Patent ID: 8717139
Filing Date: 2014-05-06
Classification: H01F

Abstract:
1. A transformer arranged on a base place, comprising: a lower core, the lower core being made of a magnetic material, having a lower surface and an upper surface and being arranged on the base plate; at least two upper cores including two upper cores made of a magnetic material and arranged face to face over the upper surface of the lower core, the upper surface of the lower core being on the other side of the lower surface of the lower core through which the lower core is arranged on the base plate; a primary coil, and a secondary coil, the primary coil and the secondary coil being arranged between the lower core and the upper cores, wherein: each of the two upper cores is in contact with the lower core, on an outer side of the primary coil and the secondary coil, with a first gap being provided between the upper core and the lower core, on an inner side of the primary coil and the secondary coil; and the two upper cores are each extended from the outer side to the inner side of the primary coil and the secondary coil, in a direction of coming close to each other, with a second gap being provided between opposing surfaces of the two upper cores; and a spacer is provided as a one member having two spacer portions each functioning as the spacer and each being provided in each of the two first gaps and a remaining portion of the one member, which is other than the two spacer portions, is located to be in the second gap.