EP0751445A1 - Générateur électrique pour pièce d'horlogerie - Google Patents

Générateur électrique pour pièce d'horlogerie Download PDF

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Publication number
EP0751445A1
EP0751445A1 EP96109810A EP96109810A EP0751445A1 EP 0751445 A1 EP0751445 A1 EP 0751445A1 EP 96109810 A EP96109810 A EP 96109810A EP 96109810 A EP96109810 A EP 96109810A EP 0751445 A1 EP0751445 A1 EP 0751445A1
Authority
EP
European Patent Office
Prior art keywords
coils
magnets
generator
pairs
generator according
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.)
Withdrawn
Application number
EP96109810A
Other languages
German (de)
English (en)
French (fr)
Inventor
Jean-Jacques Born
Rudolf Dinger
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.)
Asulab AG
Original Assignee
Asulab AG
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 Asulab AG filed Critical Asulab AG
Publication of EP0751445A1 publication Critical patent/EP0751445A1/fr
Withdrawn legal-status Critical Current

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    • G—PHYSICS
    • G04—HOROLOGY
    • G04C—ELECTROMECHANICAL CLOCKS OR WATCHES
    • G04C10/00—Arrangements of electric power supplies in time pieces
    • 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

Definitions

  • the present invention relates to timepieces, of electronic type in which the energy source is formed by an electric generator with continuous rotation driven by a barrel spring mechanism with manual or automatic winding.
  • the barrel mechanically drives both the time indication hands and the electric generator which, in turn, has two functions.
  • the second function of the generator consists in serving as a regulator of the timepiece in order to maintain the speed of rotation of the hands at the set value.
  • This timepiece 1 comprises a barrel 2 in which is disposed a spring 3. This can be wound by a winding mechanism, well known to watchmakers, which can be either manual or automatic and is commonly used in watches say mechanical.
  • Barrel 2 is coupled to needles 4 and to an electric generator 5 according to the invention by means of suitable gear trains 6 shown diagrammatically by dashed lines in the drawings.
  • the generator 5 is designed to supply an alternating voltage on terminals G1 and G2, which voltage is rectified by a rectifier 7 at the output of which is connected a buffer capacitor 8 and the actual electronic circuit 9 of the watch.
  • the generator 5 is made to rotate continuously at a constant speed which is for example 4 t / s.
  • a regulation circuit 10 is provided to which a frequency standard 11 such as a quartz is connected.
  • the regulation circuit 10 is capable of comparing the frequency of the alternating voltage supplied by the generator 5 with the frequency supplied by the frequency standard 11. If the comparison indicates that the generator is running too fast (the frequency of its output voltage is too high), the control circuit supplies a control signal on a line 12.
  • a short-circuit resistor 13 can be connected to the terminals of the generator 5 by means of a switch 14 which is controlled by the control signal.
  • the switch is controlled to close by the control signal (the generator rotates too fast)
  • the resistor 13 almost short-circuits the coils of the generator. The latter is therefore braked until it returns to the set speed.
  • the coils of the generator are sensitive not only to the variations of the fields which cross them and which are due to the magnets of the generator, but also to those of the external fields like the terrestrial magnetic field.
  • the voltage at the terminals of the generator may include a comparatively significant component which persists at the terminals of the generator, even though its output voltage should be substantially zero due to the position of the magnets of the generator relative to its coils.
  • the object of the invention is to propose an electric generator for a timepiece making it possible to remedy the difficulties which one experiences in the prior art in correctly regulating the operation of the generator and, consequently, that of the timepiece.
  • the invention therefore relates to an electric generator in particular for a timepiece comprising a stator provided with coils angularly spaced around the axis of rotation of the generator and a rotor rotatably mounted around this axis and comprising at least one coaxial rotor disk.
  • said axis and carrying inductor magnets characterized in that said coils are identical and arranged in at least one pair connected in series between the output terminals of the generator, in that said magnets are arranged in at least one pair of angularly spaced magnets from each other with respect to said axis and in that said coils are connected together in such a manner and said magnets have inducing fields such that, when these magnets travel in front of the coils, they induce fem that get stronger.
  • the output voltage of the generator according to the invention will at all times be the result of the only voltages induced in the coils by the magnets, resulting in which are canceled the components of tension due to external fields.
  • FIG. 2 shows an axial sectional view of an embodiment of a generator according to the invention.
  • the generator comprises a stator 21 symbolized by the dotted lines 22.
  • This stator 21 is mounted fixed in the plate (not shown) of the timepiece equipped with the generator according to the invention.
  • the mechanical construction of this stator is known per se and need not be described here.
  • the stator 21 has two identical coils 23 and 24. It is crossed by a shaft 25 which can rotate in bearings (not shown) around the axis XX of the generator.
  • Two rotor discs 26 and 27 made of a magnetic material are wedged on the shaft 25 while being coaxial with the axis XX and arranged on either side of the stator 21.
  • each rotor disc 26 and 27 carries two permanent magnets 28 and 29 oriented respectively upside down on the corresponding disc. In other words, on each disc, their N and S polarities are reversed.
  • magnets located angularly in the same location on the two discs 26 and 27 are oriented in opposite directions, opposite polarities therefore being respectively contiguous to these discs.
  • stator 21 the presence of magnets on either side of the stator 21 is optional, the generator being able to also operate if magnets are only provided for only one side of the stator, ie on a disc only.
  • FIG. 3 there is shown schematically a plan view of a first example of the generator according to the invention, assuming that it comprises only a single rotor disk, for example the lower disk 27 of FIG. 2.
  • the stator (not shown here) has two coils B11 and B12 also arranged in diametrically opposite positions relative to the axis X-X.
  • the magnets have just entered the respective spaces defined between the coils B11 and B12 and the disc 27, their polarities creating in these reverse flow coils. Given the direction of winding of the coils and their connection mode (which will be commented on later in the description, these flows induce in the coils of f.e.m. which reinforce each other between the terminals of the generator.
  • Figure 4 shows another embodiment of the generator, different from that of Figure 3 in that it comprises four magnets A21, A22, A23 and A24 arranged on the disc 27 with an angular offset of 90 °, these magnets cooperating with two coils B21 and B22.
  • two coils B31 and B32 cooperate with six magnets A31 to A36 offset angularly by 60 ° relative to the axis X-X of the generator.
  • the polarities of the diametrically opposite magnets of a pair of magnets have opposite polarities.
  • Figures 6A to 6F show several series connection diagrams for the generator coils shown in Figures 3 to 5, taking into account their winding direction, the coils being assumed to be placed so that their winding axis is perpendicular in terms of drawing. Furthermore, the arrows in solid lines have symbolized the polarity of the voltage generated in each coil by the passage in front of it of a generator magnet, and by arrows in dotted lines the direction of the voltage due to a variable flux which can be created there by an external magnetic field, without however taking into account either the value or the amplitude of these voltages, nor the moment at which one examines the situation in the generator.
  • the terminals thereof are designated by G1 and G2, while the ends of the winding of the coils are designated respectively by EE for the outer end and by EI for the inner end.
  • FIG. 6A it can be seen that the coils b1 and b2 are wound in the same direction, in this case clockwise. Furthermore, the internal ends EI are connected respectively to the terminals G1 and G2, while the external ends EE are connected to each other by forming the junction point PJ of the coils b1 and b2. It can be seen that under these conditions, the voltages due to the external field vanish, while the voltages due to the magnets are added since, as indicated above, the magnets which by their positions are diametrically opposed one by compared to each other, have reverse polarities.
  • the external ends EE of the coils b1 and b2 are connected respectively to the terminals G1 and G2 of the generator, while the internal ends EI of these coils are connected together to form the junction point PJ.
  • the coils b1 and b2 have coils wound in a clockwise direction, as seen in the figure and starting from the center of the coils.
  • Figures 6C and 6D show the connection diagrams respectively of two generators whose coils b1 and b2 are wound in opposite directions. Under these conditions, to obtain a cancellation of the voltages due to the external magnetic field and the reinforcement of the voltages due to the magnets of the generator, the coils are connected each time with their connections reversed with respect to those of FIGS. 6A and 6B. However, the orientation of the polarities of the magnets remains identical in the four cases considered.
  • FIG. 7 represents another embodiment of the invention in which the generator comprises two pairs of coils, respectively B41, B42 and B43, B44, the coils of each pair being here diametrically opposite.
  • This generator comprises two diametrically opposite magnets A41 and A42 and also of opposite polarities.
  • the number of pairs of magnets on the same rotor disc can here also be chosen to 2 or 3, or even more.
  • FIG. 8 represents another embodiment of the generator according to the invention which also comprises two pairs of coils, the coils of each pair being, not diametrically opposite, but contiguous to each other.
  • This generator comprises four magnets A51 to A54, the polarities of which are alternated from one magnet to the neighboring magnet.
  • Figures 9A and 9B show, among others, two possible connection diagrams of the generator coils according to Figures 7 and 8.
  • the four coils b1, b2, b1 'and b2' are mounted in series and form in fact, with regard to FIG. 9A, the placing in series of two assemblies according to FIG. 6A, and with regard to FIG. 9B, the placing in series of the assembly of FIG. 6E.
  • each pair of coils placed in series is associated with two magnets which, when they enter the respective spaces delimited between the coils and the rotor disk carrying these magnets create magnetic fluxes in opposite directions.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Permanent Magnet Type Synchronous Machine (AREA)
  • Electric Clocks (AREA)
  • Electromechanical Clocks (AREA)
EP96109810A 1995-06-27 1996-06-19 Générateur électrique pour pièce d'horlogerie Withdrawn EP0751445A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH187395 1995-06-27
CH1873/95 1995-06-27

Publications (1)

Publication Number Publication Date
EP0751445A1 true EP0751445A1 (fr) 1997-01-02

Family

ID=4220595

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96109810A Withdrawn EP0751445A1 (fr) 1995-06-27 1996-06-19 Générateur électrique pour pièce d'horlogerie

Country Status (3)

Country Link
EP (1) EP0751445A1 (ja)
JP (1) JPH09211152A (ja)
CN (1) CN1148752A (ja)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0990961A1 (en) * 1998-10-01 2000-04-05 Seiko Epson Corporation Electromagnetic transducer and electronic device including the transducer
US6124649A (en) * 1996-12-23 2000-09-26 Ronda Ag Micro-generator module and clockwork movement containing such a micro-generator
EP1099990A1 (fr) * 1999-11-12 2001-05-16 Asulab S.A. Génératrice pour pièce d'horlogerie
EP1109082A1 (fr) * 1999-12-07 2001-06-20 Asulab S.A. Génératrice notamment pour pièce d'horlogerie
EP1109083A1 (fr) * 1999-12-07 2001-06-20 Asulab S.A. Mouvement du type horloger équipé d'une génératrice
US6307274B1 (en) * 1999-10-14 2001-10-23 Leadtek Research Inc. Power generator for a digital cassette cartridge
US6603236B2 (en) 1998-01-22 2003-08-05 Seiko Epson Corporation Electronic timepiece
DE102005056941B3 (de) * 2005-11-29 2007-08-02 Hahn-Schickard-Gesellschaft für angewandte Forschung e.V. Vibrationswandler

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105814776B (zh) 2013-11-13 2018-12-21 包米勒公司 电动的驱动系统
CN106468875B (zh) * 2015-08-20 2020-05-19 比亚迪股份有限公司 用于智能手表的能量收集模组和智能手表
EP3982208B1 (fr) 2020-10-08 2023-05-03 The Swatch Group Research and Development Ltd Procede de fabrication d'une pluralite de generatrices adaptees a une application horlogere

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1811389U (de) 1959-09-15 1960-05-12 Junghans Geb Ag Schwungpendelgenerator fuer die aufladung von stromquellen in elektrischen kleinuhren.
US3800212A (en) * 1973-02-26 1974-03-26 Burroughs Corp Mechanical-to-electrical conversion system
CH597636B5 (ja) 1972-11-21 1978-04-14 Ebauches Sa
US4799003A (en) * 1987-05-28 1989-01-17 Tu Xuan M Mechanical-to-electrical energy converter
JPH03218245A (ja) * 1990-01-23 1991-09-25 Seiko Instr Inc 小型発電機
EP0665478A1 (fr) 1994-01-26 1995-08-02 Roberto Zafferri Montre électronique

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1811389U (de) 1959-09-15 1960-05-12 Junghans Geb Ag Schwungpendelgenerator fuer die aufladung von stromquellen in elektrischen kleinuhren.
CH597636B5 (ja) 1972-11-21 1978-04-14 Ebauches Sa
US3800212A (en) * 1973-02-26 1974-03-26 Burroughs Corp Mechanical-to-electrical conversion system
US4799003A (en) * 1987-05-28 1989-01-17 Tu Xuan M Mechanical-to-electrical energy converter
JPH03218245A (ja) * 1990-01-23 1991-09-25 Seiko Instr Inc 小型発電機
EP0665478A1 (fr) 1994-01-26 1995-08-02 Roberto Zafferri Montre électronique

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
K.SCHUELER, K.BRINKMANN: "DAUERMAGNETE, WERKSTOFFE & ANWENDUNGEN", part 9 1970, SPRINGER-VERLAG, BERLIN, article "Elektrische Uhren mit Dauermagneten", pages: 428 - 439
PATENT ABSTRACTS OF JAPAN vol. 15, no. 502 (E - 502) 18 December 1991 (1991-12-18) *

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6124649A (en) * 1996-12-23 2000-09-26 Ronda Ag Micro-generator module and clockwork movement containing such a micro-generator
KR100547250B1 (ko) * 1996-12-23 2006-03-23 리치몬트 인터내셔날 에스.에이. 마이크로발전기와모듈과마이크로발전기를포함하는시계장치작동기구
US6603236B2 (en) 1998-01-22 2003-08-05 Seiko Epson Corporation Electronic timepiece
US6208055B1 (en) 1998-10-01 2001-03-27 Seiko Epson Corporation Electromagnetic transducer and electronic device including the transducer
EP0990961A1 (en) * 1998-10-01 2000-04-05 Seiko Epson Corporation Electromagnetic transducer and electronic device including the transducer
US6307274B1 (en) * 1999-10-14 2001-10-23 Leadtek Research Inc. Power generator for a digital cassette cartridge
EP1099990A1 (fr) * 1999-11-12 2001-05-16 Asulab S.A. Génératrice pour pièce d'horlogerie
US6570824B1 (en) 1999-11-12 2003-05-27 Asulab S.A. Generator for a timepiece
US6381198B1 (en) 1999-12-07 2002-04-30 Asulab S.A. Clockwork movement fitted with a generator
US6469959B1 (en) 1999-12-07 2002-10-22 Asulab S.A. Generator in particular for a timepiece
EP1109083A1 (fr) * 1999-12-07 2001-06-20 Asulab S.A. Mouvement du type horloger équipé d'une génératrice
EP1109082A1 (fr) * 1999-12-07 2001-06-20 Asulab S.A. Génératrice notamment pour pièce d'horlogerie
DE102005056941B3 (de) * 2005-11-29 2007-08-02 Hahn-Schickard-Gesellschaft für angewandte Forschung e.V. Vibrationswandler

Also Published As

Publication number Publication date
CN1148752A (zh) 1997-04-30
JPH09211152A (ja) 1997-08-15

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