Resin molded coil and molded transformer using the same

(19)

(11)

EP 2 479 764 A3

(12)	EUROPEAN PATENT APPLICATION

(88)	Date of publication A3:
	22.08.2012 Bulletin 2012/34

(43)	Date of publication A2:
	25.07.2012 Bulletin 2012/30

(21)	Application number: 12151409.5

(22)	Date of filing: 17.01.2012

(51)

International Patent Classification (IPC):

H01F 27/32^(2006.01)

H01F 30/12^(2006.01)

(84)	Designated Contracting States:
	AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
	Designated Extension States:
	BA ME

(30)

Priority:

21.01.2011 JP 2011010366

(71)	Applicant: Hitachi Industrial Equipment Systems Co., Ltd.
	Tokyo (JP)

(72)	Inventors:
	Azegami, Tatsuhito Tokyo 100-8220 (JP) Takeuchi, Masaki Tokyo 100-8220 (JP) Sato, Kohei Tokyo, 100-8220 (JP) Suzuki, Atsushi Tokyo 100-8220 (JP) Ito, Yoshimitsu Tokyo 100-8220 (JP)

(74)	Representative: Calderbank, Thomas Roger et al
	Mewburn Ellis LLP 33 Gutter Lane London EC2V 8AS London EC2V 8AS (GB)

(54)	Resin molded coil and molded transformer using the same

(57) A resin molded coil is configured by providing multiple layers of a prepreg layer (41,42,43,44) and a fiber glass-base layer (31,32,33,34) in the inner/outer circumference resin layers in the radial direction of the concentric circle of a coil (1) and a winding wire to make the resin layer multiply-layered and subdivided. This configuration reduces the resin contraction amount of each layer and increases crack resistance.

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