170 results about "Litz wire" patented technology

A multilayer printed circuit board (“PCB”) coil that simulates a coil formed from litz wire. The PCB includes a plurality of alternating conductor and insulating layers interconnected to cooperatively form the coil. Each conductor layer includes a trace that follows the desired coil shape and is divided into a plurality of discrete conductor segments. The segments are electrically connected across layers to provide a plurality of current flow paths (or filaments) that undulate between the layers in a regular, repeating pattern. The coil may be configured so that each filament spends a substantially equal amount of time in proximity to the paired coil and therefore contributes substantially equally to the self or mutual inductance of the coil. Each conductor layer may include a plurality of associated traces and intralayer connector that interconnected so that each filament undulates not only upwardly/downwardly, but also inwardly/outwardly in a regular, repeating pattern.

Nuclear magnetic resonance (NMR) signals are detected in microtesla fields. Prepolarization in millitesla fields is followed by detection with an untuned dc superconducting quantum interference device (SQUID) magnetometer. Because the sensitivity of the SQUID is frequency independent, both signal-to-noise ratio (SNR) and spectral resolution are enhanced by detecting the NMR signal in extremely low magnetic fields, where the NMR lines become very narrow even for grossly inhomogeneous measurement fields. Additional signal to noise benefits are obtained by use of a low noise polarization coil, comprising litz wire or superconducting materials. MRI in ultralow magnetic field is based on the NMR at ultralow fields. Gradient magnetic fields are applied, and images are constructed from the detected NMR signals.

An sealing system includes a frame, a ferrite core disposed within the frame, and a litz wire coil disposed proximate to the ferrite core for producing an electromagnetic field within the ferrite core, where the ferrite core and litz wire coil are adapted to direct the electromagnetic field toward a foil to seal an opening of a container with the foil. The sealing head is air cooled within the induction sealing unit.

An upper frequency-range circuit (160) includes a load element (168) exhibiting a capacitive load impedance. A first matching network (166) includes at least one nano-scale Litz wire (100) inductor. The first matching network (166) exhibits an inductive reactance that nominally matches the capacitive load reactance. An electrical conductor for providing connections for radio-frequency signals includes a plurality of nano-scale conductors (120) that are arranged in the form of a Litz wire (100). In one method of making a Litz wire (142), a plurality of carbon nanotubes (144) is placed on a substrate (146). The carbon nanotubes (144) are woven according to a predefined scheme so as to form a Litz wire (142). An inductor may be formed by manipulating the Litz wire (100) to form a coil (150).

A superheated steam generator, capable of generating superheated steam which exceeds 400° C. even if a litz wire is adopted as an induction heating coil, and capable of being used as a middle-sized or small-sized home-available apparatus, is provided. The invention provided a superheated steam generator in which induction heating elements 22 which generates heat by electromagnetic induction are housed in a heat-resistant container 21, a hose 24 which allows cooling water to pass therethrough is wound around an outer peripheral surface of the heat-resistant container, a water supply unit 4 for the cooling water is connected to one end of the hose, the other end of the hose is connected to a steam inlet 21A of the heat-resistant container, an induction heating coil 25 is mounted on an outer peripheral surface of the hose, a high-frequency power supply unit 3 is connected to the induction heating coil.

A planar coil component includes terminal metal fittings that include a crimping part, a terminal parts and a junction, and a bobbin on which a winding is wound. The bobbin has a terminal board including insertion holes. The terminal part is inserted from an upper surface of the terminal board into the insertion holes with the junction exposed, so that the terminal part projects from a bottom surface of the terminal board, each end of the winding is inserted into the crimping part through a slot in the bottom surface of the terminal board, and crimped. The winding is one of a litz wire, a stranded wires and a parallel wire, and welded at an end tip and connected to the terminal metal fitting.

An electric motor or generator assembly includes a component, such as a stator, having a plurality of windings. A wire set including a plurality of individually conductive wires twisted together is manipulated within a core to establish the desired number of windings having the desired cross sectional area. In one example, a plurality of such wire sets are manipulated simultaneously to establish the windings. Litz wire is one example type of wire set that is useful in an assembly designed according to this invention. There are more than 100 individual wires within each winding according to one example stator designed according to this invention.

The present invention provides an induction heating apparatus including a fixing belt that heats an unfixed image on recording paper, an excitation coil that induction-heats the fixing belt, an inverter circuit that supplies power to the excitation coil, a harness that electrically connects the excitation coil and the inverter circuit. The harness is constructed of a litz wire having a resistance of the harness section of 0.016 Ω or below formed by stranding several tens of wires which are conductive wires coated with an insulator into a predetermined thickness.

Transmission of power at low frequencies, e.g. less than 1 MHz The power can be transmitted in various ways, using different structures included stranded wire such as Litz wire. The inductor can also use cores of ferrites for example. Passive repeaters can also be used.

A winding of an electric machine is provided, where the winding includes at least one series of serially connected AC bars. Each AC bar includes a series of serially connected turns formed by litz wire having a plurality of strands, and at least one cooling tube. Individual strands of the plurality of strands are respectively positioned substantially adjacent to the at least one cooling tube at at least one transfer point for providing heat transfer from the respective individual strands to the at least one cooling tube.

The invention provides a coupling coil of a wireless charging system and a preparation method of the coupling coil. The method comprises the steps of (S1) determining a coupling coefficient of the coupling coil; (2) determining an inductance value of the coupling coil and working current of the coupling coil according to the coupling coefficient; (S3) determining the Litz wire specification according to the working current of the coupling coil; and (S4) determining the number of turns of the coupling coil according to the inductance value of the coupling coil. The complicated work of designing the coupling coil of the wireless charging system is decomposed into a few of steps; the overall design process is clear and distinct; the operability is high; through the scheme designed by the invention, the technical indexes can be met; and relatively high power transmission efficiency can be achieved through selecting an optimal design scheme.

The invention discloses a loosely coupled transformer device for wirelessly charging an electric vehicle. The device comprises an emission module, a reception module and two shielding cover plates, wherein the emission module and the reception module are coupled to each other. According to the technical scheme of the invention, the magnetic leakage at the back of a transformer can be well shielded by the shielding cover plates. Meanwhile, a magnetic conductive core structure is arranged in each shielding cover plate, so that the flow direction of the magnetic leakage at the back of the transformer can be guided by the magnetic conductive core structure. The coupling coefficient of primary and secondary sides is increased. Meanwhile, the loss of the cover plates is reduced and the efficiency of the whole device is improved. At the same time, a plurality of strands of litz wires are connected in parallel to form a coil, so that the coil loss of the transformer is reduced. A strip-shaped magnetic core reduces the weight of the transformer and increases the coupling coefficient of primary and secondary sides. By means of an insulating plate, the magnetic core and the coil can be conveniently fixed. Therefore, the above transformer device is good in shielding performance, simple, firm, high in coupling coefficient of primary and secondary sides, and high in overall efficiency. As a result, the device is very suitable for the wireless charging of electric vehicles.

Systems and methods for a twisted rectangular litz wire for generating or receiving wireless electrical power. The rectangular litz wire may be arranged as a DD coil having first and second co-planar loops. The loops may have a shared single-stacked inner portion and double-stacked outer portions. The litz wire may be twisted between the inner and outer portions, such that a width of the coils at the outer portions is defined by a first longer side of the wires, and a width of the coils at the inner portion is defined by a second shorter side of the wires. This arrangement may reduce a size of the DD coil may reducing a width of the shared inner portion.