JPS54134667A - Drive control system of pulse motor for watch - Google Patents
Drive control system of pulse motor for watchInfo
- Publication number
- JPS54134667A JPS54134667A JP4218078A JP4218078A JPS54134667A JP S54134667 A JPS54134667 A JP S54134667A JP 4218078 A JP4218078 A JP 4218078A JP 4218078 A JP4218078 A JP 4218078A JP S54134667 A JPS54134667 A JP S54134667A
- Authority
- JP
- Japan
- Prior art keywords
- pulse motor
- voltage
- dividing
- circuit
- output
- 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
Classifications
-
- G—PHYSICS
- G04—HOROLOGY
- G04C—ELECTROMECHANICAL CLOCKS OR WATCHES
- G04C3/00—Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means
- G04C3/14—Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means incorporating a stepping motor
- G04C3/143—Means to reduce power consumption by reducing pulse width or amplitude and related problems, e.g. detection of unwanted or missing step
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Electromechanical Clocks (AREA)
- Control Of Stepping Motors (AREA)
Abstract
PURPOSE:To control the pulse motor reliably and securely, by detecting the potential of center tap of driving coil and controlling the driving of pulse motor. CONSTITUTION:By a detection circuit 9 comprising an inverter 10 which is adjusted to threshold voltage Vth by voltage dividing resistors r1, r3 in connection with a center tap B provided in the middle point of a driving coil 8 of a pulse motor, the induced voltage V of the tap point B is detected, and a counter 11 counts the dividing output phi1 of dividing circuit 2 until the voltage V becomes equal to voltage Vth, so that the time t until the voltage at point B reaches voltage Vth may be determined. On the other hand, a counter 13 counts the dividing output phi2 which is lower in frequency than the output phi1 from the circuit 2, and when the counts by the counter 11, 13 coincide with each other, a coincidence output is applied inot the inverter 16 from a coincidence circuit 15, so that AND gates 4, 5 are closed. Therefore, pulses having width corresponding to the required torque are applied to the coil 8, so that the driving of pulse motor may be controlled reliably and securely.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4218078A JPS54134667A (en) | 1978-04-12 | 1978-04-12 | Drive control system of pulse motor for watch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4218078A JPS54134667A (en) | 1978-04-12 | 1978-04-12 | Drive control system of pulse motor for watch |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS54134667A true JPS54134667A (en) | 1979-10-19 |
| JPS6261910B2 JPS6261910B2 (en) | 1987-12-23 |
Family
ID=12628781
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4218078A Granted JPS54134667A (en) | 1978-04-12 | 1978-04-12 | Drive control system of pulse motor for watch |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS54134667A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000236696A (en) * | 1999-02-16 | 2000-08-29 | Oriental Motor Co Ltd | Method and apparatus for controlling stepping motor, and steeping motor system |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1993019404A1 (en) * | 1992-03-18 | 1993-09-30 | Citizen Watch Co., Ltd. | Electronic machine with vibratory alarm |
| JP3432470B2 (en) * | 1992-03-18 | 2003-08-04 | シチズン時計株式会社 | Electronics |
-
1978
- 1978-04-12 JP JP4218078A patent/JPS54134667A/en active Granted
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000236696A (en) * | 1999-02-16 | 2000-08-29 | Oriental Motor Co Ltd | Method and apparatus for controlling stepping motor, and steeping motor system |
| JP4498518B2 (en) * | 1999-02-16 | 2010-07-07 | オリエンタルモーター株式会社 | Stepping motor control method and control apparatus, and stepping motor system |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6261910B2 (en) | 1987-12-23 |
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