Provided is a wireless power transfer antenna core. In the wireless power transfer antenna core according to an exemplary embodiment of the present invention, a conductive member configured to serve as an antenna for transmitting or receiving wireless power is wound multiple times along a longitudinal direction. The wireless power transfer antenna core is made of a magnetic body and comprises: a first portion having a first cross-sectional area; and a second portion extending with a predetermined length from an end of the first portion and second cross-sectional area that is relatively larger than the first cross-sectional area, wherein the conductive member is wound multiple times on the first portion.

The present invention discloses a stiffness-adjustable electromagnetic spring. The spring includes a central shaft, an intermediate electromagnetic force control component, and two end electromagnetic force control components, where the two end electromagnetic force control components are located on both sides of the intermediate electromagnetic force control component, the two end electromagnetic force control components and the intermediate electromagnetic force control component are both sleeved on the central shaft, and the intermediate electromagnetic force control component is coaxial with the two end electromagnetic force control components. The stiffness of the electromagnetic spring can be controlled online and the nonlinearity can be adjusted. The spring disclosed in the present invention can generate adjustable negative stiffness to decrease the dynamic stiffness without reducing the static stiffness, thus break through the limitation of carrying capability of the spring on the vibration isolation performance, and has characteristics of compact structure, fast response, and easy control.

An electromagnetic actuator. The electromagnetic armature includes: an armature movable in an axial direction in an armature space; a magnetic coil for generating a magnetic field to move the armature; an operating element motion-coupled to the armature; and a flux-directing part, disposed at an axial end of the magnetic coil, having a recess which extends in the axial direction and in which the operating element is displaceably disposed, the flux-directing part being embodied in two parts. The flux-directing part is embodiment in two parts from a base part facing toward the armature and a top part facing away from the armature. The operating element is mounted, displaceably in the axial direction, in a first bearing point embodied on the top part and in a second bearing point embodied on the base part.

The subject matter described herein relates to laminated magnetic cores, methods of fabricating laminated magnetic cores, and electric devices using laminated magnetic cores. In some examples, a method for fabricating a laminated magnetic core includes depositing a first magnetic layer and depositing an interlamination layer of over the first magnetic layer. The interlamination layer comprises a partially conducting material having a conductivity greater than or equal to 10.sup.4 S/cm and less than or equal to 10.sup.5 S/cm. The method includes depositing a second magnetic layer over the interlamination layer. The method can include sequentially depositing additional interlamination layers and additional magnetic layers in an alternating fashion to produce the laminated magnetic core.

A dust core includes a metal magnetic material, a resin, an insulation film, and an intermediate layer. The insulation film covers the metal magnetic material. The intermediate layer exists between the insulation film and the metal magnetic material and contacts therebetween. The metal magnetic material includes 85 to 99.5 wt % of Fe, 0.5 to 10 wt % of Si, and 0 to 5 wt % of other elements, with respect to 100 wt % of the entire metal magnetic material. The intermediate layer includes a FeSiO based oxide. The insulation film includes a SiO based oxide.

A dust core includes a metal magnetic material, a resin, an insulation film, and an intermediate layer. The insulation film covers the metal magnetic material. The intermediate layer exists between the insulation film and the metal magnetic material and contacts therebetween. The metal magnetic material includes 85 to 99.5 wt % of Fe, 0.5 to 10 wt % of Si, and 0 to 5 wt % of other elements, with respect to 100 wt % of the entire metal magnetic material. The intermediate layer includes a FeSiO based oxide. The insulation film includes a SiO based oxide.

A modulated inductance module includes an inductor including one or more electrical conductors disposed around a ferromagnetic ceramic element formed on a semiconductor die, wherein the inductor further has two or more metal oxides having fluctuations in metal-oxide compositional uniformity less than or equal to 1.50 mol % throughout said ceramic element, the ceramic element has crystalline grain structure having a diameter that is less than or equal to 1.5 a mean grain diameter, and the semiconductor die contains active semiconductor switches or rectifying components that are in electrical communication with the one or more electrical conductors of the inductor.

A modulated inductance module includes an inductor including one or more electrical conductors disposed around a ferromagnetic ceramic element formed on a semiconductor die, wherein the inductor further has two or more metal oxides having fluctuations in metal-oxide compositional uniformity less than or equal to 1.50 mol % throughout said ceramic element, the ceramic element has crystalline grain structure having a diameter that is less than or equal to 1.5 a mean grain diameter, and the semiconductor die contains active semiconductor switches or rectifying components that are in electrical communication with the one or more electrical conductors of the inductor.

Systems and methods are provided for implementing and utilizing lighting attachments for use in conjunction with handheld magnetization equipment during non-destructive testing (NDT). The lighting attachments may incorporate snap-fit based designed, and may be configured for providing lighting based on the magnetization function of the magnetization equipment.

Systems and methods are provided for implementing and utilizing lighting attachments for use in conjunction with handheld magnetization equipment during non-destructive testing (NDT). The lighting attachments may incorporate snap-fit based designed, and may be configured for providing lighting based on the magnetization function of the magnetization equipment.