single-sheet magnetic property testing method described above, a closed magnetic circuit is configured by bringing the flat surface of the end of the yoke into contact with the side surface of the sample. When this is used, it is difficult to make good contact between the laminated electromagnetic steel sheets and the yoke, and it is difficult to make the distribution of the magnetic field applied to the sample and the distribution of the magnetic flux inside the sample uniform. Therefore, it is difficult to accurately and accurately measure the magnetic characteristics of the sample.

そこで、請求項１に係る本発明では、上下に積層した電磁鋼板からなる試料の磁気特性を試験するための磁気特性試験器において、試料の積層方向（上下方向）に対して、試料の磁界強度を測定するためのＨコイルを試料の上下左右にそれぞれ配置し、各Ｈコイルの軸方向を前後方向に配置することにした。 Therefore, in the present invention according to claim 1, in the magnetic characteristics tester for testing the magnetic characteristics of the sample of the magnetic steel sheets are stacked vertically, the stacking direction of the sample (vertical direction), the magnetic field strength of the sample It was decided that the H coils for measuring the upper and lower sides and the left and right sides of the sample were arranged, and the axial direction of each H coil was arranged in the front-rear direction .

また、請求項２に係る本発明では、前記請求項１に係る本発明において、前記試料の端部に接触する一対のヨークを試料に対して接離自在に設けるとともに、各ヨークの端部を凹状に形成して、一対のヨークの両端部で試料の両端部を挟持するように構成することにした。   Further, in the present invention according to claim 2, in the present invention according to claim 1, a pair of yokes that come into contact with the end portions of the sample are provided so as to be able to contact with and separate from the sample, and the end portions of the yokes are The concave portions were formed so that both end portions of the sample were sandwiched between both end portions of the pair of yokes.

また、請求項３に係る本発明では、前記請求項１に係る本発明において、前記試料の端部に接触する一対のヨークを試料に対して接離自在に設けるとともに、一対のヨークの間に引張力を作用させて、一対のヨークの両端部で試料の両端部を挟持するように構成することにした。   According to a third aspect of the present invention, in the first aspect of the present invention, the pair of yokes that come into contact with the end portions of the sample are provided so as to be able to come into contact with and separate from the sample, and between the pair of yokes. It was decided that the both ends of the sample were sandwiched between the ends of the pair of yokes by applying a tensile force.

また、請求項４に係る本発明では、前記請求項１に係る本発明において、試料の磁束密度を測定するためのＢコイルの内側に空隙補償コイルを配置することにした。   Further, in the present invention according to claim 4, in the present invention according to claim 1, the air gap compensation coil is arranged inside the B coil for measuring the magnetic flux density of the sample.

そして、本発明では、以下に記載する効果を奏する。   And in this invention, there exists an effect described below.

すなわち、本発明では、積層した電磁鋼板からなる試料の磁気特性を試験するための磁気特性試験器において、試料の磁界強度を測定するためのＨコイルを試料の上下左右にそれぞれ配置することにしているために、積層した電磁鋼板からなる試料の磁気特性を精度良く正確に測定することができる。   That is, in the present invention, in a magnetic property tester for testing the magnetic properties of a sample made of laminated electromagnetic steel sheets, the H coils for measuring the magnetic field strength of the sample are respectively arranged on the top, bottom, left and right of the sample. Therefore, it is possible to accurately and accurately measure the magnetic characteristics of a sample made of laminated electromagnetic steel sheets.

特に、試料の端部に接触する一対のヨークを試料に対して接離自在に設けるとともに、各ヨークの端部を凹状に形成して、一対のヨークの両端部で試料の両端部を挟持するように構成した場合には、積層した電磁鋼板からなる試料とヨークとを良好に近接させることができるので、試料に加わる磁界の分布や試料の内部の磁束の分布を均一にすることができ、磁気特性をより一層精度良く正確に測定することができる。   In particular, a pair of yokes that come into contact with the end portions of the sample are provided so as to be able to contact with and separate from the sample, and the end portions of each yoke are formed in a concave shape so that both end portions of the sample are sandwiched between both end portions of the pair of yokes. When configured as described above, since the sample made of laminated electromagnetic steel sheets and the yoke can be brought close to each other, the distribution of the magnetic field applied to the sample and the distribution of the magnetic flux inside the sample can be made uniform. Magnetic characteristics can be measured more accurately and accurately.

また、試料の端部に接触する一対のヨークを試料に対して接離自在に設けるとともに、一対のヨークの間に引張力を作用させて、一対のヨークの両端部で試料の両端部を挟持するように構成した場合にも、積層した電磁鋼板からなる試料とヨークとを良好に接触させることができるので、試料に加わる磁界の分布や試料の内部の磁束の分布を均一にすることができ、磁気特性をより一層精度良く正確に測定することができる。   In addition, a pair of yokes that come into contact with the ends of the sample are provided so as to be able to contact with and separate from the sample, and a tensile force is applied between the pair of yokes so that both ends of the sample are sandwiched between both ends of the pair of yokes. Even in such a configuration, the sample made of laminated electromagnetic steel sheets and the yoke can be brought into good contact with each other, so that the distribution of the magnetic field applied to the sample and the distribution of the magnetic flux inside the sample can be made uniform. The magnetic characteristics can be measured with higher accuracy and accuracy.

さらに、試料の磁束密度を測定するためのＢコイルの内側に空隙補償コイルを配置した場合には、空隙補償コイルの効果を常に一定なものとすることができ、これによっても、磁気特性をより一層精度良く正確に測定することができる。   Furthermore, when the air gap compensation coil is arranged inside the B coil for measuring the magnetic flux density of the sample, the effect of the air gap compensation coil can be made constant at all times. It is possible to measure with higher accuracy and accuracy.

本発明に係る磁気特性試験器の構成を示す平面図。The top view which shows the structure of the magnetic property tester based on this invention. 同側面図。The same side view. 同試験回路図。The test circuit diagram. 同拡大断面図（（ａ）正面視、（ｂ）右側面視、（ｃ）平面視）The same expanded sectional view ((a) front view, (b) right side view, (c) plan view)

以下に、本発明に係る磁気特性試験器の具体的な構成について図面を参照しながら説明する。   The specific configuration of the magnetic property tester according to the present invention will be described below with reference to the drawings.

図１及び図２に示すように、磁気特性試験器１は、矩形平板状の電磁鋼板を上下に積層させた試料２について磁束密度や磁界強度などの磁気特性を測定するものである。   As shown in FIGS. 1 and 2, the magnetic property tester 1 measures magnetic properties such as magnetic flux density and magnetic field strength with respect to a sample 2 in which rectangular flat plate-shaped electromagnetic steel plates are stacked one above the other.

磁気特性試験器１は、概ね、試料２の磁気特性を測定するための測定機構３と、試料２に一対のヨーク4,5を接触させるヨーク調節機構６とを矩形板状の基台７に設けた構成となっている。   The magnetic property tester 1 generally includes a measuring mechanism 3 for measuring the magnetic properties of the sample 2 and a yoke adjusting mechanism 6 for bringing the pair of yokes 4 and 5 into contact with the sample 2 on a rectangular plate-like base 7. It has a configuration provided.

測定機構３は、基台７の上部中央にコイルユニット８を設け、コイルユニット８に図３に示す試験回路を接続している。   In the measurement mechanism 3, a coil unit 8 is provided at the upper center of the base 7, and the test circuit shown in FIG. 3 is connected to the coil unit 8.

コイルユニット８は、図４に示すように、ユニットホルダー９に図３に示す試験回路の励磁コイル10とＢコイル11とＨコイル12と空隙補償コイル13を収容するとともに、ユニットホルダー９の中央部に試料２を両端部を露出させた状態で挿通している。   As shown in FIG. 4, the coil unit 8 accommodates the excitation coil 10, the B coil 11, the H coil 12, and the air gap compensation coil 13 of the test circuit shown in FIG. The sample 2 is inserted in a state where both ends are exposed.

ユニットホルダー９は、励磁コイル10を外周部に巻回した中空状の励磁コイルホルダー14と、Ｂコイル11を外周部に巻回するとともに内部に空隙補償コイル13を収容した中空状のＢコイルホルダー15と、Ｈコイル12を保持する中空状のＨコイルホルダー16とで構成している。   The unit holder 9 includes a hollow excitation coil holder 14 in which the excitation coil 10 is wound around the outer periphery, and a hollow B coil holder in which the B coil 11 is wound around the outer periphery and the air gap compensation coil 13 is accommodated therein. 15 and a hollow H coil holder 16 holding the H coil 12.

励磁コイルホルダー14は、外周部に励磁コイル10を巻回するとともに、貫通する中空部にＢコイルホルダー15を挿通させている。   In the exciting coil holder 14, the exciting coil 10 is wound around the outer peripheral portion, and the B coil holder 15 is inserted through a hollow portion that penetrates the exciting coil holder 14.

Ｂコイルホルダー15は、上下側板17,18と左右側板19,20とから中空矩形断面状のＢコイル枠21を形成し、Ｂコイル枠21の外周部にＢコイル11を巻回するとともに、貫通する中空部にＨコイルホルダー16を挿通させている。   The B coil holder 15 forms a B coil frame 21 having a hollow rectangular cross section from upper and lower side plates 17, 18 and left and right side plates 19, 20, winds the B coil 11 around the outer periphery of the B coil frame 21, and penetrates The H coil holder 16 is inserted through the hollow portion.

また、Ｂコイルホルダー15は、Ｂコイル枠21の中空部の左右隅部それぞれに棒状の空隙補償コイル枠22を収容し、各空隙補償コイル枠22の外周部に空隙補償コイル13を巻回している。   The B coil holder 15 accommodates a rod-shaped air gap compensation coil frame 22 at each of the left and right corners of the hollow portion of the B coil frame 21, and the air gap compensation coil 13 is wound around the outer periphery of each air gap compensation coil frame 22. Yes.

Ｈコイルホルダー16は、Ｂコイル枠21の中空部に収容される凹形断面状のＨコイル支持体23の内側にＨコイル台25〜28を収容するとともに、Ｈコイル台25〜28の貫通する中空部に試料２を挿通させている。   The H coil holder 16 accommodates the H coil bases 25 to 28 inside the H coil support 23 having a concave cross-sectional shape housed in the hollow portion of the B coil frame 21 and penetrates the H coil bases 25 to 28. The sample 2 is inserted through the hollow portion.

Ｈコイル12は、上下一対のＨコイル台25,26と左右一対のＨコイル台27,28とで中空矩形断面形状を形成する各Ｈコイル台25〜28に収容している。各Ｈコイル台25〜28は、試料２に密着するように配置している。これにより、磁気特性試験器１では、試料２の上下左右（積層方向及びそれと直交する方向）にＨコイル12を配置している。なお、４個のＨコイル台25〜28でＨコイル枠24を構成している。   The H coil 12 is housed in each of the H coil bases 25 to 28 that form a hollow rectangular cross-sectional shape with a pair of upper and lower H coil bases 25 and 26 and a pair of left and right H coil bases 27 and 28. Each of the H coil bases 25 to 28 is disposed so as to be in close contact with the sample 2. As a result, in the magnetic property tester 1, the H coils 12 are arranged on the top, bottom, left, and right of the sample 2 (the stacking direction and the direction orthogonal thereto). The four H coil bases 25 to 28 constitute the H coil frame 24.

ヨーク調節機構６は、試料２の左右側部に配置した略コ字状の一対のヨーク4,5を試料２に対して進退移動可能としている。   The yoke adjusting mechanism 6 is configured to allow a pair of substantially U-shaped yokes 4 and 5 disposed on the left and right sides of the sample 2 to move forward and backward with respect to the sample 2.

すなわち、ヨーク調節機構６は、基台７の上部に左右方向（ヨーク4,5の進退移動方向）に沿って伸延させた前後一対のレール29を取付ける一方、矩形板状の一対のヨーク台30,31の下部に走行体32を取付け、走行体32をレール29に摺動自在に載置している。   That is, the yoke adjusting mechanism 6 attaches a pair of front and rear rails 29 extending in the left-right direction (advancing and retracting direction of the yokes 4 and 5) to the upper portion of the base 7, while a pair of rectangular plate-like yoke bases 30 are attached. , 31 is attached to the lower part of the vehicle 31, and the vehicle 32 is slidably mounted on the rail 29.

また、ヨーク調節機構６は、各ヨーク台30,31の上部に上下一対の摺動板33,34を載置するとともに、上側の摺動板33の上部に各ヨーク4,5を載置している。各ヨーク台30,31には、複数個の支持ピン35を様々な位置に着脱可能に配置しており、複数個の支持ピン35で各ヨーク4,5を各ヨーク台30,31に位置決めするようにしている。ここで、各ヨーク4,5は、両端部を凹状に形成することで凹部36,37を形成し、各凹部36,37の垂直面で試料２の側面と接触するようにしている。なお、凹部36,37の水平面の間隔を試料２の厚みと略同一にして試料２と凹部36,37の水平面との間隙が少なくなるようにしている。   Further, the yoke adjusting mechanism 6 places a pair of upper and lower sliding plates 33, 34 on the upper portions of the yoke bases 30, 31, and places the yokes 4, 5 on the upper portion of the upper sliding plate 33. ing. A plurality of support pins 35 are detachably disposed at various positions on each of the yoke bases 30 and 31, and the yokes 4 and 5 are positioned on the yoke bases 30 and 31 by the plurality of support pins 35. I am doing so. Here, the yokes 4 and 5 are formed with concave portions 36 and 37 by forming both end portions in a concave shape, and the vertical surfaces of the concave portions 36 and 37 are in contact with the side surface of the sample 2. The interval between the horizontal surfaces of the recesses 36 and 37 is substantially the same as the thickness of the sample 2 so that the gap between the sample 2 and the horizontal surfaces of the recesses 36 and 37 is reduced.

さらに、ヨーク調節機構６は、左側のヨーク台30の下部にブラケット38を取付け、右側のヨーク台31の下部にスプロケット39を取付け、基台７の左側部にスプロケット40とスライドレール41とを取付け、スライドレール41にスライド自在に取付けられたスライダー42とブラケット38との間にバネ43を懸架し、バネ43の中途部をスプロケット39,40に巻回している。スライダー42は、ネジ44でスライドレール41に固定できるようになっている。これにより、左右のヨーク台30,31（及びそれに載置されているヨーク4,5）は、バネ43の引張力によって試料２を挟持する方向に互いに引張されている。   Further, the yoke adjusting mechanism 6 has a bracket 38 attached to the lower part of the left yoke base 30, a sprocket 39 attached to the lower part of the right yoke base 31, and a sprocket 40 and a slide rail 41 attached to the left part of the base 7. A spring 43 is suspended between a slider 42 slidably attached to the slide rail 41 and a bracket 38, and a middle portion of the spring 43 is wound around the sprockets 39 and 40. The slider 42 can be fixed to the slide rail 41 with a screw 44. As a result, the left and right yoke bases 30 and 31 (and the yokes 4 and 5 mounted thereon) are pulled by each other in the direction in which the sample 2 is sandwiched by the tension force of the spring 43.

そして、ヨーク調節機構６は、スライダー42をスライド移動させることで、左右一対のヨーク台30,31をレール29に沿って互いに近接又は離反する方向に移動させることができる。図１(a)及び図２(a)に示すように、ヨーク台30,31を互いに離反させた場合には、一対のヨーク4,5が試料２から離れ、ユニットホルダー９から試料２や励磁コイルホルダー14やＢコイルホルダー15やＨコイルホルダー16などを着脱することができる。ユニットホルダー９に試料２などを装着した後に左右のヨーク台30,31を互いに近接する方向に移動させると、図１(b)及び図２(b)に示すように、左右のヨーク4,5で試料２を挟持することができる。この状態にて試料２の磁気特性の試験を行う。   The yoke adjusting mechanism 6 can move the pair of left and right yoke bases 30 and 31 along the rail 29 in a direction approaching or separating from each other by sliding the slider 42. As shown in FIGS. 1 (a) and 2 (a), when the yoke bases 30, 31 are separated from each other, the pair of yokes 4, 5 are separated from the sample 2, and the sample holder 2 and the excitation are separated from the unit holder 9. The coil holder 14, the B coil holder 15, the H coil holder 16, and the like can be attached and detached. When the left and right yoke bases 30, 31 are moved in the direction close to each other after the sample 2 is mounted on the unit holder 9, the left and right yokes 4, 5 as shown in FIGS. 1 (b) and 2 (b). Thus, the sample 2 can be clamped. In this state, the magnetic characteristics of the sample 2 are tested.

以上に説明したように、磁気特性試験器１は、積層した電磁鋼板からなる試料２の磁気特性を試験するものであり、試料２の磁界強度を測定するためのＨコイル12を試料２の上下左右にそれぞれ配置した構成となっている。   As described above, the magnetic property tester 1 tests the magnetic property of the sample 2 made of laminated electromagnetic steel sheets, and the H coil 12 for measuring the magnetic field strength of the sample 2 is placed above and below the sample 2. It has a configuration arranged on the left and right respectively.

そのため、上記構成の磁気特性試験器１では、試料２の上下左右表面に配置された４個のＨコイル12で測定した測定値に基づいて、それらの平均値や最小値・最大値や内挿値・外挿値などを利用することで、積層した電磁鋼板からなる試料２を用いた場合でも試料２の磁気特性を精度良く正確に測定することができる。   Therefore, in the magnetic property tester 1 having the above configuration, based on the measurement values measured by the four H coils 12 arranged on the upper, lower, left and right surfaces of the sample 2, those average values, minimum values, maximum values, and interpolations are performed. By using values, extrapolation values, etc., the magnetic properties of the sample 2 can be accurately and accurately measured even when the sample 2 made of laminated electromagnetic steel sheets is used.

また、上記磁気特性試験器１は、試料２の端部に接触する一対のヨーク4,5を試料２に対して接離自在に設けるとともに、各ヨーク4,5の端部を凹状に形成して、一対のヨーク4,5の両端部で試料２の両端部を挟持するように構成している。   In addition, the magnetic property tester 1 is provided with a pair of yokes 4 and 5 that come into contact with the end of the sample 2 so as to be able to contact with and separate from the sample 2 and the end of each yoke 4 and 5 is formed in a concave shape. Thus, both end portions of the sample 2 are sandwiched between both end portions of the pair of yokes 4 and 5.

そのため、上記構成の磁気特性試験器１では、積層した電磁鋼板からなる試料２とヨーク4,5とを試料２の積層方向及びそれと直交する方向において良好に近接させることができるので、試料２に加わる磁界の分布や試料２の内部の磁束の分布を均一にすることができ、積層した電磁鋼板からなる試料２を用いた場合でも試料２の磁気特性をより一層精度良く正確に測定することができる。   Therefore, in the magnetic property tester 1 having the above-described configuration, the sample 2 made of laminated electromagnetic steel sheets and the yokes 4 and 5 can be brought close to each other in the stacking direction of the sample 2 and the direction perpendicular thereto. The distribution of the applied magnetic field and the distribution of the magnetic flux inside the sample 2 can be made uniform, and even when the sample 2 made of laminated electromagnetic steel sheets is used, the magnetic properties of the sample 2 can be measured more accurately and accurately. it can.

また、上記磁気特性試験器１は、試料２の端部に接触する一対のヨーク4,5を試料２に対して接離自在に設けるとともに、一対のヨーク4,5の間に引張力を作用させて、一対のヨーク4,5の両端部で試料２の両端部を挟持するように構成している。   In addition, the magnetic property tester 1 is provided with a pair of yokes 4 and 5 that come into contact with the end of the sample 2 so as to be able to contact with and separate from the sample 2 and a tensile force is applied between the pair of yokes 4 and 5. Thus, both ends of the sample 2 are sandwiched between both ends of the pair of yokes 4 and 5.

そのため、上記構成の磁気特性試験器１では、積層した電磁鋼板からなる試料２とヨーク4,5とを所定の引張力で良好に接触させることができるので、試料２に加わる磁界の分布や試料２の内部の磁束の分布を均一にすることができ、磁気特性をより一層精度良く正確に測定することができる。   Therefore, in the magnetic property tester 1 having the above configuration, the sample 2 made of laminated electromagnetic steel sheets and the yokes 4 and 5 can be brought into good contact with a predetermined tensile force. 2 can be made uniform, and magnetic characteristics can be measured more accurately and accurately.

さらに、上記磁気特性試験器１は、試料２の磁束密度を測定するためのＢコイル11の内側に空隙補償コイル13を配置するように構成している。   Further, the magnetic property tester 1 is configured such that the air gap compensation coil 13 is disposed inside the B coil 11 for measuring the magnetic flux density of the sample 2.

そのため、上記構成の磁気特性試験器１では、空隙補償コイル13の効果を常に一定なものとすることができ、これによっても、磁気特性をより一層精度良く正確に測定することができる。   Therefore, in the magnetic characteristic tester 1 having the above-described configuration, the effect of the air gap compensation coil 13 can be made constant, and the magnetic characteristic can be measured with higher accuracy and accuracy.

１ 磁気特性試験器 ２ 試料
３ 測定機構 4,5 ヨーク
６ ヨーク調節機構 ７ 基台
８ コイルユニット ９ ユニットホルダー
10 励磁コイル 11 Ｂコイル
12 Ｈコイル 13 空隙補償コイル
14 励磁コイルホルダー 15 Ｂコイルホルダー
16 Ｈコイルホルダー 17,18 上下側板
19,20 左右側板 21 Ｂコイル枠
22 空隙補償コイル枠 23 Ｈコイル支持体
24 Ｈコイル枠 25,26,27,28 Ｈコイル台
29 レール 30,31 ヨーク台
32 走行体 33,34 摺動板
35 支持ピン 36,37 凹部
38 ブラケット 39,40 スプロケット
41 スライドレール 42 スライダー
43 バネ 44 ネジ DESCRIPTION OF SYMBOLS 1 Magnetic characteristic tester 2 Sample 3 Measuring mechanism 4,5 Yoke 6 Yoke adjustment mechanism 7 Base 8 Coil unit 9 Unit holder
10 Excitation coil 11 B coil
12 H coil 13 Air gap compensation coil
14 Excitation coil holder 15 B coil holder
16 H coil holder 17,18 Top and bottom plates
19,20 Left right plate 21 B Coil frame
22 Air gap compensation coil frame 23 H coil support
24 H coil frame 25,26,27,28 H coil stand
29 rail 30,31 York stand
32 Running body 33, 34 Sliding plate
35 Support pin 36, 37 Recess
38 Bracket 39,40 Sprocket
41 Slide rail 42 Slider
43 Spring 44 Screw

Claims (4)

上下に積層した電磁鋼板からなる試料の磁気特性を試験するための磁気特性試験器において、
試料の積層方向（上下方向）に対して、試料の磁界強度を測定するためのＨコイルを試料の上下左右にそれぞれ配置し、各Ｈコイルの軸方向を前後方向に配置したことを特徴とする磁気特性試験器。 In a magnetic property tester for testing the magnetic properties of a sample made of electromagnetic steel plates stacked one above the other ,
With respect to the sample stacking direction (vertical direction), H coils for measuring the magnetic field strength of the sample are arranged on the top, bottom, left and right of the sample, respectively , and the axial direction of each H coil is arranged in the front-rear direction. Magnetic property tester. 前記試料の端部に接触する一対のヨークを試料に対して接離自在に設けるとともに、各ヨークの端部を凹状に形成して、一対のヨークの両端部で試料の両端部を挟持するように構成したことを特徴とする請求項１に記載の磁気特性試験器。   A pair of yokes in contact with the end portions of the sample are provided so as to be able to contact with and separate from the sample, and the end portions of each yoke are formed in a concave shape so that the both end portions of the sample are sandwiched between both end portions of the pair of yokes. The magnetic property tester according to claim 1, wherein the magnetic property tester is configured as follows. 前記試料の端部に接触する一対のヨークを試料に対して接離自在に設けるとともに、一対のヨークの間に引張力を作用させて、一対のヨークの両端部で試料の両端部を挟持するように構成したことを特徴とする請求項１に記載の磁気特性試験器。   A pair of yokes in contact with the end portions of the sample are provided so as to be able to contact with and separate from the sample, and a tensile force is applied between the pair of yokes so that both end portions of the sample are sandwiched between both ends of the pair of yokes. The magnetic property tester according to claim 1, which is configured as described above. 試料の磁束密度を測定するためのＢコイルの内側に空隙補償コイルを配置したことを特徴とする請求項１に記載の磁気特性試験器。
2. The magnetic property tester according to claim 1, wherein a gap compensation coil is arranged inside the B coil for measuring the magnetic flux density of the sample.
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