CH635477GA3 - - Google Patents

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Publication number
CH635477GA3
CH635477GA3 CH435978A CH435978A CH635477GA3 CH 635477G A3 CH635477G A3 CH 635477GA3 CH 435978 A CH435978 A CH 435978A CH 435978 A CH435978 A CH 435978A CH 635477G A3 CH635477G A3 CH 635477GA3
Authority
CH
Switzerland
Prior art keywords
motor
driving pulses
normal driving
rotation
resistance element
Prior art date
Application number
CH435978A
Other languages
French (fr)
Other versions
CH635477B (en
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
Publication of CH635477B publication Critical patent/CH635477B/en
Application filed filed Critical
Publication of CH635477GA3 publication Critical patent/CH635477GA3/fr

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

An analog electronic timepiece has a stepping motor for rotationally driving the timepiece hands. The motor is driven by normal driving pulses during normal load conditions and in the event the normal driving pulses are unable to effect rotation of the motor, correction driving pulses of longer pulse width than the normal driving pulses are used. A detection circuit detects whether or not the motor has rotated by switching a resistance element in series with the motor drive coil after the application of each normal driving pulse. Rotation and non-rotation of the motor is determined by measuring the voltage across the resistance element and comparing the measured voltage with a reference voltage.
CH435978A 1977-04-23 1978-04-21 STEP MOTOR ROTATION DETECTOR CIRCUIT OF AN ELECTRONIC CLOCK PART. CH635477B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4709377A JPS53136870A (en) 1977-04-23 1977-04-23 Electronic watch

Publications (2)

Publication Number Publication Date
CH635477B CH635477B (en)
CH635477GA3 true CH635477GA3 (en) 1983-04-15

Family

ID=12765561

Family Applications (1)

Application Number Title Priority Date Filing Date
CH435978A CH635477B (en) 1977-04-23 1978-04-21 STEP MOTOR ROTATION DETECTOR CIRCUIT OF AN ELECTRONIC CLOCK PART.

Country Status (6)

Country Link
US (2) US4209971A (en)
JP (1) JPS53136870A (en)
CH (1) CH635477B (en)
DE (1) DE2817645A1 (en)
FR (1) FR2388327B1 (en)
GB (1) GB1592893A (en)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53132382A (en) * 1977-04-23 1978-11-18 Seiko Instr & Electronics Ltd Electronic watch
JPS5477169A (en) * 1977-12-02 1979-06-20 Seiko Instr & Electronics Ltd Electronic watch
US4283783A (en) * 1978-11-28 1981-08-11 Citizen Watch Company Limited Drive control system for stepping motor
US4321521A (en) * 1978-12-25 1982-03-23 Kabushiki Kaisha Daini Seikosha Detection device of electronic timepiece
JPS55147381A (en) * 1979-05-04 1980-11-17 Seiko Instr & Electronics Ltd Detector for electronic watch
FR2471077A1 (en) * 1979-12-06 1981-06-12 Ebauches Sa REAL-TIME DETECTION WITH DYNAMIC ROTATION DETECTION FOR STEP-BY-STEP MOTOR
EP0030611B1 (en) * 1979-12-12 1985-07-03 Braun Aktiengesellschaft Method and arrangement for the control and regulation of a motor having a permanent-magnet rotor
JPS5886480A (en) * 1981-11-19 1983-05-24 Shimauchi Seiki Kk analog electronic clock
GB2101368B (en) * 1981-05-07 1985-02-27 Suwa Seikosha Kk Improvements in or relating to pulse actuated stepping motor driven electronic timepieces.
JPS5819584A (en) * 1981-07-27 1983-02-04 Seiko Epson Corp How to determine the rotor position of an analog electronic clock
NL8203094A (en) * 1982-08-04 1984-03-01 Philips Nv METHOD FOR ANALYZING THE VOLTAGE INDICATED IN A STEP MOTOR POWER COIL.
JPS5980147A (en) * 1982-10-29 1984-05-09 Rhythm Watch Co Ltd Small motor for timepiece
US4788527A (en) * 1984-09-17 1988-11-29 Johansson Fritz H Apparatus and method for device control using a two conductor power line
JP3541601B2 (en) * 1997-02-07 2004-07-14 セイコーエプソン株式会社 Control device for stepping motor, control method thereof, and timing device
JP2001258227A (en) * 2000-01-06 2001-09-21 Seiko Epson Corp Power generation device, timekeeping device and electronic device having the same, and method of adjusting cogging torque of power generation device

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5542356B2 (en) * 1972-12-22 1980-10-30
JPS6024680B2 (en) * 1973-03-07 1985-06-14 セイコーインスツルメンツ株式会社 Clock step motor drive circuit
US4150536A (en) * 1976-01-28 1979-04-24 Citizen Watch Company Limited Electronic timepiece
JPS5292560A (en) * 1976-01-29 1977-08-04 Seiko Instr & Electronics Ltd Switch box drive pulse width control circuit for electronic clocks
US4032827A (en) * 1976-03-15 1977-06-28 Timex Corporation Driver circuit arrangement for a stepping motor
JPS53114467A (en) * 1977-03-16 1978-10-05 Seiko Instr & Electronics Ltd Electronic watch
US4208886A (en) * 1978-12-04 1980-06-24 Borg-Warner Corporation Subcooling valve for split system air conditioning apparatus with remote condensing unit

Also Published As

Publication number Publication date
DE2817645A1 (en) 1978-10-26
FR2388327B1 (en) 1986-02-28
US4368990A (en) 1983-01-18
DE2817645C2 (en) 1988-07-28
JPS53136870A (en) 1978-11-29
CH635477B (en)
US4209971A (en) 1980-07-01
GB1592893A (en) 1981-07-08
FR2388327A1 (en) 1978-11-17
JPS629877B2 (en) 1987-03-03

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