JPS5580078A - System for driving step motor for watch - Google Patents
System for driving step motor for watchInfo
- Publication number
- JPS5580078A JPS5580078A JP15400178A JP15400178A JPS5580078A JP S5580078 A JPS5580078 A JP S5580078A JP 15400178 A JP15400178 A JP 15400178A JP 15400178 A JP15400178 A JP 15400178A JP S5580078 A JPS5580078 A JP S5580078A
- Authority
- JP
- Japan
- Prior art keywords
- motor
- step motor
- inoperative state
- drive
- circuit
- 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
- Electromechanical Clocks (AREA)
- Control Of Stepping Motors (AREA)
Abstract
PURPOSE:To drive a step motor for a watch with low power consumption at normal time by generating a quick feed drive pulse when detecting inoperative state of the motor and correcting it. CONSTITUTION:When a step motor does not rotate as predetermined due to increase of load or the like, a detector 23 detects the inoperative state of the step motor from the change of current in a motor drive circuit 14 to generate a detection signal S6. When a corrector circuit 24 receives the signal S6, it generates two quick feed pulses increased in its pulse duration, which pulses are supplied through the circuit 14 to a field winding 4. The signal S6 is also applied to a timer 8 to thereby increase the drive pulse duration in predetermined time. Thus, the time delay due to the motor inoperative state can be exactly corrected. Accordingly, since it normally uses the drive pulse having narrow duration, it can reduce the power consumption of the motor.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15400178A JPS5580078A (en) | 1978-12-12 | 1978-12-12 | System for driving step motor for watch |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15400178A JPS5580078A (en) | 1978-12-12 | 1978-12-12 | System for driving step motor for watch |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5580078A true JPS5580078A (en) | 1980-06-16 |
Family
ID=15574737
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP15400178A Pending JPS5580078A (en) | 1978-12-12 | 1978-12-12 | System for driving step motor for watch |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5580078A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5070571A (en) * | 1988-03-24 | 1991-12-10 | Nippon Wiperblade Co., Ltd. | Windshield wiper |
-
1978
- 1978-12-12 JP JP15400178A patent/JPS5580078A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5070571A (en) * | 1988-03-24 | 1991-12-10 | Nippon Wiperblade Co., Ltd. | Windshield wiper |
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