JPS6474092A - Rotation control circuit of dc motor - Google Patents
Rotation control circuit of dc motorInfo
- Publication number
- JPS6474092A JPS6474092A JP62230168A JP23016887A JPS6474092A JP S6474092 A JPS6474092 A JP S6474092A JP 62230168 A JP62230168 A JP 62230168A JP 23016887 A JP23016887 A JP 23016887A JP S6474092 A JPS6474092 A JP S6474092A
- Authority
- JP
- Japan
- Prior art keywords
- motor
- operates
- current
- transistors
- 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.)
- Granted
Links
Landscapes
- Control Of Direct Current Motors (AREA)
Abstract
PURPOSE:To prevent power loss at a controlling transistor from exceeding a permissible by adding a current limiting circuit. CONSTITUTION:The motor current controlling transistors 1 and 6 detect voltage of point A or point B which is connected to a motor terminal, and are controlled by the control circuits 3 and 8 so as to maintain a speed in constant. On the other hand, the transistors 2 and 7 are basically used as a switching element, but when motor current is enhanced, such as when the motor starts up or when motor load is getting heavier, and so forth, the base current is controlled by the control circuits 4 and 9 so as to keep saturation voltage between collector and emitter in low. Further, when the transistor 2 operates, a current limiting circuit 5 operates, and when the transistor 7 operates, a current limiting circuit 10 operates accordingly. And, the flow of excessive base current into each of the transistors 2 and 7 is prevented.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62230168A JP2702719B2 (en) | 1987-09-14 | 1987-09-14 | DC motor rotation control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62230168A JP2702719B2 (en) | 1987-09-14 | 1987-09-14 | DC motor rotation control circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6474092A true JPS6474092A (en) | 1989-03-20 |
| JP2702719B2 JP2702719B2 (en) | 1998-01-26 |
Family
ID=16903667
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62230168A Expired - Lifetime JP2702719B2 (en) | 1987-09-14 | 1987-09-14 | DC motor rotation control circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2702719B2 (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58198181A (en) * | 1982-05-15 | 1983-11-18 | Matsushita Electric Ind Co Ltd | DC motor |
| JPS59169380A (en) * | 1983-03-11 | 1984-09-25 | スペリ−・コ−ポレイシヨン | Servo motor controller for aircraft improved for limiting torque |
| JPS6055876A (en) * | 1983-09-02 | 1985-04-01 | Fuji Photo Film Co Ltd | Speed control circuit of dc motor |
| JPS6277078A (en) * | 1985-09-28 | 1987-04-09 | Fuji Photo Film Co Ltd | Bidirectional dc motor drive circuit with speed servo |
-
1987
- 1987-09-14 JP JP62230168A patent/JP2702719B2/en not_active Expired - Lifetime
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58198181A (en) * | 1982-05-15 | 1983-11-18 | Matsushita Electric Ind Co Ltd | DC motor |
| JPS59169380A (en) * | 1983-03-11 | 1984-09-25 | スペリ−・コ−ポレイシヨン | Servo motor controller for aircraft improved for limiting torque |
| JPS6055876A (en) * | 1983-09-02 | 1985-04-01 | Fuji Photo Film Co Ltd | Speed control circuit of dc motor |
| JPS6277078A (en) * | 1985-09-28 | 1987-04-09 | Fuji Photo Film Co Ltd | Bidirectional dc motor drive circuit with speed servo |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2702719B2 (en) | 1998-01-26 |
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