A transformer for transferring electrical power from a stationary member to a rotating member, with a primary winding and a secondary winding, by means of annular primary and secondary windings disposed in annular slots. The transformer of the kind initially specified can be designed with smaller dimensions and can transfer more power with the same dimensions.

A pair of flanges 16 are formed on both ends of a spool 14 of a bobbin 12, and an insulation layer 32 formed by heat curing an interlayer insulation prepreg tape 22 is formed on the external periphery of the spool 14. A primary coil 26 is wound on the external periphery of the insulation layer 32, and a secondary coil 28 is wound on the external periphery of the primary coil 26. Insulation layers 32 are provided respectively between the primary coil 26 and the secondary coil 28, and on the exter...

A transformer arranged to be mounted on a subject, such as a printed circuit board or the like, such that the central axis of a winding thereof is positioned horizontally. The transformer includes a bobbin portion having flange portions which are formed perpendicular to the central axis and which have terminal portions disposed on the lower end portion thereof, wherein the terminal portions are connection terminal portions to the subject. That is, leading ends of the windings are connected to th...

The invention relates to a transformer (10, 10') with a core (11) which has a center piece (11a) with a first and a second flange (11b, 11c), in which a first and a second winding (12, 13) of the transformer (10, 10') are wound on the center piece (11a).To produce a transformer as compact as possible which allows simple adaptation to limit leakage currents, it is proposed that the winding end pieces (12a, 12b) of the first winding (12) guided out of the winding body are guided through at least o...

A transformer structure is disclosed. The transformer comprises a primary winding coil, plural secondary winding coils, a first winding portion, plural second winding portions, plural partition plates, a channel, and a magnetic core assembly. The first winding portion is used for winding the primary winding coil thereon, and the plural second winding portions are used for winding the secondary winding coils thereon and disposed at two sides of the first winding portion. The plural partition plat...

The present invention relates to a transformer. In the transformer, secondary winding sections are placed in both sides of a primary winding section, all terminals of the secondary winding sections are used as output terminals, and an input terminal is placed in the opposite side to the output terminals. Therefore, a return wire in the high-voltage output side does not need to be provided, and a sufficient insulation separation distance is secured in the relation with a printed circuit board, wh...

There is provided a joint structure of a wound iron core in which iron core characteristics can be enhanced by improving the distribution of magnetic flux within an iron core. A wound iron core is formed to provide a joining structure or a butt joining structure and a lap joining structure disposed in an appropriate arrangement in which the a margin of overlapping is more increased as being closer to an outer periphery from an inner periphery of the iron core, taking a distribution of magnetic f...

A transformer has a cover and a bobbin. The cover has a cavity and a bottom opening. The cavity is formed inside of the over. The bobbin is mounted inside the cavity in the cover and has two surfaces, multiple pins and multiple coils. The pins are mounted through the bobbin and protrude from the two surfaces of the bobbin. The coils are mounted between the pins and have wires connected to each other. After the coils are connected to pins and tested, the bobbin with the coils can be mounted in th...

Disclosed herein is a transformer including: an iron core; and a winding wound around the iron core; wherein the iron core includes a column-shaped output side iron core part, a plurality of column-shaped input side iron core parts, and a connecting iron core part, the winding includes a plurality of primary windings, a secondary winding, and generated magnetic fluxes.

A transformer has a bar-shaped ferrite core, an inner winding wound directly around the ferrite core, an outer winding wound over the inner winding, and a dielectric shield surrounding the outer winding. The outer winding has its circumference covered by a dielectric sheath, and has an intermediate winding portion between its winding start end and its winding stop end. The dielectric sheath in the intermediate winding portion is spaced from each other along the axis of the ferrite core to leave ...