82results about "Fixed inductances without magnetic core" patented technology

A fault current limiter (FCL) comprises: an air core flat clock spiral inductor comprising wound electrically conductive material and insulated turns; and two terminations configured for attaching the spiral inductor in series with a power carrying conductor.

An air core, dry type, power reactor (10) of the type having multiple concentrically positioned winding layers (12) extending along a central axis and above arms (24) of a first spider unit (16) when the reactor is horizontally positioned with respect to a horizontal ground plane, the winding layers (12) arranged in spaced-apart relation providing air gaps (20) between the winding layers allowing air to flow along the winding layers. A deflector (40) is positioned between the winding layers (12) and the ground plane to receive air from wind blowing toward the reactor (10) and guide the air in an upward direction from the deflector (40) and along the gaps (20).

A high voltage dry-type reactor is series-connected via a first terminal to an AC supply voltage and via a second terminal to the AC phase terminal of a high voltage converter and includes a cylindrical coil of insulated wire. In order to protect the reactor from a damaging DC field, the reactor further includes a metallic or resistive electrostatic shield which is connected to a same DC potential as the converter.

An electrostatic screen (17) for an HVDCT component (1), the connections (11, 12) of which are at a higher potential than earth (15) during operation, in particular for an HVDCT air-cored induction coil, is distinguished by a casing (18) which is provided at at least one end with a collector electrode (19, 20) which runs essentially over its circumference, for connection to one of the connections (11, 12) of the HVDCT component (1), wherein the casing (18) is manufactured from a sheet (22) of electrostatically dissipative material having a surface resistance in the range from 109 to 1014 ohm/units square.

A reactor includes a core body; a first end plate and a second end plate which sandwich and fasten the core body; and a plurality of axis portions disposed in the vicinity of an outer edge portion of the core body or outward of the core body and supported by the first end plate and the second end plate.

Air core reactor includes a coil connected between first and second terminals. The coil is made of a succession of bundles of conductor (B1, B2, B3, . . . , BN) connected in series along an axis between the first terminal and the second terminal. Each bundle is made of one wire wound around the axis to form a multi-layer winding having a cross-section of N winding layers in a direction perpendicular to the axis, from a winding layer of rank 1 which is the closest to the axis to a winding layer of rank N which is the furthest from the axis. Each perpendicular winding layer includes several winding layers in the direction of the axis. The number of axial winding of the perpendicular winding layer of rank j (j=2, . . . , N) is equal or less than the number of axial winding layers of the perpendicular winding layer of rank j−1.

A DC-DC converter module includes a multi-layer substrate, a switching IC, and a coil. The multi-layer substrate includes component mounting electrodes provided on the top surface and an input terminal, an output terminal, and ground terminals provided on the bottom surface. The switching IC switches an input voltage and includes an input electrode, an output electrode, and a ground electrode, and is mounted on the top surface of the substrate by connecting the electrodes to the component mounting electrodes. The coil is arranged within the multi-layer substrate in a spiral shape with an axis extending in the substrate stacking direction. The bottom surface side end of the coil is connected to the input/output electrode of the switching IC.

In the winding wire at the winding completion end side, two wires are piled up vertically and wound together from the inner circumferential side towards the outer circumferential side. The winding wire at the winding start end side that has remained on the inner circumferential side is drawn forth from the inner circumferential side to the outer circumferential side so as to form a curve along the flat surface of the coil. In the crossing portions of the winding wire at the winding completion end side and the winding wire at the winding start end side, the two wires of each winding wire are superimposed and caused to cross each other in a state in which the wires are laid down transversely.

A method and apparatus for an air core reactor including a plurality of straight members and a plurality of offset members, the plurality of straight and offset members are interconnected to form an orthogonal spiral having an air core therethrough.

A fault current limiter, including: an inductor, a direct current circuit breaker, a shunt resistor, and a first fixed resistor. The inductor includes wound superconducting wires. The direct current circuit breaker and the inductor are connected in series to form a series branch. The shunt resistor is connected in parallel to the series branch. The first fixed resistor is connected in parallel to the direct current circuit breaker.

A noise mitigating sound shield comprises an assembly configured for attachment to an air-core dry-type reactor. The assembly is configured for forming a closed cylinder positioned radially outward from an outermost surface of a reactor build of the air-core dry-type reactor. The assembly includes a noise attenuating barrier having an innermost surface. No portion of the outermost surface of the reactor build directly contacts the innermost surface of the noise attenuating barrier limiting structure-borne sound transmission from the reactor build to the noise attenuating barrier.

The invention discloses a heat radiation device for an air reactor. The heat radiation device comprises a cabinet, a fan and the air reactor, and the air reactor is positioned in the cabinet. A lateral side of the cabinet is provided with an air passage port, and the fan is connected to the lateral side and used for blowing inwards the cabinet through the air passage port. By the fan for providingconvection air into the cabinet, heat generated by a coil of the air reactor can be taken out by air motion in the air reactor and air motion in a space between the cabinet and the air reactor. The heat radiation device for the air reactor is simple in structure, high in heat radiation completeness and uniformity and small in size.

The invention relates to an inductance coil, particularly an inductance coil without iron core for use in electric power grids, comprising at least two cylindrical winding layers (1), which are disposed concentrically with respect to a coil center line (7) and are connected electrically in parallel. The inductance coil comprises at least one means for reducing or minimizing sound emissions developing during operation of the inductance coil. At least the outermost winding layer (1) is designed as a current-conducting, acoustic shield winding (18) with respect to the winding layer (1) adjoining in the direction of the center line (7), wherein the shield winding (18) is dimensioned electrically such that it is designed for the transmission of a current intensity which is between the 0.1% to the maximum 50% of the current intensity transmitted by the adjacent winding layer (1) towards to the direction of the coil center line (7). The invention further relates to a clamp-like retaining element disposed on at least one face end of the inductance coil for reducing sound emissions.

The invention discloses an inductor and a manufacturing method thereof. The method comprises the following steps: forming at least one array unit on a magnetic core block, wherein coil wires which are the same in number and arranged linearly are embedded in two coil areas respectively, and electrode wires are embedded in two electrode areas respectively; cutting to obtain magnetic core slices; connecting the electrode leads of the two electrode areas and the coil leads of the two coil areas on the first cutting surface of the magnetic core slice by using a first conductive connecting wire; connecting the coil wires of the two coil areas on the second cutting surface of the magnetic core slice by using a second conductive connecting wire; respectively filling the first cutting surface and the second cutting surface with magnetic powder, and carrying out compression molding to form a first magnetic core and a second magnetic core; forming an electrode hole in the first magnetic core, and filling a metal material; forming an electrode plate on the first magnetic core; and segmenting the magnetic core slices according to the array units to obtain at least one inductance unit. The manufacturing method is beneficial to manufacturing of small-size inductors and batch production of inductance elements.

An air core reactor for use in an electric power transmission and distribution system or in an electric power system of an electrical plant is provided. The air core reactor comprises an electrically insulated support structure, an outer surface of a coil of windings configured to operate at a potential and isolated to ground or other potentials by the electrically insulated support structure and a projectile resistant cylinder that attaches directly to the outer surface of the coil of windings. The projectile resistant cylinder is configured as an integrated barrier to provide a first measure of survivability to the air core reactor such that the integrated barrier enables a continued operation of equipment after a threat has been eliminated.

The multiple winding inductor assembly includes a first core piece, a second core piece, a first conductor, and a first core assembly. The first core assembly includes a third core piece and a second conductor. The first and second conductors, together with the first, second, and third core pieces, form multiple inductors that, when working individually, do not cause mutual inductance on those not at work, thereby avoiding energy consumption. In addition, the inductor assembly may be extended in only one direction when cascading more inductors, facilitating circuit design and layout, and the configuration of the inductor assembly on the circuit board.