Transformer incorporated in electronic circuits

摘要

A vibration-suppressed transformer is fixed to a base plate and includes a magnetic lower core, two or more magnetic upper cores, primary and secondary coils. The lower core is on the base plate. The upper cores are arranged face to face over the lower core. The coils are arranged between the lower and upper cores. Each upper core contacts the lower core, on an outer side of the coils, with a first gap being provided between the upper and lower cores, on an inner side of the coils. The upper cores are extended towards each other from the outer to the inner side of the coils, with a second gap being provided therebetween. The second gap is provided therein with a non-magnetic pressing member to press the lower core against the base plate, on an inner side of the coils.

主权项

1. A transformer arranged on a base plate, 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 two first gaps being provided between the upper core and the lower core, on an inner side of the primary coil and the secondary coil; 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 pressing device including a pressing member made of a non-magnetic material and arranged in the second gap such that the pressing member presses the lower core against the base plate, the pressing member being prevented from being touched with the opposing surfaces of the two upper cores.