JPS5937892A - Servo circuit for dc motor - Google Patents
Servo circuit for dc motorInfo
- Publication number
- JPS5937892A JPS5937892A JP14836682A JP14836682A JPS5937892A JP S5937892 A JPS5937892 A JP S5937892A JP 14836682 A JP14836682 A JP 14836682A JP 14836682 A JP14836682 A JP 14836682A JP S5937892 A JPS5937892 A JP S5937892A
- Authority
- JP
- Japan
- Prior art keywords
- motor
- transistor
- voltage
- supplied
- resistor
- 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.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P7/00—Arrangements for regulating or controlling the speed or torque of electric DC motors
- H02P7/06—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current
- H02P7/18—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power
- H02P7/24—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices
- H02P7/28—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices using semiconductor devices
- H02P7/285—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices using semiconductor devices controlling armature supply only
- H02P7/29—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices using semiconductor devices controlling armature supply only using pulse modulation
- H02P7/2913—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices using semiconductor devices controlling armature supply only using pulse modulation whereby the speed is regulated by measuring the motor speed and comparing it with a given physical value
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Direct Current Motors (AREA)
Abstract
Description
【発明の詳細な説明】
この発明は、簡単な構成によシ直流モータの回転速度を
制御できるサーが回路を提供するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention provides a circuit that can control the rotational speed of a DC motor with a simple configuration.
以下その一例について説明しよう。Let's explain one example below.
第１図において、Ｍは回転速度が制御される直流モータ
を示し、直流電源端子Ｔ、と接地との間に、スイッチン
グ用のトランジスタＱ２のエミッタ・コレクタ間とモー
タＭとが直列接続されると共に、モータＭに、スイッチ
ング用トランジスタＱ３のコレクタ・エミッタ間と逆起
電圧検出用の小さな値の抵抗器Ｒ１との直列回路が並列
接続され、トランジスタＱ２＋Ｑ３のペースにドライブ
用トランジスタＱ１のコレクタ出力が供給される。In FIG. 1, M indicates a DC motor whose rotational speed is controlled, and the motor M and the emitter-collector of a switching transistor Q2 are connected in series between the DC power supply terminal T and ground. , A series circuit between the collector and emitter of the switching transistor Q3 and a small-value resistor R1 for detecting back electromotive force is connected in parallel to the motor M, and the collector output of the drive transistor Q1 is supplied to the pace of the transistors Q2+Q3. be done.
そして、抵抗器Ｒ４に得られる電圧ｖｍが、直流レベル
シフト用のダイオードＤ１を通じてサンプリングホール
ド回路（１）に供給される。このサンプリングホールド
回路（すは、サンプリング用のトランジスタＱ４１Ｑ５
と、ホールド用のコンデンサＣ４とによシ構成され、ト
ランジスタＱ ４ ＋ Ｑ ５のペースニハトランジス
タＱ１のコレクタ出力が供給される。Then, the voltage vm obtained across the resistor R4 is supplied to the sampling and holding circuit (1) through the diode D1 for direct current level shift. This sampling hold circuit (sampling transistor Q41Q5)
and a hold capacitor C4, and the collector output of the transistor Q1 of transistors Q4+Q5 is supplied.
そして、このサンプリングホールド回路（１）の出力電
圧Ｖｄが、電圧比較回路（２）を構成するオペアンプＡ
１の非反転入力端に供給されると共に、可変抵抗器Ｒ２
からモータＭの回転速度を設定する電圧ｖ８がアンプＡ
１の反転入力に供給され、その比較出力ｖｃがオグアン
ゾＡ２の非反転入力に供給される。The output voltage Vd of this sampling and hold circuit (1) is determined by the operational amplifier A constituting the voltage comparison circuit (2).
1 and is supplied to the non-inverting input terminal of variable resistor R2.
The voltage v8 that sets the rotational speed of the motor M from the amplifier A
The comparison output vc is supplied to the non-inverting input of Oguanzo A2.
このオグアン！Ａ２は、キャリア周波数が１ｋＨｚ程度
の民変調回路（３）を構成しているもので、電圧ｖｅに
対して第２図に示すようなＰＷＭ Ａシス２ｗが取シ出
される。そして、このパルスＰｗがインバータＡ５を通
じてトランジスタＱ、のペースに供給される。This Oguan! A2 constitutes a private modulation circuit (3) with a carrier frequency of about 1 kHz, and a PWM A system 2w as shown in FIG. 2 is extracted for the voltage ve. This pulse Pw is then supplied to the transistor Q through the inverter A5.
このような構成によれば、Ｐｗ−０”のときには、トラ
ンジスタＱ１がオンとなるので、トランジスタＱ２がオ
ン、トランジスタＱ３がオフとなシ、従って、モータＭ
にはトランジスタＱ２を通じて電源電圧Ｖｃｃが供給さ
れるので、このとき、モータＭは加速される。また、Ｐ
ｗ＝１１”のときには、トランジスタＱ１がオフとなる
ので、トランジスタＱ２がオフ、トランジスタＱ３がオ
ンとなシ、従って、モータＭは、トランジスタＱ、及び
抵抗器Ｒ１を通じてショートされるので、このとき、モ
ータＭは減速される。According to this configuration, when Pw-0'', the transistor Q1 is turned on, the transistor Q2 is turned on, and the transistor Q3 is turned off, so that the motor M
Since the power supply voltage Vcc is supplied through the transistor Q2, the motor M is accelerated at this time. Also, P
When w=11'', transistor Q1 is off, transistor Q2 is off, and transistor Q3 is on. Therefore, motor M is short-circuited through transistor Q and resistor R1, so at this time, Motor M is decelerated.
従って、モータＭは、パルスＰｙが１０”のとき加速さ
れ、′１”のとき減速されると共に、このとキ、ノクル
スＰＷのキャリア周波数は１ｋＨｚ程度なので、モー
ｐ Ｍ ハパルスＰｗのデユーティ−レシオに対応した
速度で回転することになる。Therefore, the motor M is accelerated when the pulse Py is 10" and decelerated when the pulse Py is '1".
pM It rotates at a speed corresponding to the duty ratio of Hapulse Pw.
そして、モータＭにはその回転速度に比例した逆起電圧
ｖｍを生じているが、トランジスタＱ２がオフでトラン
ジスタＱ３がオンのとき（ｐｗ＝”ｉ”のと私その逆起
電圧■□がトランジスタＱ３を通じて抵抗器Ｒ１に取シ
出され、さらに、この電圧ｖｍが、このときオンになっ
ているトランジスタＱ ４ ＊ Ｑ ５によりサンプリ
ングされると共に、コンデンサＣ４にホールドされて直
流電圧Ｖｄとされる。従って、この電圧ｖｄは、モータ
Ｍの回転速度を示すことになる。Then, a back electromotive voltage vm proportional to the rotational speed is generated in the motor M, but when the transistor Q2 is off and the transistor Q3 is on (pw = "i", the back electromotive voltage □ of the transistor This voltage vm is taken out to the resistor R1 through Q3, and further sampled by the transistor Q4*Q5 which is turned on at this time, and is held in the capacitor C4 to become the DC voltage Vd. Therefore, this voltage vd indicates the rotational speed of the motor M.
そして、この電圧Ｖｄが、アンプＡ１において電圧ｖｓ
と比較され、その比較出力ｖｃが変調回路（３）に変調
入力として供給されてノヤルスＰｗのデユーティ−レシ
オが第２図に示すように制御される。従って、このとき
、モータＭの回転速度は一定に制御されると共に、電圧
ｖｓを変更すれば、電圧ｖｃが変化するので、モータＭ
の回転速度を変更できる。Then, this voltage Vd becomes the voltage vs
The comparison output vc is supplied to the modulation circuit (3) as a modulation input, and the duty ratio of Noyals Pw is controlled as shown in FIG. Therefore, at this time, the rotational speed of the motor M is controlled to be constant, and if the voltage vs is changed, the voltage vc changes, so the motor M
The rotation speed can be changed.
こうして、この発明によれば、直流モータＭが、同時に
発電機でもあることに着目し、加速と回転速度の検出と
を、ノ臂ルスＰｗによシ時分割式に行ってモータＭの回
転速度を制御しているので、その回転速度の検出にエン
コーダなどを必要とせず、構成が簡単である。In this way, according to the present invention, focusing on the fact that the DC motor M is also a generator at the same time, acceleration and detection of the rotational speed are performed in a time-sharing manner by the armature Pw, and the rotational speed of the motor M is Since the rotation speed is controlled, an encoder or the like is not required to detect the rotation speed, and the configuration is simple.
まだ、モータＭは回転しないと、逆起電圧■ｍを発生し
ないので、極めて大きな負荷を有する場合でも、低速回
転時の起動ができる。If the motor M does not rotate, the back electromotive force ■m will not be generated, so even if the motor M has an extremely large load, it can be started at low speed rotation.
第３図に示す例においては、サンブリングホールド回路
（３）を簡単化した場合である。In the example shown in FIG. 3, the sampling and holding circuit (3) is simplified.
’Ｊ Ｂ １上述において、抵抗器Ｒ１の値を大きくす
ると、モータＭの減速時の応答が遅くなるが、同様に制
御できる。'J B 1 In the above description, if the value of the resistor R1 is increased, the response during deceleration of the motor M becomes slower, but it can be controlled in the same way.
第１図、第３図はこの発明の一例の接続図、第２図はそ
の説明のだめの図であるＯ
Ｍは直流モータ、（３）は界Ｍ発振回路である。1 and 3 are connection diagrams of an example of the present invention, and FIG. 2 is a diagram for explaining the same. OM is a DC motor, and (3) is a field M oscillation circuit.
Claims (1)
タとが直列接続され、上記直流モータに対して第２のス
イッチング素子と、上記直流モータの逆起電圧を検出す
る検出素子との直列回路が並列接続され、上記検出素子
に得られる検出出力が直流化されてから溝変調回路に変
調入力として供給され、との瀧変調回路の出カッ４ルス
が上記第１及び第２のスイッチング素子に供給されてこ
れら第１及び第２のスイッチング素子は互いに逆関係に
オンオフされ、これによシ上記直流モータの回転速度が
サーが制御される直流モータのサーブ回路。A first switching element and a DC motor are connected in series to a DC power supply, and a series circuit of a second switching element and a detection element for detecting a back electromotive force of the DC motor is connected to the DC motor. connected in parallel, the detection output obtained from the detection element is converted into DC and then supplied to the groove modulation circuit as a modulation input, and the output pulse of the waterfall modulation circuit is supplied to the first and second switching elements. The first and second switching elements are turned on and off in an inverse relationship to each other, thereby controlling the rotational speed of the DC motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14836682A JPS5937892A (en) | 1982-08-26 | 1982-08-26 | Servo circuit for dc motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14836682A JPS5937892A (en) | 1982-08-26 | 1982-08-26 | Servo circuit for dc motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5937892A true JPS5937892A (en) | 1984-03-01 |
Family
ID=15451154
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14836682A Pending JPS5937892A (en) | 1982-08-26 | 1982-08-26 | Servo circuit for dc motor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5937892A (en) |
-
1982
- 1982-08-26 JP JP14836682A patent/JPS5937892A/en active Pending
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