JP4660110B2 - STATOR CORE MAGNETIC MEASURING DEVICE AND MAGNETIC MEASURING METHOD - Google Patents
STATOR CORE MAGNETIC MEASURING DEVICE AND MAGNETIC MEASURING METHOD Download PDFInfo
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Description
本発明は、ヨークとティースからなるステータコアの磁気特性を、実際にモータを駆動しない静的な状態で測定するステータコアの磁気測定装置および磁気測定方法に関する。 The present invention relates to a magnetic measurement apparatus and a magnetic measurement method for a stator core that measure magnetic characteristics of a stator core composed of a yoke and teeth in a static state where the motor is not actually driven.
永久磁石同期モータは、ステータ（固定子）に電流を流すことにより発生する磁場が、ロータ（回転子）に埋め込まれた永久磁石に働いて、ロータが回転するモータであって、保守性、制御性、耐環境性に優れ、高効率、高力率運転が可能な電動機として産業・民生家電分野を問わず広く用いられている。
通常、このステータコアは、外周部を構成する円盤状のヨークと、内周部を構成する歯型状のティースからなっている。
A permanent magnet synchronous motor is a motor in which a magnetic field generated by passing a current through a stator (stator) works on a permanent magnet embedded in a rotor (rotor), and the rotor rotates. It is widely used as an electric motor that excels in safety and environmental resistance, and is capable of high-efficiency and high-power factor operation, regardless of the industrial or consumer electronics field.
Usually, the stator core is composed of a disk-shaped yoke that forms the outer peripheral portion and a tooth-shaped tooth that forms the inner peripheral portion.
従来、ステータコアの磁気特性を評価する場合、外周部のヨークに使用する鋼板の磁気特性を測定することによって、ステータコアの磁気特性の指標としていた。
しかし、実際のステータコアは、前述のように、ヨークとティースからなり、発明者らの検討結果によると、ティースの形状や、ヨークとの接合方法によって、ステータコアの磁気特性が著しく異なることが分かってきており、従来のように、ヨークだけでステータコアの磁気特性を代表させると実際のステータコアの磁気特性と著しく異なるという問題点があった。
また、実際のモータを駆動した状態における磁気特性を測定する方法も考えられるが、これでは、モータ回転軸の機械損失や磁気波形の歪みに起因する制御損失などの外乱要因が含まれるため、ステータコアの形状や接合方法と磁気特性との関係を適正に評価することができなかった。
さらに、ステータコアは、焼き嵌めによって電動機に組み込まれるため、実際の使用状態ではステータコアの周方向に圧縮力が働いた状態となっており、従来の磁気測定装置では、この圧縮力状態における磁気特性を評価することができなかった。
Conventionally, when evaluating the magnetic characteristics of the stator core, the magnetic characteristics of the steel sheet used for the outer peripheral yoke are measured to provide an index of the magnetic characteristics of the stator core.
However, as described above, an actual stator core is composed of a yoke and teeth, and according to the results of investigations by the inventors, it has been found that the magnetic properties of the stator core differ significantly depending on the shape of the teeth and the method of joining with the yoke. As in the prior art, if the magnetic characteristics of the stator core are represented only by the yoke, there is a problem that the magnetic characteristics of the actual stator core are significantly different.
In addition, a method of measuring the magnetic characteristics in the state where the actual motor is driven is also conceivable, but this includes disturbance factors such as mechanical loss of the motor rotation shaft and control loss due to distortion of the magnetic waveform. The relationship between the shape, bonding method and magnetic properties could not be properly evaluated.
Furthermore, since the stator core is incorporated into the electric motor by shrink fitting, the compression force is applied in the circumferential direction of the stator core in the actual use state. In the conventional magnetic measuring device, the magnetic characteristics in this compression force state are obtained. Could not be evaluated.
なお、ステータコアの磁気測定装置に関しては、従来から種々の提案がなされており、例えば、特開平７-２１８６１０号公報には、モータコアを、試料ホルダーを介してベアリングで支持するにあたり、モータコアとベアリングとの位置関係が縦に並んでいることによって、実際にモータで使われているモータコアの鉄損を測定する装置が提案されている。
また、特開２０００-３５２５７９号公報には、電動機の作動状態下において固定子鉄心（ステータコア）の端部表面による各種磁気特性を正確に検出する装置が提案されている。
しかし、特開平７-２１８６１０号公報や特開２０００-３５２５７９号公報に開示された磁気測定装置は、モータの駆動中の磁気特性を測定する装置であって、この場合、前述のように、モータ回転軸の機械損失や磁気波形の歪みに起因する制御損失などの外乱要因が含まれるため、ステータコアの形状や接合方法と磁気特性との関係を適正に評価することができなかった。
Various proposals have been made regarding the magnetic measuring device for the stator core. For example, in Japanese Patent Application Laid-Open No. 7-218610, when a motor core is supported by a bearing via a sample holder, the motor core and the bearing A device for measuring the iron loss of a motor core actually used in a motor has been proposed.
Japanese Patent Application Laid-Open No. 2000-352579 proposes an apparatus for accurately detecting various magnetic characteristics due to the end surface of the stator core (stator core) under the operating state of the electric motor.
However, the magnetic measurement devices disclosed in Japanese Patent Application Laid-Open Nos. 7-218610 and 2000-352579 are devices that measure magnetic characteristics during driving of the motor. In this case, as described above, the motor Since disturbance factors such as control loss due to mechanical loss of the rotating shaft and distortion of the magnetic waveform are included, the relationship between the shape of the stator core, the joining method, and the magnetic characteristics could not be properly evaluated.
本発明は、前記のような従来技術の問題点を解決し、ヨークとティースからなるステータコアの磁気測定装置であって、ティースの形状や接合方法と磁気特性の関係を適正に評価できるうえ、ステータコアの径方向および／または軸方向に圧縮力が働いた状態における磁気特性を測定することができるステータコアの磁気測定装置および磁気測定方法を提供することを課題とする。 The present invention solves the problems of the prior art as described above, and is a magnetic measuring device for a stator core composed of a yoke and a tooth, which can properly evaluate the relationship between the shape of the teeth, the joining method, and the magnetic characteristics, and the stator core It is an object of the present invention to provide a magnetic measurement apparatus and a magnetic measurement method for a stator core capable of measuring magnetic characteristics in a state where a compressive force is applied in the radial direction and / or the axial direction.
本発明は、ヨークとティースからなるステータコアの磁気測定装置において、ティースに接続して閉磁気回路を構成する継鉄部および第１のコイルと該ティースに巻かれる第２のコイルとを設けることによってティースの形状や接合方法と磁気特性の関係を適正に評価できるうえ、ステータコアの径方向および／または軸方向に締付ける冶具を設けることにより径方向および／または軸方向に圧縮力が働いた状態における磁気特性を測定することができるステータコアの磁気測定装置および磁気測定方法を提供するものであり、その要旨は特許請求の範囲に記載した通りの下記内容である。 According to the present invention, in a magnetometer for measuring a stator core comprising a yoke and a tooth, by providing a yoke part that is connected to the tooth to form a closed magnetic circuit, a first coil, and a second coil wound around the tooth. In addition to being able to properly evaluate the relationship between the shape and joining method of the teeth and the magnetic properties, it is also possible to provide magnetism in a state in which a compressive force is exerted in the radial direction and / or axial direction by providing a jig for fastening the stator core in the radial direction and / or axial direction. The present invention provides a magnetic measuring device and a magnetic measuring method for a stator core capable of measuring characteristics, the gist of which is as follows.
（１）ヨークとティースからなるステータコアの磁気測定装置であって、
前記ステータコアの中心に設置する第１のコイルを有し、かつ、
前記第１のコイルと前記ティースとを接続して閉磁気回路を形成する継鉄部と、前記ティースに巻かれた一つ以上の第２のコイルとを有することを特徴とするステータコアの磁気測定装置。
（２）前記ステータコアが外力で周方向に回転できる構造として、ステータコア全体の磁気測定を行うことができることを特徴とする（１）に記載のステータコアの磁気測定装置。
（３）前記ステータコアの径方向および/または軸方向に、該ステータコアを締付ける冶具を設けることを特徴とする（１）または（２）に記載のステータコアの磁気測定装置。
（４）（１）乃至（３）のいずれか一項に記載の磁気測定装置を用いる磁気測定方法であって、
前記第１のコイルを励磁コイルとし、前記第２のコイルを検出コイルとすることを特徴とするステータコアの磁気測定方法。
（５）（１）乃至（３）のいずれか一項に記載の磁気測定装置を用いる磁気測定方法であって、
前記第２のコイルの一方を励磁コイルとし、前記第２のコイルの他方を検出コイルとすることを特徴とするステータコアの磁気測定方法。
(1) A stator core magnetometer comprising a yoke and teeth,
Having a first coil installed in the center of the stator core ; and
A stator core magnetic measurement comprising: a yoke portion connecting the first coil and the teeth to form a closed magnetic circuit; and one or more second coils wound around the teeth. apparatus.
(2) The stator core magnetic measurement apparatus according to (1), wherein the stator core is configured to be capable of rotating in the circumferential direction by an external force, and can perform magnetic measurement of the entire stator core.
(3) The stator core magnetometer according to (1) or (2), wherein a jig for fastening the stator core is provided in a radial direction and / or an axial direction of the stator core.
(4) A magnetic measurement method using the magnetic measurement apparatus according to any one of (1) to (3),
A magnetic measurement method for a stator core, wherein the first coil is an excitation coil, and the second coil is a detection coil.
(5) A magnetic measurement method using the magnetic measurement apparatus according to any one of (1) to (3),
One of the second coils is an exciting coil, and the other one of the second coils is a detection coil.
本発明によれば、ヨークとティースからなるステータコアの磁気測定装置において、ティースに接続して閉磁気回路を構成する継鉄部および第１のコイルと該ティースに巻かれる第２のコイルとを設けることによってティースの形状や接合方法と磁気特性の関係を適正に評価できるうえ、ステータコアの径方向および／または軸方向に締付ける冶具を設けることにより径方向および／または軸方向に圧縮力が働いた状態における磁気特性を測定することができるステータコアの磁気測定装置および磁気測定方法を提供することができるなど、産業上有用な著しい効果を奏する。 According to the present invention, in a magnetometer for measuring a stator core composed of a yoke and teeth, a yoke part and a first coil that are connected to the teeth to form a closed magnetic circuit and a second coil wound around the teeth are provided. Therefore, it is possible to properly evaluate the relationship between the shape of the teeth, the joining method, and the magnetic properties, and a state in which a compressive force is exerted in the radial direction and / or the axial direction by providing a jig for fastening the stator core in the radial direction and / or the axial direction. It is possible to provide a magnetic measurement apparatus and a magnetic measurement method for a stator core that can measure the magnetic characteristics of the magnetic field.
本発明を実施するための形態を、図１乃至図３を用いて詳細に説明する。
図１および図２は、本発明におけるステータコアの磁気測定装置の実施形態を例示する図であり、図１は正面図、図２は図１のＡ矢視図である。
図１および図２において、１はステータコア、２はヨーク、３はティース、４は第１のコイル、５,５´は第２のコイル、６は継鉄部、７は継鉄支持部、８はバンド（冶具）、９,９´は締付け部、１０は試料支持部、１１は緩衝材、１２は補強板、１３は固定板（冶具）を示す。
本発明のステータコアの磁気測定装置は、ヨーク２とティース３からなるステータコア１を、実際にモータを駆動させない静的な状態で磁気測定を行う装置である。
図１において、ヨーク２およびティース３からなるステータコア１は、試料支持部１０に載置され、ステータコア１の中心に、鉄心にコイルを巻き付けた第１のコイル４を設け、この第１のコイル４とティース３とを継鉄部４によって接続して閉磁気回路を形成している。
このティース３と継鉄部４との接続部は、密着していることが好ましいが、ステータコア１を回転させる必要性があることから、継鉄部４の表面の加工精度を数μｍ以下に高めることによって、空隙による鉄損を小さくすることが好ましい。
図１に示すように、ステータコア１の中心に第１のコイル４を設置し、この第１のコイル４に電圧を印加して磁束を発生させ、この磁束を、継鉄部４を介してティース３に流し、このティース３に巻かれた第２のコイル５における電圧を検出することによって、ステータコア１の鉄損を測定することができる。
A mode for carrying out the present invention will be described in detail with reference to FIGS. 1 to 3.
1 and 2 are diagrams illustrating an embodiment of a magnetic measurement apparatus for a stator core according to the present invention. FIG. 1 is a front view, and FIG.
1 and 2, 1 is a stator core, 2 is a yoke, 3 is a tooth, 4 is a first coil, 5 and 5 'are second coils, 6 is a yoke part, 7 is a yoke support part, 8 Is a band (jig), 9, 9 'is a tightening part, 10 is a sample support part, 11 is a buffer material, 12 is a reinforcing plate, and 13 is a fixing plate (jig).
The stator core magnetometer of the present invention is a device for measuring magnetism of a stator core 1 comprising a yoke 2 and teeth 3 in a static state in which the motor is not actually driven.
In FIG. 1, a stator core 1 including a yoke 2 and a tooth 3 is placed on a sample support portion 10, and a first coil 4 in which a coil is wound around an iron core is provided at the center of the stator core 1. And the teeth 3 are connected by the yoke part 4 to form a closed magnetic circuit.
The connecting portion between the teeth 3 and the yoke portion 4 is preferably in close contact, but since the stator core 1 needs to be rotated, the processing accuracy of the surface of the yoke portion 4 is increased to several μm or less. Therefore, it is preferable to reduce the iron loss due to the air gap.
As shown in FIG. 1, a first coil 4 is installed in the center of the stator core 1, a voltage is applied to the first coil 4 to generate a magnetic flux, and this magnetic flux is passed through the yoke portion 4 to the teeth. 3 and the iron loss of the stator core 1 can be measured by detecting the voltage in the second coil 5 wound around the tooth 3.
本発明は、ヨーク２とティース３からなるステータコア１の磁気測定装置であって、前記ステータコア１の中心に設置する第１のコイル４と、該第１のコイル４と前記ティースと３を接続して閉磁気回路を形成する継鉄部６と、前記ティース３に巻かれた第２のコイル５とを有することを特徴とする。
従来における磁気測定装置は、ヨーク２を構成する鋼板の磁気測定を行って、ステータコア１の磁気測定を評価していたが、本発明によれば、ティース３に接続して閉磁気回路を構成する継鉄部６と該ティース３に巻かれる第２のコイル５とを設けることによってティース３の形状や接合方法と磁気特性の関係を適正に評価でできるうえ、モータを駆動させない静的な状態で磁気測定を行うので、モータ回転軸の機械損失や磁気波形の歪みに起因する制御損失などの外乱要因が含まれることがない。
また、図２に示すように、例えば、ステータコア１をネジなどの締付け部９´によって締め付けて固定することによって、この締付け部９´を緩めることによって、ステータコア１を外力で周方向に回転できる構造として、磁気測定を行う部分を順次移動させることができるので、ステータコア全体の磁気測定を行うことができる。
The present invention is a magnetic measuring apparatus for a stator core 1 comprising a yoke 2 and a tooth 3, wherein the first coil 4 installed at the center of the stator core 1 is connected to the first coil 4 and the teeth 3. It has the yoke part 6 which forms a closed magnetic circuit, and the 2nd coil 5 wound by the said teeth 3. It is characterized by the above-mentioned.
The conventional magnetism measuring device has performed magnetic measurement of the steel plate constituting the yoke 2 to evaluate the magnetic measurement of the stator core 1, but according to the present invention, it is connected to the tooth 3 to constitute a closed magnetic circuit. By providing the yoke portion 6 and the second coil 5 wound around the tooth 3, the relationship between the shape and joining method of the tooth 3 and the magnetic characteristics can be properly evaluated, and the motor is not driven in a static state. Since magnetic measurement is performed, disturbance factors such as a mechanical loss of the motor rotating shaft and a control loss due to distortion of the magnetic waveform are not included.
Further, as shown in FIG. 2, for example, the stator core 1 can be rotated in the circumferential direction by an external force by loosening the fastening portion 9 'by fastening the stator core 1 with a fastening portion 9' such as a screw. As described above, since the part where the magnetic measurement is performed can be sequentially moved, the magnetic measurement of the entire stator core can be performed.
本実施形態においては、ステータコア１の径方向（図１の矢印方向）に圧縮力を働かせるバンド（冶具）８を設けており、例えば、ネジからなる締付け部９を動かすことによって、ステータコア１を内側に締付けることができ、実際のモータにおいて、ステータコアを焼嵌めした場合と同じ径方向に圧縮された状態における磁気特性を測定することができる。
さらに、本実施形態においては、ステータコア１の中心に設置した第１のコイル５に電圧を印加しているが、ティース３に巻き付けた一方の第２のコイル５´に電圧を印加して励磁コイルとし、他方の第２のコイル５を検出コイルとして電圧を測定することによって、ステータコア１の一部を取り出した部分的な磁気特性を測定することができる。
なお、第２のコイル５、５´は、糸巻き状のボビンに巻き付けることにより、ティース３への着脱を容易に行うことができる。
また、第２のコイル５、５´は同一ティース上に設置してもよい。
さらに、第２のコイル５、５´はそれぞれのティースの複数個（含む全ティース）あってもよい。
In the present embodiment, a band (jig) 8 for applying a compressive force is provided in the radial direction of the stator core 1 (the arrow direction in FIG. 1). For example, the stator core 1 is moved to the inner side by moving a tightening portion 9 made of a screw. In an actual motor, it is possible to measure magnetic characteristics in a state where the stator core is compressed in the same radial direction as when the stator core is shrink-fitted.
Furthermore, in the present embodiment, a voltage is applied to the first coil 5 installed at the center of the stator core 1, but a voltage is applied to one second coil 5 ′ wound around the tooth 3 to excite the coil. Then, by measuring the voltage using the other second coil 5 as the detection coil, it is possible to measure a partial magnetic characteristic obtained by extracting a part of the stator core 1.
The second coils 5 and 5 ′ can be easily attached to and detached from the teeth 3 by being wound around a bobbin having a bobbin shape.
Moreover, you may install the 2nd coils 5, 5 'on the same teeth.
Further, the second coils 5 and 5 'may include a plurality (including all teeth) of the respective teeth.
図２は、図１のＡ矢視図を示しており、磁気測定装置に大きな振動が伝わらないように、例えばウレタンゴムなどの緩衝材１１を介して補強板１２を設けることが好ましい。
また、図２に示すように、ステータコア１の軸方向（図２の矢印方向）に圧縮力を働かせる固定板（冶具）１３およびネジなどの締付け部９´を設けることにより、ステータコア１を軸方向に締付けることができ、実際のモータにおいて、ステータコアを焼嵌めした場合と同じ軸方向に圧縮された状態における磁気特性を測定することができる。
FIG. 2 shows a view as viewed in the direction of arrow A in FIG. 1, and it is preferable to provide a reinforcing plate 12 via a cushioning material 11 such as urethane rubber so that large vibrations are not transmitted to the magnetic measurement device.
Further, as shown in FIG. 2, by providing a fixing plate (jig) 13 that applies a compressive force in the axial direction (arrow direction in FIG. 2) of the stator core 1 and a tightening portion 9 'such as a screw, the stator core 1 is axially moved. In an actual motor, it is possible to measure magnetic characteristics in a state where the stator core is compressed in the same axial direction as when the stator core is shrink-fitted.
図３は、本発明の磁気測定装置を用いる場合の鉄損測定回路を例示する図である。
図３において、ｆは周波数計、Ａは実効電流計、Ｖｆは磁束電圧計、Ｖは実効電圧計、Ｓ1，Ｓ2，Ｓ3は開閉器、Ｗは電力計を示す。
図３の一次コイルとして本発明の第１のコイル４を用い、二次コイルとして本発明の第２のコイル５を用い、まず、開閉器Ｓ2を閉じて、試料（ステータコア１）を交流消磁した後、開閉器Ｓ1およびＳ3を閉じ、開閉器Ｓ2を開き、磁束電圧計の読みＥｆが予め定めた磁束密度の高波値になるように電流電圧を調整する。周波数は規定の値に保つ。
磁束電圧計の読みＥｆを式（Ａ）によって求める。
Ｅｆ＝４．４４×ｆ×Ｎ2×Ｂ×Ａ・・・・（Ａ）
ここに、ｆ：周波数（Ｈｚ）
Ｎ2：二次コイルの巻数
Ｂ：磁束密度の高波値（Ｔ）
Ａ：試料の断面積（ｍ2）
次に、そのままの状態で電力計の読みＰと実効電圧計の読みＥを求め、鉄損を式（Ｂ）および式（Ｃ）によって計算することができる。
Ｗc＝Ｗ×１００／[ｈ＋（Ｅ/Ｅｆ）2×ｅ]
＝[Ｐ-（Ｅ2／Ｒ）]×１００／[ｈ＋（Ｅ/Ｅｆ）2×ｅ]・・・（Ｂ）
Ｗs＝Ｗc／ｍ1・・・（Ｃ）
ここに、Ｗc：正弦波での値に換算した鉄損（Ｗ）
Ｗ：鉄損の測定値（Ｗ）
Ｅ：二次コイル誘起電圧による実効値電圧計の読み（Ｖ）
Ｅｆ：二次コイル誘起電圧による磁束電圧計の読み（Ｖ）
ｈ、ｅ：波形が正弦波から外れる場合に用いる補正係数
Ｐ：電力計の読み（Ｗ）
Ｒ：実効値電圧計、磁束電圧計および電力計電圧コイルの合成抵抗（Ω）
Ｗｓ：１ｋｇ当たりの鉄損（Ｗ/ｋｇ）
ｍ1：試料の実効質量（ｋｇ）＝ｍｌ1／４ｌ
ｍ：試料の質量
ｌ1：実効磁路長（ｍ）＝０．９４
ｌ：試料の長さ（ｍ）
FIG. 3 is a diagram illustrating an iron loss measurement circuit when the magnetic measurement apparatus of the present invention is used.
In FIG. 3, f is a frequency meter, A is an effective ammeter, Vf is a magnetic flux voltmeter, V is an effective voltmeter, S 1 , S 2 and S 3 are switches, and W is a wattmeter.
The first coil 4 of the present invention is used as the primary coil in FIG. 3 and the second coil 5 of the present invention is used as the secondary coil. First, the switch S 2 is closed, and the sample (stator core 1) is AC demagnetized. After that, the switches S 1 and S 3 are closed, the switch S 2 is opened, and the current voltage is adjusted so that the reading Ef of the magnetic flux voltmeter becomes a high wave value of a predetermined magnetic flux density. Keep the frequency at the specified value.
The reading Ef of the magnetic flux voltmeter is obtained by equation (A).
Ef = 4.44 × f × N 2 × B × A (A)
Where f: frequency (Hz)
N 2 : Number of turns of secondary coil
B: High wave value of magnetic flux density (T)
A: Cross-sectional area of sample (m 2 )
Next, the reading P of the wattmeter and the reading E of the effective voltmeter can be obtained as they are, and the iron loss can be calculated by the equations (B) and (C).
Wc = W × 100 / [h + (E / Ef) 2 × e]
= [P- (E 2 / R)] × 100 / [h + (E / Ef) 2 × e] (B)
Ws = Wc / m 1 (C)
Where Wc: Iron loss (W) converted to a sine wave value
W: Measured value of iron loss (W)
E: Reading of effective value voltmeter by secondary coil induced voltage (V)
Ef: Reading of magnetic flux voltmeter by secondary coil induced voltage (V)
h, e: Correction coefficient used when waveform deviates from sine wave P: Reading of wattmeter (W)
R: Combined resistance of rms voltmeter, magnetic flux voltmeter and wattmeter voltage coil (Ω)
Ws: Iron loss per kg (W / kg)
m 1 : Effective mass (kg) of sample = ml 1 / 4l
m: Mass of the sample
l 1 : Effective magnetic path length (m) = 0.94
l: Length of sample (m)
１ ステータコア
２ ヨーク
３ ティース
４ 第１のコイル
５ 第２のコイル
６ 継鉄部
７ 継鉄支持部
８ バンド
９、９´ 締付け部
１０ 試料支持部
１１ 緩衝材
１２ 強板
１３ 固定板（冶具）
ｆ 周波数計
Ａ 実効電流計
Ｖｆ 磁束電圧計
Ｖ 実効電圧計
Ｓ1，Ｓ2，Ｓ3 開閉器
Ｗ 電力計
DESCRIPTION OF SYMBOLS 1 Stator core 2 Yoke 3 Teeth 4 1st coil 5 2nd coil 6 Joint part 7 Joint support part 8 Band 9, 9 'Fastening part 10 Sample support part 11 Buffer material 12 Strong board 13 Fixing plate (jig)
f Frequency meter A effective ammeter Vf flux voltmeter V effective voltage meter S 1, S 2, S 3 switch W power meter
Claims (5)
前記ステータコアの中心に設置する第１のコイルを有し、かつ、
前記第１のコイルと前記ティースとを接続して閉磁気回路を形成する継鉄部と、前記ティースに巻かれた一つ以上の第２のコイルとを有することを特徴とするステータコアの磁気測定装置。 A magnetic measuring device for a stator core comprising a yoke and teeth,
Having a first coil installed in the center of the stator core ; and
A stator core magnetic measurement comprising: a yoke portion connecting the first coil and the teeth to form a closed magnetic circuit; and one or more second coils wound around the teeth. apparatus.
前記第１のコイルを励磁コイルとし、前記第２のコイルを検出コイルとすることを特徴とするステータコアの磁気測定方法。 A magnetic measurement method using the magnetic measurement device according to any one of claims 1 to 3,
A magnetic measurement method for a stator core, wherein the first coil is an excitation coil, and the second coil is a detection coil.
前記第２のコイルの一方を励磁コイルとし、前記第２のコイルの他方を検出コイルとすることを特徴とするステータコアの磁気測定方法。 A magnetic measurement method using the magnetic measurement device according to any one of claims 1 to 3,
One of the second coils is an exciting coil, and the other one of the second coils is a detection coil.
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| US8941970B2 (en) * | 2011-10-18 | 2015-01-27 | Siemens Energy, Inc. | Method and apparatus for demagnetizing generator components prior to electromagnetic core imperfection testing or EL-CID testing |
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