JPS5582984A - Driving system of step motor for watch - Google Patents

Driving system of step motor for watch

Info

Publication number
JPS5582984A
JPS5582984A JP15878678A JP15878678A JPS5582984A JP S5582984 A JPS5582984 A JP S5582984A JP 15878678 A JP15878678 A JP 15878678A JP 15878678 A JP15878678 A JP 15878678A JP S5582984 A JPS5582984 A JP S5582984A
Authority
JP
Japan
Prior art keywords
motor
drive
pulse
step motor
signal
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
Application number
JP15878678A
Other languages
Japanese (ja)
Inventor
Nobuo Toyama
Narikazu Takahashi
Shinji Sawada
Masaki Obayashi
Tsutomu Ogasawara
Toshihiko Sakai
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ricoh Elemex Corp
Ricoh Co Ltd
Original Assignee
Ricoh Elemex Corp
Ricoh Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Ricoh Elemex Corp, Ricoh Co Ltd filed Critical Ricoh Elemex Corp
Priority to JP15878678A priority Critical patent/JPS5582984A/en
Publication of JPS5582984A publication Critical patent/JPS5582984A/en
Pending legal-status Critical Current

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 reduce the power consumption by applying a quick feed driving pulse higher in the voltage than the normal level in case the increased load gets the motor stuck, while the driving pulse held at the minimum for the normal rotation of the motor. CONSTITUTION:Under the normal condition, the signal of a dividing circuit 3 controls to produce a pulse signal with a width of 7.8ms at the cycle of one second by which current is fed alternately to a coil 4 of a step motor to drive. When the motor fails to rotate due to a large load for driving the calendar mechanism or the like, detection 21 is made by the second drive signal and a correction circuit 22 outputs two quick feed driving pulses before the subsequent drive pulse is produced. At this point, a voltage higher than the supply voltage Vcc is applied to the motor coil 4 from the power supply circuit 16 to increase the drive torque of the step motor.
JP15878678A 1978-12-19 1978-12-19 Driving system of step motor for watch Pending JPS5582984A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15878678A JPS5582984A (en) 1978-12-19 1978-12-19 Driving system of step motor for watch

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15878678A JPS5582984A (en) 1978-12-19 1978-12-19 Driving system of step motor for watch

Publications (1)

Publication Number Publication Date
JPS5582984A true JPS5582984A (en) 1980-06-23

Family

ID=15679298

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15878678A Pending JPS5582984A (en) 1978-12-19 1978-12-19 Driving system of step motor for watch

Country Status (1)

Country Link
JP (1) JPS5582984A (en)

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