An electrical transformer and method of manufacturing an electrical transformer. The electrical transformer comprises a set of primary windings comprising first and second primary windings connected in parallel and first and second sets of secondary windings. Each of the first and second sets comprises a plurality of secondary windings that are connected in parallel. The secondary windings of the first set are electrically isolated from the secondary windings of the second set. The set of primary windings and the first and second sets of secondary windings are arranged in a stacked structure in which the secondary windings of the first set are interleaved with the secondary windings of the second set, and at least one secondary winding of the first set and/or at least one secondary winding of the second set is arranged between the first and second primary windings.

A coil unit connection structure is provided which can integrate locations connected to a power cable into one side in an arrangement direction of a plurality of coil units. In a coil unit connection structure that electrically connects a plurality of coil units, each of the coil units includes a coil and a return wire. A plurality of the coils of the plurality of coil units is electrically connected to each other. A plurality of the return wires of the plurality of coil units is electrically connected to each other. A terminal unit is provided which includes a connecting wire that electrically connects the coil and the return wire of the coil unit at the terminal end.

According to at least one aspect of the present disclosure, a method of operating a, Uninterruptible Power Supply (UPS) is provided. The method includes receiving, in a first mode of operation, AC power at an input of the UPS, providing, in the first mode, the AC power to a charger and a clamp-charger circuit, charging, by the charger in the first mode, a UPS battery of the UPS with a first charging current derived from at least a portion of the AC power, charging, by the clamp-charger circuit in the first mode, the UPS battery with a second charging current derived from at least a portion of the AC power, providing, in a second mode of operation, output power at an output of the UPS derived from the UPS battery, and charging, by the clamp-charger circuit in the second mode, the UPS battery using a third charging current.

An electric wire contains a conductive wire having at least a groove structured on the surface of the conductive wire, and an additional wire to be filled into the groove. The groove is provided on an outer surface of the conductive wire along a longitudinal direction of the conductive wire. The additional wire is inserted in the groove.

An electric wire for improving the adhesion force between the adjacent winding wires of a coil is described. The electric wire of the present invention may include a conductive wire with a substantially quadrilateral cross-sectional shape. The electric wire further includes a first groove and a second groove positioned diagonally at two opposite corners of the quadrilateral along a longitudinal direction of the conductive wire. An adhesive pocket filled with an adhesive is sized to fit within each of the first and second grooves at diagonally arranged opposite corners.

An inductor component includes an annular core; and a first coil and a second coil that are wound around the core so that winding axes thereof are parallel to each other. The first coil and the second coil each include a conductor portion and a coating that covers the conductor portion. The inductor component further includes a first insulating resin that covers at least a part of the conductor portion of the first coil, the part being exposed from the coating; and a second insulating resin that covers at least a part of the conductor portion of the second coil, the part being exposed from the coating. The first insulating resin and the second insulating resin are not connected but separated in a space between surfaces of the first coil and the second coil that face each other.

A coil module includes a first coil set and a second coil set. The first coil set has an isolation frame. The second coil set has an open first winding body. The first winding body has two ends which are out of contact with each other. One of the two ends has a first conductive portion projecting from the first winding body. The other one of the two ends has a connecting end from which an open second winding body is integratedly outward extended. A terminal of the second winding body has a second conductive portion which is outward protrudent. The connecting end comprises a bent portion which makes the second winding body and the first winding body arranged in the same direction so that the second winding body and the first winding body are attached on two opposite sides of the isolation frame.

An inductive component, which has an annular core having a core cross section and made of a soft-magnetic material and a coil surrounding the core is provided. The coil is composed of two electrically conductive sections. The sections each have a basic U shape with two limbs, of which the first limb is longer than the second limb and the first limb is curved and towards the end of same projects away from a plane defined by the basic U shape. The sections are pushed onto the core next to one another so that the basic U shape of each section surrounds the core cross section on three sides. The first limb of a section is mechanically and electrically connected to the second limb of the other section. A method for producing a component of this kind is also described.

In order to create a full variable shunt reactor having two magnetically controllable high-voltage throttles which is compact and at the same time can also provide capacitive reactive power, auxiliary windings are used which are inductively coupled to the high-voltage throttles. The auxiliary windings are connected to at least one capacitively acting component.

An inductor element includes a magnetic body core provided with a through-hole, and a coil inserted through the through-hole and wound around the magnetic body core a plurality of times. The coil includes three bonding portions located on one side in a thickness direction of the magnetic body core. The three bonding portions are located on a first virtual plane that partially intersects with the coil.