A surface-mount inductor having a molded body which includes a coil formed by winding a rectangular wire and sealed by sealant having resin and filler, a surface of the molded body being a mounting face, the coil includes: first rolls wound in two-roll arrangement along the winding axis, the ends of the wire being placed at the outermost turn; and second rolls wound in positions adjacent to the first rolls and oppositely shifted along the winding axis, the inner diameter being equal to or larger than the outer diameter of the first rolls, the ends of the wire are brought out from the outermost turn of the second rolls as lead ends which are sealed in a manner that the winding axis is parallel with the mounting face and the lead ends are partially exposed at the mounting face, as well as a method for manufacturing the same.

A surface-mount inductor having a molded body which includes a coil formed by winding a rectangular wire and sealed by sealant having resin and filler, a surface of the molded body being a mounting face, the coil includes: first rolls wound in two-roll arrangement along the winding axis, the ends of the wire being placed at the outermost turn; and second rolls wound in positions adjacent to the first rolls and oppositely shifted along the winding axis, the inner diameter being equal to or larger than the outer diameter of the first rolls, the ends of the wire are brought out from the outermost turn of the second rolls as lead ends which are sealed in a manner that the winding axis is parallel with the mounting face and the lead ends are partially exposed at the mounting face, as well as a method for manufacturing the same.

The invention relates to a transformer construction comprising a plurality of transformer cores configured to share magnetic flux paths and, as a result, at least one of the cores comprises a post and an associated sidewall having an effective cross-sectional area which is less than that of the post. Such a construction may be employed in a power conditioning unit, for example, for a photovoltaic module, which is configured to operate the cores out of phase from each other. Also described is a transformer winding comprising a longitudinal spine having a first turn emanating from a first portion of the spine in a first transverse direction and a second turn emanating from a second portion of the spine in a second transverse direction, wherein the second transverse direction is opposite to the first transverse direction.

The invention relates to a transformer construction comprising a plurality of transformer cores configured to share magnetic flux paths and, as a result, at least one of the cores comprises a post and an associated sidewall having an effective cross-sectional area which is less than that of the post. Such a construction may be employed in a power conditioning unit, for example, for a photovoltaic module, which is configured to operate the cores out of phase from each other. Also described is a transformer winding comprising a longitudinal spine having a first turn emanating from a first portion of the spine in a first transverse direction and a second turn emanating from a second portion of the spine in a second transverse direction, wherein the second transverse direction is opposite to the first transverse direction.

A method for manufacturing an electric winding of an electromagnetic induction apparatus includes providing a conductor structure and forming an electric winding by means of the conductor structure. The conductor structure includes a conductor element extending longitudinally along a main extension direction and one or more spacer bands arranged on corresponding lateral surfaces of the conductor element. Each spacer band includes a supporting structure made of electrically insulating material and spacer elements made of electrically insulating material arranged on the supporting structure. The spacer elements are spaced one from another along the supporting structure. The electric winding extends axially along a winding direction and has a plurality of turns arranged around the winding direction. Each turn of the electric winding is formed by a corresponding longitudinal portion of the conductor element. The spacer elements are interposed between adjacent turns of the electric winding at opposite sides of the turns.

An electro-magnetic device is provided, including a first winding set of nested windings, and a second winding set of nested windings positioned adjacent to the first winding set. A method of making an electro-magnetic device including a first winding set of nested windings, and a second winding set of nested windings positioned adjacent to the first winding set is also provided.

An electro-magnetic device is provided, including a first winding set of nested windings, and a second winding set of nested windings positioned adjacent to the first winding set. A method of making an electro-magnetic device including a first winding set of nested windings, and a second winding set of nested windings positioned adjacent to the first winding set is also provided.

Provided is a method for winding an edgewise coil and a winding device capable of saving time and labor when changing a guide. A guide bar is disposed in contact with the side face of the rectangular conductor bent by the bending jig and the rotation center of the guide bar deviates from the rotation center of a bending jig for bending a rectangular conductor. The guide bar rotates in accordance with the action whereby the bending jig bends the rectangular conductor and supports the outside surface of a coil on the side of rotational direction of the bending jig.

Provided is a method for winding an edgewise coil and a winding device capable of saving time and labor when changing a guide. A guide bar is disposed in contact with the side face of the rectangular conductor bent by the bending jig and the rotation center of the guide bar deviates from the rotation center of a bending jig for bending a rectangular conductor. The guide bar rotates in accordance with the action whereby the bending jig bends the rectangular conductor and supports the outside surface of a coil on the side of rotational direction of the bending jig.

A negative feedback inductor and a gate inductor are formed in different wiring layers of a substrate so as to be at least partially overlapped with each other in a plan view. When the lower wiring layer is thinner and the upper wiring layer is thicker, the negative feedback inductor Lc is formed in the lower wiring layer that is thinner.