JPS59191464A

JPS59191464A - Coil pattern of frequency generator

Info

Publication number: JPS59191464A
Application number: JP6580383A
Authority: JP
Inventors: Seishi Miyazaki; 清史宮崎
Original assignee: Nidec Sankyo Corp
Current assignee: Nidec Sankyo Corp
Priority date: 1983-04-14
Filing date: 1983-04-14
Publication date: 1984-10-30
Also published as: JPH0152987B2

Abstract

PURPOSE:To facilitate mass production of a frequency generator and to eliminate the influence of induction noise by providing the first and second canceling coils at all both sides of the first and second generating coils. CONSTITUTION:The first and second generating coils c'-e', b'-d' of the prescribed pitch are intruded to each other and disposed adjacently so as to planely oppose a magnet movable element in which a plurality of poles are magnetized. The first and second canceling coils e'-b', a'-d' are provided in parallel at all both sides of the first and second generating coils c'-e', b'-d'. The coils e'-b', a'-d' and c'-e', b'-d' are alternately connected in series. A closed loop of one phase is formed of the coils c'-e' and e'-b', and closed loops of 2- phases are formed by the coils b'-d'- and a'-d'.

Description

【発明の詳細な説明】本発明は例えば電動機の回転速度に比例した周ｅ数（ま
たはパルス数）の信号を得る周波数発電機のコイルパタ
ーンに関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a coil pattern for a frequency generator that obtains a signal with a frequency e (or pulse number) proportional to the rotational speed of an electric motor, for example.

一般に、周波数発電機を′電動機内に組込んで、この周
波数発電機からの周波数信号によって、速度制御を行な
わす場合、制御特性を良好にし、周囲温度による影響を
受けにくいなどのメリノ）・がある反面、周波数信号の
検出誤差は電動機の回転むらとなって現われ、多大の支
障をきたすことになる。特に、磁気変化形層波数発電方
式では電動機からの磁界及びトランスなどの外部からの
８界による磁気誘導ノイズが問題となる。In general, when a frequency generator is incorporated into a motor and speed control is performed using the frequency signal from the frequency generator, the control characteristics are good and the merino (merino), etc. On the other hand, detection errors in the frequency signal appear as uneven rotation of the motor, causing a great deal of trouble. In particular, in the magnetic variable layer wave number power generation system, magnetic induction noise due to the magnetic field from the motor and the field from outside such as a transformer poses a problem.

第１図に従来例の周波数発電機の固定子部を示す。この
場合、絶縁基板Ａ上には、発電コイル１が囲む面積に鎖
交する誘導ノイズ磁束を打消すために、該発電コイルｌ
の両端から逆方向に誘導ノイズ除去コイル２を設けてい
る。FIG. 1 shows the stator section of a conventional frequency generator. In this case, on the insulating substrate A, in order to cancel the induced noise magnetic flux interlinking with the area surrounded by the generating coil 1, the generating coil l
Inductive noise removal coils 2 are provided in opposite directions from both ends of the coil.

しかし、このような構成でも発電コイル１と誘導ノイズ
除去コイル２とで囲まれる面積に鎖交する誘導ノイズ磁
束を打消すことができない。その結果、周波数信号の発
生電圧が少ない場合、上記の誘導ノイズ磁束による誘導
ノイズ電圧は電動機の回転精度に悪影響を及ぼすことに
なる。However, even with such a configuration, the induced noise magnetic flux interlinking with the area surrounded by the power generation coil 1 and the induced noise removal coil 2 cannot be canceled. As a result, if the generated voltage of the frequency signal is small, the induced noise voltage due to the above-mentioned induced noise magnetic flux will have a negative effect on the rotation accuracy of the motor.

この欠点を除くべく、第３図に示すレイアウトが提案さ
れている。この例では、発電コイル３によって囲まれる
面積に鎖交する誘導ノイス研束を打消すために、第１誘
導ノイズ除去コイル４、第２誘導ノイズ除去コイル５を
設け、さらに発電コイル３と、この発電コイル３の外周
部に設ける第１誘導ノイス除去コイル４とで囲−１：ｆ
Ｌる面積に鎖交する誘導ノイズ磁束と、発電コイル３と
、この発電コイル３の内周部に設ける第２誘導ノイス除
去コイル５とで囲まれる面積に鎖交する誘導ノイズ磁束
とが打消し合うように第１誘導ノイス除去コイル４、発
電コイル３、第２誘導ノイズ除去コイル５をこれらの順
に直列接続している。In order to eliminate this drawback, a layout shown in FIG. 3 has been proposed. In this example, a first induction noise removal coil 4 and a second induction noise removal coil 5 are provided in order to cancel the induced noise flux linked to the area surrounded by the generation coil 3. -1: f
The induced noise magnetic flux interlinking with the area L is canceled by the induced noise magnetic flux interlinking with the area surrounded by the power generation coil 3 and the second induction noise removal coil 5 provided on the inner circumference of the power generation coil 3. The first inductive noise removing coil 4, the power generation coil 3, and the second inductive noise removing coil 5 are connected in series in this order so as to match each other.

すなわち、この例では、１つの円を２分し、１８０Ｑず
つ位相の異なる検出電圧を逆相に接続して位相を検出し
、コイル面の全面を通過する磁界の変化に対してこれを
キャンセルする方式を採っている。しかし、この例にお
いても、発電コイル３に対向する発電ロータに回転中上
・或いは同心円から磁気的にずれた磁路が形成された場
合には、キャンセル用のコイルが１８００毎に分割され
ているので、１回転に１回の検出むらとなり、エラー成
分が生じ易いという問題がある。In other words, in this example, one circle is divided into two, detection voltages with different phases of 180Q are connected in opposite phases to detect the phase, and this is canceled against changes in the magnetic field passing over the entire surface of the coil. method is adopted. However, even in this example, if a magnetic path is formed in the generating rotor facing the generating coil 3 during rotation or magnetically deviating from the concentric circle, the canceling coil is divided into 1800 pieces. Therefore, there is a problem that detection unevenness occurs once per rotation, and error components are likely to occur.

本発明は、これら従来技術における欠点や問題点に着目
してなされたもので、発電コイル全体を通過する磁界の
変化に対してもキャンセルする効果をもち、且つ、１回
転に１回のエラー成分も出にくい構成の周波数発電機を
提供することを目的とする。The present invention has been made by focusing on these drawbacks and problems in the conventional technology, and has the effect of canceling changes in the magnetic field passing through the entire generating coil, and also eliminates the error component once per rotation. The purpose of the present invention is to provide a frequency generator with a configuration that makes it difficult to generate.

本発明の構成音、以下、一実施例に基づいて説明する。The constituent sounds of the present invention will be explained below based on one embodiment.

第３図は本発明の原理的な構成を示しており、このコイ
ルパターンでは、発電機用ロータマグネ７トの袷数はい
くつであっても適用できる。なお、図中、仮想線領域の
Ｎ、Ｓ表示はマグネ、ト移動子の磁極を示す。又、符号
６て示す区間は、１回転エンコーダの場合は３６００を
、リニアスケール物ではスタート点７からエンド点８ま
でに対応する。FIG. 3 shows the basic configuration of the present invention, and this coil pattern can be applied to any number of generator rotor magnets. In the figure, N and S in the virtual line area indicate the magnetic poles of the magnet and slider. Further, the section indicated by reference numeral 6 corresponds to 3600 in the case of a one-rotation encoder, and corresponds to from the start point 7 to the end point 8 in the case of a linear scale encoder.

このコイルパターンはａ部からｂ部までと、１〕部から
Ｃ部までの２つのブロックから成り、これら各々のルー
プは逆方向のループとして形成され且つ、直列に接続さ
れている。This coil pattern consists of two blocks, from part a to part b and from part 1 to part C, and each of these blocks is formed as a loop in the opposite direction and connected in series.

又、ａ部からｂ部に至るループで囲まれる面積と、ｂ部
からＣ部に至るループで囲まれる面積をほぼ等しく設定
するとともに、ａ部からｂ部に至るコイル区間及びＣ部
からｂ部に至るコイル区間をほぼ、区間６若しくはスタ
ート点７からエンド点８までの区間に対応させである。In addition, the area surrounded by the loop from part a to part b and the area surrounded by the loop from part b to part C are set to be approximately equal, and the coil section from part a to b and from part C to b are set to be approximately equal. The coil section extending from the start point 7 to the end point 8 approximately corresponds to the section 6 or the section from the start point 7 to the end point 8.

図において、Ｃ部からｅ部までの区間を第１の発電コイ
ル、１）部からｄ部までの区間を第２の発電コイル、ｅ
部からｂ部までの区間を第１のキャンセルコイル、ａ部
からｄ部までの区間を第２のキャンセルコイルとすれば
、第１、第２の各発電コイルは後述のマグネ、ト移動子
たる周波数発電機Ｊ１」ロータ１１（第５図参ｒ＠）に
面対向してこの＼ロータＪ１の磁極（Ｎ、Ｓ）間隔とほ
ぼ等しいビ、チの矩形状に形成されている。In the figure, the section from section C to section e is the first generating coil, the section from section 1) to section d is the second generating coil, and the section from section 1) to section d is the second generating coil.
If the section from part to b is the first canceling coil, and the section from a to d is the second canceling coil, each of the first and second generating coils serves as a magnet and a mover, which will be described later. Frequency generator J1" is formed in a rectangular shape with a gap approximately equal to the spacing between the magnetic poles (N, S) of the rotor J1, facing the rotor 11 (see FIG. 5).

そして、これら両発電コイルはクランク状に曲折して互
いに入り通覧せて形成されており、２本が近接した平行
勝として配置されている。ぜた、これら両発電コイルの
全域の両側には、第１及び第２のキャンセルコイルが各
１本すっ並設さｎており、第１の発電コイル→第１のキ
ャンセルコイル→第２の発電コイル→第２のキャンセル
コイルというように交互に直列接続さｎ、でいる。Both of these power generation coils are bent into a crank shape so that they can be seen through each other, and the two are arranged close to each other in parallel. Furthermore, on both sides of the entire area of both of these generating coils, one each of the first and second canceling coils are installed in parallel. The coils are alternately connected in series, such as the coil → the second canceling coil.

こノ結果、第１の発電コイルと第１のキャンセルコイル
とにより１相分の閉ループが形成され、第２の発電コイ
ルと第２のキャンセルコイルとにより２相分の閉ループ
が形成され、且つ、両開ループは互いに逆相（電気的に
１８０°の位相差）に形成される。As a result, a closed loop for one phase is formed by the first generating coil and the first canceling coil, a closed loop for two phases is formed by the second generating coil and the second canceling coil, and, Both open loops are formed in opposite phases (electrical phase difference of 180°).

そして、これら第１及び第２の各発電コイルからは、周
知の発電原理に従い、多極着磁さｎた発電機用ロータの
磁極による交番磁界が矩形波状の発電コイルの発電作用
導体部分を横切るごとに発電を行なう。このとき、第１
及び第２σ）各発電コイルの２本が近接している平行線
であり且つ、直列に接続されているので、これらの発電
コイルからは従来例のものと比較して２倍の発電電圧が
得ら九る。From each of the first and second power generation coils, an alternating magnetic field generated by the magnetic poles of the multi-pole magnetized generator rotor crosses the power generation conductor portion of the rectangular waveform power generation coil, in accordance with the well-known power generation principle. Generate electricity every time. At this time, the first
and 2nd σ) Since the two of each generating coil are parallel lines that are close to each other and connected in series, twice the generated voltage can be obtained from these generating coils compared to the conventional example. Ra nine.

図の構成部分に、発電機用ロータ以外の外部から誘導ノ
イズ磁束が鎖交した場合は、上記１相分の閉ループと上
記２相分の閉ループの面積が等しく且つ、互いに逆相で
あるので互いに打消し合う様に作用する。従って、例え
、誘導ノイズ磁束が部分的にむらを生じたとしても全域
にゎたり同面積であるので、これに起因して検出むらを
生ずることはない。If induced noise magnetic flux is linked to the component shown in the figure from outside other than the generator rotor, the areas of the closed loop for one phase and the closed loop for two phases are equal and opposite to each other, so they are mutually connected. They act to cancel each other out. Therefore, even if the induced noise magnetic flux is uneven in some areas, the area is the same over the whole area, and this will not cause detection unevenness.

なお、上記第１、第２の各発電コイル及び第１、第２の
各キャンセルコイルは、絶縁基板の片面にプリント配線
技術で形成される。Note that the first and second power generation coils and the first and second cancellation coils are formed on one side of the insulating substrate by printed wiring technology.

父、磁性鉄板に絶縁層を設け、この絶縁層の表面に両コ
イルを形成してもよく、この場合はロータとの間に磁気
的閉ループが形成され、効率が一層向上する。Alternatively, an insulating layer may be provided on the magnetic iron plate, and both coils may be formed on the surface of this insulating layer. In this case, a magnetic closed loop is formed with the rotor, further improving efficiency.

第３図に示す構成を絶縁基板たる円板８上に形成したの
が第４図に示す例である。The example shown in FIG. 4 is an example in which the structure shown in FIG. 3 is formed on a disk 8, which is an insulating substrate.

第４図における符号ａ／、　　ｈｌ、　　ｃ／、　　ｄ
ｌ、　　ｅ／は第３図における符号ａ、ｂ、ｃ、ｄ、ｅ
に各々対応する。Symbols a/, hl, c/, d in Figure 4
l, e/ are the symbols a, b, c, d, e in Figure 3.
correspond to each.

そしてさらに、この第４図に示す構成をブラシレスモー
タに適用したのが第５図に示す例である。Furthermore, the example shown in FIG. 5 is an example in which the configuration shown in FIG. 4 is applied to a brushless motor.

本発明に係るコイルパターンを形成された円板８は、基
板９に固定されたホルダー１０に装着されており、その
対向部には周波数発電機用ロータ１１が位置している。A disk 8 on which a coil pattern according to the present invention is formed is attached to a holder 10 fixed to a substrate 9, and a frequency generator rotor 11 is positioned opposite to the holder 10.

当該ブラシレスモータの基本構成は周知であるので以下
、各部材名称を列記すれば次の通りである。Since the basic configuration of the brushless motor is well known, the names of each component will be listed below.

符号１２は軸受、符号１３は回転軸、符号１４はボス、
符号１５はロータヨーク、符号１６はロータマグネット
、符号１７はステータコア、符号１８は駆動コイルを各
々示す。12 is a bearing, 13 is a rotating shaft, 14 is a boss,
15 is a rotor yoke, 16 is a rotor magnet, 17 is a stator core, and 18 is a drive coil.

本発明によれば、既に述べた効果の他にコイルパターン
が片面に形成さ几るので、量産しやすく、高性能なエン
コーダを安価に且つ高い信頼性で製造することが可能で
ある。According to the present invention, in addition to the above-mentioned effects, since the coil pattern is formed on one side, it is easy to mass-produce and it is possible to manufacture a high-performance encoder at low cost and with high reliability.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図、第２図は各々従来技術に係る周波数発電機の固
定子部の正面図、第３図は本発明に係る周波数発電機の
固定子部の原理的な説明図、第４図は本発明の一実施例
として円板上に形成した周波数発電機の固定子部の正面
図、第５図は同上図の固定子部を［史用したブラシレス
モータの断面図である。１１・・・（マグネット移動子としての）周波数発電機
用ロータ、Ｃ部〜Ｃ部　ｃ　／部〜ｅ′部・・・第１の
充電コイノペ　Ｉ）部〜ｄ部　ｂ／部〜ｄ′部・・・第
２の発電コイル、Ｃ部〜１〕部　ｅ／部〜ｂ′部・・・
第１のキャンセルコイル、ａ部〜ｄ部　ａ／部〜ｄ′部
・・・第２のキャンセルコイル。・（、し・ ■４医 τ１呪1 and 2 are front views of a stator section of a frequency generator according to the prior art, FIG. 3 is a principle explanatory diagram of a stator section of a frequency generator according to the present invention, and FIG. 4 is a front view of a stator section of a frequency generator according to the prior art. FIG. 5 is a front view of a stator section of a frequency generator formed on a disk as an embodiment of the present invention, and FIG. 5 is a sectional view of a brushless motor using the stator section of the same figure. 11... Rotor for frequency generator (as a magnet mover), C part to C part c/part to e' part... First charging Koinope I) part to d part b/ part to d' part ...Second power generation coil, C part to 1] part e/part to b' part...
First cancellation coil, a section to d section a/section to d' section...Second cancellation coil.・(、し・ ■4 doctor τ1 curse

Claims

【特許請求の範囲】複数の磁極が着磁さ扛たマグネット移動子に面対向して
所定ビ、チの第１及び第２の発電コイルを互いに入り込
ませて近接配置すると共に、こｆらの第１及び第２の各
発電コイルの全域両側に第１　及ヒ第２のキャンセルコ
イルれらの第１及び第２の各キャンセルコイル第１及び第２
の発電コイルとを交互に直列接続したことを特徴とする
周波数発電機のコイル／ぐターン。[Scope of Claims] The first and second power generation coils of predetermined widths and widths are disposed in close proximity to each other so as to face each other face-to-face with a magnet mover in which a plurality of magnetic poles are magnetized. The first and second canceling coils are located on both sides of the entire area of each of the first and second generating coils.
A coil/g-turn of a frequency generator characterized by alternately connecting a generator coil in series.