A magnetic device includes a winding, and insulators by which the winding is surrounded. Each of the insulators is in contact with the winding. A gap exists between each two adjacent of the insulators in a winding direction of the winding.

A coil component including a terminal for external connection to which a plurality of secondary-side winding wires are connected, and a gathering member that gathers vicinities of terminal ends of the plurality of winding wires.

In an ignition coil for an internal combustion engine, a coil case includes a housing section and a high-voltage tower section. The housing section houses a primary coil, a secondary coil, a center core, and an outer peripheral core, and is arranged outside a plug hole in a cylinder of an internal combustion engine in which an ignition plug is arranged. The high-voltage tower section protrudes from the housing section, and is disposed within the plug hole. A pole joint is disposed within the plug hole, and is mounted to the high-voltage tower section via a seal rubber. The pole joint is provided with a rib that protrudes to an outer periphery and faces an inner peripheral surface of the plug hole. The inner peripheral side of the rib faces the high-voltage tower section via the seal rubber.

An inductive component is disclosed. In an embodiment, the inductive component includes at least one electrical conductor, a coil former with a hollow-shaped winding former, for being wound with the at least one electrical conductor, and a magnetic core, which is arranged in a cavity of the winding former. The at least one electrical conductor is surrounded by a potting material. The potting material has no directly adherent contact with the magnetic core so that the magnetic core is decoupled from the potting material.

An ignition coil for an internal combustion engine, provided with a primary coil, a secondary coil, a bobbin, a center core and a mold resin member. The primary coil and secondary coil are magnetically connected to each other. The primary coil is directly wound on the bobbin. The center core is disposed in close contact with the bobbin at an inner space thereof. The mold resin member has the primary coil, the secondary coil, the bobbin, and the center core embedded at the inner side thereof. The bobbin includes thermoplastic resin and dispersed phase particles which are dispersed in the thermoplastic resin. The dispersed phase particles being lower in elasticity than the thermoplastic resin.

A transformer includes: an upper E core; a lower E core; a first coil portion disposed so as to cover a magnetic leg of the upper E core and a magnetic leg of the lower E core; and a second coil portion disposed so as to cover the periphery of the first coil portion in a direction perpendicular to the central axis of winding of the first coil portion. The first coil portion includes a bobbin and an edgewise coil wound around the bobbin. The second coil portion includes a bobbin and an edgewise coil wound around the bobbin.

The present invention relates to a bobbin assembly (1000-3) comprising: a plurality of winding slots (1000-4), each of which comprises a winding (10) with one turn per layer; and a plurality of isolation slots (1000-5), each of which comprises one single loop of the winding (10), and each of the isolation slots (1000-5) is adjacent to at least one winding slot (1000-4) of the plurality of winding slots (1000-4), and each of the winding slots (1000-4) is adjacent to at least one isolation slot (1000-5) of the plurality of isolation slots (1000-5).

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.

An ignition coil for delivering a spark-generating current to a spark plug includes a magnetically-permeable core; a primary winding disposed outward of the core; and a secondary winding radially surrounding the primary winding and inductively coupled to the primary winding, the secondary winding having a low-voltage end and a high-voltage end. The secondary winding includes a secondary winding first section proximal to the low-voltage end and having a first thickness. The secondary winding also includes a secondary winding second section proximal to the high-voltage end and having a second thickness that is less than the first thickness of the secondary winding first section.

A method is provided for manufacturing a transformer. The method includes preparing a core, a first coil portion that covers at least part of the core, and a second coil portion that covers a periphery of the first coil portion perpendicular to a central axis of winding of the first coil portion. The first and second coil portions each include a bobbin and a coil wound therearound. The coil of the first or second coil portion is an edgewise coil. The method also includes: screwing the bobbin and coil of the first coil portion with each other, and screwing the bobbin and coil of the second coil portion with each other; and attaching the second coil portion to the outside of the first coil portion perpendicular to the central axis of winding of the first coil portion, and attaching the core to sandwich the first and second coil portions in an axial direction of the first coil portion.