GB1434682A - Driving circuit for a stepping motor of a timepiece - Google Patents

Driving circuit for a stepping motor of a timepiece

Info

Publication number
GB1434682A
GB1434682A GB823574A GB823574A GB1434682A GB 1434682 A GB1434682 A GB 1434682A GB 823574 A GB823574 A GB 823574A GB 823574 A GB823574 A GB 823574A GB 1434682 A GB1434682 A GB 1434682A
Authority
GB
United Kingdom
Prior art keywords
motor
signal
circuit
resistor
coil
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
GB823574A
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
Publication of GB1434682A publication Critical patent/GB1434682A/en
Expired 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
    • G04C3/16—Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means incorporating an electro-dynamic continuously rotating motor
    • 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
    • H02P8/14—Arrangements for controlling speed or speed and torque
    • H02P8/16—Reducing energy dissipated or supplied
    • 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
    • H02P8/32—Reducing overshoot or oscillation, e.g. damping

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electromechanical Clocks (AREA)
  • Control Of Stepping Motors (AREA)

Abstract

1434682 Electronic watches DAINI SEIKOSHA K K 22 Feb 1974 [7 March 1973] 8235/74 Heading G3T [Also in Division H2] A circuit for driving a timepiece stepping motor M by pulses which are derived from a clockpulse generator CP comprises means for detecting the end of each rotary step of the motor and feeding a corresponding signal E back into the circuit to terminate the respective pulse applied to the motor and thus conserve battery energy, and means for placing a low impedance across the motor terminals between steps to provide a holding torque. As shown the coil of motor M is in a bridge circuit using complementary F.E.T.s and connected across supply V DD -V SS in series with a resistor R. The gates of the F.E.T.s are connected to respective outputs Q 1 , Q 2 of flip-flops F 1 , F 2 which receive antiphase timing pulses A, B e.g. of 1 Hz from the last divider stage of the generator CP. The current drawn by the motor through resistor R produces a voltage impulse C which is amplified and differentiated to give signal D. This is inverted giving a signal E at each instant (P1) Fig. 2, (not shown) when the motor completes a step, this signal being applied to reset terminals Rt of F 1 and F 2 which therefore produce abbreviated pulse outputs F, G and the motor receives an alternating pulsed voltage H. When the rotor of the motor is stationary, the coil M is short-circuited through the F.E.T.s.
GB823574A 1973-03-07 1974-02-22 Driving circuit for a stepping motor of a timepiece Expired GB1434682A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2610273A JPS6024680B2 (en) 1973-03-07 1973-03-07 Clock step motor drive circuit

Publications (1)

Publication Number Publication Date
GB1434682A true GB1434682A (en) 1976-05-05

Family

ID=12184218

Family Applications (1)

Application Number Title Priority Date Filing Date
GB823574A Expired GB1434682A (en) 1973-03-07 1974-02-22 Driving circuit for a stepping motor of a timepiece

Country Status (5)

Country Link
JP (1) JPS6024680B2 (en)
CH (2) CH576164B5 (en)
DE (1) DE2409925C2 (en)
FR (1) FR2220919B1 (en)
GB (1) GB1434682A (en)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5345575A (en) * 1976-10-06 1978-04-24 Seiko Epson Corp Electronic wristwatch
JPS5370876A (en) * 1976-12-07 1978-06-23 Seiko Instr & Electronics Ltd Electronic wristwatch
JPS53114467A (en) * 1977-03-16 1978-10-05 Seiko Instr & Electronics Ltd Electronic watch
JPS53132383A (en) * 1977-04-23 1978-11-18 Seiko Instr & Electronics Ltd Electronic watch circuit
JPS53132381A (en) * 1977-04-23 1978-11-18 Seiko Instr & Electronics Ltd Electronic watch
JPS53136870A (en) * 1977-04-23 1978-11-29 Seiko Instr & Electronics Ltd Electronic watch
JPS53132384A (en) * 1977-04-23 1978-11-18 Seiko Instr & Electronics Ltd Electronic watch
JPS53132382A (en) * 1977-04-23 1978-11-18 Seiko Instr & Electronics Ltd Electronic watch
JPS53132385A (en) * 1977-04-23 1978-11-18 Seiko Instr & Electronics Ltd Electronic watch
JPS53132386A (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
JPS55147381A (en) * 1979-05-04 1980-11-17 Seiko Instr & Electronics Ltd Detector for electronic watch
FR2459579A1 (en) * 1979-06-21 1981-01-09 Suisse Horlogerie ADVANCE DETECTOR OF A STEP BY STEP MOTOR
CH640999B (en) * 1980-08-25 Ebauchesfabrik Eta Ag METHOD AND DEVICE FOR CONTROLLING A STEP MOTOR OF AN ELECTRONIC CLOCK PART.
DE3043634A1 (en) * 1980-11-19 1982-06-03 Eurosil GmbH, 8000 München POLWENDER DRIVER CIRCUIT, FOR A STEPPING MOTOR, ESPECIALLY FOR WATCHES
CH644989GA3 (en) * 1981-03-18 1984-09-14

Also Published As

Publication number Publication date
FR2220919B1 (en) 1978-09-29
CH323674A4 (en) 1975-12-31
JPS49114020A (en) 1974-10-31
CH576164B5 (en) 1976-05-31
DE2409925C2 (en) 1982-09-16
DE2409925A1 (en) 1974-09-12
JPS6024680B2 (en) 1985-06-14
FR2220919A1 (en) 1974-10-04

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Legal Events

Date Code Title Description
PS Patent sealed
PE20 Patent expired after termination of 20 years

Effective date: 19940221