JPS58165681A - Speed control circuit for dc motor - Google Patents
Speed control circuit for dc motorInfo
- Publication number
- JPS58165681A JPS58165681A JP57049302A JP4930282A JPS58165681A JP S58165681 A JPS58165681 A JP S58165681A JP 57049302 A JP57049302 A JP 57049302A JP 4930282 A JP4930282 A JP 4930282A JP S58165681 A JPS58165681 A JP S58165681A
- Authority
- JP
- Japan
- Prior art keywords
- motor
- speed control
- reference voltage
- control circuit
- voltage
- 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
- H02P7/2855—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 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】
本発明は直流モータの速度制御に係り、特に定速回転の
求められるテープレコーダ等に最適な電子ガバナと称せ
られる直流モータの速度制御回路に鵠する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to speed control of a DC motor, and particularly to a speed control circuit for a DC motor called an electronic governor, which is most suitable for tape recorders and the like that require constant speed rotation.
一般にモータの速度制御は、回転数に比例した電圧と、
基準電圧源からの基準電圧とを誤差検出回路に加えて比
較し、その差に対応した電圧を該誤差検出回路にて導出
して駆動手段に加え、前記直流モータの回転速度を一定
に保たれる構成が多く採用されている。In general, motor speed control uses a voltage proportional to the rotation speed,
A reference voltage from a reference voltage source is applied to an error detection circuit for comparison, and a voltage corresponding to the difference is derived by the error detection circuit and applied to the drive means to keep the rotational speed of the DC motor constant. Many configurations have been adopted.
前記直流モータは一定の界磁を有し、等価的に内部抵抗
Roと前記直流モータの回転によって誘起、される逆起
電力E、とを直列接続したものと考え嶌れる。前記直流
モータに流れる電流を工0前記直流モータの回転数をN
とすると、
工。−に、Z″h
Eo−N/に、Zi
が成立する。The DC motor has a constant magnetic field, and can be thought of as equivalently connecting an internal resistance Ro and a back electromotive force E induced by the rotation of the DC motor in series. The current flowing through the DC motor is 0, and the rotation speed of the DC motor is N.
Then, . −, Z″h Eo−N/, Zi holds true.
ここでに、Zi 及びに、Zi は各々逆起電力及び
トルクに関する定数を表わす。Here, Zi and Zi represent constants related to back electromotive force and torque, respectively.
従来は前記Eoを一定にするために、第1図の如く直流
電源用の端子(1)とアース間に直流モータ(2)及び
駆動トランジスタ+31 +31・・・及びエミッタ抵
抗+41 +41・・・の直列回路を接続すると共に誤
差検出回路(5)の入力端子+61 +71に各々基準
電圧源(8)と誤差検出抵抗(9)の一端とを接続し、
その出力端子α〔に前記駆動トランジスタ+31 (3
1・・・及び分流トランジスタ0υの各ペースが接続さ
れている。Conventionally, in order to keep Eo constant, a DC motor (2), drive transistors +31 +31... and emitter resistors +41 +41... were connected between the DC power supply terminal (1) and the ground as shown in Figure 1. A series circuit is connected, and a reference voltage source (8) and one end of an error detection resistor (9) are connected to input terminals +61 and +71 of the error detection circuit (5), respectively.
The drive transistor +31 (3
1... and the shunt transistor 0υ are connected to each other.
この場合逆起電力E0は
が成立する。上式でVrefは基準電圧源(8)の電圧
、R1は直列抵抗0の抵抗値で直流モータ(2)に加わ
る電圧vmは、
VIll−工IIIRm十EO・−(2)が成立する。In this case, the back electromotive force E0 is established. In the above equation, Vref is the voltage of the reference voltage source (8), R1 is the resistance value of the series resistor (0), and the voltage vm applied to the DC motor (2) is expressed as follows: VIll - IIIRm + EO - (2).
但し、工■はモータ電流、R■は直流モータ(2)の直
流抵抗を示し、直流モータ(2)の逆起電力Eoは前述
の(1)式の通り、
となって電流1.で速度制御を行うので第2項の基準電
圧源(8)の電圧が可変できない欠点があった。
・)(Kは誤差検出回路(5)及び駆動トランジス
タ(3)、分流トランジスタαりを含む系における定数
を示す)そこで本発明は、前記欠点を除去した新規な直
流モータの速度制御回路を提供するもので、以下図面に
従って説明する。However, E is the motor current, R is the DC resistance of the DC motor (2), and the back electromotive force Eo of the DC motor (2) is as shown in equation (1) above, so that the current 1. Since the speed control is carried out by , there is a drawback that the voltage of the reference voltage source (8) in the second term cannot be varied.
・) (K represents a constant in the system including the error detection circuit (5), the drive transistor (3), and the shunt transistor α) Therefore, the present invention provides a novel DC motor speed control circuit that eliminates the above-mentioned drawbacks. This will be explained below with reference to the drawings.
第2図は本発明の直流モータの速度制御回路を示し、第
1図と同一素子には同一図番を付してあり、αjは基準
電圧源(8)に並列に設けた分圧手段で、本実施例では
可変抵抗器を用いである。OIJは定電流源、(ハ)は
集積回路(IC)化した場合の工C内部を示し、αIQ
ηα穆αI(社)(社)は外部端子、(2)は分流トラ
ンジスタαυのエミッタ抵抗である。第2図におい・て
次式が成立する。Fig. 2 shows a speed control circuit for a DC motor according to the present invention, in which the same elements as in Fig. 1 are given the same figure numbers, and αj is a voltage dividing means provided in parallel with the reference voltage source (8). In this embodiment, a variable resistor is used. OIJ is a constant current source, (c) shows the inside of the device when integrated circuit (IC), αIQ
ηα穆αI (社) (社) is an external terminal, and (2) is an emitter resistance of the shunt transistor αυ. In FIG. 2, the following equation holds true.
Vr@f1= N’ref (RA/RA+RB )v
ll−工dRT + Vr*fl
BT=:= KRユ
ここで抵抗(9)の抵抗値Rcを充分大きくとれるが成
立する。(工S = Vr@f、/RC)第2図の一点
鎖線で示した工C内部QS内の基準電圧源兜の基準電圧
■、。fを、前記分圧手段として設けた可変抵抗器によ
ってVr@rを調整するこ従って特に前述の様に所要部
分をIC化した場合、内部の基準電圧源が固定であるに
も拘らず、いかなる逆起電力の直流モータにも対応させ
得るので、極めて応用範囲が広くなる。前述の様に基準
電圧Vr@f、 を所定値に設定すると、誤差検出回
路(5)の一方の入力端子(7)の他方の入力端子(6
)もVr@f、に設定される。回路智の出力信号により
、前記駆動トランジスタ(31(31・・・及び分流ト
ランジスタ圓を制御して、直流モータ(2)の逆起電力
EOは一定に保たれ、回転速度が一定となる。Vr@f1= N'ref (RA/RA+RB)v
ll-dRT+Vr*flBT=:=KRyuHere, the resistance value Rc of the resistor (9) can be made sufficiently large. (Work S = Vr@f, /RC) The reference voltage ■ of the reference voltage source in the work C internal QS shown by the dashed line in FIG. f and Vr@r are adjusted by the variable resistor provided as the voltage dividing means. Therefore, especially when the necessary parts are integrated into ICs as described above, even though the internal reference voltage source is fixed, any Since it can also be applied to DC motors with back electromotive force, the range of applications is extremely wide. When the reference voltage Vr@f is set to a predetermined value as described above, one input terminal (7) of the error detection circuit (5) and the other input terminal (6
) is also set to Vr@f. The drive transistors 31 (31...) and the shunt transistors are controlled by the output signal of the circuit 2, so that the back electromotive force EO of the DC motor (2) is kept constant and the rotational speed is kept constant.
次に第3図(イ)〜(ト)は、本発明に用いる分圧手段
の他の実施例を示し、(イ)(ロ)は半固定抵抗@と固
定抵抗(2)との構成、(ハ)に)は固定抵抗cgcs
cnと切換スイッチ(財)による構成、(ホ)はサーミ
スタ+7:4Jと固定抵抗@との構成で該サーミスタ(
ハ)は温度補償を施した例、(へ)(ト)は固定抵抗@
−とダイオード(至)とによって構成した例でトランジ
スタのペース・エミッタ間立上り電圧(’VBI)をダ
イオード(至)の順方向立上り電圧(Vr)によって補
償を行うことがてきる。Next, FIGS. 3(a) to (g) show other embodiments of the voltage dividing means used in the present invention, in which (a) and (b) show a configuration of a semi-fixed resistor @ and a fixed resistor (2), (c)) is fixed resistance CGCS
The structure consists of cn and a changeover switch (E), and the thermistor (E) consists of a thermistor +7:4J and a fixed resistor @.
C) is an example with temperature compensation, (f) and (g) are fixed resistance @
- and a diode (to), the transistor's pace-to-emitter rising voltage ('VBI) can be compensated by the forward direction rising voltage (Vr) of the diode (to).
第2図の実施例で、外部端子として(転)を設けておけ
ば、Vr@tの温度係数は誤差検出抵抗(9)(9)の
温度係数が一定ならば、抵抗値Rム、R1で設定した温
度係数を有し、前記抵抗(9)(9)に興なる温度係数
の抵抗を挿入すると、種々の温度特性を有する制御、温
度補償を行うことができる。In the embodiment shown in FIG. 2, if the external terminal is provided, the temperature coefficient of Vr@t will be the resistance value Rm, if the temperature coefficient of the error detection resistor (9) (9) is constant. By inserting a resistor having a temperature coefficient set as above and having a temperature coefficient similar to that of the resistors (9) and (9), control and temperature compensation having various temperature characteristics can be performed.
又多段スピード特性を達成させる場合には、前記(ハ)
に)の切換スイッチ(財)の切換により、基準電圧その
ものを変化させるために、トルク特性は不変−にし得る
。In addition, in order to achieve multi-stage speed characteristics, the above (c)
The torque characteristics can be kept unchanged by changing the reference voltage itself by changing the changeover switch.
更に電圧vr@fをEOに近づけて、制御できるので、
速度調整が非常に容易になり、これに伴って信頼性も向
上する。Furthermore, since the voltage vr@f can be controlled by bringing it closer to EO,
Speed adjustment becomes much easier, and reliability is improved accordingly.
以上の通り本発明によれば、基準電圧を分圧することに
よって、種々の直流モータ即ち逆起電力の小さい特性を
有する直流モータにも対応させて適度制御が行える利点
が得られる。As described above, according to the present invention, by dividing the reference voltage, there is an advantage that appropriate control can be achieved in correspondence with various DC motors, that is, DC motors having characteristics of small back electromotive force.
第1図は従来の直流モータの速度制御回路、第2図は本
発明の同速度制御回路の一′実施例、第3図(イ)〜(
ト)は本発明の同速度制御回路に用いる分圧手段の実施
例を示す。
主な図番の説明
(1)・・・直流電源端子、(2)・・・直流モータ、
(3)・・・駆動トランジスタ、(5)・・・誤差検出
回路、161 +71・・・入力端子、(8)・・・基
準電圧源、(9)・・・誤差検出抵抗、α・・・・出力
端子、α℃・・・分流トランジスタ、0・・・分圧手段
。Fig. 1 shows a conventional speed control circuit for a DC motor, Fig. 2 shows an embodiment of the same speed control circuit according to the present invention, and Figs.
(g) shows an embodiment of the voltage dividing means used in the same speed control circuit of the present invention. Explanation of main drawing numbers (1)...DC power supply terminal, (2)...DC motor,
(3)...Drive transistor, (5)...Error detection circuit, 161 +71...Input terminal, (8)...Reference voltage source, (9)...Error detection resistor, α... ...Output terminal, α℃...Shunt transistor, 0...Voltage dividing means.
Claims (1)
、基準電圧源に接続された分圧手段と、前記誤差検出回
路の出力端子に入力電極が接続されかつ出力電極が直流
モータに接続された駆動トランジスタと、前記誤差検出
回路の出力端子に入力電極が接続されかつ出力電極が前
記基準電圧源の一端に接続された分流トランジスタと、
前記直流モータの一端に接続された直流電源とより成り
、前記分圧手段の分圧出力端を前記第1の入力端子に接
続すると共に前記直流モータの両端の電圧変動分を検出
する誤差検出抵抗を前記第2の入力端子に接続したこと
を特徴とする直流モータの速度制御回路。 (21前記特許請求の範−第1項において、前記分圧手
段として、可変抵抗器を用いたことを特徴とする直流モ
ータの速度制御回路。 (3)前記特許請求の範囲第1項において、前記分圧手
段として、一対の抵抗の中の一方の抵抗に可変抵抗器を
用いたことを特徴とする直流モータの速度制御回路。 (4)前記特許請求範囲第1項に詔いて、前記分圧手段
として複数の抵抗と切換スイッチを設け、選択的に切換
え、所定の分圧比になしたことを特徴とする直流モータ
の速度制御回路。 (5)前記特許請求の範囲第1項に詔いて、前記□ 分
圧手段として、少くとも1の温度依存性抵抗素子を用い
たことを特徴とする直流モータの速度制御回路。 (6)前記特許請求の範囲第1項において、前記分圧手
段として、抵抗とダイオードを用いたことを特徴とする
直流モータの速度制御回路。 ・[Scope of Claims] (1) An error detection circuit having first and second input terminals, voltage dividing means connected to a reference voltage source, and an input electrode connected to the output terminal of the error detection circuit; a drive transistor whose output electrode is connected to the DC motor; a shunt transistor whose input electrode is connected to the output terminal of the error detection circuit and whose output electrode is connected to one end of the reference voltage source;
an error detection resistor comprising a DC power supply connected to one end of the DC motor, connecting the voltage division output end of the voltage dividing means to the first input terminal, and detecting voltage fluctuations at both ends of the DC motor; A speed control circuit for a DC motor, characterized in that: is connected to the second input terminal. (21) In claim 1, the speed control circuit for a DC motor is characterized in that a variable resistor is used as the voltage dividing means. (3) In claim 1, A speed control circuit for a DC motor, characterized in that a variable resistor is used as one of a pair of resistors as the voltage dividing means. A speed control circuit for a DC motor, characterized in that a plurality of resistors and changeover switches are provided as pressure means, and are selectively switched to achieve a predetermined voltage division ratio. (5) As set forth in claim 1, , said □ A speed control circuit for a DC motor, characterized in that at least one temperature-dependent resistance element is used as the voltage dividing means. (6) In claim 1, as the voltage dividing means: , a speed control circuit for a DC motor characterized by using a resistor and a diode.・
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP57049302A JPS58165681A (en) | 1982-03-26 | 1982-03-26 | Speed control circuit for dc motor |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP57049302A JPS58165681A (en) | 1982-03-26 | 1982-03-26 | Speed control circuit for dc motor |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS58165681A true JPS58165681A (en) | 1983-09-30 |
Family
ID=12827135
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP57049302A Pending JPS58165681A (en) | 1982-03-26 | 1982-03-26 | Speed control circuit for dc motor |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS58165681A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6348398U (en) * | 1986-09-12 | 1988-04-01 | ||
US4788478A (en) * | 1986-09-26 | 1988-11-29 | Nec Corporation | Speed control system for DC motor |
JPH0226392U (en) * | 1988-08-03 | 1990-02-21 | ||
JPH02164293A (en) * | 1988-12-19 | 1990-06-25 | Matsushita Electric Ind Co Ltd | Speed controller for dc motor |
JPH0595198U (en) * | 1992-05-27 | 1993-12-24 | 株式会社三協精機製作所 | DC motor speed controller |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5625392A (en) * | 1979-08-04 | 1981-03-11 | Sankyo Seiki Mfg Co Ltd | Speed controller for compact dc motor |
-
1982
- 1982-03-26 JP JP57049302A patent/JPS58165681A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5625392A (en) * | 1979-08-04 | 1981-03-11 | Sankyo Seiki Mfg Co Ltd | Speed controller for compact dc motor |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6348398U (en) * | 1986-09-12 | 1988-04-01 | ||
US4788478A (en) * | 1986-09-26 | 1988-11-29 | Nec Corporation | Speed control system for DC motor |
JPH0226392U (en) * | 1988-08-03 | 1990-02-21 | ||
JPH02164293A (en) * | 1988-12-19 | 1990-06-25 | Matsushita Electric Ind Co Ltd | Speed controller for dc motor |
JPH0595198U (en) * | 1992-05-27 | 1993-12-24 | 株式会社三協精機製作所 | DC motor speed controller |
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