JPH0330789U - - Google Patents
Info
- Publication number
- JPH0330789U JPH0330789U JP1989088739U JP8873989U JPH0330789U JP H0330789 U JPH0330789 U JP H0330789U JP 1989088739 U JP1989088739 U JP 1989088739U JP 8873989 U JP8873989 U JP 8873989U JP H0330789 U JPH0330789 U JP H0330789U
- Authority
- JP
- Japan
- Prior art keywords
- motor
- reference voltage
- mirror circuit
- current mirror
- transistor
- 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
- 238000010586 diagram Methods 0.000 description 1
Landscapes
- Control Of Direct Current Motors (AREA)
Description
第１図と第２図と第３図は本考案に係る直流モ
ータの回転数制御装置の各実施例を示す各回路図
、第４図は従来の直流モータの回転数制御装置の
一具体例を示す回路図である。
Ｍ……直流モータ、Ｑ２，Ｑｎ……駆動トラン
ジスタ、Ｑ１……分流トランジスタ、Ｒｔ……ト
ルク設定用抵抗、Ｖｃｃ……電源、ＲＳ，ＲＮ…
…可変抵抗、Ａ……演算増幅器、Ｄ……外付けダ
イオード。
1, 2, and 3 are circuit diagrams showing respective embodiments of a DC motor rotation speed control device according to the present invention, and FIG. 4 is a specific example of a conventional DC motor rotation speed control device. FIG. M...DC motor, Q2 , Qn...drive transistor, Q1 ...shunt transistor, Rt...torque setting resistor, Vcc...power supply, RS, RN...
...Variable resistor, A...Operation amplifier, D...External diode.
Claims (1)
にトルク設定用抵抗と分流トランジスタの直流接
続を並列接続し、上記各トランジスタにてカレン
トミラー回路を形成すると共に、直流モータに電
流を印加し、かつ、上記モータ及び抵抗と各トラ
ンジスタとの各接続点間を可変抵抗で接続し、上
記可変抵抗の両端に基準電圧源を介して演算増幅
器の２入力を接続してその出力を上記カレントミ
ラー回路の制御入力に加えてなり、直流モータの
回転によつて生じる逆起電力と基準電圧とを演算
増幅器により比較、増幅し、その出力でカレント
ミラー回路を制御して直流モータの回転数を一定
にする装置において、 上記基準電圧源を外付けダイオードにて構成し
たことを特徴とする直流モータの回転数制御装置
。[Claims for Utility Model Registration] A torque setting resistor and a DC connection of a shunt transistor are connected in parallel to the first series connection of the DC motor and the drive transistor, and each of the transistors forms a current mirror circuit. A current is applied, and a variable resistor is connected between the connection points of the motor, the resistor, and each transistor, and two inputs of an operational amplifier are connected to both ends of the variable resistor via a reference voltage source, and the output is obtained. In addition to the control input of the current mirror circuit described above, the back electromotive force generated by the rotation of the DC motor and the reference voltage are compared and amplified by an operational amplifier, and the output is used to control the current mirror circuit to control the DC motor. A device for controlling the rotation speed of a DC motor, characterized in that the reference voltage source is configured with an external diode, in the device for keeping the rotation speed constant.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1989088739U JPH0330789U (en) | 1989-07-27 | 1989-07-27 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1989088739U JPH0330789U (en) | 1989-07-27 | 1989-07-27 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0330789U true JPH0330789U (en) | 1991-03-26 |
Family
ID=31638335
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1989088739U Pending JPH0330789U (en) | 1989-07-27 | 1989-07-27 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0330789U (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60249885A (en) * | 1984-05-22 | 1985-12-10 | Mabuchi Motor Co Ltd | Speed controller of dc motor |
| JPS6260486A (en) * | 1985-09-06 | 1987-03-17 | Rohm Co Ltd | Speed controller for dc motor |
-
1989
- 1989-07-27 JP JP1989088739U patent/JPH0330789U/ja active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60249885A (en) * | 1984-05-22 | 1985-12-10 | Mabuchi Motor Co Ltd | Speed controller of dc motor |
| JPS6260486A (en) * | 1985-09-06 | 1987-03-17 | Rohm Co Ltd | Speed controller for dc motor |