JP3470372B2 - Sheet coil - Google Patents
Sheet coilInfo
- Publication number
- JP3470372B2 JP3470372B2 JP01778594A JP1778594A JP3470372B2 JP 3470372 B2 JP3470372 B2 JP 3470372B2 JP 01778594 A JP01778594 A JP 01778594A JP 1778594 A JP1778594 A JP 1778594A JP 3470372 B2 JP3470372 B2 JP 3470372B2
- Authority
- JP
- Japan
- Prior art keywords
- coil
- pattern
- pitch
- coils
- spiral
- 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.)
- Expired - Fee Related
Links
Landscapes
- Transmission And Conversion Of Sensor Element Output (AREA)
- Coils Or Transformers For Communication (AREA)
- Windings For Motors And Generators (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、例えば、回転体の回転
位置検出用のレゾルバの励磁コイルおよび検出コイルに
関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an exciting coil and a detecting coil of a resolver for detecting a rotational position of a rotating body, for example.
【０００２】[0002]
【従来の技術】従来、接着剤の絶縁薄層を挟んで、その
両面に金属の導体からなる平面状の等間隔ピッチの渦巻
コイルが対向して形成され、これら両コイルはコイルの
内側接続端子同士がスルーホールにより互いに電気的に
接続されたシートコイルがある（例えば、特公昭６１ー
５６７００号公報）。また、磁束の空間分布を正弦波に
近似するため、スロットに配設するコイルの巻数比を、
電気角に対応させて、変化させたものがある（例えば、
特開昭６１−５１５１５号公報）。2. Description of the Related Art Conventionally, a flat spiral coil made of a metal conductor is formed on both sides of an insulating thin layer of an adhesive so as to face each other. There is a sheet coil which is electrically connected to each other through a through hole (for example, Japanese Patent Publication No. 61-56700). Also, in order to approximate the spatial distribution of the magnetic flux to a sine wave, the turns ratio of the coil arranged in the slot is
Some have been changed according to the electrical angle (for example,
JP-A-61-51515).
【０００３】[0003]
【発明が解決しようとする課題】ところが、前者を、例
えば、１相励磁・２相検出のアキシャルギャップ・レゾ
ルバの励磁および検出コイルとして用いた場合、金属の
導体からなるコイルのパターンピッチ幅が等間隔である
ので、励磁コイルに正弦波形の電流ｉ（ｉ＝Ｉ×ｓｉｎ
( ωｔ) ）を印加すると、電気角で９０度位相のずれた
２つの検出コイル（α相、β相）にはそれぞれ、起磁力
波形を時間で微分した値の電圧Ｖα、Ｖβが誘起され
る。起磁力波形が三角波形もしくは台形波形となるた
め、検出コイルに誘起される電圧Ｖα、Ｖβに高調波が
乗り、正弦波形からずれ、検出精度の低下原因の一つに
なる。後者は、スロット内の巻数比を変化するようにし
てあり、シートコイルに適用すると、巻数比の多い所と
少ない所でシートに凹凸が生じ空隙を大きくする必要が
生じ、検出精度を損なうという問題を生じる。そこで、
本発明は、シートコイルのコイルパターンを改良するこ
とにより、起磁力波形に高調波が乗るのを防ぎ、空間磁
束を正弦波に近似し、検出精度を向上することを目的と
する。However, when the former is used, for example, as an excitation and detection coil of an axial gap resolver for one-phase excitation / two-phase detection, the pattern pitch width of the coil made of a metal conductor is Since it is the interval, the sine-wave current i (i = I × sin) is applied to the exciting coil.
(ωt)) is applied, two voltages Vα and Vβ, which are values obtained by differentiating the magnetomotive force waveform with respect to time, are induced in two detection coils (α phase and β phase) that are 90 degrees out of phase with each other in electrical angle. . Since the magnetomotive force waveform is a triangular waveform or a trapezoidal waveform, harmonics are added to the voltages Vα and Vβ induced in the detection coil and deviate from the sine waveform, which is one of the causes of deterioration in detection accuracy. The latter is designed to change the turn ratio in the slot, and when applied to the sheet coil, it causes the unevenness of the sheet at the places where the turn ratio is large and where it is small, and it is necessary to enlarge the gap, which impairs the detection accuracy. Cause Therefore,
An object of the present invention is to improve the coil pattern of the sheet coil to prevent harmonics from being superimposed on the magnetomotive force waveform, approximate the spatial magnetic flux to a sine wave, and improve the detection accuracy.
【０００４】[0004]
【課題を解決するための手段】上記問題を解決するため
に、本発明は、薄厚の絶縁基板（１）を挟んで、その両
面に金属の導体からなる平面状の複数のうず巻コイル
（２Ｕ１，２Ｕ２，２Ｌ１，２Ｌ２・・）を直線上に等
極ピッチで配列し、表面側コイル（２Ｕ１，２Ｕ２・
・）と裏面側コイル（２Ｌ１，２Ｌ２・・）が互いに重
なるように対向して形成され、表・裏コイルはコイルの
内側端接続端子（２Ｕｉ，２Ｌｉ）同士がスルーホール
を介して電気的に直列に接続されてなるシートコイルに
おいて、前記うず巻状コイルの配列と直交方向のパター
ンピッチを配列方向のパターンピッチに比べ十分小さく
し、極ピッチをτ、半極ピッチ（τ／２）内の表面側ま
たは裏面側の配列方向に並列に並ぶパターンの導体総数
をｎ、ｊをうず巻中心から外側に向かう１からｎまでの
整数としたとき、うず巻状コイルの配列方向のパターン
ピッチＰj を、
Ｐj ＝τ＊（ｓｉｎ-1（１−（ｊ−１）／ｎ）ーｓｉｎ
-1（１−ｊ）／ｎ））／π
となるように不等ピッチに配置する。In order to solve the above problems, the present invention has a plurality of flat spiral coils (2U1) made of metal conductors on both sides of a thin insulating substrate (1). , 2U2, 2L1, 2L2 ··· are arranged on a straight line at an equal pole pitch, and front side coils (2U1, 2U2 · ·
.) And the back side coils (2L1, 2L2 ...) Are formed to face each other so as to overlap each other, and the front and back coils are electrically connected to each other through the through holes between the coil inner end connection terminals (2Ui, 2Li). In the sheet coils connected in series, the pattern pitch in the direction orthogonal to the arrangement of the spiral coil is made sufficiently smaller than the pattern pitch in the arrangement direction, and the pole pitch is within τ and within the half pole pitch (τ / 2). When the total number of conductors of the patterns arranged in parallel in the arrangement direction on the front surface side or the back surface side is n and j are integers from 1 to n outward from the center of the spiral winding, the pattern pitch P j in the arrangement direction of the spiral coil is shown. P j = τ * (sin -1 (1- (j-1) / n) -sin
-1 (1-j) / n)) / π are arranged at unequal pitches.
【０００５】[0005]
【作用】こうすることにより、コイルパターンが作る起
磁力波形を正弦波形にすることができ、励磁および検出
コイルに、高調波を含まない正弦波に近似した電圧が誘
起される。また、うず巻状コイルパターンの内側のパタ
ーンの電気抵抗と電流密度が低下するので、発生するロ
スが低減する。By doing so, the magnetomotive force waveform created by the coil pattern can be made sinusoidal, and a voltage approximate to a sinusoidal wave containing no harmonics is induced in the excitation and detection coils. Further, since the electric resistance and the current density of the pattern inside the spiral coil pattern are lowered, the generated loss is reduced.
【０００６】[0006]
【実施例】以下、本発明の実施例を図面に基づいて説明
する。図１（ａ）は本発明の実施例を示すコイルシート
の１極対分のパターンの平面図であり、（ｂ）は図１の
Ａ−Ａ’における側断面図を示す。説明の便宜上、表面
側パターンと裏面側パターンは対称であるので、表面側
パターンのみを示してある。コイルパターンは、絶縁基
板１の両面に貼付された薄厚の銅箔などの良電導体をエ
ッチングにより形成した、例えば、幅５０ミクロンから
２００ミクロンの細幅で同一寸法・同一形状のうず巻状
表面側コイルパターン２Ｕ１、２Ｕ２と裏面側コイルパ
ターン２Ｌ１、２Ｌ２を、表面側コイルパターン２Ｕ１
と裏面側コイルパターン２Ｌ１および表面側コイルパタ
ーン２Ｕ２と裏面側コイルパターン２Ｌ２を絶縁基板１
を挟んで、表面側のうず巻状のコイルパターン２Ｕ１と
２Ｕ２と裏面側のうず巻状のコイルパターン２Ｌ１をう
ず巻の巻方向が逆になるよう、重ね合わせ、起磁力の向
きが重畳するように、直線上に配列して１極対を構成す
る。表・裏のコイルパターン２Ｕ１と２Ｌ１および２Ｕ
２と２Ｌ２は、極中心近傍に設けた内側接続端子２Ｕ
ｉ、２Ｌｉ同士でスルーホール３により電気的に接続さ
れている。こうすることにより、うず巻状のコイルパタ
ーン２Ｕ１と２Ｌ１、２Ｕ２と２Ｌ２は、電気的に直列
に接続されることになる。両コイルの外側端部には、外
側接続端子２１ｉ、２１ｏ、２２ｉ、２２ｏを設けてあ
る。外側接続端子２１ｏと２２ｉはリード線Ｌにより接
続してあり、外側接続端子２１ｉと２２ｏは、電源に接
続してある。表面側コイルパターン２Ｕ１は、配列方向
にピッチの異なるコイル辺２Ｕ１1、２Ｕ１n からな
る。コイルパターン２Ｕ２、２Ｌ１および２Ｌ２はコイ
ルパターン２Ｕ１と同一寸法・同一形状なので、以下コ
イルパターン２Ｕ１について説明する。表面側コイル辺
２Ｕ１1 から２Ｕ１n の配列方向と直交する方向のパタ
ーンピッチは、配列方向のパターンピッチに比べ、十分
小さくしてあり、幅はほぼ等しくしてある。うず巻状の
コイル辺２Ｕ１1 から２Ｕ１n の配列方向のコイルピッ
チＰj は、コイルパターンの作る起磁力波形が正弦波形
なるように、極ピッチをτ、半極ピッチ（τ／２）内の
表面側または裏面側の配列方向のパターンの導体総数を
ｎ、ｊをうず巻の中心から外側に向かって付した導体番
号を示す１からｎまでの整数としたとき、
Ｐj ＝τ＊（ｓｉｎ-1（１−（ｊ−１）／ｎ）ーｓｉｎ
-1（１−ｊ）／ｎ））／π
となるようしてある。すなはち、うず巻の中心から外側
に向かって不等ピッチのコイルパターンが形成される。
ここで、ｊ番目のパターンピッチＰj に対する配列方向
の導体幅Ｗj は、起磁力波形を滑らかにするため、最小
の絶縁距離δを確保できる範囲で、できるだけ大きくと
ってある。外側端接続端子２１ｉと２２ｏとの間に正弦
波の電流を印加すると、コイルパターン２Ｕ１と２Ｌ１
の作る起磁力と、コイルパターン２Ｕ２と２Ｌ２の作る
起磁力とは逆極となり、１極対が形成される。極内の磁
束分布は、図２に示すように、コイル辺２Ｕ１1 の作る
磁束に、コイル辺２Ｕ１2 からコイル辺２Ｕ１n の作る
磁束が順次重畳し、合成磁束の波形は正弦波に近いもの
になる。上記のように構成したシートコイルを、そのま
ま直線上に連続して形成し励磁コイルとし、１極対分を
対向させ検出コイルにすると、リニアタイプ・レゾルバ
を構成できる。また、上記のように構成したシートコイ
ル１極対を電気角で１８０°の位相をもたせて、円筒上
に貼付し励磁コイルとし、２極対を電気角で９０°の位
相を持たせて対向させ円筒上に貼付し検出コイルにする
と、１相励磁・２相検出のラジアルタイプ・レゾルバを
構成できる。なお、本発明のシートコイルの好ましい適
用としてレゾルバを上げてあるが、適用はレゾルバに限
られず、回転トランスやモータにも適する。Embodiments of the present invention will be described below with reference to the drawings. 1A is a plan view of a pattern for one pole pair of a coil sheet showing an embodiment of the present invention, and FIG. 1B is a side sectional view taken along the line AA ′ in FIG. For convenience of explanation, since the front surface side pattern and the back surface side pattern are symmetrical, only the front surface side pattern is shown. The coil pattern is formed by etching a good electric conductor such as a thin copper foil attached to both surfaces of the insulating substrate 1. For example, a spiral surface having the same size and the same shape with a narrow width of 50 to 200 microns. The side coil patterns 2U1 and 2U2 and the back side coil patterns 2L1 and 2L2 are connected to the front side coil pattern 2U1.
The back side coil pattern 2L1 and the front side coil pattern 2U2 and the back side coil pattern 2L2 are insulated substrate 1
The coil patterns 2U1 and 2U2 having a spiral shape on the front side and the coil pattern 2L1 having a spiral shape on the back side are overlapped with each other so that the winding directions of the spirals are opposite to each other, and the directions of the magnetomotive forces are superimposed. Then, they are arranged on a straight line to form one pole pair. Front and back coil patterns 2U1 and 2L1 and 2U
2 and 2L2 are inner connection terminals 2U provided near the pole center
i and 2Li are electrically connected to each other through the through hole 3. By doing so, the spiral coil patterns 2U1 and 2L1, 2U2 and 2L2 are electrically connected in series. Outer connection terminals 21i, 21o, 22i, 22o are provided at the outer ends of both coils. The outer connecting terminals 21o and 22i are connected by a lead wire L, and the outer connecting terminals 21i and 22o are connected to a power source. The front side coil pattern 2U1 is composed of coil sides 2U1 1 and 2U1 n having different pitches in the arrangement direction. Since the coil patterns 2U2, 2L1 and 2L2 have the same size and shape as the coil pattern 2U1, the coil pattern 2U1 will be described below. The pattern pitch in the direction orthogonal to the array direction of the front side coil sides 2U1 1 to 2U1 n is sufficiently smaller than the pattern pitch in the array direction, and the widths thereof are substantially equal. The coil pitch P j in the arrangement direction of the spiral-shaped coil sides 2U1 1 to 2U1 n is such that the pole pitch is τ and the half pole pitch (τ / 2) is within a range so that the magnetomotive force waveform formed by the coil pattern is a sine waveform. When the total number of conductors of the pattern in the arrangement direction on the front surface side or the back surface side is n and j are integers from 1 to n indicating the conductor numbers given from the center of the spiral to the outside, P j = τ * (sin -1 (1- (j-1) / n) -sin
-1 (1-j) / n)) / π. That is, a coil pattern of unequal pitch is formed from the center of the spiral to the outside.
Here, the conductor width W j in the arrangement direction with respect to the j-th pattern pitch P j is set as large as possible within the range in which the minimum insulation distance δ can be secured in order to smooth the magnetomotive force waveform. When a sinusoidal current is applied between the outer end connection terminals 21i and 22o, the coil patterns 2U1 and 2L1 are applied.
And the magnetomotive force created by the coil patterns 2U2 and 2L2 have opposite polarities to form one pole pair. Magnetic flux distribution in-electrode, as shown in FIG. 2, the magnetic flux produced by the coil side 2U1 1, magnetic flux is sequentially superimposed to make the coil sides 2U1 2 of the coil sides 2U1 n, waveform synthesis flux close to a sine wave become. A linear type resolver can be constructed by continuously forming the sheet coil constructed as described above on a straight line as it is and using it as an exciting coil so that one pole pair faces each other to form a detecting coil. In addition, the sheet coil 1 pole pair configured as described above has an electrical angle of 180 ° and is stuck on a cylinder to form an exciting coil, and the 2 pole pairs face each other with an electrical angle of 90 °. Then, by attaching it on a cylinder to form a detection coil, a radial type resolver for one-phase excitation / two-phase detection can be constructed. Although the resolver is cited as a preferable application of the sheet coil of the present invention, the application is not limited to the resolver, and it is also suitable for a rotary transformer and a motor.
【０００７】[0007]
【発明の効果】以上述べたように、本発明によれば、配
列方向のパターンピッチを変えることにより、コイルパ
ターンの作る合成起磁力波形が正弦波形に近いものにな
るので、起磁力波形に高調波が乗ることがない。例え
ば、このシートコイルを１相励磁・２相検出のアキシャ
ルギャップ・レゾルバの励磁および検出コイルとして用
いた場合、励磁コイルに正弦波形の電流ｉ（ｉ＝Ｉ×ｓ
ｉｎ( ωｔ) ）を印加すると、電気角で９０度位相のず
れた２つの検出コイル（α相、β相）に誘起される電圧
は理想的な正弦波形となり、検出精度の向上することが
できる。モータ等に適用すれば、トルクリップル等が防
止できる。As described above, according to the present invention, by changing the pattern pitch in the arrangement direction, the combined magnetomotive force waveform produced by the coil pattern becomes close to a sine waveform, so that the magnetomotive force waveform has a higher harmonic. The waves never ride. For example, when this sheet coil is used as an excitation and detection coil for an axial gap resolver for one-phase excitation / two-phase detection, a sinusoidal current i (i = I × s) is applied to the excitation coil.
When in (ωt)) is applied, the voltages induced in the two detection coils (α-phase and β-phase), which are 90 degrees out of phase with each other in electrical angle, have an ideal sine waveform, and the detection accuracy can be improved. . If applied to a motor or the like, torque ripple and the like can be prevented.
【図１】 （ａ）本発明の実施例を示すシートコイルの
１極対分のパターンの平面図。（ｂ）図１（ａ）のＡ−
Ａ’におけるパターンの断面図。FIG. 1A is a plan view of a pattern for one pole pair of a sheet coil showing an embodiment of the present invention. (B) A- in FIG.
Sectional drawing of the pattern in A '.
【図２】本発明の実施例におけるコイルパターンの起磁
力波形を示すグラフ。FIG. 2 is a graph showing a magnetomotive force waveform of a coil pattern in the example of the present invention.
１ 絶縁基板 ２Ｕ１、２Ｕ２ 表面側のコイルパターン ２Ｕ１1 ・・・２Ｕ１n コイル辺 ２Ｌ１、２Ｌ２ 裏面側のコイルパターン ２Ｕｉ、２Ｌｉ 内側接続端子 ２１ｉ、２１ｏ、２２ｉ、２２ｏ 外側接続端子1 Insulating substrate 2U1, 2U2 Front side coil pattern 2U1 1 ... 2U1 n Coil side 2L1, 2L2 Back side coil pattern 2Ui, 2Li Inner connecting terminals 21i, 21o, 22i, 22o Outer connecting terminals
フロントページの続き (58)調査した分野(Int.Cl.7，ＤＢ名) H01F 5/00 G01D 5/245 101 H01F 17/00 H02K 3/04 H01F 21 H01F 27 H01F 30 H01F 38 Front page continuation (58) Fields surveyed (Int.Cl. 7 , DB name) H01F 5/00 G01D 5/245 101 H01F 17/00 H02K 3/04 H01F 21 H01F 27 H01F 30 H01F 38
Claims (2)
属の導体からなる平面状の複数のうず巻状コイルを直線
上に等極ピッチで配列し、表面側コイルと裏面側コイル
が互いに重なるように対向して形成され、表・裏コイル
はコイルの内側端接続端子同士がスルーホールを介して
電気的に直列に接続されているシートコイルにおいて、 前記うず巻状コイルの配列方向のパターンピッチＰ
jを、極ピッチをτ、半極ピッチ（τ／２）内の表面側
または裏面側の周方向に並列に並ぶパターンの導体総数
をｎ、ｊをうず巻中心から外側に向かって付した導体番
号を示す１からｎまでの整数としたとき、 Ｐj＝τ＊（ｓｉｎ-1（１−（ｊ−１）／ｎ）−ｓｉｎ
-1（１−ｊ）／ｎ））／π となるように不等ピッチにし、各パターンピッチＰj に
おけるコイルの幅を、最小絶縁距離を確保できる範囲
で、大きくしたことを特徴とするシートコイル。1. A thin insulating substrate is sandwiched, and a plurality of flat spiral-shaped coils made of a metal conductor are arrayed on both sides of the substrate in a straight line at an equal pole pitch, and the front side coil and the back side coil are mutually arranged. In the sheet coil in which the front and back coils are formed to face each other so as to overlap with each other, the inner end connection terminals of the coils are electrically connected in series through through holes, and a pattern in the arrangement direction of the spiral coil is provided. Pitch P
j is the pole pitch, and n is the total number of conductors in a pattern arranged in parallel in the circumferential direction on the front surface side or the back surface side within the half pole pitch (τ / 2). when an integer from 1 showing a number up to n, P j = τ * ( sin -1 (1- (j-1) / n) -sin
-1 (1-j) / n)) / π and unequal pitches, and the width of the coil at each pattern pitch Pj is increased within a range in which a minimum insulation distance can be secured. .
パターンピッチを配列方向のパターンピッチに比べ小さ
くした請求項１記載のシートコイル。2. The sheet coil according to claim 1, wherein the pattern pitch in the direction orthogonal to the arrangement of the spiral coils is smaller than the pattern pitch in the arrangement direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP01778594A JP3470372B2 (en) | 1994-01-17 | 1994-01-17 | Sheet coil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP01778594A JP3470372B2 (en) | 1994-01-17 | 1994-01-17 | Sheet coil |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07211537A JPH07211537A (en) | 1995-08-11 |
| JP3470372B2 true JP3470372B2 (en) | 2003-11-25 |
Family
ID=11953376
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP01778594A Expired - Fee Related JP3470372B2 (en) | 1994-01-17 | 1994-01-17 | Sheet coil |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3470372B2 (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4602749B2 (en) | 2004-12-10 | 2010-12-22 | ミネベア株式会社 | Flat type resolver |
| JP5091905B2 (en) * | 2008-11-06 | 2012-12-05 | 愛三工業株式会社 | Motor structure with resolver |
| JP4997214B2 (en) * | 2008-11-19 | 2012-08-08 | 愛三工業株式会社 | Resolver |
| US8269487B2 (en) | 2008-11-11 | 2012-09-18 | Aisan Kogyo Kabushiki Kaisha | Sheet coil type resolver |
| JP4997213B2 (en) * | 2008-11-11 | 2012-08-08 | 愛三工業株式会社 | Resolver |
| JP4997216B2 (en) * | 2008-11-25 | 2012-08-08 | 愛三工業株式会社 | Resolver |
| US8310228B2 (en) | 2008-11-12 | 2012-11-13 | Aisan Kogyo Kabushiki Kaisha | Resolver |
| US20120249107A1 (en) * | 2011-04-01 | 2012-10-04 | Cowley Nicholas P | Coupled inductor to facilitate integrated power delivery |
| JP6652273B2 (en) * | 2015-03-13 | 2020-02-19 | 住友電工プリントサーキット株式会社 | Planar coil element and method for manufacturing planar coil element |
-
1994
- 1994-01-17 JP JP01778594A patent/JP3470372B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07211537A (en) | 1995-08-11 |
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