JPS6460281A - Speed control circuit for motor - Google Patents
Speed control circuit for motorInfo
- Publication number
- JPS6460281A JPS6460281A JP62215810A JP21581087A JPS6460281A JP S6460281 A JPS6460281 A JP S6460281A JP 62215810 A JP62215810 A JP 62215810A JP 21581087 A JP21581087 A JP 21581087A JP S6460281 A JPS6460281 A JP S6460281A
- Authority
- JP
- Japan
- Prior art keywords
- converter
- motor
- analogue
- set value
- target value
- 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
Landscapes
- Control Of Electric Motors In General (AREA)
Abstract
PURPOSE:To improve precision of a D/A converter, by reducing the voltage applied to a full-scale decision terminal of the D/A converter when an analogue target value to be outputted from the D/A converter is smaller than the set value. CONSTITUTION:A microcomputer 10 outputs a 10V selection signal S1 when an analogue target value outputted from a D/A converter 2 is not less than the set value e.g. +5V. It outputs 5V selection signal S2 when this analogue target value is smaller than the set value. Analogue switches 11 and 12 apply +5V and +10V DC voltage to a fullscale decision terminal VREF of the D/A converter 2 by these selection signals S1 and S2. The output of the D/A converter is given to a drive circuit 16 through an error amplifier 13 and a motor 15 is driven with it.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62215810A JPS6460281A (en) | 1987-08-28 | 1987-08-28 | Speed control circuit for motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62215810A JPS6460281A (en) | 1987-08-28 | 1987-08-28 | Speed control circuit for motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6460281A true JPS6460281A (en) | 1989-03-07 |
Family
ID=16678634
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62215810A Pending JPS6460281A (en) | 1987-08-28 | 1987-08-28 | Speed control circuit for motor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6460281A (en) |
-
1987
- 1987-08-28 JP JP62215810A patent/JPS6460281A/en active Pending
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