EP0208986B1 - Mittels Solarzellen betriebenes elektrisches Kleingerät, insbesondere Solaruhr - Google Patents

Mittels Solarzellen betriebenes elektrisches Kleingerät, insbesondere Solaruhr Download PDF

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Publication number
EP0208986B1
EP0208986B1 EP86108969A EP86108969A EP0208986B1 EP 0208986 B1 EP0208986 B1 EP 0208986B1 EP 86108969 A EP86108969 A EP 86108969A EP 86108969 A EP86108969 A EP 86108969A EP 0208986 B1 EP0208986 B1 EP 0208986B1
Authority
EP
European Patent Office
Prior art keywords
circuit
voltage
threshold
solar cells
switch
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
EP86108969A
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German (de)
English (en)
French (fr)
Other versions
EP0208986A1 (de
Inventor
Wolfgang Ganter
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.)
Junghans Uhren GmbH
Original Assignee
Junghans Uhren 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 Junghans Uhren GmbH filed Critical Junghans Uhren GmbH
Priority to AT86108969T priority Critical patent/ATE43019T1/de
Publication of EP0208986A1 publication Critical patent/EP0208986A1/de
Application granted granted Critical
Publication of EP0208986B1 publication Critical patent/EP0208986B1/de
Expired legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G04—HOROLOGY
    • G04C—ELECTROMECHANICAL CLOCKS OR WATCHES
    • G04C10/00—Arrangements of electric power supplies in time pieces
    • G04C10/02—Arrangements of electric power supplies in time pieces the power supply being a radioactive or photovoltaic source
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S136/00—Batteries: thermoelectric and photoelectric
    • Y10S136/291—Applications
    • Y10S136/293—Circuits

Definitions

  • the invention relates to a circuit arrangement according to the preamble of claim 1.
  • Such a circuit arrangement is known from the article VA 1 "NO BATTERY” ANALOG QUARTZ WATCH, pages 75 to 79 in report volume No. 2 of the XI. International Congress for Chronometry (October 1984, Besanqon), there Fig. 13.
  • a small auxiliary capacitor is provided which is directly connected to the clock circuit the solar cell is connected in parallel via a flyback blocking diode. This is intended to ensure that, due to the low time constant of the small capacity, the clock starts after short-term irradiation of the solar cell.
  • EP-A2-0 090 330 also provides staggered operation with two power levels, in that an operation with a higher power requirement is carried out when the storage voltage drops, in order to then switch to a low-power waiting state until the storage is sufficiently recharged. This suggests that even when the circuit arrangement is started up with an initially unloaded memory, the regular operation of all components - regardless of whether the power requirement is low or high - does not begin.
  • a circuit arrangement similar to that in the above-mentioned congress report, i.e. with a small start-up auxiliary memory and a large permanent operating memory, is also known from US-A-4,434,395, where it has the special feature that the main memory is only and only if the radiation intensity of the solar cells is sufficient to start-up auxiliary storage.
  • a disadvantage of such circuit arrangements with a start-up auxiliary memory is, however, in particular the price and the space required for additional installation of the much larger main memory. From an operational point of view, it is also a particular disadvantage that the auxiliary memory has a very small capacity in order to be able to be quickly charged to the starting voltage of the device.
  • the result is that the operation of the small device (which is used after a short irradiation time) ceases again immediately, namely when e.g. B. the radiation only lasted briefly or is not sufficient to maintain the state of charge under load. If a consumer has made sure, for example, by switching on a room lighting that his small device, such as a solar watch, has started up, he can by no means be sure that this device will continue to run for the rest of the night, for example, if he then switches off the room lighting again .
  • Such unfavorable load conditions are given when a device is started up, in particular if it is, for example, a radio clock; if, at the start of operation, there is an increased power requirement for the operation of the radio receiver (and its decoding circuit for the received time information), as well as for the rapid drive of the gear train as the clock hands retract into their reference position.
  • Similar unfavorable operating conditions in particular immediately after the start-up of a device, exist when decorative elements such as ornamental pendulums, fidget figures or the like that are still at rest have to be set in motion from the movement, especially when an electromotive converter is provided, the high starting current of which, for example, only after insertion a rotor movement is reduced by the induction effects on stationary operating requirements.
  • the initially increased power requirement can result in the state of charge of the memory not even reaching the voltage value that is necessary for the permanent correct operation of all of the circuit components; so that a free start from the unloaded memory situation is not guaranteed.
  • the invention has for its object to provide a circuit arrangement of the generic type, in which a reliable start in the stationary mode of operation is ensured even in the case of circuit components with different starting voltages, and in particular when there is a high electrical load, particularly at the start of operation.
  • a load on the memory at the start of operation is temporarily prevented via the threshold circuit; so that practically all of the electrical energy supplied by the solar cell is available for storage charging, with the result of a rapid rise in the voltage above the minimum operating value. Only then does the threshold circuit release the memory load from consumers, which now function simultaneously, regardless of their different minimum operating voltages caused by circuitry; with which the proper stationary interaction of all circuit components is ensured even if increased loads occur at the start of operation and the storage voltage does not temporarily increase or even decrease again.
  • the threshold circuit does not switch off again if the switch-on voltage falls below once.
  • the power requirement is generally lower; for example due to the pointer of a radio-controlled clock that has already been swung into the desired position or due to the kinetic energy of construction parts that have already been set in motion.
  • the cut-off voltage of the threshold circuit can thus be selected to be significantly lower than the cut-in voltage, as a result of which an interruption in operation due to temporary voltage drops in the memory is practically prevented.
  • the threshold value circuit is expediently not connected directly but only functionally in series with power consumers; So designed as a control stage, the switch-on or Ausatt-control signals from the relevant circuit parts. This avoids power losses that could otherwise occur when supplying larger consumers via auxiliary circuits. It then only has to be ensured that the control circuits for such consumers initially block at the start of operation and only connect the consumer to the supply when the threshold circuit has determined that the switch-on voltage has been exceeded.
  • the solar watch 1 shown as the small device has a clockwork 2, which is preferably electromechanical, which is fed from at least one solar cell 4 via a starting circuit 3; with parallel connection of a charge storage device 5 for the provision of bridging electrical energy for periods in which the excitation of the solar cell 4 with radiation energy 6 is interrupted for short to medium periods due to the environment.
  • a clockwork 2 which is preferably electromechanical, which is fed from at least one solar cell 4 via a starting circuit 3; with parallel connection of a charge storage device 5 for the provision of bridging electrical energy for periods in which the excitation of the solar cell 4 with radiation energy 6 is interrupted for short to medium periods due to the environment.
  • the clockwork 2 has an electromechanical transducer, e.g. B. a stepping motor 7, which is connected via at least one gear coupling 8 to movement elements 9 such as pointers, decorative pendulums, figures, directional antennas, mechanical striking mechanisms or the like, which experience their mechanical drive from the operation of the motor 7.
  • the motor 7 draws its operating energy via a control circuit 10 (for example a pole reversing bridge circuit in the case of a single-phase stepper motor) as directly as possible from the power source in the form of the solar cell 4 (or the auxiliary power source in the form of the charge store 5) in order to avoid losses in it Power path to avoid switched on electrical components if possible.
  • a control circuit 10 for example a pole reversing bridge circuit in the case of a single-phase stepper motor
  • the control circuit 10 is controlled from an operating circuit 11, which in particular can be a quartz-stabilized, ie time-keeping electronic clock circuit.
  • an additional circuit 12 as indicated by dashed lines in the drawing; this is in particular, for example, a radio clock receiver and decoder, as described in more detail in the older application according to EP-A2-0 180 155.
  • the memory 5 When the solar clock 1 is to be put into operation for the first time, the memory 5 is not yet loaded. Electrical charge caused by the radiation energy 6 leads via the supply lines 13 to an exponential increase in the voltage U over time t because of the large capacity of the directly connected memory 5, as outlined in the drawing for the circuit 14 which is parallel to the capacitive memory 5.
  • the response ranges of the different consumers connected to the supply lines 13 are relatively different; with the result that different consumers become effective at different times during the rise in the voltage U and then at least delay the rise in the voltage U, possibly by preventing the increase in energy demand and even being able to reverse it.
  • the result of this is that consumers which have the highest response voltage for their correct mode of operation or the greatest starting power requirement may not reach a regular operating state at all, and thus a stable mode of operation of the solar clock 1 as a whole can never be achieved.
  • the threshold circuit 14 is preferably even equipped with a switch-off hysteresis, that is to say with a switch-off response voltage 0 which is below the potential of the switch-on voltage I; which ensures that even a certain drop in the supply voltage U does not yet lead to the interruption of the operation just started. It can also be provided - as shown in the drawing by a plurality of control lines 15 to take into account different switch-on or switch-off voltages 1/0 within the threshold circuit 14 for consumers or consumer groups which are very different in terms of their electrical operating behavior, and accordingly these consumers function naturally with those which appear independently of one another coordinated) to release or block control signals 16.
  • control signals 16 supplied by the threshold circuit 14 ensure that the supply lines 13 can only be loaded when the charging voltage U of the memory 5 is sufficient for proper operation and sufficient long-term stable operation because the switch-on voltage 1 has already been exceeded and a switch-off voltage 0 is not yet is again below - with the desired result that a tilting swing operation of the electrical consumers when using larger power requirements and thus a suppression properly used Operation of the device as a whole is safely avoided.
  • the function of the threshold circuit 14 does not require a voltage limiter between the solar cell 4 and the bridging memory 5, it is advantageous in this respect that the full voltage obtained from the radiation series 6, which goes into the square of the energy balance, for the operation of the consumers (circuits and other, for example electromechanical components) is available.
  • a current limiting circuit 17 in series with such consumers, the mode of operation of which depends heavily on the energy content of the control signals; as in the case of a stepping motor 7, the stepping torque of which drops sharply with both smaller and larger motor pulse voltages.
  • the circuit 17 need not be designed as a power constant for optimizing the motor operation, but only for current limitation in the motor control; what can be realized with a component with a constant current characteristic (for example realized by a transistor) with little circuitry complexity.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electromechanical Clocks (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Direct Current Feeding And Distribution (AREA)
EP86108969A 1985-07-06 1986-07-02 Mittels Solarzellen betriebenes elektrisches Kleingerät, insbesondere Solaruhr Expired EP0208986B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86108969T ATE43019T1 (de) 1985-07-06 1986-07-02 Mittels solarzellen betriebenes elektrisches kleingeraet, insbesondere solaruhr.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19853524290 DE3524290A1 (de) 1985-07-06 1985-07-06 Mittels solarzellen betriebenes elektrisches kleingeraet, insbesondere solaruhr
DE3524290 1985-07-06

Publications (2)

Publication Number Publication Date
EP0208986A1 EP0208986A1 (de) 1987-01-21
EP0208986B1 true EP0208986B1 (de) 1989-05-10

Family

ID=6275188

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86108969A Expired EP0208986B1 (de) 1985-07-06 1986-07-02 Mittels Solarzellen betriebenes elektrisches Kleingerät, insbesondere Solaruhr

Country Status (7)

Country Link
US (1) US4714352A (enrdf_load_stackoverflow)
EP (1) EP0208986B1 (enrdf_load_stackoverflow)
JP (1) JPS6237027A (enrdf_load_stackoverflow)
AT (1) ATE43019T1 (enrdf_load_stackoverflow)
DE (2) DE3524290A1 (enrdf_load_stackoverflow)
HK (1) HK84290A (enrdf_load_stackoverflow)
SG (1) SG74489G (enrdf_load_stackoverflow)

Families Citing this family (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2149942B (en) * 1983-11-21 1987-03-04 Shiojiri Kogyo Kk Electronic timepiece
DE8718063U1 (de) * 1987-03-11 1993-03-25 Junghans Uhren GmbH, 7230 Schramberg Autonome Funkuhr
US4959603A (en) * 1987-10-27 1990-09-25 Osaka Titanium Co., Ltd. Solar battery equipment
GB2211679A (en) * 1987-10-27 1989-07-05 Eric Paul Paterson Solar powered current supply circuit
GB2225500A (en) * 1988-10-19 1990-05-30 Sanyo Electric Co Electric motor for operating a fan
JP2937287B2 (ja) * 1992-09-22 1999-08-23 国際ディスプレイ工業株式会社 揺動意匠体の自己起動する揺動装置
US5519295A (en) * 1994-04-06 1996-05-21 Honeywell Inc. Electrically operated actuator having a capacitor storing energy for returning the actuator to a preferred position upon power failure
US5514223A (en) * 1995-02-17 1996-05-07 United Solar Systems Corporation Dual discharge photovoltaic module
EP0982637A1 (en) * 1995-09-26 2000-03-01 Citizen Watch Co. Ltd. Electronic watch
JP3726852B2 (ja) * 1996-11-22 2005-12-14 セイコーエプソン株式会社 時計装置
JP3963554B2 (ja) * 1997-06-17 2007-08-22 セイコーエプソン株式会社 電子機器、時計および電子機器の消費電力制御方法
DE29718454U1 (de) * 1997-10-17 1999-02-11 Junghans Uhren Gmbh, 78713 Schramberg Solarbetriebene Funkuhr
EP0952500B1 (en) * 1997-11-20 2006-12-27 Seiko Epson Corporation Electronic device and method for controlling electronic device
JP2973303B2 (ja) * 1998-02-05 1999-11-08 セイコーインスツルメンツ株式会社 電波修正時計
US6466519B1 (en) * 1998-12-04 2002-10-15 Seiko Epson Corporation Electronic device, electronic timepiece and power control method
ES2514440T3 (es) 1999-10-18 2014-10-28 William W. French Dispositivo esférico de visualización auto-rotatorio
DE10132811A1 (de) * 2001-07-06 2003-01-23 Enocean Gmbh Spannungsgenerator für Halbleiterschaltungen
US20080121947A1 (en) * 2006-09-14 2008-05-29 Robert Eugene Frahm Solar-powered MEMS acoustic sensor and system for providing physical security in a geographical area with use thereof
US20080258064A1 (en) * 2007-04-23 2008-10-23 Stephen Anthony Cima Radiation rate meter displaying remaining time parameters
JPWO2009136590A1 (ja) * 2008-05-07 2011-09-08 日本電気株式会社 電源装置
TW201134386A (en) * 2010-04-09 2011-10-16 Tung-Teh Lee Automatic water-supply control device

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0194136A2 (en) * 1985-03-05 1986-09-10 Seiko Instruments Inc. Electronic timepiece with a solar cell

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3955353A (en) * 1974-07-10 1976-05-11 Optel Corporation Direct current power converters employing digital techniques used in electronic timekeeping apparatus
GB1481024A (en) * 1974-07-15 1977-07-27 Suisse Horlogerie Battery powered electronic timepiece with voltage regulation
JPS51101478A (enrdf_load_stackoverflow) * 1975-03-04 1976-09-07 Suwa Seikosha Kk
FR2330180A1 (fr) * 1975-10-31 1977-05-27 Labo Electronique Physique Dispositif pour la transformation de l'energie solaire en energie motrice
DE2918064A1 (de) * 1978-05-08 1979-11-22 Ebauches Sa Vorrichtung zum laden eines akkumulators durch eine quelle elektrischer energie, insbesondere fuer eine elektronische uhr
JPS55166431A (en) * 1979-06-13 1980-12-25 Matsushita Electric Industrial Co Ltd Solar battery power supply device
AT375501B (de) * 1980-07-18 1984-08-10 Ludwig Ludin Schaltanordnung fuer einen pumpen-gleichstrommotor
US4434395A (en) * 1981-02-25 1984-02-28 Sharp Kabushiki Kaisha Solar cell power supply circuit
JPS57201882A (en) * 1981-06-08 1982-12-10 Seiko Epson Corp Solar battery timepiece
JPS58168122A (ja) * 1982-03-30 1983-10-04 Toshiba Corp 演算処理装置
JPS603578A (ja) * 1983-06-21 1985-01-09 Seiko Epson Corp 太陽電池付時計
JPH0792506B2 (ja) * 1984-11-21 1995-10-09 セイコーエプソン株式会社 電子時計
US4634953A (en) * 1984-04-27 1987-01-06 Casio Computer Co., Ltd. Electronic equipment with solar cell
JPS60249821A (ja) * 1984-05-23 1985-12-10 セイコーインスツルメンツ株式会社 充放電回路

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0194136A2 (en) * 1985-03-05 1986-09-10 Seiko Instruments Inc. Electronic timepiece with a solar cell

Also Published As

Publication number Publication date
SG74489G (en) 1990-04-20
HK84290A (en) 1990-10-25
DE3524290A1 (de) 1987-01-15
DE3663313D1 (en) 1989-06-15
JPS6237027A (ja) 1987-02-18
ATE43019T1 (de) 1989-05-15
DE3524290C2 (enrdf_load_stackoverflow) 1987-05-27
US4714352A (en) 1987-12-22
EP0208986A1 (de) 1987-01-21

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