EP0203338B1 - Circuit d'entraînement pour moteur pas à pas - Google Patents

Circuit d'entraînement pour moteur pas à pas Download PDF

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Publication number
EP0203338B1
EP0203338B1 EP86105175A EP86105175A EP0203338B1 EP 0203338 B1 EP0203338 B1 EP 0203338B1 EP 86105175 A EP86105175 A EP 86105175A EP 86105175 A EP86105175 A EP 86105175A EP 0203338 B1 EP0203338 B1 EP 0203338B1
Authority
EP
European Patent Office
Prior art keywords
drive
pulses
pulse
duration
stepping motor
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.)
Expired
Application number
EP86105175A
Other languages
German (de)
English (en)
Other versions
EP0203338A2 (fr
EP0203338A3 (en
Inventor
Wolfgang Dipl.-Ing. Burkhardt
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.)
Pforzheimer Uhren Rohwerke Porta GmbH
Original Assignee
Pforzheimer Uhren Rohwerke Porta GmbH
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 Pforzheimer Uhren Rohwerke Porta GmbH filed Critical Pforzheimer Uhren Rohwerke Porta GmbH
Publication of EP0203338A2 publication Critical patent/EP0203338A2/fr
Publication of EP0203338A3 publication Critical patent/EP0203338A3/de
Application granted granted Critical
Publication of EP0203338B1 publication Critical patent/EP0203338B1/fr
Expired legal-status Critical Current

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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
    • G04C3/143—Means to reduce power consumption by reducing pulse width or amplitude and related problems, e.g. detection of unwanted or missing step

Definitions

  • the invention relates to a drive circuit for driving a stepper motor of a watch, which is inserted as an integrated circuit between a battery and the stepper motor and switches through one or more pulses of a certain duration for effecting a rotary step monitored by a detection system, drive pulses with load pulses depending on these pulses increasing duration serve normal operation and in each case a subsequent correction pulse with a relatively long duration relative to the drive pulses is provided, which can serve to overcome extreme load moments that occur in the event of a fault.
  • the power output of the battery per pulse had to be reduced, ie the pulse duration had to be shortened accordingly.
  • the limit here is a pulse duration that is just sufficient to normally cause the desired step of the stepper motor to rotate. In the event of deviations from this normal case, however, the clock stops immediately.
  • detection systems are provided in the known drive circuits, which emit a signal when the turning step has failed to occur after a given drive pulse. Then, triggered by this signal from the detection system, there follows a correction pulse which is dimensioned such that it causes the stepping motor to be rotated by one rotation step even in the event of deviations from the normal case.
  • the stepper motor may begin to rotate when a battery is inserted, since its energy reserves are greater than that of the battery previously used, so that the cause is actually not recognized and the battery must be replaced again and again at relatively short intervals.
  • switching element added to the usual drive circuit in the form of an “and” element which switches off the correction pulse or the stepper motor power supply when a detection signal is present and the longest drive pulse, possibly via further switching elements.
  • the other switching elements can be a bistable multivibrator, possibly in conjunction with other «and» components.
  • Further switching elements can also be timing elements (counters) in order to switch off the long pulses or the battery only after a few pulses have elapsed.
  • FIG. 1 shows a possibility of only switching off the large correction pulse, the long drive pulse remaining
  • FIG. 2 shows a second possibility of completely interrupting the power supply to the motor when the criteria mentioned occur.
  • T1, T2 and T3 denote the connections which carry current when the corresponding drive pulses are switched through, T1 meaning the smallest, normal pulse duration, T3 the largest pulse duration.
  • the «Detection» (or Det.) Connection then carries current when the De tection system indicates that the stepper motor has not rotated despite the presence of a drive pulse.
  • Connections Imp.1 and Imp. 2 pass the drive pulses, which have a shorter duration than T3, to the stepper motor via out or out2.

Landscapes

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

Claims (2)

1. Circuit d'entraînement pour entraîner le moteur pas à pas d'une montre, qui est interposé en tant que circuit intégré entre une batterie et le moteur pas à pas, et qui laisse respectivement passer, en vue de provoquer un pas de rotation surveillé par un système détecteur, une ou plusieurs impulsions de durée déterminée parmi lesquelles des impulsions d'entraînement (T1, T2, T3), d'une durée croissant en fonction du couple de charge, servent au fonctionnement en mode normal, et une impulsion correctrice successive considérée (départ correction), d'une grande durée comparativement aux impulsions d'entraînement, peut servir à surmonter des couples de charges extrêmes survenant en cas de perturbation, caractérisé par un organe additionnel de commutation revêtant la forme d'un opérateur ET (1, 2) qui, en présence d'un signal de détection (détection, dét.) et de l'impulsion d'entraînement la plus longue (T3), interrompt l'impulsion correctrice (départ correction) ou l'alimentation en courant (out1, out2) du moteur pas à pas, éventuellement par l'intermédiaire d'autres organes de commutation (3, 4).
2. Circuit d'entraînement selon la revendication 1, caractérisé par le fait que d'autres organes de commutation sont des organes temporisateurs (5).
EP86105175A 1985-05-25 1986-04-15 Circuit d'entraînement pour moteur pas à pas Expired EP0203338B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3519008A DE3519008C1 (de) 1985-05-25 1985-05-25 Schrittmotor-Antriebsschaltung
DE3519008 1985-05-25

Publications (3)

Publication Number Publication Date
EP0203338A2 EP0203338A2 (fr) 1986-12-03
EP0203338A3 EP0203338A3 (en) 1987-07-01
EP0203338B1 true EP0203338B1 (fr) 1989-11-08

Family

ID=6271748

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86105175A Expired EP0203338B1 (fr) 1985-05-25 1986-04-15 Circuit d'entraînement pour moteur pas à pas

Country Status (4)

Country Link
US (1) US4719368A (fr)
EP (1) EP0203338B1 (fr)
JP (1) JPS61275688A (fr)
DE (1) DE3519008C1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5070257A (en) * 1990-09-28 1991-12-03 Hughes Aircraft Company Circuitry for controlled rate of power application to CMOS microcircuits

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3166735A (en) * 1958-10-06 1965-01-19 Gen Electric Code selectors for selective calling systems
DE2216591B1 (de) * 1972-04-06 1973-08-09 Siemens Ag, 1000 Berlin U. 8000 Muenchen Einrichtung zum Melden und Sperren einer simultanen Befehlsgabe mehrerer Steuerbefehlsgeber einer Ablaufsteuerung
JPS5477169A (en) * 1977-12-02 1979-06-20 Seiko Instr & Electronics Ltd Electronic watch
CH616813B (fr) * 1977-12-28 Ebauches Sa Piece d'horlogerie electronique avec systeme de detection de fin de vie des piles.
JPS57106397A (en) * 1980-12-18 1982-07-02 Seiko Instr & Electronics Ltd Driving device for stepping motor
US4494013A (en) * 1981-02-06 1985-01-15 The Commonwealth Of Australia Gating circuit with spurious signal prevention means
US4420789A (en) * 1982-04-19 1983-12-13 General Electric Company Characteristic timer for a protective relay
DE3226558A1 (de) * 1982-07-16 1984-01-26 Eurosil GmbH, 8057 Eching Verfahren zum ermitteln kritisch abgesunkener batteriekapazitaet bei batteriebetriebenen kleingeraeten, insbesondere uhren und schaltungsanordnung zum ausueben des verfahrens
US4502014A (en) * 1982-11-24 1985-02-26 Rca Corporation Coincident pulse cancelling circuit

Also Published As

Publication number Publication date
EP0203338A2 (fr) 1986-12-03
EP0203338A3 (en) 1987-07-01
JPS61275688A (ja) 1986-12-05
DE3519008C1 (de) 1986-10-09
US4719368A (en) 1988-01-12

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