JPS6259245B2 - - Google Patents
Info
- Publication number
- JPS6259245B2 JPS6259245B2 JP57104906A JP10490682A JPS6259245B2 JP S6259245 B2 JPS6259245 B2 JP S6259245B2 JP 57104906 A JP57104906 A JP 57104906A JP 10490682 A JP10490682 A JP 10490682A JP S6259245 B2 JPS6259245 B2 JP S6259245B2
- Authority
- JP
- Japan
- Prior art keywords
- slit
- metal
- metal disk
- disk
- cord
- 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
Links
- 229910052751 metal Inorganic materials 0.000 claims description 64
- 239000002184 metal Substances 0.000 claims description 64
- 239000011347 resin Substances 0.000 claims description 3
- 229920005989 resin Polymers 0.000 claims description 3
- 238000001514 detection method Methods 0.000 description 3
- 238000005530 etching Methods 0.000 description 3
- 230000003287 optical effect Effects 0.000 description 3
- 239000011521 glass Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/26—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light
- G01D5/32—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light
- G01D5/34—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells
- G01D5/347—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells using displacement encoding scales
- G01D5/3473—Circular or rotary encoders
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optical Transform (AREA)
- Brushless Motors (AREA)
Description
【発明の詳細な説明】
本発明は、無整流子モータに内蔵されるパルス
発生装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a pulse generator built into a commutatorless motor.
モータの速度制御、位置制御をする場合、モー
タ回転軸にパルス発生装置を直結し、このパルス
に従つてモータを制御している。モータに無整流
子モータを使用する場合、無整流子モータには回
転子の相対位置を検出する回転子位置検出装置が
必要であるため、通常前記速度制御、位置制御用
パルス発生装置内にモータ駆動用の回転子位置検
出パルス発生装置も、設けられている。 When controlling the speed and position of a motor, a pulse generator is directly connected to the motor rotation shaft, and the motor is controlled according to the pulses. When using a non-commutator motor for the motor, a rotor position detection device that detects the relative position of the rotor is required for the non-commutator motor. A rotor position detection pulse generator for driving is also provided.
従来のパルス発生装置は、第１図に示すように
複数の光源７，８と複数の受光素子４，５と、光
源７，８と受光素子４，５との間に介在させた速
度制御用パルス（以下制御パルスと略す）と回転
子位置検出パルス（以下駆動パルスと略す）とを
発生するスリツトコードを備えた光しや断板９及
びマスク板６とからなつている。なお、第１図に
おいて、３はモータ１のシヤフト２に光しや断板
９を取り付けるためのエンコーダボス、１０はモ
ータ駆動回路である。 As shown in FIG. 1, the conventional pulse generator includes a plurality of light sources 7, 8, a plurality of light receiving elements 4, 5, and a speed control device interposed between the light sources 7, 8 and the light receiving elements 4, 5. It consists of a light shield plate 9 and a mask plate 6, each having a slit cord for generating pulses (hereinafter abbreviated as control pulses) and rotor position detection pulses (hereinafter abbreviated as drive pulses). In FIG. 1, reference numeral 3 indicates an encoder boss for attaching the light beam and cutting plate 9 to the shaft 2 of the motor 1, and 10 indicates a motor drive circuit.
以上の構成において、従来は、光しや断板９に
メタル薄板を使用し、このメタル薄板を、エツチ
ング又はプレス加工により前記制御パルスと駆動
パルスとを発生できるスリツトを形成したものを
使用している。この際、制御パルスは１回転当り
数十パルス程度のものから数百パルス以上のもの
もあるから、スリツト幅は数mm程度のものから数
十μｍのものもある。これに対して、駆動パルス
はモータの駆動コイル相数に対応しているので、
パルス幅は最小でもコイル切換え電気角に等しい
ので長さに換算して数十mmと広くなる。従つて、
メタル薄板自体の機械的強度が問題となり、特に
制御パルスが数百パルスを越えるとスリツト加工
上メタル薄板の板厚が数十μｍの単位となるため
機械的強度が弱くなるという欠点がある。また、
駆動パルス用スリツトが円板に対して非対称であ
るとメタル薄板の機械的強度が対称でなくなると
いう欠点がある。光しや断板９にガラス円板上に
クロムをスリツト状に蒸着したものを使用すると
いう方法もあるが、ガラス円板では衝撃に弱く、
割れ、欠けなどの問題が有り、一般に高価で実用
性に乏しい。 In the above configuration, conventionally, a thin metal plate is used for the light beam and cutting plate 9, and this thin metal plate is formed with slits that can generate the control pulses and drive pulses by etching or press processing. There is. At this time, since the control pulses range from several tens of pulses per revolution to several hundred pulses or more, the slit width ranges from several millimeters to several tens of micrometers. On the other hand, since the drive pulse corresponds to the number of motor drive coil phases,
Since the pulse width is at least equal to the coil switching electrical angle, it is converted to a length of several tens of millimeters. Therefore,
The mechanical strength of the thin metal plate itself becomes a problem, and in particular, when the control pulse exceeds several hundred pulses, the mechanical strength becomes weak because the thickness of the thin metal plate becomes tens of micrometers during slitting. Also,
If the driving pulse slit is asymmetrical with respect to the disk, there is a disadvantage that the mechanical strength of the thin metal plate is not symmetrical. There is also a method of using a glass disk with chromium vapor-deposited in the form of slits for the light beam and cutting plate 9, but a glass disk is weak against impact.
They have problems such as cracking and chipping, and are generally expensive and impractical.
さらに、従来の方式では、一つのモータに一つ
のエツチング薄板が必要であり、同一形状のモー
タでも駆動コイルの相数が異なれば新たに別種の
エツチング薄板が必要になり、高価になる。 Furthermore, in the conventional system, one etched thin plate is required for one motor, and even if the motors have the same shape, if the number of phases of the drive coil differs, a different type of etched thin plate is required, which increases the cost.
本発明の目的は上記欠点を改良したメタル薄円
板を用いたパルス発生装置を提供することにあ
る。 SUMMARY OF THE INVENTION An object of the present invention is to provide a pulse generator using a thin metal disk that overcomes the above-mentioned drawbacks.
以下本発明の実施例を第２図〜第５図を参照し
て説明する。 Embodiments of the present invention will be described below with reference to FIGS. 2 to 5.
第２図は本発明によるパルス発生装置の構成を
示すもので、無整流子モータ１のシヤフト２に、
同心円上に複数のスリツトコードが形成された第
一のメタル円板１１と無整流子モータの相電流を
適時切換えるためのスリツトコードを備えた第二
のメタル円板１２とがエンコーダボス３を通して
取り付けられている。光源７，８から照射される
光は、第二のメタル円板１２のスリツト（切欠
部）と第一のメタル円板１１のスリツトを通過
し、受光側に備えられたマスク板６のスリツトを
通して受光素子４，５に入射する。マスク板６の
スリツト部を第一のメタル円板１１もしくは第二
のメタル円板１２の非スリツト部が重畳した時に
は光源７，８からの照射光はしや断され受光素子
４，５はOFFの状態になる。また、マスク板６
のスリツト部と第一のメタル円板１１と第二のメ
タル円板１２のスリツト部が重畳した時には光源
７，８からの照射光は透過され受光素子４，５は
ONの状態になる。なお、１３は第一のメタル円
板１１と第二のメタル円板１２の重複したスリツ
トコードより生ずる電気信号から第二のメタル円
板１２より生ずる電気信号だけを取り出すための
電子装置である。 FIG. 2 shows the configuration of the pulse generator according to the present invention, in which the shaft 2 of the commutatorless motor 1 is
A first metal disc 11 on which a plurality of slit cords are formed concentrically and a second metal disc 12 equipped with slit cords for timely switching the phase current of a commutatorless motor are attached through the encoder boss 3. There is. The light emitted from the light sources 7 and 8 passes through the slit (notch) of the second metal disc 12 and the slit of the first metal disc 11, and then passes through the slit of the mask plate 6 provided on the light receiving side. The light enters the light receiving elements 4 and 5. When the slit portion of the mask plate 6 overlaps the non-slit portion of the first metal disk 11 or the second metal disk 12, the irradiated light from the light sources 7 and 8 is immediately cut off and the light receiving elements 4 and 5 are turned off. becomes the state of In addition, the mask plate 6
When the slit portion of the first metal disk 11 and the second metal disk 12 overlap, the irradiated light from the light sources 7 and 8 is transmitted and the light receiving elements 4 and 5 are
It becomes ON state. Note that 13 is an electronic device for extracting only the electric signal generated from the second metal disk 12 from the electric signal generated from the overlapping slit cords of the first metal disk 11 and the second metal disk 12.
以上の構成において、第一のメタル円板１１に
形成されるスリツトコードの中で第二のメタル円
板１２のスリツトコードと重ね合わされる位置の
スリツトコードは、第３図ａ，ｂに示すように第
一のメタル円板１１の非スリツトコードの幅S2は
マスク板６のスリツト幅S1に対してS1＞S2の関係
が満たされている。従つて、第一のメタル円板１
１の該スリツトコードにおいては光路を完全にし
や断することはなくS1，S2の幅に応じた受光信号
を発生する。第３図ａでは第一のメタル円板１１
のスリツト幅S3はS1より十分大であるが、第３図
ｂのようにS3がS1より小さくても本発明の基本的
思想は変わりない。得られる受光信号に関しては
第３図ａの方が有利であるが、スリツト幅S3が大
きくなる程、機械的強度が弱くなる。一方、通常
無整流子モータの駆動コイルの切換えは高精度で
ある必要がないので、第二のメタル円板１２の板
厚は第一のメタル円板１１の板厚に比べて十分厚
くとることができ、例えスリツト幅が大きくても
十分に強度をもたせることができる。 In the above configuration, among the slit cords formed on the first metal disc 11, the slit cords at the positions overlapping with the slit cords on the second metal disc 12 are located at the first slit cords as shown in FIGS. 3a and 3b. The width S 2 of the non-slit cord of the metal disk 11 satisfies the relationship S 1 >S 2 with respect to the slit width S 1 of the mask plate 6. Therefore, the first metal disk 1
In the slit cord No. 1, the optical path is not completely cut off, and a light reception signal corresponding to the widths of S 1 and S 2 is generated. In FIG. 3a, the first metal disk 11
Although the slit width S 3 is sufficiently larger than S 1 , the basic idea of the present invention does not change even if S 3 is smaller than S 1 as shown in FIG. 3b. The method shown in FIG. 3a is more advantageous in terms of the received light signal obtained, but the larger the slit width S3 , the weaker the mechanical strength becomes. On the other hand, since the switching of the drive coil of a commutatorless motor usually does not require high precision, the thickness of the second metal disk 12 should be sufficiently thicker than that of the first metal disk 11. Even if the slit width is large, sufficient strength can be achieved.
この第二のメタル円板１２のスリツトコードの
非スリツト部の幅は第一のメタル円板１１のスリ
ツト幅より十分大であるから、第二のメタル円板
１２の非スリツト部とマスク板６のスリツト部が
重なる時には光路を完全にしや断し、受光信号は
完全にOFFできる。第二のメタル円板１２のス
リツト部とマスク板６のスリツト部が重なる時に
は、照射光は第二のメタル円板１２は完全に透過
し、第一のメタル円板１１のスリツトの影響を受
けて受光信号を発生するが前述したように、該ス
リツトコード位置における第一のメタル円板１１
のスリツトコードはS1＞S2が満たされているので
光路を完全にしや断することはなく、第４図ａの
ような受光信号を発生する。無整流子モータの相
電流を切換えるための信号は、第二のメタル円板
１２のスリツトコードによつて生じるもののみが
必要であるため、比較器や、スレツシホールドレ
ベルを調整する電子回路１３で、第４図ａの電圧
V0以下の電圧をカツトして、同図ｂのような信
号に成形し、無整流子モータを駆動する信号とし
ている。 Since the width of the non-slit portion of the slit cord of the second metal disk 12 is sufficiently larger than the slit width of the first metal disk 11, the width of the non-slit portion of the second metal disk 12 and the mask plate 6 are When the slits overlap, the optical path is completely cut off, and the received light signal can be completely turned off. When the slits of the second metal disk 12 and the slits of the mask plate 6 overlap, the irradiated light completely passes through the second metal disk 12 and is not affected by the slits of the first metal disk 11. As mentioned above, the first metal disk 11 at the slit cord position generates a light reception signal.
Since the slit code satisfies S 1 >S 2 , the optical path is never completely cut off, and a light reception signal as shown in FIG. 4a is generated. Since only the signal generated by the slit cord of the second metal disk 12 is required for switching the phase current of the commutatorless motor, a comparator or an electronic circuit 13 for adjusting the threshold level is used. , the voltage in Fig. 4a
The voltage below V0 is cut off and shaped into a signal as shown in b in the same figure, which is used as a signal to drive the commutatorless motor.
なお、モータ、制御パルスは使用するシステム
によつて異なるものであり、どの制御システムに
も使用できよう、種々のパルスを発生するスリツ
トコードをそろえておく必要があるが、駆動パル
スと制御パルスを同一のメタル円板にエツチング
加工すれば、モータの種別が異なるとともに、別
種のエツチング薄板が必要となり、薄板の種類が
多く、高価になる。本発明は第二のメタル円板を
交換するだけで他機種モータに適用できるパルス
発生装置を提供できるが、第５図に示すように制
御パルス用マスク板１４、駆動パルス用マスク板
１５を分離形成し、制御パルス用マスク板１４を
寸法精度の高いエツチングで形成し、駆動パルス
用マスク板は高い寸法精度が必要、ないので、樹
脂成形等でマスク板を形成すれば多機種にわたつ
て同一のマスク板を提供することができる。また
マスク板を受光素子ホールダと兼用して樹脂成形
すれば、部品点数を削減できる。 Note that the motor and control pulses differ depending on the system used, and it is necessary to have a set of slit codes that generate various pulses so that they can be used with any control system. If etching is applied to a metal disk, the types of motors will be different and different types of etched thin plates will be required, resulting in a large number of types of thin plates and an increase in cost. The present invention can provide a pulse generator that can be applied to other types of motors by simply replacing the second metal disk, but as shown in FIG. 5, the mask plate 14 for control pulses and the mask plate 15 for drive pulses are separated. The mask plate 14 for control pulses is formed by etching with high dimensional accuracy, and the mask plate for drive pulses does not require high dimensional accuracy, so if the mask plate is formed by resin molding etc., it will be the same for many models. can provide mask plates. Furthermore, if the mask plate is also used as a light receiving element holder and is molded with resin, the number of parts can be reduced.
さらに、第２図において第一のメタル円板１１
及び第二のメタル円板１２をエンコーダボス３に
取り付ける時、第二のメタル円板１２の形状によ
つては、第一のメタル円板１１に不均一な圧力を
加えることになり、第一のメタル円板１１が不均
一に変形することある。この時、第一メタル円板
１１と第二のメタル板１２の間にワツシヤを挟持
させれば第一のメタル円板１１にかかる圧力は平
均され、不均一に変形することはない。 Furthermore, in FIG. 2, the first metal disk 11
When attaching the second metal disc 12 to the encoder boss 3, depending on the shape of the second metal disc 12, uneven pressure may be applied to the first metal disc 11. The metal disk 11 may be deformed non-uniformly. At this time, if a washer is sandwiched between the first metal disk 11 and the second metal disk 12, the pressure applied to the first metal disk 11 will be averaged, and the first metal disk 11 will not be deformed unevenly.
以上のように本発明によれば、第一のメタル円
板のスリツト幅を小さくすることができ、機械的
強度を高めることができるという利点がある。ま
たスリツトパターンを対称的な構造にできるので
安定した構造のメタル薄円板を得ることができ
る。さらに第二のメタル円板を交換するだけで他
機種モータにも利用できるという利点がある。 As described above, according to the present invention, there is an advantage that the slit width of the first metal disk can be reduced and the mechanical strength can be increased. Furthermore, since the slit pattern can be made symmetrical, a thin metal disk with a stable structure can be obtained. Another advantage is that it can be used with other motor models by simply replacing the second metal disc.
第１図は従来のパルス発生装置の概略構成を示
す斜視図、第２図は本発明にかかるパルス発生装
置の概略構成を示す斜視図、第３図ａ，ｂは第２
図の駆動パルス発生部分のスリツト断面図、第４
図ａ，ｂは発生信号の説明図、第５図は第２図の
マスク板の他の実施例を示す断面図である。
１……モータ、２……シヤフト、４，５……受
光素子、６……マスク板、７，８……光源、１１
……第一のメタル円板、１２……第二のメタル円
板、１３……電子装置。
FIG. 1 is a perspective view showing a schematic configuration of a conventional pulse generator, FIG. 2 is a perspective view showing a schematic configuration of a pulse generator according to the present invention, and FIGS.
4th cross-sectional view of the slit in the drive pulse generation part shown in the figure.
Figures a and b are explanatory diagrams of generated signals, and Figure 5 is a sectional view showing another embodiment of the mask plate of Figure 2. 1... Motor, 2... Shaft, 4, 5... Light receiving element, 6... Mask plate, 7, 8... Light source, 11
...First metal disk, 12...Second metal disk, 13...Electronic device.
Claims (1)
し、同心円上に配置された複数種のスリツトコー
ドを有するモータのシヤフトに直結されたメタル
薄円板と、受光素子の前面に位置し、前記メタル
薄円板上に形成された前記スリツトコードのスリ
ツトピツチと等しいスリツトコード、もしくは単
一のスリツトを施したマスク板とを備え、前記メ
タル薄円板は、前記メタル薄円板上の任意のスリ
ツトコードの非スリツト部の幅を、該スリツトコ
ードに対応してマスク板に形成されるスリツト幅
より小となした第一のメタル円板と、該スリツト
コードと同一径にて該スリツト幅より大なるスリ
ツトを形成した第二のメタル円板とよりなり、第
一のメタル円板と第二のメタル円板とをモータシ
ヤフトに重合し、第一のメタル円板と第二のメタ
ル円板の重複したスリツトコードより生ずる電気
信号から、第二のメタル円板より生ずる電気信号
だけを取り出すよう構成したパルス発生装置。 ２ 第二のメタル円板のスリツトコードに対応す
る受光側のマスク板を樹脂にて成形し、第二のメ
タル円板が重複しない第一のメタル円板のみのス
リツトコードに対応する受光側のマスク板をメタ
ル板にて形成した特許請求の範囲第１項記載のパ
ルス発生装置。 ３ 第一のメタル円板と第二のメタル円板との間
にスリツトコード径より小なる径のワツシヤを挟
持した特許請求の範囲第１項記載のパルス発生装
置。[Claims] 1. A thin metal disc located between a plurality of light sources and a plurality of light receiving elements and directly connected to the shaft of a motor having a plurality of types of slit cords arranged concentrically; a mask plate provided with a slit cord having a slit pitch equal to the slit pitch of the slit cord formed on the metal thin disk plate, or a single slit, located on the front side; A first metal disc whose width of the non-slit portion of any slit cord is smaller than the slit width formed on the mask plate corresponding to the slit cord, and a first metal disk having the same diameter as the slit cord and smaller than the slit width. a second metal disk forming a large slit; the first metal disk and the second metal disk are superimposed on the motor shaft; the first metal disk and the second metal disk A pulse generator configured to extract only the electrical signal generated from the second metal disk from the electrical signals generated from the overlapping slit cords. 2 A mask plate on the light receiving side that corresponds to the slit code of the second metal disk is molded with resin, and a mask plate on the light receiving side that corresponds to the slit code of only the first metal disk that does not overlap with the second metal disk. The pulse generator according to claim 1, wherein the pulse generator is formed of a metal plate. 3. The pulse generator according to claim 1, wherein a washer having a diameter smaller than the slit cord diameter is sandwiched between the first metal disc and the second metal disc.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57104906A JPS58221114A (en) | 1982-06-17 | 1982-06-17 | Pulse generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57104906A JPS58221114A (en) | 1982-06-17 | 1982-06-17 | Pulse generator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58221114A JPS58221114A (en) | 1983-12-22 |
| JPS6259245B2 true JPS6259245B2 (en) | 1987-12-10 |
Family
ID=14393162
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57104906A Granted JPS58221114A (en) | 1982-06-17 | 1982-06-17 | Pulse generator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58221114A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3528358B2 (en) * | 1995-09-26 | 2004-05-17 | オリンパス株式会社 | Movement detection device |
| CN106026536B (en) * | 2016-08-08 | 2018-12-18 | 成都茂源科技有限公司 | Direct-drive type ball mill permanent-magnet synchronous motor rotor position acquisition method and device |
-
1982
- 1982-06-17 JP JP57104906A patent/JPS58221114A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58221114A (en) | 1983-12-22 |
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