EP0119223A1 - Portable mini ac generator/dc accumulator for a mini power capacity - Google Patents

Portable mini ac generator/dc accumulator for a mini power capacity

Info

Publication number
EP0119223A1
EP0119223A1 EP19830902826 EP83902826A EP0119223A1 EP 0119223 A1 EP0119223 A1 EP 0119223A1 EP 19830902826 EP19830902826 EP 19830902826 EP 83902826 A EP83902826 A EP 83902826A EP 0119223 A1 EP0119223 A1 EP 0119223A1
Authority
EP
European Patent Office
Prior art keywords
generator
mini
accumulator
permanent magnet
rotor
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Withdrawn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
EP19830902826
Other languages
German (de)
French (fr)
Inventor
Petrus Matheus Josephus Knapen
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP0119223A1 publication Critical patent/EP0119223A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
    • A61N1/00—Electrotherapy; Circuits therefor
    • A61N1/18—Applying electric currents by contact electrodes
    • A61N1/32—Applying electric currents by contact electrodes alternating or intermittent currents
    • A61N1/36—Applying electric currents by contact electrodes alternating or intermittent currents for stimulation
    • A61N1/372—Arrangements in connection with the implantation of stimulators
    • A61N1/378—Electrical supply
    • A61N1/3785—Electrical supply generated by biological activity or substance, e.g. body movement
    • G—PHYSICS
    • G04—HOROLOGY
    • G04C—ELECTROMECHANICAL CLOCKS OR WATCHES
    • G04C10/00—Arrangements of electric power supplies in time pieces
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K35/00—Generators with reciprocating, oscillating or vibrating coil system, magnet, armature or other part of the magnetic circuit
    • H02K35/02—Generators with reciprocating, oscillating or vibrating coil system, magnet, armature or other part of the magnetic circuit with moving magnets and stationary coil systems

Definitions

  • Portable mini AC generator/DC accumulator for a mini power capacity Portable mini AC generator/DC accumulator for a mini power capacity.
  • the invention relates to a portable mini AC generator/DC accumulator for a mini power capacity as used e.g. for e wrist, a pocket or s necklace watch, a pacemaker or a battery powered hearing-aid, in which, under the influence of the individual movement of the bearer, a mass inertia or a rotor, set into motion with respect, to a stator not moving simultaneously therewith, and under the application of the pricipal of generating magnetic induction ' currents and via a rectifier known per se, transferring a mini AC into a mini DC, servicing the purpose of supplying directly or temporarily accumula ⁇ ting respectively a mini current.
  • a portable mini AC generator/DC accumulator for a mini power capacity as used e.g. for e wrist, a pocket or s necklace watch, a pacemaker or a battery powered hearing-aid, in which, under the influence of the individual movement of the bearer, a mass inertia or a rotor, set into motion with respect
  • a mini AC generator/DC accumulator contains a mutually cooperating selective magnetic system of a rotor and a stator, provided with a permanent magnet having at least 4 poles.
  • a lithiumcell can be applied, which by its characteristic prevents a discharge of the accumulator.
  • the main problem is to generate a sufficiently powerfull and high grade magnetic field and thus the required high voltage remaining within the res- tricted available space.
  • Supreme material for permanent magnets is extremely expensive.
  • material costs are less decisive for the ultimate price, so that for the mini generator/accumulator of the invention successivefull use can be made of a permanent magnet of the samarium-cobalt type pereformed in its isotropic or anisotropic version.
  • resins plastic bonded material
  • Even a disadvantage of less magnetic field strength can be compensated by the greater freedom of design engineering. This also makes it possible to apply a permanent mag ⁇ net with radial or axial magnetisation for the rotor/stat ⁇ r.
  • Fig. 1 shows the schematic drawing ⁇ f a selfloading quartz generator watch.
  • Fig. 2 shows perspectively a similar watch in which the invention is embodied.
  • Fig. 3 is a modified version according to Fig. 3 of a quartz generator watch.
  • Fig. 4-9 each show various embodiments of the construction of the generator/ accumulator in a top view and in a vertical cross section respectively;
  • Fig. 10 is a cross se tion of a permanent magnet.
  • a quartz generator watch 1 is powered by an accumulator 2.
  • This mini accumulator is charged by a mini
  • the watch 1 is, by resorption of kinetic energy provided by its bearer powered by the mini generator/accu ⁇ mulator, no battery replacement being required and thereby enjoying the advantages of the invention.
  • Fig. 2 and 3 various parts of a quartz generator watch according to the scheme of Fig. 1 can be found back.
  • the usual parts of the analog quartz watch consist of the battery 7, the oscillating circuit with quarz crystal 8, the coil 9 of the step by step motor 10 with its rotor.
  • the watch is provided with a rotor 11 and a stator 12 and on the rotor 11 there are mounted a number of permanent magnets 13, which magnets also provide for the mass inertia causing the rotor 1 1 to be brought out of balance.
  • the way of generating energy shall not be discussed hereinafter since this is supposed to be known.
  • a rotor can also in it self be selectively become magnetised and the stator instead of containing a single coil, can consists of a number of self inductions or otherwise be made of a self inductive element.
  • the stator instead of containing a single coil, can consists of a number of self inductions or otherwise be made of a self inductive element.
  • the rotor is selectively magnetic and the stator is selectively inductive or reversely, it is only necessary to take the generated current away to the accumulator 7 via the rectifier ccircuit, see Fig. 1.
  • To generate a mini power, caused by the bearer's kinetic energy, in stead of a rotating movement also an alternating movement can be used, in the plane of the rotor but also perpendicular thereto.
  • Fig. 3 shows a perpective view of another quatrs generator watch, the shape of the generator rotor 14 being different whereas the accumulator 15 and the combined rectifier circuit/voltage regulator/discharge protection 16 are shown as a single unit. From the difference in design between the genera ⁇ tor 1 1 and 14 some freedom in design is apparent, this being the result of the application of permanent magnets of the samarium-cobalt type in its isotropic or anisotropic version. It appears that this material is highly suitable for the mini power aimed at, despite its relatively high price, in combination with the advantages already discussed before.
  • Figs. 4-9 there are shown some constructional embodiments of the mini generator making it possible to provide for a loose unit having minimum and optimal dimensions respectively.
  • a stator 17 with an induction coil 18 and a permanent magnet 19 of samarium-cobalt have been applied, together with a rotor 20 which is turnable around a fixed shaft 21.
  • the embodiments shown in the Figs enable to give the complete loose unit for use in a quartz watch a minimum thickness of 1,5 mm with a diameter of 5mm and having a thickness of at most 4 mm with a diameter of 11 ,5 mm.
  • Fig. 10 shows a possible embodiment in a cross section of a permanent magnet in the shape of an ellipsoide, having such an iron yoke, that magnetic satura ⁇ tion is just being prevented. This can e.g. be done by making the iron thicker at the critical points.
  • the permanent magnet 22 is surrounded fay the iron yoke 23 which provides for a cylindrical assembly.

Abstract

Mini-générateur à courant alternatif/accumulateur à courant continu portatif pour une mini-capacité de puissance pour une montre bracelet, une montre de poche ou une montre-pendentif, un stimulateur cardiaque ou un appareil de prothèse auditive alimenté par une batterie, où sous l'influence du mouvement individuel de la personne qui le porte, une inertie de masse ou rotor (20) est mis en mouvement par rapport à un stator (18) ne se déplaçant pas simultanément avec le rotor et, par application du principe des courants d'induction magnétique et par l'intermédiaire d'un redresseur connu en soi, un mini-courant continu est généré et sert à alimenter directement ou à accumuler temporairement un mini-courant. Etant donné qu'un mini-dispositif présente un espace très limité pour y loger un mini-générateur/accumulateur et que néanmoins il faut générer un courant de charge suffisant, ces contraintes affectent considérablement d'une part sa forme et d'autre part son prix de revient. Le samarium-cobalt est un matériau très approprié pour un aimant permanent, peut s'appliquer dans une version isotropique et anisotropique à condition que l'aimant soit exécuté avec quatre pôles au moins. Spécialement, l'application est intéressante dans une montre à quartz utilisant un aimant ayant quatre pôles ou davantage d'un aimant permanent du type samarium-cobalt, pourvu d'une culasse en fer avec des pôles à griffes. Cependant, l'utilisation d'un aimant permanent (22) ayant une forme ellipsoïde avec une culasse en fer (23), ayant comme résultat un assemblage cylindrique, peut également être préférée. Une unité amovible comprenant le générateur/accumulateur pouvant être montée dans une montre à quartz peut être fabriquée grâce à l'invention, avec une épaisseur minimum de 1,5 mm et un diamètre minimum de 5 mm.Mini AC generator / portable DC accumulator for mini power capacity for a wristwatch, pocket watch or pendant watch, pacemaker or battery powered hearing aid, where under the influence of the individual movement of the person wearing it, a mass inertia or rotor (20) is set in motion relative to a stator (18) not moving simultaneously with the rotor and, by application of the principle of currents magnetic induction and through a rectifier known per se, a DC mini-current is generated and is used to directly feed or temporarily accumulate a mini-current. Since a mini-device has a very limited space for accommodating a mini-generator / accumulator there and nevertheless it is necessary to generate a sufficient charge current, these constraints considerably affect on the one hand its shape and on the other hand its cost price. The samarium-cobalt is a very suitable material for a permanent magnet, can be applied in an isotropic and anisotropic version provided that the magnet is executed with at least four poles. In particular, the application is interesting in a quartz watch using a magnet having four or more poles of a permanent magnet of the samarium-cobalt type, provided with an iron cylinder head with claw poles. However, the use of a permanent magnet (22) having an ellipsoid shape with an iron yoke (23), resulting in a cylindrical assembly, may also be preferred. A removable unit comprising the generator / accumulator which can be mounted in a quartz watch can be manufactured thanks to the invention, with a minimum thickness of 1.5 mm and a minimum diameter of 5 mm.

Description

Portable mini AC generator/DC accumulator for a mini power capacity.
The invention relates to a portable mini AC generator/DC accumulator for a mini power capacity as used e.g. for e wrist, a pocket or s necklace watch, a pacemaker or a battery powered hearing-aid, in which, under the influence of the individual movement of the bearer, a mass inertia or a rotor, set into motion with respect, to a stator not moving simultaneously therewith, and under the application of the pricipal of generating magnetic induction ' currents and via a rectifier known per se, transferring a mini AC into a mini DC, servicing the purpose of supplying directly or temporarily accumula¬ ting respectively a mini current. There is a growing need for stopping the replacement of batteries in a battery powered mini equipment, such as for a watch or a pacemaker. At the most inconvenient moments a battery is exhausted and it is even sooner replaced than is strictly necessary just to avoid the risk of being empty e.g. for a pacemaker.
It is the purpose of the invention while using means known per se, to provide for for the generation and accumulation respectively of a mini power capaci¬ ty, no longer depending upon repiaceble mini battery cells such as from Hg batteries, Li batteries or Ni batteries.
According to the invention this is achieved in that a mini AC generator/DC accumulator contains a mutually cooperating selective magnetic system of a rotor and a stator, provided with a permanent magnet having at least 4 poles.
Extensive researches which were carried out by the Technological University of Eindhoven, Electrotechnics Department, Section of Electromechanics and Power electronics, have shown the above requirements for a mini genera¬ tor/accumulator to be used for a quartz generator watch. According to the invention there is further a need to connect the rectifier to a discharge protection for the accumulator in order to prevent an inadmissible discharge, caused e.g. if the watch is not used for a longer duration, comparable with a lack of movement impulses.
In a preferred embodiment of the invention a lithiumcell can be applied, which by its characteristic prevents a discharge of the accumulator.
The main problem is to generate a sufficiently powerfull and high grade magnetic field and thus the required high voltage remaining within the res- tricted available space. Supreme material for permanent magnets is extremely expensive. For mini-use however material costs are less decisive for the ultimate price, so that for the mini generator/accumulator of the invention succesfull use can be made of a permanent magnet of the samarium-cobalt type pereformed in its isotropic or anisotropic version. Where samarium-cobalt can be mixed with resins (plastic bonded material), even a disadvantage of less magnetic field strength can be compensated by the greater freedom of design engineering. This also makes it possible to apply a permanent mag¬ net with radial or axial magnetisation for the rotor/statαr.
Calculations and research show that a very effective embodiment of the generator/ accumulator is achieved if the abovementioπed permanent magnet is circumferentially provided with an iron yoke having claw poles. Under such circumstances there are no restrictions for the magnet material and the best available quality of samarium-cobalt can be chosen. According to the invention a very favourable embodiment of a permanent magnet is effec- ted by an ellipsoide, being provided with an iron yoke that a cylindrical assembly is obtained. By this choice it can be expected that the magnetic saturation, which otherwise would be caused at critical points, does not occur.
Since the available space for a battery in existing watches becomes now available for the generator/accumulator of the invention, a loose unit appears to be most effective. Specifically for a quartz watch the sizes of the unit must measure between a thickness of at least 1.5 mm and at most 4 mm, whereas the diameter will be between 5mm and 11.5 mm at the most.
The invention will be explained by means of the drawing of a quartz watch with its parts.
Fig. 1 shows the schematic drawing αf a selfloading quartz generator watch.
Fig. 2 shows perspectively a similar watch in which the invention is embodied.
Fig. 3 is a modified version according to Fig. 3 of a quartz generator watch.
Fig. 4-9 each show various embodiments of the construction of the generator/ accumulator in a top view and in a vertical cross section respectively;
Fig. 10 is a cross se tion of a permanent magnet.
In Fig. 1, the principle is shown in which a quartz generator watch 1 is powered by an accumulator 2. This mini accumulator is charged by a mini
DC generator 3 which converts kinetic energy into electric energy and by meihs of a rectifierblock 4, a voltage regulates 5 and a discharge protection 6 a mini DC is given to the accumulator 2. The watch 1 is, by resorption of kinetic energy provided by its bearer powered by the mini generator/accu¬ mulator, no battery replacement being required and thereby enjoying the advantages of the invention.
In Fig. 2 and 3 various parts of a quartz generator watch according to the scheme of Fig. 1 can be found back. The usual parts of the analog quartz watch consist of the battery 7, the oscillating circuit with quarz crystal 8, the coil 9 of the step by step motor 10 with its rotor. Further the watch is provided with a rotor 11 and a stator 12 and on the rotor 11 there are mounted a number of permanent magnets 13, which magnets also provide for the mass inertia causing the rotor 1 1 to be brought out of balance. The way of generating energy shall not be discussed hereinafter since this is supposed to be known.
While in Fig. 2 the rotor 1 1 is provided with permanent magnets 13, a rotor can also in it self be selectively become magnetised and the stator instead of containing a single coil, can consists of a number of self inductions or otherwise be made of a self inductive element. For the application of the invention it makes no difference if the rotor is selectively magnetic and the stator is selectively inductive or reversely, it is only necessary to take the generated current away to the accumulator 7 via the rectifier ccircuit, see Fig. 1. To generate a mini power, caused by the bearer's kinetic energy, in stead of a rotating movement also an alternating movement can be used, in the plane of the rotor but also perpendicular thereto.
Fig. 3 shows a perpective view of another quatrs generator watch, the shape of the generator rotor 14 being different whereas the accumulator 15 and the combined rectifier circuit/voltage regulator/discharge protection 16 are shown as a single unit. From the difference in design between the genera¬ tor 1 1 and 14 some freedom in design is apparent, this being the result of the application of permanent magnets of the samarium-cobalt type in its isotropic or anisotropic version. It appears that this material is highly suitable for the mini power aimed at, despite its relatively high price, in combination with the advantages already discussed before.
In Figs. 4-9 there are shown some constructional embodiments of the mini generator making it possible to provide for a loose unit having minimum and optimal dimensions respectively.
OMPI - In various design embodiments a stator 17 with an induction coil 18 and a permanent magnet 19 of samarium-cobalt have been applied, together with a rotor 20 which is turnable around a fixed shaft 21. The embodiments shown in the Figs, enable to give the complete loose unit for use in a quartz watch a minimum thickness of 1,5 mm with a diameter of 5mm and having a thickness of at most 4 mm with a diameter of 11 ,5 mm.
This makes it possible to build the individual unit in existing battery powered watches.
The already mentioned researches and calculations show how optimal results are obtained while using permanent magnets with at least 4 poles, whereby, depending on the constructional choice, use can be made of radial or axial magnetisation.
It also appeared that preference may be given to a permanent magnet, provi¬ ded with at least 4 poles, circumferentially provided with an iron yoke having claw poles.
Fig. 10 shows a possible embodiment in a cross section of a permanent magnet in the shape of an ellipsoide, having such an iron yoke, that magnetic satura¬ tion is just being prevented. This can e.g. be done by making the iron thicker at the critical points. In Fig. 10 the permanent magnet 22 is surrounded fay the iron yoke 23 which provides for a cylindrical assembly.
It appears to be very well possible to produce the unit referred to for an attractive price which is lower than the price of a replaced battery. Surely for use with a pacemaker the advantages with the generating mini power are more remarkable and also while applying this for hearing-aids, etc., total independency exists with respect to replacement batteries.
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O P
Y IP

Claims

- PATENT CLAIMS
1. A portable mini AC generator/DC accumulator for mini power capacity, such as e.g. in use for a wrist, pocket or necklace watch, a pacemaker or a battery powered hearing-aid, in which, under the influence of the individual movement of its bearer, a mass inertia or rotor, set into motion with respect to a stator, not moving simultaneously therewith, and under the application of the principle of generating magnetic induction currents and via a rectifier known per se, transferring a mini AC into a mini DC, servicing the purpose of supplying or temporarily accumulating respectively a mini current, characte¬ rized in that the generator/ accumulator consists of a mutually cooperating selective magnetic system of a rotor and a stator, provided with a permanent magnet, having at least 4 poles.
2. Generator/accumulator according to claim 1, characterized in that the rectifier is connected to a discharge protection for the accumulator.
3. Generator/accumulator according to claim 1, characterized in that a lithi- umcell is used as a discharge protection.
4. Generator/accumulator according to claim 1, characterized in that a perma¬ nent magnet is used of the type samarium-cobalt in an isotropic or anisotropic version.
5. Generator/accumulator according to claim 4, characterized in that the rotor/stator assembly contains a permanent magnet provided with an axial magnetisation.
6. Generator/accumulator according to claim 4, characterized in that the rotor/stator assembly contains a permanent magnet provided with a radial magnetisation.
7. Generator/accumulator azccording to one of the claims 1 and 4-6, characte¬ rized in that a permanent magnet of the samarium-cobalt type having at least 4 poles along its circumference, is provided with an iron yoke having claw poles.
8. Generator/accumulator according to one of the claims 1 and 4-6, characteri- zed in that the permanent magnet has the shape of an ellipsofde with such an iron yoke, that a cilindrical assembly is created.
9. Generator/accumulator according to one of the preceding claims, characteri¬ zed in that the assembly of rotor/stator consists of a separate loose unit.
10. Generator/ accumulator according to claim 9, characterized in that the loose unit to be used for a quartz watch has a thickness between at least 1,5 mm and no more than 4 mm and having a diameter of at least 5 mm and no more than 11,5 mm.
OMP
EP19830902826 1982-09-03 1983-09-02 Portable mini ac generator/dc accumulator for a mini power capacity Withdrawn EP0119223A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL8203443 1982-09-03
NL8203443A NL8203443A (en) 1982-09-03 1982-09-03 PORTABLE, BATTERY-POWERED DEVICE, IN PARTICULAR A BRACELET OR WRIST WATCH, WHOSE BATTERY IS KEPT IN CHARGED CONDITION WHEN CHARGED.

Publications (1)

Publication Number Publication Date
EP0119223A1 true EP0119223A1 (en) 1984-09-26

Family

ID=19840221

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19830902826 Withdrawn EP0119223A1 (en) 1982-09-03 1983-09-02 Portable mini ac generator/dc accumulator for a mini power capacity

Country Status (3)

Country Link
EP (1) EP0119223A1 (en)
NL (1) NL8203443A (en)
WO (1) WO1984001041A1 (en)

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JP2000175391A (en) 1998-10-01 2000-06-23 Seiko Epson Corp Electromagnetic conversion device and electronic equipment therewith
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GB2354646A (en) * 1999-09-22 2001-03-28 John Fagbola Battery housed kinetic generator
TW452776B (en) * 1999-10-14 2001-09-01 Leadtek Research Inc Power generating apparatus for electronic recording tape
FR2839823B1 (en) * 2002-05-14 2004-07-02 Pierre Cibie PORTABLE INSTRUMENT BATTERY POWER GENERATOR SUCH AS A PORTABLE TELEPHONE
US20040073267A1 (en) * 2002-10-09 2004-04-15 Asher Holzer Micro-generator implant
US20100331974A1 (en) * 2009-06-26 2010-12-30 Schaper Jr Dale Thomas Intraocular Kinetic Power Generator
JP2012070535A (en) * 2010-09-24 2012-04-05 Toshiba Corp Thin vibration power generation device
NL2024644B1 (en) * 2020-01-10 2021-09-07 Kinetron Bv Micro-power generator suitable for an electronic device, electronic device comprising such a micro-power generator

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Also Published As

Publication number Publication date
NL8203443A (en) 1984-04-02
WO1984001041A1 (en) 1984-03-15

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