A transformer for a multiphase power converter includes a magnetic structure, a first coil configured to electrically couple to an input circuit or an output circuit of a subconverter of the multiphase power converter, and a second coil configured to electrically couple to an input circuit or an output circuit of another subconverter of the multiphase power converter. The magnetic structure includes a top member, a bottom member, and legs extending between the top member and the bottom member in substantially the same direction. The legs include two outer members and two inner members. The first coil is wound about one of the two inner members of the magnetic structure, and the second coil is wound about the other one of the two inner members of the magnetic structure. Other example transformers, and multiphase power converters including transformers are also disclosed.

An electromagnetic component assembly includes a first magnetic core piece, a second magnetic core piece, and an inverted U-shaped conductive winding including a base section and first and second legs extending from base section. One of the first and second magnetic core pieces is configured to receive the base section. The first and second magnetic core pieces are gapped from one another to define a first gap, and one of the first and second magnetic core pieces includes a second gap that, in combination with the first gap, allows the component to be operated at more than one stable open circuit inductance (OCL) corresponding to different current loads.

A magnetic device and an electronic device are provided. The magnetic device includes a magnetic core assembly and a winding assembly. The magnetic core assembly includes a first magnetic cover, a second magnetic cover, a first magnetic leg and a second magnetic leg. The first magnetic leg and the second magnetic leg are between the first magnetic cover and the second magnetic cover. A channel is formed between the first magnetic leg and the second magnetic leg. The winding assembly includes two coupled windings. Each coupled winding includes a first sub-winding, a second sub-winding, a third sub-winding. The first sub-winding goes through the channel. The second sub-winding is wound around the first magnetic leg. The third sub-winding is wound around the second magnetic leg.

A reactor includes a coil having a winding portion, and a magnetic core including a core piece having an inner core portion disposed inside the winding portion. The core piece is a compact made of a composite material that contains a magnetic powder and a resin. The reactor further includes: a first projection that is integrated with and projects from an outer peripheral face of the inner core portion, and comes into contact with an inner peripheral face of the winding portion so as to position the winding portion in a diameter direction of the winding portion, and a second projection that is integrated with and projects from the core piece at a position opposing an end face of the winding portion, and comes into contact with the end face of the winding portion so as to position the winding portion in an axial direction thereof.

There is provided a transformer (101) in which deformation of a coil (403, 503, 603) caused by a short-circuit electromagnetic mechanical force can be suppressed by using a coil pressing metal fitting (303, 401, 501, 601) that saves space and that is lightweight.

A coil pressing metal fitting (303, 401, 501, 601) includes a coil pressing metal fitting base member (201, 301) that comes into contact with a coil (403, 503, 603), and a reinforcement member (302) disposed outside the coil pressing metal fitting base member (201, 301). The reinforcement member (302) is connected and fixed to the coil pressing metal fitting base member (201, 301) by a joining member from inside the coil pressing metal fitting base member (201, 301) through the hole (202, 204) of the coil pressing metal fitting base member (201, 301).

An magnetic component structure with thermal conductive filler is provided in the present invention, including an upper magnetic core, a lower magnetic core combining with the upper magnetic core to form a casing with a front opening and a rear opening, and a coil mounted in the casing, where two terminals of the coil extend outwardly from the front opening, and a thermal conductive filler filling between the casing and the coil in the casing.

A ferrite core includes a ferrite sintered body in which integrally formed are a winding core portion, extending in a lengthwise direction, and flange portions provided at both ends in the lengthwise direction of the winding core portion and projecting from the winding core portion in at least a height direction orthogonal to the lengthwise direction. Pores are present inside the winding core portion and the flange portions, and an abundance ratio of the pores in the winding core portion is equal to or more than about 0.05% and equal to or less than about 1.00% (i.e., from about 0.05% to about 1.00%).

An electrical appliance for connecting to a high voltage includes an active part, which is provided with a magnetizable core and at least one winding assembly, surrounding a respective core section of the core and having windings that are inductively coupled to one another. A tank, which can be filled with an insulating fluid, encases the active part. The tank has two end casings and a central part arranged between the end casings. The electrical appliance is compact and has a low tare weight. The active part is mechanically connected to the boiler only at the end casings and the end casings are supported on fasteners. The central part is produced from a light material.

An electrical appliance for connecting to a high voltage includes an active part, which is provided with a magnetizable core and at least two winding assemblies, each surrounding a core section of the core and having windings that are inductively coupled to one another. The active part is entirely arranged a tank, which can be filled with an insulating fluid. The tank has two end casings and a central part arranged between the end casings. The electrical appliance is compact and has a low tare weight. The central part forms a hollow body for each winding assembly, through which a respective one of the core sections extends, which is surrounded by an associated winding assembly. The hollow bodies are connected to one another on the inside and only via the internal volume of the end casings.

An inductively powered device driver comprising a secondary winding to be coupled to a primary winding and a ferrite core formed of two separable parts, and further comprising a permanent magnet attached to each part of the ferrite core. The permanent magnet(s) are preferably separated from the ferrite core by an insulator. One part of the ferrite core preferably comprises a metal plate positioned between the two parts of the ferrite core.