MANUFACTURING A SINTERED FLUX FOCUSING PERMANENT MAGNET WITH AN APPARATUS HAVING ASYMMETRICALLY FORMED MAGNETIC DEVICES

Title:

MANUFACTURING A SINTERED FLUX FOCUSING PERMANENT MAGNET WITH AN APPARATUS HAVING ASYMMETRICALLY FORMED MAGNETIC DEVICES

Document Type and Number:

WIPO Patent Application WO/2019/219984

Kind Code:

A3

Abstract:

It is described an apparatus (460, 560) and a method for manufacturing a sintered flux focusing permanent magnet (250, 350). The apparatus comprises (a) a mold (470, 570) having a molding chamber (472, 572) for receiving a powder of a permanent magnet material (495, 595); and (b) a first magnetic device (461, 561-1, 561-2) and a second magnetic device (464, 564) both for generating a magnetic field for magnetizing the powder (495, 595) being accommodated within the molding chamber (472, 572). The first magnetic device (461; 561-1, 561-2) comprises a first yoke structure (463; 563-1, 563-2) having a first shape and the second magnetic device (464, 564) comprises a second yoke structure (466, 566) having a second shape. The second shape is spatially different from the first shape. Further, the spatial difference in the shapes of the two yoke structures (463, 466; 563-1, 563-2, 566) causes the magnetic field to be inhomogeneous in such a manner that the magnetic field within the molding chamber (472, 572) is associated with a spread angular distribution of magnetic flux lines. Further described is a Sintered flux focusing permanent magnet (250, 350) which has been produced with the described method and an electromechanical transducer (140) as well as a wind turbine (100) comprising a sintered flux focusing permanent magnet (250, 350).

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Inventors:

AZAR ZIAD (GB)
HUANG QINGFANG (CN)
THOUGAARD HANS-JOERGEN (DK)
TONG QINGKUN (CN)
URDA ADRIANA CRISTINA (DK)

Application Number:

PCT/EP2019/073123

Publication Date:

March 05, 2020

Filing Date:

August 29, 2019

Export Citation:

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Assignee:

SIEMENS GAMESA RENEWABLE ENERGY AS (DK)

International Classes:

H01F41/02; H01F3/10; H01F7/20

Domestic Patent References:

WO2006064589A1

2006-06-22

Foreign References:

JP2006228937A	2006-08-31
EP2762838A2	2014-08-06
US20040244872A1	2004-12-09

Attorney, Agent or Firm:

ASPACHER, Karl-Georg (DE)

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