CH673750GA3 - - Google Patents

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Publication number
CH673750GA3
CH673750GA3 CH355688A CH355688A CH673750GA3 CH 673750G A3 CH673750G A3 CH 673750GA3 CH 355688 A CH355688 A CH 355688A CH 355688 A CH355688 A CH 355688A CH 673750G A3 CH673750G A3 CH 673750GA3
Authority
CH
Switzerland
Prior art keywords
instant
coil
voltage
integrator
rotor
Prior art date
Application number
CH355688A
Other languages
French (fr)
Other versions
CH673750B5 (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
Application filed filed Critical
Priority to CH3556/88A priority Critical patent/CH673750B5/fr
Priority to EP89116922A priority patent/EP0361209A1/en
Priority to JP1245349A priority patent/JPH02124000A/en
Publication of CH673750GA3 publication Critical patent/CH673750GA3/fr
Publication of CH673750B5 publication Critical patent/CH673750B5/fr

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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

Landscapes

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

Abstract

The process consists in detecting, by means of a coincidence circuit (11) the instant t(Zi) at which the voltage (Ui) induced in the coil (3) by the rotation of the permanent magnet (2) of the rotor of the motor passes zero. With the aid of an integrator-comparator circuit (12), the instant, corresponding to the instant sought, is determined at which the function <IMAGE> attains a value represented by a reference voltage (Vr). The latter is equal to the variation of the flux in the coil (3) produced by the passing of the rotor from the position at which the motion-induced voltage (Ui) is zero, to that corresponding to a stable static equilibrium. This instant is given by a short pulse of a signal (S) furnished by the integrator-comparator circuit (12), and applied to the input of a driving circuit (10) to engage a driving pulse at the terminals of the coil (3) of the motor. Application in particular to stepper motors for timepieces. <IMAGE>
CH3556/88A 1988-09-23 1988-09-23 CH673750B5 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CH3556/88A CH673750B5 (en) 1988-09-23 1988-09-23
EP89116922A EP0361209A1 (en) 1988-09-23 1989-09-13 Process and device for detecting the instant a rotor of a stepper motor passes a predetermined position, and process for controlling this motor
JP1245349A JPH02124000A (en) 1988-09-23 1989-09-22 Method and device for detecting moment when rotor for stepping motor is passed through fixed position and method of controlling said motor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH3556/88A CH673750B5 (en) 1988-09-23 1988-09-23

Publications (2)

Publication Number Publication Date
CH673750GA3 true CH673750GA3 (en) 1990-04-12
CH673750B5 CH673750B5 (en) 1990-10-15

Family

ID=4258536

Family Applications (1)

Application Number Title Priority Date Filing Date
CH3556/88A CH673750B5 (en) 1988-09-23 1988-09-23

Country Status (3)

Country Link
EP (1) EP0361209A1 (en)
JP (1) JPH02124000A (en)
CH (1) CH673750B5 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3645908B2 (en) * 1994-12-08 2005-05-11 シチズン時計株式会社 Motor drive device
WO2006029648A1 (en) 2004-09-17 2006-03-23 Airbus Deutschland Gmbh Counter electro-motoric force based functional status detection of an electro-motor

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0024737A1 (en) * 1979-09-04 1981-03-11 Societe Suisse Pour L'industrie Horlogere Management Services S.A. Detector for the movement of a stepping motor
GB2082806A (en) * 1980-08-25 1982-03-10 Ebauchesfabrik Eta Ag A method of reducing the power consumption of the stepping motor of an electronic timepiece
US4550279A (en) * 1982-09-10 1985-10-29 Fabriques D'horlogerie De Fontainemelon S.A. Step-by-step motor unit

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0024737A1 (en) * 1979-09-04 1981-03-11 Societe Suisse Pour L'industrie Horlogere Management Services S.A. Detector for the movement of a stepping motor
GB2082806A (en) * 1980-08-25 1982-03-10 Ebauchesfabrik Eta Ag A method of reducing the power consumption of the stepping motor of an electronic timepiece
US4550279A (en) * 1982-09-10 1985-10-29 Fabriques D'horlogerie De Fontainemelon S.A. Step-by-step motor unit

Also Published As

Publication number Publication date
CH673750B5 (en) 1990-10-15
JPH02124000A (en) 1990-05-11
EP0361209A1 (en) 1990-04-04

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Legal Events

Date Code Title Description
PLX Patent declared invalid from date of grant onwards