A coil component includes an insulating layer; an annular ring-shaped coil core embedded in the insulating layer; a coil electrode wound around the coil core; an input electrode designed for external connection, disposed on a lower surface of the insulating layer, and connected to a first end of the coil electrode; and an output electrode designed for external connection, disposed on the lower surface of the insulating layer, and connected to a second end of the coil electrode. One of the input electrode and the output electrode is disposed inside the coil core in a plan view. With this configuration, unlike a conventional coil component in which both input and output electrodes are disposed outside a coil core, it is possible not only to easily reduce the area of the coil component in a plan view, but also to improve heat dissipation characteristics of the coil component.

A coil component includes an insulating layer; an annular ring-shaped coil core embedded in the insulating layer; a coil electrode wound around the coil core; an input electrode designed for external connection, disposed on a lower surface of the insulating layer, and connected to a first end of the coil electrode; and an output electrode designed for external connection, disposed on the lower surface of the insulating layer, and connected to a second end of the coil electrode. One of the input electrode and the output electrode is disposed inside the coil core in a plan view. With this configuration, unlike a conventional coil component in which both input and output electrodes are disposed outside a coil core, it is possible not only to easily reduce the area of the coil component in a plan view, but also to improve heat dissipation characteristics of the coil component.

An inductor includes a core made from a metallic magnetic material, a wire wound around the core, a pair of outer electrodes coupled to respective end portions of the wire, a shielding member arranged so as to cover a top face and three or more side faces of the core, and an insulating member arranged between the core and the shielding member and having thermal conductivity. The thickness of the shielding member is set by applying the electric resistivity and permeability of the shielding member and the frequency of noise desired to be shielded to an expression for determining the depth of a skin of skin effect. The thickness of the insulating member is set according to the breakdown voltage of the insulating member and the voltage with which insulation is desired to be ensured under a use environment of the inductor.

An inductor includes a core made from a metallic magnetic material, a wire wound around the core, a pair of outer electrodes coupled to respective end portions of the wire, a shielding member arranged so as to cover a top face and three or more side faces of the core, and an insulating member arranged between the core and the shielding member and having thermal conductivity. The thickness of the shielding member is set by applying the electric resistivity and permeability of the shielding member and the frequency of noise desired to be shielded to an expression for determining the depth of a skin of skin effect. The thickness of the insulating member is set according to the breakdown voltage of the insulating member and the voltage with which insulation is desired to be ensured under a use environment of the inductor.

A magnetic component in a power conversion device includes a bobbin that has a rod-shaped central portion and holds a core and a winding member. The central portion of the bobbin is configured to protrude from the winding member by a predetermined length and to come into contact with a cooling member in a state of being inserted into the winding member to penetrate the core having an annular shape. A filler is filled between the winding member and the cooling member in a state where the central portion comes into contact with the cooling member.

A magnetic component in a power conversion device includes a bobbin that has a rod-shaped central portion and holds a core and a winding member. The central portion of the bobbin is configured to protrude from the winding member by a predetermined length and to come into contact with a cooling member in a state of being inserted into the winding member to penetrate the core having an annular shape. A filler is filled between the winding member and the cooling member in a state where the central portion comes into contact with the cooling member.

The present disclosure provides a heat dissipation structure for a magnetic component and a magnetic component having the same. The magnetic component includes a plurality of heat dissipation pins, which are disposed on the winding of the magnetic component, wherein the magnetic component has one or more windings. The heat dissipation structure includes a circuit board on which a plurality of heat dissipation channels are disposed, and the heat dissipation pins of the windings are in contact with the heat dissipation channels; a plurality of heat conduction portions are disposed correspondingly under the heat dissipation channels of the circuit board; a heat conduction layer is arranged under the heat conduction portions and contacts with the heat conduction portions; and a heat dissipation layer is arranged under the heat conduction layer and contacts with the heat conduction layer.

A wireless charging device according to one embodiment comprises two types of magnetic parts having different magnetic properties, wherein the two types of magnetic parts can be appropriately arranged to effectively disperse heat, generated during wireless charging, through the distribution of magnetic flux, and improve durability against external shock or distortion. Accordingly, the wireless charging device may be usefully used in a transportation means, such as an electric vehicle, that requires a large amount of power transmission between a transmitter and a receiver.

A wireless charging device according to one embodiment comprises two types of magnetic parts having different magnetic properties, wherein the two types of magnetic parts can be appropriately arranged to effectively disperse heat, generated during wireless charging, through the distribution of magnetic flux, and improve durability against external shock or distortion. Accordingly, the wireless charging device may be usefully used in a transportation means, such as an electric vehicle, that requires a large amount of power transmission between a transmitter and a receiver.

Provided is an ignition coil device for an internal combustion engine with which a reduction in performance can be suppressed. In an ignition coil device for an internal combustion engine, a case main body houses an ignition coil device main body and an igniter. The igniter includes a circuit board and lead frames provided on the circuit board. The circuit board includes a substrate having a first surface and a second surface formed thereon. The substrate is arranged in a state in which the first surface faces a connector, and the second surface faces the ignition coil device main body. The connector includes connector conductors. The lead frames are provided on the first surface in a state of being opposed to the connector conductors.