A transformer assembly includes a housing, a core within an interior of the housing, and at least one winding positioned around the core. The at least one winding and the core are mounted to the housing with potting material. At least a portion of a fluid circuit is defined within at least one wall of the housing. The at least the portion of the fluid circuit is defined through an opening in the at least one wall of the housing in fluid communication with the interior of the housing. A transformer assembly includes a housing, a core within an interior of the housing, at least one winding positioned around the core, and a fluid circuit defined at least partially within at least one wall of the housing being configured such that heat is transferred to the fluid from at least one of the core and the at least one winding.

A surge voltage reducing member includes: a magnetic body including a long-side portion and short-side portions continuously formed at both ends of the long-side portion in a longitudinal direction; and a plurality of conductive paths wound around the long-side portion. Each of the conductive paths is wound in parallel along the longitudinal direction of the long-side portion.

An electromagnetic device includes a substrate, magnetic cores, transmission line layers, and conductive members. The substrate is provided with annular receiving grooves for accommodating the magnetic cores; the substrate is divided into a central portion and a peripheral portion; inner and outer via holes are respectively formed on the central portion and the peripheral portion, respectively; the transmission line layers each including wire patterns are respectively provided on opposite sides of the substrate; and the conductive members are sequentially connected to the wire patterns on both sides of the substrate to form a transformer and/or a filter; the electromagnetic device has a first side provided with a slot and a second side parallel to the transmission line layers; and first conductive pins electrically connected to the at least one transmission line layers are provided on at least one of the side wall surrounding the slot and a second side.

An in-vehicle motor-driven compressor includes a common mode choke coil including an annular core having a through-hole, a first winding and a second winding wound around the core, and an annular conductor. The second winding is opposed to the first winding while being spaced apart from the first winding. The conductor surrounds the first and second windings, and the core. The conductor includes sections opposed to each other with the through-hole in between. The core is symmetrical with respect to at least one symmetry axis when the through-hole is viewed from the front. The first winding is located on one side of the at least one symmetry axis, and the second winding is located on the other side of the symmetry axis, so that the at least one symmetry axis is located between the first and second windings. The core includes an exposed section not covered with the conductor.

A dual coil inductor apparatus is disclosed that includes a core, and inner coil, and an outer coil. The core may be formed of a ferromagnetic powder material in a one-piece toroidal shape. The inner coil winding is embedded within the core. The outer coil winding is wrapped radially around the outside of the core. A three-coil inductor apparatus is also disclosed that includes a core having common origin point with a first core loop lying in a x/y plane, a second core loop lying in a y/z plane, and a third core loop lying in a x/z plane. Windings around the core loops create magnetic fields in three planes when current is provided to the windings. The magnetic fields are orthogonal to each other and provide magnetically uncoupled inductors that may be provided with current separately or combined in series or parallel to potentially provide seven levels of induction.

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.

An inductor component includes a case; an annular core accommodated in the case; a coil wound around the core; and an electrode terminal attached to the case and connected to the coil. The electrode terminal includes a mounting surface portion that is disposed along an end surface of the core and that is to be mounted on a mount substrate, and a connection surface portion that is perpendicularly connected to the mounting surface portion and that is disposed along an outer peripheral surface of the core. The coil includes a plurality of pin members including a first linear pin member. A connection surface that is a part of an outer peripheral surface of the first linear pin member is in surface-contact with a first main surface of the connection surface portion in a state in which the connection surface is positioned parallel to the first main surface.

An inductor component includes a bottom plate portion that includes a first main surface and a second main surface; an annular core that is disposed on the bottom plate portion; a coil that is wound around the core; and an electrode terminal that is attached to the bottom plate portion and electrically connected to the coil. The electrode terminal includes a mounting surface portion configured to connect to a mount substrate. The core is disposed on the first main surface of the bottom plate portion so that an axis of the core intersects the first main surface of the bottom plate portion. The mounting surface portion is exposed on the second main surface side of the bottom plate portion, and at least a part of the mounting surface portion overlaps the core when seen in a direction perpendicular to the first main surface of the bottom plate portion.

An embedded magnetic component device includes a magnetic core located in a cavity extending into an insulating substrate. The cavity and magnetic core are coved with a cover layer. Through holes extend through the cover layer and the insulating substrate, and are plated to define conductive vias. Metallic traces are provided at exterior surfaces of the cover layer and the insulating substrate to define upper and lower winding layers. The metallic traces and conductive vias define the respective primary and secondary side windings for an embedded transformer. At least a first isolation barrier is provided on the cover layer, and at least a third insulating layer is provided on the substrate. The second and third insulating layers provide additional insulation for the device, and define and function as a circuit board for surface mounted power electronics.

A device includes a substrate including a cavity, a magnetic core in the cavity, a first winding extending around the magnetic core, and a single channel that extends between the cavity and an exterior of the device and that defines an opening. The first winding includes vias along an exterior periphery of the magnetic core opposite to the channel.