A reactor includes a coil that has unit coils. Spacers are disposed in (i) at least one of spaces between the unit coils adjacent to each other in the central axis direction and (ii) a space between each of the support frames and the unit coil. Bolts penetrate the support frame and the spacers, and the spacers are fixed to the bolts The bolts include fitting portions to be fitted to one of the spacers on a notch or a through hole formed in a projection part of the spacer.

A transformer module and a power module are provided. The transformer module includes: a magnetic core, a first winding and a second winding. The magnetic core includes at least one magnetic column at least partially covered by a multi-layer carrier including a plurality of horizontal copper foils and connecting copper foils. Horizontal copper foils are located on horizontal wiring layers, and connecting copper foils are disposed to connect horizontal copper foils. First and second windings surround the magnetic column, and the second winding is located outside the first winding. Both the first and second windings are formed by a horizontal copper foil and a connecting copper foil; two ends of the first winding are electrically connected to first and second surface-mounted pins; two ends of the second winding are electrically connected to third and fourth surface-mounted pins; these pins are disposed on at least one surface of the transformer module.

A method for classifying a status of a winding clamping of a power transformer immersed in an oil filled transformer tank, the power transformer including at least one transformer coil with at least one clamped electrical winding arranged on a transformer core, includes the following steps: applying a mechanical force impulse on an impact area of the transformer tank, so that the at least one clamped electrical winding is mechanically excited to vibration and a voltage is induced within the at least one clamped electrical winding; measuring the induced voltage of the at least one clamped electrical winding for a period of time during vibration to generate measurement data; transferring the measurement data from the time domain into the frequency domain and providing a respective dataset comprising the measurement data in the frequency domain; and searching for local maxima within the measurement data in the frequency domain of the dataset.

A coil module includes a coil conductor including a plurality of coil elements and a plurality of wire electrodes disposed on a circuit board, each of the plurality of coil elements including a pair of leg portions and a bridge portion connecting one end portions of the pair of leg portions together, the plurality of coil elements being disposed to cross a winding axis. A method for manufacturing the coil module includes an assembly forming step of integrating the plurality of coil elements with resin to form a coil element assembly, and a conductor forming step of mounting the coil element assembly on the circuit board to complete the coil conductor wound about the winding axis. In the conductor forming step, the resin is introduced into a die set in which the plurality of coil elements are arranged to form a block, to thus form the coil element assembly.

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.

A wire-wound magnetic component includes a magnetic core, a coil set, a bobbin, an insulating wrapper, a caulking member and an ingress-protective finishing film. The magnetic core has at least one leg. The coil set is aligned and interacts with the magnetic core for electromagnetic induction, wherein the coil set includes at least one coil. The bobbin includes: a main body having a hollow portion for accommodating the leg of the magnetic core, and winding therearound a conductive wire to form the coil set, wherein the conductive wire has an unwound free end extending from the coil set; a cover plate disposed at an end of the main body and configured as a flange so as to define a winding space for accommodating the coil set; and an ingress-protective structure disposed in the winding space and separating the coil set from the cover plate.

A transformer includes a substrate and a first metal layer having a first inductor having a first center tap. A second metal layer includes a second inductor having a second center tap, and the second metal layer includes a bond pad. A third metal layer includes a first conductor electrically connecting the bond pad to the first center tap, and the third metal layer includes a second conductor electrically connecting the bond pad and the first center tap. The third metal layer is situated between the substrate and the first metal layer, and the first metal layer is situated between the third metal layer and the second metal layer.

Provided are an inversely coupled inductor and a power module. The inversely coupled inductor includes a magnetic core, a first winding and a second winding, where a first passage is formed in the magnetic core; a part of the first winding and a part of the second winding pass through the first passage, and the first winding crosses with the second winding outside the first passage. The power supply module includes the above inversely coupled inductor, which is in turn stacked on, and electrically connected to, the packaged chip module. By arranging the two windings to cross with each other on the outside of the first passage of the magnetic core, the same type terminal (such as input pins or output pins) of the inversely coupled inductor can be located on the same side.

Disclosed are a clamping device of a stereoscopic wound iron core transformer and a transformer. The clamping device includes a lower frame, a plurality of upper platen assemblies and a plurality of screw assemblies. The lower frame is configured for being arranged at lower sides of a plurality of coil windings of the stereoscopic wound iron core transformer, the plurality of upper platen assemblies are configured for being distributed at upper sides of the plurality of coil windings, and the lower frame and the upper platen assemblies are connected through the screw assemblies, so as to clamp the coil windings together.