JPS5577396A - Driving circuit for step motor - Google Patents
Driving circuit for step motorInfo
- Publication number
- JPS5577396A JPS5577396A JP15085478A JP15085478A JPS5577396A JP S5577396 A JPS5577396 A JP S5577396A JP 15085478 A JP15085478 A JP 15085478A JP 15085478 A JP15085478 A JP 15085478A JP S5577396 A JPS5577396 A JP S5577396A
- Authority
- JP
- Japan
- Prior art keywords
- output
- inverters
- battery
- coil
- current
- 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
Abstract
PURPOSE:To keep the current of the coil of a step motor almost constant and stably drive the motor, by providing a battery voltage detection circuit and by changing the turn-on resistances of transistors for supplying the current to the coil of the step motor, depending on the output of the detection circuit. CONSTITUTION:When the terminal voltage of a battery is high, the output of a battery voltage detection circuit 1 is at ''H'' and the output of an inverter 2 is at ''L''. Clocked inverters 3, 4 supplied with these outputs do not function. Inverters 5, 6 supplied with outputs from the output terminals 7a, 7b of a driving wave form generation circuit 7 act to limit the current of a coil 8 by the turn-on resistances of the channels of the inverters 5, 6. When the terminal voltage of the battery is low, the output inverters 5, 6. When the terminal voltage of the battery is low, the output of the battery voltage detection circuit 1 is at ''L'' and the output of the inverter 2 is at ''H''. At that time, the clocked inverters 3, 4 function and the current of the coil 8 is limited by the parallel-coupled value of the turn-on resistances of the channels of the inverters 5, 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15085478A JPS5577396A (en) | 1978-12-05 | 1978-12-05 | Driving circuit for step motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15085478A JPS5577396A (en) | 1978-12-05 | 1978-12-05 | Driving circuit for step motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5577396A true JPS5577396A (en) | 1980-06-11 |
Family
ID=15505817
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15085478A Pending JPS5577396A (en) | 1978-12-05 | 1978-12-05 | Driving circuit for step motor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5577396A (en) |
-
1978
- 1978-12-05 JP JP15085478A patent/JPS5577396A/en active Pending
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