JPS5510873A - Circuit for driving step motor - Google Patents
Circuit for driving step motorInfo
- Publication number
- JPS5510873A JPS5510873A JP8340978A JP8340978A JPS5510873A JP S5510873 A JPS5510873 A JP S5510873A JP 8340978 A JP8340978 A JP 8340978A JP 8340978 A JP8340978 A JP 8340978A JP S5510873 A JPS5510873 A JP S5510873A
- Authority
- JP
- Japan
- Prior art keywords
- high voltage
- thyristor
- step motor
- phase
- 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
Landscapes
- Control Of Stepping Motors (AREA)
Abstract
PURPOSE:To improve the frequency response of a step motor by utilizing the switching characteristics of a thyristor and the charging and discharging characteristics of a capacitor and applying high voltage to the step motor at starting time. CONSTITUTION:A main drive transistor 106 for energizing a two-phase excitation coil 103 is conducted by the output signal from a circuit block 101. Simultaneously, a thyristor 303 for applying high voltage to the coil 103 is conducted by the output gate signal from a circuit block 301. Thus, the second phase is excited by high voltage to increase the current exponetially. Then, the third phase is similarly excited. the thyristor 303 is reversely biased to be turned off by a capacitor 307 at the moment that high voltage is applied to the third phase excitation coil. Accordingly, when the low voltage power supply 119 is applied, the second phase excitation current is reduced, but the rotor is already rotated at this time. As a result, it does not need further current as the initial drive current due to the inertia to rotate as predetermined at an angle.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8340978A JPS5510873A (en) | 1978-07-08 | 1978-07-08 | Circuit for driving step motor |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8340978A JPS5510873A (en) | 1978-07-08 | 1978-07-08 | Circuit for driving step motor |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5510873A true JPS5510873A (en) | 1980-01-25 |
Family
ID=13801623
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP8340978A Pending JPS5510873A (en) | 1978-07-08 | 1978-07-08 | Circuit for driving step motor |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5510873A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62210898A (en) * | 1986-03-07 | 1987-09-16 | Seiko Epson Corp | Driving circuit for stepping motor |
-
1978
- 1978-07-08 JP JP8340978A patent/JPS5510873A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62210898A (en) * | 1986-03-07 | 1987-09-16 | Seiko Epson Corp | Driving circuit for stepping motor |
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