JPS5570773A - Electronic watch - Google Patents

Electronic watch

Info

Publication number
JPS5570773A
JPS5570773A JP14479378A JP14479378A JPS5570773A JP S5570773 A JPS5570773 A JP S5570773A JP 14479378 A JP14479378 A JP 14479378A JP 14479378 A JP14479378 A JP 14479378A JP S5570773 A JPS5570773 A JP S5570773A
Authority
JP
Japan
Prior art keywords
coercive force
maximum
step motor
force maximum
pulse
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
JP14479378A
Other languages
Japanese (ja)
Inventor
Masaaki Bandai
Akira Torisawa
Jun Ueda
Shuji Otawa
Masaharu Shida
Katsuhiko Sato
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.)
Seiko Instruments Inc
Original Assignee
Seiko Instruments Inc
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 Seiko Instruments Inc filed Critical Seiko Instruments Inc
Priority to JP14479378A priority Critical patent/JPS5570773A/en
Priority to DE19792946363 priority patent/DE2946363A1/en
Priority to FR7928444A priority patent/FR2442543A1/en
Priority to GB7940285A priority patent/GB2035625B/en
Publication of JPS5570773A publication Critical patent/JPS5570773A/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
    • 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

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Control Of Stepping Motors (AREA)
  • Electromechanical Clocks (AREA)

Abstract

PURPOSE:To ensure the normal operation of motor in any condition, by obtaining the drive pulse width of step motor required minimum normally, and applying the correction pulse with different pulse widths two or more if the rotor is not turned. CONSTITUTION:When the rotor is detected not turned at normal drive pulse P1, six pulses having the pulse widths are applied to the step motor, in which the output torque maximum P21 is obtained at 1.57V drive voltage CD, coercive force maximum P22, AC coercive force maximum P23 and the output torque maximum is P24 at drive voltage 1.8V, with DC coercive force maximum P25 and AC coercive force maximum P26. The step motor can normally be driven under any load conditions.
JP14479378A 1978-11-22 1978-11-22 Electronic watch Pending JPS5570773A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP14479378A JPS5570773A (en) 1978-11-22 1978-11-22 Electronic watch
DE19792946363 DE2946363A1 (en) 1978-11-22 1979-11-16 STEPPER MOTOR
FR7928444A FR2442543A1 (en) 1978-11-22 1979-11-19 ELECTRONIC WATCH
GB7940285A GB2035625B (en) 1978-11-22 1979-11-21 Electroni timepiece

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14479378A JPS5570773A (en) 1978-11-22 1978-11-22 Electronic watch

Publications (1)

Publication Number Publication Date
JPS5570773A true JPS5570773A (en) 1980-05-28

Family

ID=15370575

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14479378A Pending JPS5570773A (en) 1978-11-22 1978-11-22 Electronic watch

Country Status (4)

Country Link
JP (1) JPS5570773A (en)
DE (1) DE2946363A1 (en)
FR (1) FR2442543A1 (en)
GB (1) GB2035625B (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56164984A (en) * 1980-05-23 1981-12-18 Seiko Instr & Electronics Ltd Electronic watch
GB2134290B (en) * 1982-12-16 1986-02-26 Suwa Seikosha Kk An analog electronic timepiece
CA1239439A (en) * 1984-03-19 1988-07-19 William E. Schmitz Multiple phase stepper motor torque control apparatus and method
CN203151354U (en) * 2012-11-05 2013-08-21 武汉晨龙电子有限公司 Mating structure of stator sheet and magnetic steel of low-starting-voltage low-power stepping motor of watch movement

Also Published As

Publication number Publication date
GB2035625B (en) 1983-01-06
DE2946363A1 (en) 1980-06-04
FR2442543A1 (en) 1980-06-20
GB2035625A (en) 1980-06-18

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