Apparatus for generating magnetic fields

(19)

(11)

EP 0 924 719 A3

(12)	EUROPEAN PATENT APPLICATION

(88)	Date of publication A3:
	10.05.2000 Bulletin 2000/19

(43)	Date of publication A2:
	23.06.1999 Bulletin 1999/25

(21)	Application number: 98310054.6

(22)	Date of filing: 08.12.1998

(51)	International Patent Classification (IPC)⁷: H01F 7/20

(84)	Designated Contracting States:
	AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
	Designated Extension States:
	AL LT LV MK RO SI

(30)

Priority:

17.12.1997 GB 9726662
02.06.1998 GB 9811846

(71)	Applicant: Tesla Engineering Limited
	Storrington, Sussex RH20 3EA (GB)

(72)	Inventor:
	Sellers, Michael John Thakenham, West Sussex RH20 3EH (GB)

(74)	Representative: Smith, Norman Ian et al
	fJ CLEVELAND 40-43 Chancery Lane London WC2A 1JQ London WC2A 1JQ (GB)

(54)	Apparatus for generating magnetic fields

(57) Apparatus for generating a magnetic field comprises a plurality of bobbins 14 arranged in a predetermined configuration. Each bobbin carries first and second current carrying coils (20, 21). By appropriately energising the coils a magnetic field can be produced which can be switched between a first direction and a second direction. In another mode of operation the coils can be energised to produce a magnetic filed which rotates.

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