(19)
(11) EP 1 513 169 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
23.12.2009 Bulletin 2009/52

(43) Date of publication A2:
09.03.2005 Bulletin 2005/10

(21) Application number: 04468015.5

(22) Date of filing: 03.09.2004
(51) International Patent Classification (IPC): 
H01F 13/00(2006.01)
(84) Designated Contracting States:
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PL PT RO SE SI SK TR
Designated Extension States:
AL HR LT LV MK

(30) Priority: 05.09.2003 SI 200300220

(71) Applicant: Iskra Mehanizmi, Industrija mehanizmov, aparatov in sistemov d.d.
4245 Kropa (SI)

(72) Inventors:
  • Hamler, Anton
    9250 Gornja Radgona (SI)
  • Sirc, Albin
    4240 Radovljica (SI)

(74) Representative: Flak, Antonija 
Patentni biro AF d.o.o., Kotnikova 32 p.p. 2706
1001 Ljubljana
1001 Ljubljana (SI)

   


(54) Multipole magnetizing device and method for producing such device


(57) A multipole magnetizing device uses a solid multipolar magnetizing head to carry out magnetization of permanent magnets, made of highly coercive materials such as hard magnetic ferrites and rare earths based materials, that require a very high magnetic field strength concentrated on precisely defined sections to reach the point of magnetic saturation.
The magnetization is carried out within a multipolar magnetizing head in such a way, that a series of symmetric and alternately opposite poles are produced on the permanent magnet. The magnetizing head has a shape of a tubular body, made of a material having good electrical conductivity. A succession of opposite current loops is created in the magnetizing head by appropriate geometry of vertical cuttings in the tubular body of the magnetizing head. The shape of the current loops ensures that the main portion of the electric current is sufficiently close to the surface of the magnet material. The width of the magnetic poles is defined by the gaps between the said cuttings.







Search report