A transformer core includes: a plurality of core steel laminations; at least one guide slot on a surface of steel sheet forming each of the plurality of core steel laminations; and at least one shape retainer attached to the at least one guide slot joining a plurality of the steel sheets together.

A component includes a magnetic core having a body formed of a first material, defining a first opening and a second opening thereon. A duct formed of a second material extends at least partially through the body between the first opening and the second opening. The first opening and the second opening are in fluid communication by way of the duct.

A component includes a magnetic core having a body formed of a first material, defining a first opening and a second opening thereon. A duct formed of a second material extends at least partially through the body between the first opening and the second opening. The first opening and the second opening are in fluid communication by way of the duct.

An inductor includes a support having first and second coils formed on first and second surfaces thereof, respectively; a body embedding the support therein so that end portions of the first and second coils are exposed through first and second surfaces of the body opposing each other, and including a first magnetic part disposed in cores of the first and second coils and on upper and lower surfaces of the first and second coils, respectively, and second magnetic parts disposed on upper and lower surfaces of the first magnetic part, respectively; and first and second external electrodes formed on outer surfaces of the body to be electrically connected to the end portions of the first and second coils, respectively. The second magnetic part has a content of a hardening accelerator greater than that of the first magnetic part.

An inductor includes a support having first and second coils formed on first and second surfaces thereof, respectively; a body embedding the support therein so that end portions of the first and second coils are exposed through first and second surfaces of the body opposing each other, and including a first magnetic part disposed in cores of the first and second coils and on upper and lower surfaces of the first and second coils, respectively, and second magnetic parts disposed on upper and lower surfaces of the first magnetic part, respectively; and first and second external electrodes formed on outer surfaces of the body to be electrically connected to the end portions of the first and second coils, respectively. The second magnetic part has a content of a hardening accelerator greater than that of the first magnetic part.

In manufacturing a laminated iron core by laminating and bonding iron core laminates blanked from a sheet steel strip into a prescribed profile, the adhesive agent can be applied to the iron core laminates in a stable manner without regard to the arrangement and the number of the application spots on each iron core laminate. The metallic die machine (1) is provided with an adhesive agent application unit (12) configured to apply an adhesive agent to a prescribed area of the sheet steel strip (W) corresponding to the iron core laminates (2), and the adhesive agent application unit is provided with a casing (44) defining a plurality of adhesive agent storage chambers (55-57) for storing the adhesive agent before the adhesive agent is applied to the prescribed area. The casing is provided with a plurality of ejection orifices (H1 to H3) each communicating with a corresponding one of the adhesive agent storage chambers and configured to eject the adhesive agent.

In manufacturing a laminated iron core by laminating and bonding iron core laminates blanked from a sheet steel strip into a prescribed profile, the adhesive agent can be applied to the iron core laminates in a stable manner without regard to the arrangement and the number of the application spots on each iron core laminate. The metallic die machine (1) is provided with an adhesive agent application unit (12) configured to apply an adhesive agent to a prescribed area of the sheet steel strip (W) corresponding to the iron core laminates (2), and the adhesive agent application unit is provided with a casing (44) defining a plurality of adhesive agent storage chambers (55-57) for storing the adhesive agent before the adhesive agent is applied to the prescribed area. The casing is provided with a plurality of ejection orifices (H1 to H3) each communicating with a corresponding one of the adhesive agent storage chambers and configured to eject the adhesive agent.

In some embodiments, the instant invention involves an electrical system that at least includes: a three-phase inductor, including: a core, including: a plurality of core lamination pieces. having: a first core lamination piece and a second core lamination piece; where the first core lamination piece includes a plurality of first laminations that have a first shape and arranged in a first pattern to form a plurality of first differential mode gaps; where the second core lamination piece includes a plurality of second laminations that have a second shape and arranged a second pattern to form a plurality of second differential mode gaps; where the first pattern and the second pattern are distinct; where the first core lamination piece and the second core lamination piece are positioned at a particular orientation of the first pattern to the second pattern so that to increase a common mode inductance of the core.

A coil electronic component includes a body and external terminals. The body includes a winding coil part and a pillar-shaped core part inserted inside of the winding coil part and formed of a magnetic metal. The external terminals are connected to the winding coil part and disposed on an external surface of the body. The body contains the magnetic metal and a resin, and the pillar-shaped core part has magnetic permeability higher than that of a portion of the body disposed outside of the winding coil part.

An electric machine. The electric machine includes one or more face wound strips including a first strip. The one or more strips have a plurality of openings. The first strip has a plurality of turns, and an opening of a turn of the first strip overlaps an opening of an adjacent turn, to form a portion of a fluid channel of a plurality of fluid channels. The turn and the adjacent turn abut against each other at the overlapping openings.