CH644488GA3 - - Google Patents

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Publication number
CH644488GA3
CH644488GA3 CH813181A CH813181A CH644488GA3 CH 644488G A3 CH644488G A3 CH 644488GA3 CH 813181 A CH813181 A CH 813181A CH 813181 A CH813181 A CH 813181A CH 644488G A3 CH644488G A3 CH 644488GA3
Authority
CH
Switzerland
Prior art keywords
driving
pulse
driving pulse
rotor
driver
Prior art date
Application number
CH813181A
Other languages
French (fr)
Other versions
CH644488B (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 CH644488B publication Critical patent/CH644488B/en
Application filed filed Critical
Publication of CH644488GA3 publication Critical patent/CH644488GA3/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
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P8/00—Arrangements for controlling dynamo-electric motors rotating step by step
    • H02P8/34—Monitoring operation

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Control Of Stepping Motors (AREA)
  • Electromechanical Clocks (AREA)
  • Valve Device For Special Equipments (AREA)

Abstract

A driving device of a stepping motor comprises a driver/detector circuit for detecting whether a rotor has rotated or not by comparing a voltage induced across a driving coil by the free oscillation of the rotor with a reference voltage after a driving pulse is cut off and a control circuit automatically varies the pulse width of the driving pulse in response to an output of the driver/detector circuit. The control circuit includes circuitry for lowering the reference voltage when the pulse width of the driving pulse is lengthened thereby enabling use of a wider range of driving pulse widths than would otherwise be possible.
CH8131/81A 1980-12-18 1981-12-18 STEP MOTOR CONTROL DEVICE. CH644488B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55179504A JPS57106397A (en) 1980-12-18 1980-12-18 Driving device for stepping motor

Publications (2)

Publication Number Publication Date
CH644488B CH644488B (en)
CH644488GA3 true CH644488GA3 (en) 1984-08-15

Family

ID=16066964

Family Applications (1)

Application Number Title Priority Date Filing Date
CH8131/81A CH644488B (en) 1980-12-18 1981-12-18 STEP MOTOR CONTROL DEVICE.

Country Status (4)

Country Link
US (1) US4518906A (en)
JP (1) JPS57106397A (en)
CH (1) CH644488B (en)
GB (1) GB2090086B (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH653850GA3 (en) * 1983-08-12 1986-01-31
DE3519008C1 (en) * 1985-05-25 1986-10-09 Pforzheimer Uhren-Rohwerke Porta GmbH, 7530 Pforzheim Stepper motor drive circuit
EP0982846B1 (en) * 1998-08-25 2011-10-19 ETA SA Manufacture Horlogère Suisse Process and device for controlling a stepper motor

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4219999A (en) * 1977-03-03 1980-09-02 Citizen Watch Company, Limited Electronic timepiece equipped with battery life display
JPS5413379A (en) * 1977-07-01 1979-01-31 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

Also Published As

Publication number Publication date
JPS57106397A (en) 1982-07-02
GB2090086B (en) 1984-04-18
US4518906A (en) 1985-05-21
CH644488B (en)
GB2090086A (en) 1982-06-30
JPH0127680B2 (en) 1989-05-30

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