DK0921707T3 - Permanentmagnetindretning - Google Patents

Permanentmagnetindretning

Info

Publication number
DK0921707T3
DK0921707T3 DK98850184T DK98850184T DK0921707T3 DK 0921707 T3 DK0921707 T3 DK 0921707T3 DK 98850184 T DK98850184 T DK 98850184T DK 98850184 T DK98850184 T DK 98850184T DK 0921707 T3 DK0921707 T3 DK 0921707T3
Authority
DK
Denmark
Prior art keywords
permanent magnet
magnet assembly
assembly
permanent
magnet
Prior art date
Application number
DK98850184T
Other languages
English (en)
Inventor
Bjorn Borja
Original Assignee
Seas Fabrikker As
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 Seas Fabrikker As filed Critical Seas Fabrikker As
Application granted granted Critical
Publication of DK0921707T3 publication Critical patent/DK0921707T3/da

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
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/02—Details
    • H04R9/025—Magnetic circuit
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2209/00—Details of transducers of the moving-coil, moving-strip, or moving-wire type covered by H04R9/00 but not provided for in any of its subgroups
    • H04R2209/022—Aspects regarding the stray flux internal or external to the magnetic circuit, e.g. shielding, shape of magnetic circuit, flux compensation coils

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
  • Permanent Field Magnets Of Synchronous Machinery (AREA)
DK98850184T 1997-12-04 1998-12-02 Permanentmagnetindretning DK0921707T3 (da)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NO975614A NO305270B1 (no) 1997-12-04 1997-12-04 Permanentmagnetmontasje

Publications (1)

Publication Number Publication Date
DK0921707T3 true DK0921707T3 (da) 2007-02-12

Family

ID=19901404

Family Applications (1)

Application Number Title Priority Date Filing Date
DK98850184T DK0921707T3 (da) 1997-12-04 1998-12-02 Permanentmagnetindretning

Country Status (6)

Country Link
US (1) US6020805A (da)
EP (1) EP0921707B1 (da)
CN (1) CN1178549C (da)
DE (1) DE69836309T2 (da)
DK (1) DK0921707T3 (da)
NO (1) NO305270B1 (da)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE60141863D1 (de) * 2000-12-26 2010-05-27 Anders Sagren Elektroakustischer Wandler mit demontierbarer Membran und Schwingspuleanordnung
EP1381252A1 (en) * 2002-07-09 2004-01-14 FOCAL JMLab Multi-ferrite magnetic system for loudspeaker
GB0223654D0 (en) * 2002-10-10 2002-11-20 New Transducers Ltd Electromagnetic actuator
JP4078322B2 (ja) * 2004-03-11 2008-04-23 ホシデン株式会社 スピーカー
WO2006038261A1 (ja) * 2004-09-30 2006-04-13 Neomax Co., Ltd. Ｍｒｉ用磁界発生装置
JP2007040316A (ja) * 2005-07-29 2007-02-15 Smc Corp 環状磁石およびそれを用いた流体圧シリンダ
US7706563B2 (en) * 2005-12-19 2010-04-27 Harman International Industries, Incorporated Concentric radial ring motor
US20070297639A1 (en) * 2006-06-21 2007-12-27 Noll Michael A Multiple magnet loudspeaker
US7705702B2 (en) 2006-08-08 2010-04-27 Selex Galileo Ltd Actuator
GB2440768A (en) * 2006-08-08 2008-02-13 Selex Sensors & Airborne Sys Magnet assembly for moving coil actuator
JP2011525389A (ja) 2008-06-24 2011-09-22 アルバータ ヘルス サービシズ 磁石組立体およびイメージング・ボリューム用の磁場を決定する方法
FR2960738B1 (fr) * 2010-05-28 2015-09-25 Focal Jmlab Haut-parleur acoustique
GB2492360A (en) * 2011-06-29 2013-01-02 Gp Acoustics Internat Ltd Permanent rare-earth magnet assembly for a loudspeaker
ITMI20121411A1 (it) * 2012-08-08 2014-02-09 Ciare S R L Assemblato magnetico per altoparlante.
JP5857932B2 (ja) * 2012-10-03 2016-02-10 アイシン精機株式会社 センサユニットの製造方法
CN105282662B (zh) * 2015-11-09 2019-01-22 黄顺君 一种与双绕组反并动圈同构同工的双径向磁路

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3478289A (en) * 1968-02-12 1969-11-11 Robert A Parnell Permanent magnet assembly for a loudspeaker assembly
US3979566A (en) * 1973-12-12 1976-09-07 Erazm Alfred Willy Electromagnetic transducer
US4679022A (en) * 1985-12-27 1987-07-07 Sumitomo Special Metal Co. Ltd. Magnetic field generating device for NMR-CT
US4829277A (en) * 1986-11-20 1989-05-09 General Motors Corporation Isotropic rare earth-iron field magnets for magnetic resonance imaging
JP2558387B2 (ja) * 1990-11-16 1996-11-27 株式会社日立製作所 ボイスコイルモータおよび磁気ディスク装置
WO1993003586A1 (en) * 1991-08-05 1993-02-18 Aura Systems, Inc. Voice coil actuator
US5461677A (en) * 1993-09-16 1995-10-24 Ferrofluidics Corporation Loudspeaker
US5661446A (en) * 1995-06-07 1997-08-26 Mts Systems Corporation Electromagnetic actuator
US5786741A (en) * 1995-12-21 1998-07-28 Aura Systems, Inc. Polygon magnet structure for voice coil actuator

Also Published As

Publication number Publication date
NO975614A (no) 1999-04-26
EP0921707B1 (en) 2006-11-02
NO305270B1 (no) 1999-04-26
DE69836309D1 (de) 2006-12-14
EP0921707A2 (en) 1999-06-09
US6020805A (en) 2000-02-01
CN1219835A (zh) 1999-06-16
EP0921707A3 (en) 2004-07-14
CN1178549C (zh) 2004-12-01
NO975614D0 (no) 1997-12-04
DE69836309T2 (de) 2007-05-24

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