A Fault Current Limiter (FCL) comprising a magnetisable limb, an electrically conductive coil associated with the magnetisable limb and arranged to induce a field in the limb member and magnets spaced such that the coil is positioned intermediate the spaced magnets. Magnetisable shield elements are positioned at either end of the coil.

A fault current limiter of the type having at least one elongated core biased magnetically towards saturation by means of a surrounding magnetic field, and an AC coil surrounding the core, the fault current limiter including: an elongated core having a variable cross section along the axis of the core in the vicinity of the AC coil, providing increased saturation of the core and enhanced fault current limiting for a lower DC bias.

A magnetoelectric device includes at least one reluctance component, at least one damping capacitor, and a switching circuit. The reluctance component includes a capacitive and inductive magnetic core unit having a loop-shaped first segment and a second segment connected to the first segment, and at least one coil wound around and loosely coupled to the magnetic core unit. The damping capacitor cooperates with the coil to form a resonant circuit. The switching circuit makes and breaks electrical connection between the coil and a DC power source so that an eddy current flowing through the resonant circuit may be generated for storing energy in the damping capacitor.

An AC permanent magnet gain transformer device adds permanent magnet or permanent magnet assembly to a traditional transformer structure, the permanent magnet magnetic pole surface closely clings to laminated iron core, so that the intrinsic permanent magnetic potential could be elicited under the excitation of the primary winding excitation current, overlapped and compounded with excitation magnetic potential in the general magnetic loop of closed-loop laminated iron core, and so, it's able to induce the induction electromotive force formed after the superposition of excitation flux and permanent magnet flux at the secondary winding output end. The method for voltage regulation and control is to: input a certain amplitude of pulse current to the primary winding to guarantee the generation of compound excitation effect, and change the pulse count of pulse current per unit time to change and adjust the input and output power of this AC permanent magnet gain transformer device.

A filtering assembly includes N alternating current metal bars, a boost metal bar, and a magnetic ring. At least some of the N alternating current metal bars are stacked, N being an integer greater than 1. The boost metal bar is disposed at a side of the N alternating current metal bars. The magnetic ring surrounds the N alternating current metal bars and the boost metal bar, where in the magnetic ring, the N alternating current metal bars are spaced apart from and opposite to the boost metal bar.

A home appliance includes an inductor to which a bias magnet is applied. The inductor of the home appliance may include a core including an air gap in a first leg, and a coil wound around at least a part of the core such that flux flows through the first leg. An upper magnet is positioned above the air gap in the first leg, and a lower magnet is positioned below the air gap in the first leg. In this regard, a direction of flux by the coil may be opposite to a direction of flux by the upper magnet and the lower magnet.

A sensor device includes: a sensor that performs sensing, the sensor being disposed between a surface of a target object, which is a magnetic metal member serving as a sensing target, and a magnet, and being fixed to the surface of the target object by an adsorption force due to a magnetic force generated between the magnet and the target object; and a non-magnetic cover member that is fixed to the surface of the target object in a state where a plurality of members including at least the magnet and the sensor are stored inside the cover member as stored members.

A transformer includes a magnetic core, a first coupling terminal, a second coupling terminal, a first winding, and one or multiple second windings. The magnetic core includes two opposed base parts, and five leg parts including first to fifth leg parts disposed within opposed surfaces of the base parts and magnetically coupling the base parts. The second and third leg parts are disposed with the first leg part interposed therebetween in a first direction. The fourth and fifth leg parts are disposed with the first leg part interposed therebetween in a second direction. The first winding is, in a direction from the first coupling terminal to the second coupling terminal, wound around the first to third leg parts in a first winding direction, and around the fourth and fifth leg parts in a second winding direction. The second winding/windings is/are wound around the leg parts except the first leg part.