A tank for electrical equipment such as power transformers and shunt reactors has integral stiffeners for reinforcing the tank during overpressure conditions, such as during an arc fault. The stiffeners are formed of a material that is more ductile than the material to which the stiffeners are attached, such as the tank walls and cover. The tank with integral stiffeners allows for expansion of the internal volume of the tank during overpressure conditions, thus, increasing the flexibility of the tank and mitigating the risk of tank rupture.

A cellulose based pressboard for insulation in an electrical power transformer, the pressboard includes polyvinylamine (PVAm), and polyacrylamide (PAM), in a combined amount of between 0.01% and 20% by weight of the pressboard.

A non-contact communication coil for a non-contact power feeding device comprises a power transmission coil, a power receiving coil, and a resonance coil, and the non-contact communication coil includes a first receiver and a second receiver connected in series with the first receiver. The non-contact communication coil generates induction voltages in mutually opposing directions in the first receiver and the second receiver when current passes through at least one of the power transmission coil and the power receiving coil.

Presented herein are methods and apparatus for biasing magnetic circuits to reduce audible noise from a switching power supply. A magnetic component (e.g., a magnet) is constructed and provided to a core (e.g., a ferromagnetic core) to offset (i.e., bias) an applied magnetomotive force. By selecting and/or manufacturing the magnetic component based on a circuit operating condition, the offset may be tailored to advantageously shift a frequency of mechanical deformation outside the audible noise range. In a switching power supply with fixed peak current, the offset to the applied magnetomotive force may be determined, at least in part, by the fixed peak.

A wireless power transmitter is electromagnetically coupleable to a receiving coil of a wireless power receiver to provide power wirelessly and includes a substantially planar transmitting core. A transmitting coil has a plurality of windings and is disposed on a surface of the transmitting core. The transmitting core may extend beyond the transmitting coil in a planar direction.

An electronic component includes an element body and outer electrodes on the element body. The element body includes top and bottom opposed surfaces, and side surfaces connecting the top and bottom surfaces. An outer electrode includes a lower layer electrode on the top surface and the bottom surface, and an upper layer electrode overlying the lower layer electrode and extending from an upper side of the lower electrode onto the side surface. When viewed from a direction orthogonal to the top and bottom surfaces, an edge of the lower layer electrode is disposed at a position farther from the side surface at which the upper layer electrode is provided than a position of an edge of the upper layer electrode, and a radius of curvature of the edge of the lower electrode is larger than a radius of curvature of the edge of the upper layer electrode.

An electronic component includes an element body and outer electrodes on the element body. The element body includes top and bottom opposed surfaces, and side surfaces connecting the top and bottom surfaces. An outer electrode includes a lower layer electrode on the top surface and the bottom surface, and an upper layer electrode overlying the lower layer electrode and extending from an upper side of the lower electrode onto the side surface. When viewed from a direction orthogonal to the top and bottom surfaces, an edge of the lower layer electrode is disposed at a position farther from the side surface at which the upper layer electrode is provided than a position of an edge of the upper layer electrode, and a radius of curvature of the edge of the lower electrode is larger than a radius of curvature of the edge of the upper layer electrode.

A multilayer filter includes first and second ground electrodes and first and second LC resonators. The first LC resonator includes a first line electrode, a first capacitor electrode, a first via conductor, and a second via conductor. The second via conductor extends from the first line electrode to a first capacitor electrode side and connects the first line electrode and the first ground electrode. The second LC resonator includes a second line electrode, a second capacitor electrode, a third via conductor, and a fourth via conductor. The fourth via conductor extends from the second line electrode to a second capacitor electrode side and connects the second line electrode and the second ground electrode.

An inductor device includes a first coil, a second coil and a toroidal coil. The first coil is partially overlapped with the second coil in a vertical direction. The toroidal coil is disposed outside the first coil and the second coil. The first coil is interlaced with the second coil at a first side and a second side of the inductor device.

The present application provides a packaged gate drive circuit having a transformer. The transformer which is used to transfer both signals and power from a primary side to a secondary side. The windings of the transformer are formed using a combination of tracks and wirebond wires. The transformer is positioned in a well formed using a first insulating material and covered with a second insulating material.