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Title: US5926083: Static magnet dynamo for generating electromotive force based on changing flux density of an open magnetic path
[ Derwent Title ]


Country: US United States of America

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12 pages

 
Inventor: Asaoka, Keiichiro; Atsugi-City, Kanagawa, Japan

Assignee: None

Published / Filed: 1999-07-20 / 1998-02-10

Application Number: US1998000021169

IPC Code: Advanced: H01F 3/10; H01F 29/14; H01F 30/00;
IPC-7: H01F 21/00; H01F 21/08;

ECLA Code: H01F3/10;

U.S. Class: Current: 336/110; 336/160; 336/165; 336/178;
Original: 336/110; 336/160; 336/165; 336/178;

Field of Search: 336/110,160,155,165,178 310/181

Priority Number:
1997-02-10  JP1997000026457

Abstract:     A static magnet dynamo including at least one permanent magnet having different poles; a first core comprising a soft magnetic material and which couples the different poles of the permanent magnet to form a closed magnetic path therein; a second core comprising a soft magnetic material which couples to the closed magnetic path via a paramagnetic material to form an open magnetic path; a magnetized coil wound around a portion of the first core where the closed magnetic path is formed; and an induction coil wound around a portion of the second core. A direction of a flux of the closed magnetic path is changed by applying an alternating voltage to the magnetized coil, generating an electromotive force in the induction coil by electromagnetic induction due changes in a flux of the open magnetic path induced by the change in direction of the flux of the closed magnetic path.

Attorney, Agent or Firm: Oblon, Spivak, McClelland, Maier & Neustadt, P.C. ;

Primary / Asst. Examiners: Gellner, Michael L.; Mai, Anh

Maintenance Status: E1 Expired  Check current status

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First Claim:
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What is claimed as new and desired to be secured by Letters Patent of the United States is:     1. A static magnet dynamo comprising:
  • at least one permanent magnet having different poles;
  • a first core comprising a soft magnetic material and which couples the different poles of the permanent magnet to form a closed magnetic path therein;
  • a second core comprising a soft magnetic material which couples to the closed magnetic path via a paramagnetic material to form an open magnetic path;
  • a magnetized coil wound around a portion of the first core where the closed magnetic path is formed; and
  • an induction coil wound around a portion of the second core;
  • wherein a direction of a flux of the closed magnetic path is changed by applying an alternating voltage to the magnetized coil, generating an electromotive force in the induction coil by electromagnetic induction due changes in a flux of the open magnetic path induced by the change in direction of the flux of the closed magnetic path.


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Forward References: Show 6 U.S. patent(s) that reference this one

       
U.S. References: Go to Result Set: All U.S. references   |  Forward references (6)   |   Backward references (4)   |   Citation Link

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Patent  Pub.Date  Inventor Assignee   Title
Get PDF - 7pp US4020433  1977-04 Uchidoi et al.  Canon Kabushiki Kaisha Release type electromagnetic device
Get PDF - 11pp US4031457  1977-06 Oberbeck  The Charles Stark Draper Laboratory, Inc. Saturable reactor current limiter
Get PDF - 11pp US4122385  1978-10 Oberbeck  The Charles Stark Draper Laboratory, Inc. Saturable reactor current limiter
Get PDF - 16pp US4989574  1991-02 Abe  Fuji Jukogyo Kabushiki Kaisha Electromagnetic pickup
       
Foreign References:
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Publication Date IPC Code Assignee   Title
  DE199103938-577 1991-05       


Other Abstract Info: DERABS G1998-438554

Other References:
  • Joshi, New magnetic device, Journal of the Institude of Engineers (India), Electronics and Telecommunication Engineering Division vol. 56, Apr. 1976.


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