4237results about "Inductances" patented technology

An apparatus for use in a magnetic induction wireless power transfer system comprises at least one booster coil positioned adjacent an active coil of a magnetic induction wireless power transfer system and a capacitor electrically connected to the booster coil. A capacitance of the capacitor is selected such that a current in the booster coil is approximately equal to a current in the active coil during wireless power transfer. The apparatus may comprise at least one shielding coil positioned adjacent an active coil of a magnetic induction wireless power transfer system, a capacitor electrically connected to the shielding coil, and a conductor positioned adjacent the shielding coil opposite the active coil. The conductor encompasses the shielding coil.

A device to-be-charged and a wireless charging method are provided. The device to-be-charged includes a receiving coil, a first charging unit, and a second charging unit. The receiving coil includes a first end, a second end, and a middle tap. The first charging unit is coupled with the first end and the middle tap of the receiving coil and configured to convert an electromagnetic signal received at the first end and the middle tap into a first voltage and a first current for charging a battery. The second charging unit is coupled with the second end and the middle tap of the receiving coil and configured to convert an electromagnetic signal received at the second end and the middle tap into a second voltage and a second current for charging the battery.

An amplifier circuit including a first amplifier having a first amplifier input and a first amplifier output and a transformer including a first transformer component having a first primary winding in series with the first amplifier output and a first secondary winding coupled to the first amplifier input. The first primary winding and the first secondary winding are arranged such that a portion of a first magnetic field generated by the first primary winding couples to the first secondary winding through a first magnetically coupled feedback loop. The transformer further includes a second transformer component having a second primary winding in series with an output of a second amplifier and a second secondary winding coupled to an input of the second amplifier input. A portion of a second magnetic field generated by the second primary winding couples to the second secondary winding through a second magnetically coupled feedback loop.

To provide a full-rotation type non-contact power transmission connector device.SOLUTION: A full-rotation type non-contact power transmission connector device includes a power supply module a full-bridge inverter module, a primary-side resonance compensation module, a full-rotation type ball connector module, a secondary-side resonance compensation module, and a full-bridge rectification module. The power supply module supplies a supply voltage required for the device. The full-rotation type ball connector module provides radial rotation between a ball head device and a ball seat device, and a receiving coil and a transmitting coil are located in the ball head device and ball seat device, respectively. The primary- and second-side resonance compensation modules include primary- and secondary-side LCC reactive power compensation modules and primary- and secondary-side coil capacitors.SELECTED DRAWING: Figure 6

The utility model discloses a current transformer, which relates to the technical field of current measurement, and comprises a current transformer body, the upper surface of the current transformer body is fixedly connected with two connecting pieces, one side of the current transformer body is provided with an adjusting structure, and the adjusting structure comprises a long rod. One end of the long rod is fixedly connected with the current transformer body, the arc surface of the long rod is slidably connected with a long pipe, the arc surface of the long pipe is rotatably connected with a screw rod, the arc surface of the screw rod is in threaded connection with a connecting plate, the lower surface of the connecting plate is fixedly connected with an adjusting rod, and the lower end of the adjusting rod is fixedly connected with a limiting plate. According to the current transformer, the effect that the current transformer body can flexibly move forwards, backwards, leftwards and rightwards within a certain range of a distribution box is achieved, and the problem that the current transformer body is relatively fixed after being installed, so that holes need to be formed again for installation after the line layout in the distribution box is changed, and the overall complexity degree is improved is solved.

A charging bench includes three coils that partially overlap, in superposed planes. An electrical feed makes it possible to supply the coils with an AC current from the mains. A portable device to be charged is placed on the upper side of this charging bench. This device includes a winding intended to receive the electrical charging, and a ferrite protective screen. One of the coils (Bb) is selected to emit the magnetic charging flux toward the mobile phone. The selection is carried out via the emission of a series of pulses by at least one of the coils and comparison of return signals with a reference threshold. This comparison also enables one of the other coils (Ba, Bc) to be selected or both of these other two coils (Ba, Bc) to be used to receive a flux for communicating information originating from the portable device to be charged.

A magnetic component and a switch power supply device are disclosed. The magnetic component includes a magnetic core and at least three windings, the magnetic core including at least three winding columns, at least one side columns, a first cover plate and a second cover plate opposite to each other, wherein the at least three winding columns are sequentially arranged in adjacent, the first cover plate and the second cover plate are respectively at upper parts or lower parts of the at least three winding columns and the at least one side column to form a closed magnetic flux loop; the at least three windings are wound on the at least three winding columns, respectively; wherein magnetic flux direction of the middle winding column in adjacent three winding columns is opposite to magnetic fluxes direction of the other two winding columns in adjacent three winding columns.

A two-transistor flyback topology in which a portion of leakage inductance energy in the transformer is extracted and used to obtain zero voltage switching on both switching elements in any operating conditions, and in which a third low power switch eliminates parasitic oscillations and allows an operation at a determined frequency. In this topology, there are no switching losses and there are no spikes or glitches in any switching node, eliminating the need for snubbers. This topology is an “ideal two transistor flyback topology.”

A magnetic alignment system can include a primary annular magnetic alignment component and a secondary annular magnetic alignment component. The primary alignment component can include an inner annular region having a first magnetic orientation, an outer annular region having a second magnetic orientation opposite to the first magnetic orientation, and a non-magnetized central annular region disposed between the primary inner annular region and the primary outer annular region. The secondary alignment component can have a magnetic orientation with a radial component. Additional features, such as a rotational magnetic alignment component and / or an NFC coil and circuitry can be included.

A multiport current sensor is disclosed for measuring current. The sensor may include multiple CT or Rogowski coil segments or sections arranged in a closed loop configuration around a monitored phase line or other electrical conductor. An adjacent phase rejection circuit compares the magnitudes and / or phase angles of the voltage signals from the multiple coil segments. The adjacent phase rejection circuit may detect if a fault in an adjacent phase line or other electrical conductor is affecting the output signal of the current sensor by more than a threshold amount. The adjacent phase rejection circuit may additionally or alternatively indicate whether the measured values are valid for detecting a fault on the monitored phase line or other electrical conductor.

The invention discloses a high-voltage voltage transformer for state grid metering, which relates to the technical field of voltage transformers and comprises a U-shaped mounting frame, a mounting square tube is fixedly mounted on one side of the U-shaped mounting frame, a sliding bottom plate is slidably connected into the U-shaped mounting frame, and a voltage transformer body is fixedly mounted at the top of the sliding bottom plate. Insulating porcelain bushings are arranged at the top of the voltage transformer body, the tops of the two insulating porcelain bushings are rotationally connected with rotating mounting frames, brake bars are fixedly mounted on the outer sides of the rotating mounting frames, and connecting contacts are fixedly mounted at the bottoms of the sides, away from the rotating mounting frames, of the brake bars. When the wiring ring is used, the position limitation of the wiring ring can be removed by directly pushing the sliding button, and the wiring ring is only required to be sleeved on the outer side of the wiring post and pressed during installation, so that the wiring is more convenient and quicker compared with the mode that a screw is directly used for fixing.

A wireless power reception system includes a power transmission device, a power reception device, a wheel with a rim, and a tire mounted on the rim. The tire includes a bead core and a bead filler, a tire width direction cross-sectional area S1 of the bead filler is one to eight times a tire width direction cross-sectional area S2 of the bead core, the power transmission device can transmit electric power with a frequency of 1000 kHz or less wirelessly, the power reception device is disposed farther inward in the tire radial direction than a tread portion of the tire, the power reception device receives the electric power wirelessly from the power transmission device in a state such that the power transmission device is located farther outward in the tire radial direction than the tire, and the tread portion of the tire is formed from a non-magnetic material.

The invention discloses a Rogowski coil current transformer and a current measurement system, and relates to the technical field of current measurement. The Rogowski coil current transformer comprises a Rogowski coil and a signal processing circuit; the differential signal is converted into a differential constant-current signal to be output based on a signal processing circuit; the signal processing circuit comprises an integral amplification module for performing integral amplification on the differential signal based on the integral amplification module; the first direct current component removing module is used for removing a direct current component in the voltage signal after integral amplification based on the first direct current component removing module; the signal adjusting module is used for realizing amplitude in-phase amplification and phase compensation; the single-ended to differential output module is used for generating symmetrical differential voltage signals based on the single-ended to differential output module; and the conversion module is used for converting the symmetrical differential voltage signal into a differential constant current signal and outputting the differential constant current signal based on the conversion module. And through the integral amplification module and the phase compensation module, the differential signal is accurately converted into the current signal, so that the current measurement result is more accurate.

The invention discloses a voltage balancing device of a 10KV three-element combined mutual inductor and a using method of the voltage balancing device, and relates to the technical field of mutual inductors. The voltage balancing device of the 10KV three-element combined mutual inductor comprises a first mutual inductor shell, the voltage balancing device comprises a second mutual inductor shell, a voltage mutual inductor is installed in the first mutual inductor shell, and a current mutual inductor is installed in the second mutual inductor shell. The front end of the first mutual inductor shell is fixedly connected with a mutual inductor junction box, a voltage stabilizer is installed outside the first mutual inductor shell, and by means of Y-shaped connection of a secondary winding of the voltage mutual inductor and use of a circuit breaker and the voltage stabilizer, voltage balance of the voltage mutual inductor is facilitated; the Y-shaped connection can guarantee three-phase balance while providing a stable power supply, has an effect of absorbing harmonic waves, improves the power supply efficiency, avoids equipment damage caused by overload, and guarantees good operation of low-voltage power grid protection.

A system for inductive energy transfer may include a stationary induction charging device including a stationary energy coil, a mobile induction charging device including a mobile energy coil, and a positioning device configured to detect a positioning of the stationary energy coil and the mobile energy coil relative to one another. During a charging operation of the system, one of energy coils may provide an alternating magnetic field which induces a voltage for energy transfer in the other energy coil and / or the induction charging devices may be disposed spaced apart from one another in a height direction. The positioning device may include i) four transmission coils in one of the induction charging devices and ii) at least one receiver in the other induction charging device. The transmission coils may, during a positioning operation, provide positioning fields that are distinguishable from one another.

The invention discloses a large-current inductor based on thermal actuation multidirectional sealing compensation, and particularly relates to the technical field of inductor parts, the large-current inductor comprises an inductor lower cover, an inductor upper cover, two sliding strips and a multidirectional compensation piece, and the inductor upper cover is arranged above the inductor lower cover; the two sliding strips slide on the inner wall of the inductor lower cover; and one side of each sliding strip is provided with a multidirectional compensation piece. Through the multidirectional compensation piece, the multidirectional compensation mechanism obviously enhances the adaptability of the joint of the inductor upper cover and the inductor lower cover to thermal deformation in different directions, so that the sealing compensation capability of the inductor under multidirectional thermal expansion and cold contraction is more excellent, and the sealing durability of the inductor shell is greatly improved; therefore, the problems that the sealing compensation capacity of the inductor is insufficient under multi-directional thermal expansion and cold contraction, and the sealing durability of the inductor shell is poor are solved.

The invention relates to a device (100) for wireless electrical power and / or communication transmission for an electric machine (50), in particular for a separately excited synchronous machine, comprising at least a first transmission unit (10, 12) which is arranged stationary in spatial proximity to the electric machine (50), in particular on a housing (52) of the electric machine (50), and a second transmission unit (20, 22) which is arranged on a rotating part (54), in particular a shaft (56), of the electric machine (50). The first transmission unit (10, 12) and the second transmission unit (20, 22) are configured for capacitive and inductive coupling by means of electric and / or magnetic and / or coupled electromagnetic fields, wherein the first transmission unit (10, 12) and the second transmission unit (20, 22) are resonantly tuned to each other.The first transmission unit (10, 12) and the second transmission unit (20, 22) are optionally configured as a transmitting unit (14) or as a receiving unit (24) during operation of the electric machine (50). The invention further relates to an electric machine (50) with a device (100) and a drive system (200).

A power reception device includes: a housing including a first surface facing in a first direction, a second surface facing in a second direction opposite to the first direction, and a side surface surrounding a space between the first surface and the second surface; a coil antenna wound in a circle; a shielding sheet disposed over the coil antenna; and a first magnet and a second magnet adjacent to an outermost coil of the coil antenna and disposed to be spaced apart from the outermost coil. The first magnet is disposed so that a portion of magnetism induced by the first magnet is formed in the first direction. The second magnet is disposed so that a portion of the magnetism induced by the second magnet is formed in a third direction that is an outside direction from a center of the coil antenna.

The invention discloses a current transformer with high wire clamping strength, which comprises a body and a primary side threading hole through which a cable penetrates, two ends of the body extend outwards to be provided with a shell, a core tube is sleeved in the primary side threading hole, two ends of the core tube are respectively provided with a head end clamp and a tail end clamp, the head end clamp comprises a limiting disc, a sliding rod, a guide disc and a tripping unit, and the limiting disc is arranged on the sliding rod. The tail end clamp comprises an execution cylinder, a guide ring and a pushing unit, the pushing unit comprises a helical tooth plate and an arc-shaped plate, a guide hole is formed in the side wall of the guide body, the helical tooth plate is installed in the guide hole, the arc-shaped plate is fixedly arranged at the end of the helical tooth plate, and the guide ring is arranged in the arc-shaped plate. When the execution cylinder is screwed, the core tube drives the sliding rod to move to achieve clamping, the tripping unit relieves force application, and the pushing unit clamps the cable and pushes the cable to be straightened. The cable clamping device is suitable for cables of different thicknesses, clamping is stable, potential safety hazards are reduced, the measurement precision is improved, the cables are clamped and fixed in the middle, bending is avoided, and the measurement precision is guaranteed.

The utility model relates to current transformer body ring part main insulation wrapping and overturning equipment, an overturning fixing mechanism comprises an overturning seat, first supports are arranged on two sides of one end of the overturning seat, second supports are arranged on two sides of the other end of the overturning seat, first clamping assemblies are arranged on the first supports and the second supports, and second clamping assemblies are arranged on the second supports. The first clamping assemblies are arranged on the two sides of the middle of the turnover base and provided with movable first clamping blocks, the second clamping assemblies are arranged on the two sides of the middle of the turnover base and provided with movable second clamping blocks, the moving direction of the second clamping blocks is perpendicular to the moving direction of the first clamping blocks, the turnover driving mechanism is arranged on the moving base, and the turnover base is arranged on the turnover driving mechanism. According to the device, the ring part of the transformer body can be turned over conveniently and quickly, the production efficiency is improved, and meanwhile, the main insulation binding process is not influenced.

A coil assembly for wireless electrical power transmission includes a plurality of external connecting terminals, a power feeding coil, a resonant capacitor electrically connecting with the power feeding coil, and busbars each of which electrically connects between the external connecting terminals.

An electronic device in a wireless power system may be operable with a removable accessory such as a case. The device may convey wireless power to, from, or through the case while the device is coupled to the case. The device may have coplanar power transmitting and power receiving coils. The removable accessory may have an embedded switchable ferrimagnetic core and a coil that overlaps the switchable ferrimagnetic core. The switchable ferrimagnetic core may be operable in a first state where the switchable ferrimagnetic core is unsaturated. The switchable ferrimagnetic core may be operable in a second state where the switchable ferrimagnetic core is saturated by a magnetic field from a permanent magnet in a wireless power transmitting device. In the second state, the switchable ferrimagnetic core may have a lower magnetic permeability and higher magnetic reluctance than in the first state.

The invention provides a magnetic core mutual inductor with a magnetic core convenient to replace, and relates to the technical field of magnetic core mutual inductors. The magnetic core mutual inductor with the magnetic core convenient to replace comprises a base. Through the matching design of the limiting blocks between the base sinking groove and the connecting seat and the circumferentially distributed limiting grooves, the connecting seat can be positioned along a plurality of preset angles, the magnetic core can be adaptively adjusted along with the angle of a mounting base plane, and the magnetic core can be quickly positioned and locked by adopting a quick locking structure that the upper shell and the lower shell are hinged and matched through a transverse and longitudinal dual positioning and locking mechanism. Opening and closing of the upper shell and the lower shell can be completed through one-hand operation, the disassembly and assembly time for magnetic core replacement or maintenance is greatly shortened, through collaborative design of a graphene heat conduction layer, a phase change heat storage layer and a flexible buffer layer, heat conduction and absorption capacity are enhanced, meanwhile, thermal expansion stress is counteracted through a flexible material, heat dissipation efficiency improvement and structural reliability are both considered, and the application range is wide. And the technical defects of high-temperature accumulation and material deformation easily caused by a single heat dissipation layer design are overcome.

According to one aspect of the present disclosure, a transformer based integrated circuit (IC) package includes a portion including a recess. In some embodiments, a magnetic core disposed in the recess, wherein the recess is configured to provide a space between an interior surface of the recess and an exterior surface of the magnetic core, wherein the magnetic core includes a soft ferromagnetic material. In some embodiments, two or more support structures disposed in the recess and connected to the magnetic core and package portion. In some embodiments, a plurality of conductive traces forming first and second coils disposed about the magnetic core, wherein the first and second coils and magnetic core are configured as a transformer. In some embodiments, a molding material is configured to encapsulate a surface of the package portion and the transformer, wherein the molding material is configured to form a package body.

The invention provides an electromagnetic voltage transformer, which relates to the technical field of high-voltage measurement of an electric power system, and comprises a transformer main body, a butt joint base is arranged below the transformer main body, two butt joint plug-in frames are fixedly connected below the transformer main body, and inner positioning flanges are arranged in the two butt joint plug-in frames. And unlocking assemblies are arranged in the two butt joint sockets. Through the arrangement of the clamping assembly, when the guide assembly is pushed to enable the clamping assembly to clamp a copper bar, counter-acting force can extrude a second elastic piece, so that a piston extrudes gas in a sliding groove, when the voltage transformer vibrates, the vibration frequency can be offset through the elastic force of the second elastic piece, and the clamping assembly is prevented from loosening; when the voltage rises and the current is increased to generate heat, and the gas in the sliding groove expands after being heated, the piston is synchronously extruded to move towards the copper bar direction, and the second elastic piece is extruded for adjustment, so that the vibration reduction effect is further improved, and the detection efficiency of the electric power system is improved.

An efficiently compensated Inductive Wireless Power Transfer (IWPT) system, comprising an LCT having a primary side and a secondary side; an inverter that converts the input DC power to AC power at a predetermined operating frequency, the output of the inverter is being connected to the self-inductance of the primary side of the LCT via a compensation network consisting of a combination of capacitors and at least one inductor and residing solely at the primary side; a rectifier for converting AC power, induced at the secondary side of the LCT, to DC power, the input of the rectifier is being connected to the self-inductance of the secondary side of the LCT; a load being connected to the output of the rectifier; a DC power supply for feeding DC power to the input of the inverter and generating an induced power that is fed to the load.

The invention provides a coil module and electronic equipment. Relates to the technical field of circuit boards. A high-speed signal line and a wireless charging coil are integrated in the same coil module. The coil module can comprise a substrate and a metal layer formed on one side of the substrate, the metal layer comprises a thick metal area, a thin metal area and a transition area located in a junction area of the thick metal area and the thin metal area, a wireless charging coil is arranged in the thick metal area, and a high-speed signal line is arranged in the thin metal area. The first nanocrystal and the second nanocrystal are oppositely arranged on the two sides of the substrate, at least part of the periphery of the wireless charging coil is covered with the first nanocrystal, the first nanocrystal extends to the position above the transition area, and at least part of the wireless charging coil is covered with the second nanocrystal. The integration level can be improved, space resources are saved, and the high-speed signal line and the wireless charging coil are pulled away through the transition area without affecting the signal quality of the high-speed signal line and the wireless charging coil.

The invention relates to the technical field of wireless charging, in particular to a self-adaptive wireless power transmission system and a receiver free positioning method thereof. The system is characterized in that a transmitting end comprises an inverter circuit, a transmitting end compensation network, a compensation network input detection circuit and an array transmitter, and the array transmitter comprises seven transmitting coils; the receiving end comprises a receiving coil, a receiving end compensation network and a load voltage detection circuit; the control system comprises a position prediction module and a fuzzy PID controller. The position prediction module is used for predicting the spatial position of the receiving coil by measuring a mutual inductance value between the transmitting coil and the receiving coil based on a neural network optimized by a seagull algorithm; and the fuzzy PID controller is used for acquiring the spatial position of the receiving coil, adjusting the excitation mode of the transmitting coil and the phase of an input signal of the inverter circuit, and optimizing the magnetic field distribution to compensate the offset influence. According to the invention, high transmission efficiency can still be maintained when the receiving coil deviates to a certain extent, and the anti-deviation capability is remarkably improved.

Certain aspects of the present disclosure are directed towards techniques and apparatus for implementing concurrent matching for a transmitter and a receiver. An example transceiver may include: a transformer having a primary winding and a secondary winding; a first amplifier having a first output coupled to the primary winding; a second amplifier having an input coupled to a first terminal of the secondary winding, wherein a second terminal of the secondary winding is coupled to an antenna port of the transceiver; and a first inductive element coupled between the first terminal of the secondary winding and a reference potential node.