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WO2009100981A1 - Chargeur à champ magnétique homogène - Google Patents

Chargeur à champ magnétique homogène Download PDF

Info

Publication number
WO2009100981A1
WO2009100981A1 PCT/EP2009/050884 EP2009050884W WO2009100981A1 WO 2009100981 A1 WO2009100981 A1 WO 2009100981A1 EP 2009050884 W EP2009050884 W EP 2009050884W WO 2009100981 A1 WO2009100981 A1 WO 2009100981A1
Authority
WO
WIPO (PCT)
Prior art keywords
magnetic
coil
magnetic element
air gap
hearing
Prior art date
Application number
PCT/EP2009/050884
Other languages
German (de)
English (en)
Inventor
Mihail Boguslavskij
Uwe Rass
Original Assignee
Siemens Medical Instruments Pte. Ltd.
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 Siemens Medical Instruments Pte. Ltd. filed Critical Siemens Medical Instruments Pte. Ltd.
Publication of WO2009100981A1 publication Critical patent/WO2009100981A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R25/00—Deaf-aid sets, i.e. electro-acoustic or electro-mechanical hearing aids; Electric tinnitus maskers providing an auditory perception
    • H04R25/55—Deaf-aid sets, i.e. electro-acoustic or electro-mechanical hearing aids; Electric tinnitus maskers providing an auditory perception using an external connection, either wireless or wired
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2225/00—Details of deaf aids covered by H04R25/00, not provided for in any of its subgroups
    • H04R2225/31—Aspects of the use of accumulators in hearing aids, e.g. rechargeable batteries or fuel cells
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2460/00—Details of hearing devices, i.e. of ear- or headphones covered by H04R1/10 or H04R5/033 but not provided for in any of their subgroups, or of hearing aids covered by H04R25/00 but not provided for in any of its subgroups
    • H04R2460/17—Hearing device specific tools used for storing or handling hearing devices or parts thereof, e.g. placement in the ear, replacement of cerumen barriers, repair, cleaning hearing devices

Definitions

  • the present invention relates to a charger for a
  • Hearing device for inductive charging with a magnetic element having a specific passage area for magnetic flux is understood here to mean any sound-emitting device which can be worn in or on the ear, in particular a hearing device, a headset, headphones and the like.
  • Hearing aids are portable hearing aids that are used to care for the hearing impaired.
  • different types of hearing aids such as behind-the-ear hearing aids (BTE), hearing aid with external receiver (RIC: receiver in the canal) and in-the-ear hearing aids (ITE), e.g. Concha hearing aids or canal hearing aids (ITE, CIC).
  • BTE behind-the-ear hearing aids
  • RIC hearing aid with external receiver
  • ITE in-the-ear hearing aids
  • ITE in-the-ear hearing aids
  • ITE in-the-ear hearing aids
  • ITE concha hearing aids or canal hearing aids
  • the hearing aids listed by way of example are worn on the outer ear or in the ear canal.
  • bone conduction hearing aids, implantable or vibrotactile hearing aids are also available on the market. The stimulation of the damaged hearing takes place either mechanically or electrically.
  • Hearing aids have in principle as essential components an input transducer, an amplifier and an output transducer.
  • the input transducer is usually a sound receiver, z. As a microphone, and / or an electromagnetic receiver, for. B. an induction coil.
  • the output transducer is usually used as an electroacoustic transducer, z. As miniature speaker, or as an electromechanical transducer, z. B. bone conduction, realized.
  • the amplifier is usually integrated in a signal processing unit. This basic structure is shown in FIG. 1 using the example of a behind-the-ear hearing device. In a hearing aid housing 1 for carrying behind the ear, one or more microphones 2 for receiving the sound from the environment are installed.
  • a signal Processing unit 3 which is also integrated into the hearing aid housing 1, processes the microphone signals and amplifies them.
  • the output signal of the signal processing unit 3 is transmitted to a loudspeaker or earpiece 4, which outputs an acoustic signal.
  • the sound is optionally transmitted via a sound tube, which is fixed with an earmold in the ear canal, to the eardrum of the device carrier.
  • the power supply of the hearing device and in particular the signal processing unit 3 is effected by a likewise integrated into the hearing aid housing 1 battery. 5
  • hearing aids are equipped with rechargeable batteries, electrical energy must be supplied to them at regular intervals.
  • the supply of electrical energy via galvani- see contacts is often considered negative, as the
  • the inductive charging methods are disadvantaged in terms of effectiveness of the wired charging systems in principle. This results from the magnetic coupling between primary and secondary coil, which is not equal to one, that is not ideal. The reason for this is the so-called stray field, namely the field lines that are generated by the primary coil, but do not penetrate the surface of the secondary coil. In addition to reduced efficiency, stray fields also lead to increased electromagnetic radiation from the charger.
  • it has hitherto been proposed to maximize the coupling between the primary and the secondary coil by means of a suitable geometric arrangement. So z. For example, in most electric toothbrushes, the primary coil is placed within the secondary coil in the same plane. This ensures that all field lines cross the secondary coil.
  • Other chargers with planar coils use ferrite cores that guide magnetic lines and minimize stray fields.
  • the object of the present invention is therefore to provide a charger for hearing devices, which ensures an increased charging efficiency.
  • a charger for a hearing device having a first magnetic element having a first passage surface for magnetic flux, and comprising a second magnetic element having a second passage surface for the magnetic flux, and an air gap between the two passage surfaces of the magnetic flux is penetrated, and in which a secondary coil of the hearing device is insertable.
  • the magnetic flux in the air gap and thus in the secondary coil or charging coil of a hearing device can be concentrated by the two magnetic elements, so that the degree of coupling of the inductive coupling between the charger and the hearing device increases.
  • the first magnetic element and the second magnetic element may each be an electrical coil.
  • both coils can be arranged to form a heat recovery coil.
  • a homogeneous magnetic field can be generated in a relatively large volume.
  • the first magnetic element and the second magnetic element may each be one end of a ferromagnetic core of a magnetic circuit with an air gap. If then the faces of two core sections spaced by the air gap are close to each other, results in the air gap, a magnetic field of high strength.
  • an excitation with a primary coil, through which the ferromagnetic core passes, is sufficient.
  • Such an arrangement has the advantage that hardly stray fields arise and thus the electromagnetic radiation from the charger is minimal.
  • the two passage surfaces are the same size and arranged so that they are parallel and their distance is smaller than the square root of the size of one of the two passage surfaces. This results in an intense, almost homogeneous magnetic field between the two magnetic elements or coils.
  • FIG. 1 is a schematic diagram of the essential components of a hearing aid
  • FIG 3 shows the coil arrangement of a charger according to a first embodiment of the present invention
  • FIG. 4 shows the generation of a homogeneous magnetic field in a charger according to a second embodiment of the present invention.
  • FIG 2 a primary coil 10 is shown, which generates a magnetic field in a known manner.
  • the magnetic field at the selected time has the structure and direction indicated by the field lines.
  • a corresponding alternating magnetic field In order to induce a current in a secondary coil 11, a corresponding alternating magnetic field must be generated.
  • the magnetic field then alternately has the drawn direction and the corresponding opposite direction. The strength of the magnetic field and thus the density of the magnetic field lines does not change during this change of direction.
  • the secondary coil 11 For charging an accumulator connected to the secondary coil 11, the secondary coil 11 is brought as close as possible and coaxially to the primary coil 10.
  • the magnetic field has already decreased significantly compared to the center of the primary coil 10.
  • a stray field arises in the area 12 a stray field that provides no contribution to the charging process.
  • the degree of coupling between primary coil 10 and secondary coil 11 and thus the charging efficiency of a charger with a corresponding coil arrangement is correspondingly low.
  • a coil arrangement according to FIG. 3 is proposed for a charging device of a hearing device.
  • the primary coil is here replaced by an arrangement of two or more coils 13, 14, which are arranged coaxially to each other. They can each be designed as planar coils and have in their interior a passage area through which the generated magnetic field passes.
  • the passage areas of the two coils 13 and 14 are the same size.
  • the two coils 13 and 14 are arranged here as a Helmholtz coil. Ie. the width of the air gap between the coils 13 and 14, ie their distance corresponds to their radius. If necessary, their distance is also smaller than the square root of the passage area of a coil.
  • FIG. 4 shows an alternative embodiment of the magnetic components of a charger according to the invention.
  • the magnetic components essentially consist of a ferromagnetic core 16 and a primary coil 17 applied thereto.
  • the annular core has an air gap 18.
  • the secondary coil 11 of the hearing device or of the hearing device can be inserted in it.
  • the one end face of the toroidal core in the air gap 18 or the end portion 19 of the core 16 the first magnetic element with the first passage area and the other end face of the annular core in the air gap 18 and the local end portion 20 of the core 16, the second magnetic element with the second passage area.
  • the two passage areas are chosen to be the same size here.
  • the width of the air gap 18 should be smaller than the square root of the passage area of the ferromagnetic core 16.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Neurosurgery (AREA)
  • Otolaryngology (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Power Engineering (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

Le rendement d'un chargeur à induction pour un dispositif auditif, en particulier pour une prothèse auditive, doit être amélioré. A cet effet, l'invention concerne un chargeur muni d'un premier élément magnétique (13), qui présente une première surface de passage pour un flux magnétique, et d'un second élément magnétique (14), qui présente une seconde surface de passage pour le flux magnétique. Un entrefer (15), formé entre les deux surfaces de passage, est traversé par le flux magnétique et une bobine secondaire (11) du dispositif auditif peut être introduite dans ledit entrefer. Ainsi, l'intensité du champ magnétique dans la bobine secondaire (11) peut être amplifiée par rapport au cas où la charge est effectuée avec une seule et unique bobine primaire. En variante, l'entrefer peut être également formé dans un noyau annulaire.
PCT/EP2009/050884 2008-02-13 2009-01-27 Chargeur à champ magnétique homogène WO2009100981A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US2821408P 2008-02-13 2008-02-13
US61/028,214 2008-02-13
DE102008008899A DE102008008899A1 (de) 2008-02-13 2008-02-13 Ladegerät mit homogenem Magnetfeld
DE102008008899.4 2008-02-13

Publications (1)

Publication Number Publication Date
WO2009100981A1 true WO2009100981A1 (fr) 2009-08-20

Family

ID=40896450

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2009/050884 WO2009100981A1 (fr) 2008-02-13 2009-01-27 Chargeur à champ magnétique homogène

Country Status (2)

Country Link
DE (1) DE102008008899A1 (fr)
WO (1) WO2009100981A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2375535A1 (fr) * 2010-04-09 2011-10-12 Nxp B.V. Appareil de transfert d'énergie vers un accumulateur et système pour charger un accumulateur électrique
WO2014008317A1 (fr) * 2012-07-02 2014-01-09 Resonate Industries, Inc. Systèmes et procédés de charge à distance de batterie miniature de faible puissance
EP2770753A1 (fr) * 2013-02-22 2014-08-27 Siemens Aktiengesellschaft Système de charge sans fil pour instruments auditifs
US9132276B2 (en) 2010-12-10 2015-09-15 Cochlear Limited Portable power charging of implantable medical devices
CN110474383A (zh) * 2018-05-09 2019-11-19 奥迪康有限公司 充电器天线单元、充电器装置及将被充电的装置
EP3796441A1 (fr) 2019-09-18 2021-03-24 Sivantos Pte. Ltd. Chargeur de batterie pour charger un appareil audio portable

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009056719A1 (de) * 2009-12-02 2011-06-09 Siemens Medical Instruments Pte. Ltd. Anordnung und Verfahren zum Laden einer Batterie eines In-dem-Ohr Hörgeräts
DE102014201118A1 (de) * 2014-01-22 2015-07-23 Siemens Aktiengesellschaft Duales Antennensystem zum Laden eines oder mehrerer Hörgeräte

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1989005530A1 (fr) * 1987-12-10 1989-06-15 Uniscan Ltd. Structure d'antennes servant a creer un champ uniforme
US6661197B2 (en) * 2001-02-22 2003-12-09 Uwe Zink Wireless battery charging system for existing hearing aids using a dynamic battery and a charging processor unit
US7211986B1 (en) * 2004-07-01 2007-05-01 Plantronics, Inc. Inductive charging system

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1116305B (de) * 1959-07-29 1961-11-02 Schmidt Geb Metallwarenfab Ladegeraet und wiederaufladbares Kleinelektrogeraet mit induktiver Kopplung
WO2008095530A1 (fr) 2007-02-05 2008-08-14 Continental Automotive Gmbh Module de commande et procédé pour faire fonctionner un véhicule automobile

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1989005530A1 (fr) * 1987-12-10 1989-06-15 Uniscan Ltd. Structure d'antennes servant a creer un champ uniforme
US6661197B2 (en) * 2001-02-22 2003-12-09 Uwe Zink Wireless battery charging system for existing hearing aids using a dynamic battery and a charging processor unit
US7211986B1 (en) * 2004-07-01 2007-05-01 Plantronics, Inc. Inductive charging system

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9590445B2 (en) 2010-04-09 2017-03-07 Nxp B.V. Apparatus for transferring energy to an accumulator and system for charging an electric accumulator
EP2375534A1 (fr) * 2010-04-09 2011-10-12 Nxp B.V. Appareil de transfert d'énergie vers un accumulateur et système pour charger un accumulateur électrique
US20110248673A1 (en) * 2010-04-09 2011-10-13 Nxp B.V. Apparatus for transferring energy to an accumulator and system for charging an electric accumulator
EP2375535A1 (fr) * 2010-04-09 2011-10-12 Nxp B.V. Appareil de transfert d'énergie vers un accumulateur et système pour charger un accumulateur électrique
US9597522B2 (en) 2010-12-10 2017-03-21 Cochlear Limited Portable power charging of implantable medical devices
US9132276B2 (en) 2010-12-10 2015-09-15 Cochlear Limited Portable power charging of implantable medical devices
WO2014008317A1 (fr) * 2012-07-02 2014-01-09 Resonate Industries, Inc. Systèmes et procédés de charge à distance de batterie miniature de faible puissance
EP2770753A1 (fr) * 2013-02-22 2014-08-27 Siemens Aktiengesellschaft Système de charge sans fil pour instruments auditifs
US9161141B2 (en) 2013-02-22 2015-10-13 Siemens Aktiengesellschaft Wireless charging system for hearing instruments
CN104009511A (zh) * 2013-02-22 2014-08-27 西门子公司 用于听力设备的无线充电系统
US9788129B2 (en) 2013-02-22 2017-10-10 Siemens Aktiengesellschaft Wireless charging system for hearing instruments
CN110474383A (zh) * 2018-05-09 2019-11-19 奥迪康有限公司 充电器天线单元、充电器装置及将被充电的装置
EP3573079A1 (fr) * 2018-05-09 2019-11-27 Oticon A/s Unité d'antenne de chargeur, dispositif chargeur et dispositif devant être chargé
US11451089B2 (en) 2018-05-09 2022-09-20 Oticon A/S Charger antenna unit, charger device, and device to be charged
EP3796441A1 (fr) 2019-09-18 2021-03-24 Sivantos Pte. Ltd. Chargeur de batterie pour charger un appareil audio portable
US11637343B2 (en) 2019-09-18 2023-04-25 Sivantos Pte. Ltd. Charger operable in different charging modes for charging an accumulator of the charger and an accumulator of an audio device

Also Published As

Publication number Publication date
DE102008008899A1 (de) 2009-08-27

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