The present invention relates to a transformer adaptable to electric machines of various types, in which the increase and decrease in the number of sheets of the laminated iron plates is made possible by holding with pressure the corners of the core with suppression plates. Metal plates are applied on the core in such a manner as to enclose it, cover plates are put on the top and bottom of the metal plates, thereby hermetically enclosing the core, the arrangement improves the heat radiation and ...

Transformer comprises a core (K1, K2), a primary winding (W1) and at least one secondary winding (W2), which are arranged as conductors on one or more layers of a flat carrier, and a coil former with a chamber system having chambers (C1, C2), which accommodate the layers with the windings (W1, W2). At least one of the chambers (C1, C2) is closed at least in regions, with the result that long distances for creepage paths are obtained. As a result of this, it is possible to adhere to existing safe...

The invention relates to a mid-frequency high power transformer which is specially used as a welding transformer in resistance welding, comprising a primary winding penetrated by the limb of a transformer core and a secondary winding which are configured as concentrically overlapping cylindrical windings. The windings of the primary windings are formed by a plurality of spirally wound layers of a relatively thin electrically conductive metal strip material, and the windings of the secondary wind...

A device for transformation of alternating current-voltage which includes a core, a primary winding subassembly and a secondary winding subassembly. One or both of the primary and secondary winding subassemblies consists of at least one pair of equal turn and approximately equal resistance windings wrapped co-directionally around the core, and each having an equal number of tapped sections. A special tandem switch selectively interconnects tapped sections within winding pairs to provide a desire...

The so-called delta-phi transformer makes use of the effects of various core materials and air gap sections in the cores on the magnetization curves of core materials. It consists of at least two magnetically separated cores, designated source core SK and regulating core RK, which possess different magnetic properties. At least one coil A, the primary winding, is wound on the cores, which are thereby electrically coupled. Hence, both cores SK and RK are traversed by the same magnetic flux. As a ...

A transformer including a bobbin having a primary winding frame and a secondary winding frame, a primary coil wound around the primary winding frame, a secondary coil wound around the secondary winding frame, a pair of connection pins electrically connected to a power source. A projection which can be broken or bent is provided on the bobbin. The wire of the primary coil is hitched over the projection and then wound to form the primary coil, and the projection is therafter broken or bent to loos...

A transformer includes a magnetic core; an input or primary winding structure wound on a bobbin secured to the magnetic core and including first and second primary winding portions; an output or secondary winding structure wound on the bobbin and including first and second secondary winding portions; and a control or tertiary winding structure wound on the bobbin and including first and second tertiary winding portions with the first tertiary winding portion being comprised of first and second w...

A transformer is described comprising a body of ferromagetic material and first and second conducting means that are wrapped around or pass through the ferromagnetic body. Each said conducting means comprises a plurality of insulated wires that are twisted together and doped with a high dielectric constant material in the region adjacent the ferromagnetic body. By this arrangement, an impedance transforming device is provided that has excellent broadband characteristics over several octaves in t...

A transformer comprising a specific combination of a seamless iron core portion having formed a completely closed magnetic path and laminated induction plates formed as a primary and a secondary windings, respectively; and a transformer comprising an auxiliary iron core portion which is smaller than the aforesaid iron core portion and intercrossed to the winding of the aforesaid transformer, and said auxiliary winding wound round the auxiliary iron core being adapted to induce therefrom a requir...

A transformer wherein one of the windings provided on the legs of a transformer core to which is imparted a centripetal compression force resulting from the winding-axial component of a leakage flux is effectively supported by said core legs substantially at Octo- to dodeca-sectional points in the circumferential direction of said winding, thereby increasing the buckling strength of said winding as the latter is buckled by a compression force which is generated therein due to short circuit troub...