6018results 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 wireless charging device is provided, including a charging base, a charging bracket and a charging cantilever. The charging bracket is rotatably connected to the charging base, and when the charging bracket is unfolded with respect to the charging base, the charging bracket couples with the charging base to position a second product. The charging cantilever is rotatably connected to the charging bracket, and the rotation axis of the charging bracket is parallel to that of the charging cantilever. The wireless charging device is versatile and flexible due to its three forms. In the first form, the wireless charging device is easy to carry and can charge the second product; in the second form, at least one of the first product and the second product can be charged; in the third form, at least one of the first product, the second product and the third product can be charged.

The invention relates to the technical field of current measurement, and discloses an open-close type current transformer which comprises a lower shell, one side of the top of the lower shell is rotatably connected with an upper shell, semicircular iron cores are embedded in the lower shell and the upper shell, a copper wire is wound on the iron core located in the lower shell, two ends of the copper wire are fixedly connected with butt joints, and the butt joints are fixedly connected with the upper shell. The butt joint is embedded in the outer wall of one side of the lower shell, the side, close to the butt joint, of the lower shell is rotationally connected with a mounting plate, butt joint rods are fixedly connected to the sides, close to the butt joint, of the two ends of the mounting plate, two limiting holes are formed in the mounting plate, and two limiting seats are fixedly connected to the side, close to the mounting plate, of the lower shell. Each limiting seat is aligned with the corresponding limiting hole in the same side, mounting grooves are formed in the tops and the bottoms of the limiting seats, limiting blocks are slidably connected into the mounting grooves, and the problem that due to the fact that the positive electrode and the negative electrode are reversely connected, wiring copper wires need to be detached, and then winding work needs to be conducted by replacing the positions, and operation is troublesome can be solved.

The invention discloses an anti-direct-current component nanocrystalline current transformer and a using method thereof. The anti-direct-current component nanocrystalline current transformer comprises a current transformer body, and a magnetic core hole penetrating front and back is formed in the middle of the front side of the current transformer body. The device is provided with a secondary side open circuit detection and protection mechanism, so that imbalance of a magnetic field in the mutual inductor caused by disconnection of a secondary loop is effectively prevented, iron core magnetic flux saturation and potential high electromotive force generation are avoided, the safety of the mutual inductor and peripheral equipment is protected, the risk of power system faults such as fire disasters or short circuits is reduced, and meanwhile, the safety of the mutual inductor is improved. A live wire centering fixing mechanism is arranged, so that the stable centering position of a wire in a magnetic core hole of the mutual inductor is ensured, magnetic field distribution is optimized, the magnetic leakage phenomenon is reduced, the accuracy and stability of current measurement are remarkably improved, meanwhile, measurement fluctuation caused by wire shaking is reduced, and the measurement precision is improved. And more accurate data support is provided for harmonic analysis, fault detection and electric energy quality monitoring of a power system.

An oil-immersed insulating combined transformer for an ultrahigh-voltage electric power system, wherein a current transformer secondary winding (7) in an oil conservator (2) of the combined transformer is arranged in an aluminum current transformer housing (8); ring insulation (9) is provided outside the aluminum current transformer housing (8); an insulating tube (11) and lead insulation (12) are provided inside a porcelain bushing (3), and the lead insulation (12) and the ring insulation (9) are integrally arranged; the insulating tube (11) supports the aluminum current transformer housing (8) and is arranged in the lead insulation (12); a voltage transformer core assembly (19) comprises a voltage transformer core column (13), which has a lead through hole (20) in the middle and is arranged in the insulating tube (11); a secondary lead of the current transformer secondary winding (7) passes through the lead through hole (20); and a voltage transformer secondary winding (15) is wound on the voltage transformer core column (13) and is arranged between the voltage transformer core column (13) and the insulating tube (11). The transformer can be safely applied to an ultrahigh-voltage electric power system.

Disclosed embodiments may include High Conversion Ratio Hybrid Switched Capacitor Power Converter, including components for, systems including, and methods for the same. Disclosed embodiments may provide a power conversion circuit and architecture that can achieve high efficiency and high voltage conversion ratio by mixing the operation of a switched capacitor charge distributor and a multiphase DC-DC voltage regulator. The circuits may include a magnetic structure and package that can achieve high performance when providing a high voltage conversion ratio while also offering low output current ripple and a fast dynamic response. The converter can be used, for example, to supply electricity to low voltage high current microprocessors in data centers.

The invention relates to a method for determining the rotor current of a separately excited synchronous machine (FSM), comprising a stator and a rotor with an excitation winding. Initially, an excitation supply voltage is connected via a controlled bridge circuit to terminals A and B of an inductive transformer. On the secondary side, this transformer is connected to the excitation winding of the FSM via a rectifier. The controlled bridge circuit can be regulated via switching parameters using a control unit. Subsequently, the primary current of the excitation winding of the FSM is sampled at terminals A and B. Then, an evaluation time for the sampled primary current is determined, and the primary current is evaluated at that time. The evaluated primary current is then converted to the rotor current. Finally, the rotor current at the evaluation time is output.

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.

The invention relates to the technical field of current detection, and particularly discloses a magnetic core assembly, a miniature current transformer and a processing method thereof.The magnetic core assembly comprises a first magnetic core and a second magnetic core, the first magnetic core comprises a first base, a first mounting column and a first connecting plate, and the first mounting column and the first connecting plate are arranged on the first base; the first connecting plate is arranged on one side of the first mounting column. The second magnetic core comprises a second base, a second mounting column and a second connecting plate, the second mounting column and the second connecting plate are arranged on the second base, the second connecting plate is arranged on one side of the second mounting column, the second connecting plate is correspondingly connected with the first connecting plate, and the second mounting column is correspondingly connected with the first mounting column; the conductive part can be wound on the first mounting column and the second mounting column, the first connecting plate and the second connecting plate perform protection on one side of the conductive part, efficient heat dissipation can be performed on the circumferential surface of the guide part, and the overall size of the magnetic core assembly and the miniature current transformer can be reduced.

A hybrid battery charger is disclosed that includes a linear charger circuit for providing vehicle starting current and battery charging and a high frequency battery charging circuit that provides battery charging current. The linear charger circuit and the high frequency battery charging circuits are selectively enabled to provide vehicle starting current, maximum charging current and optimum efficiency.

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.”

The invention discloses a mutual inductor iron core, a mutual inductor coil and a current transformer, and belongs to the technical field of current transformers, the mutual inductor iron core comprises a protective shell, a core body and a limiting assembly, the protective shell is provided with an annular first containing cavity, and the core body is located in the first containing cavity; the inner top wall and the inner bottom wall of the first containing cavity are each provided with a plurality of first triangular teeth which are evenly distributed in the circumferential direction in a protruding mode, the limiting assembly comprises an elastic structure and two annular limiting plates, the two limiting plates are located on the two axial sides of the core body correspondingly, and the surfaces of the limiting plates are each provided with a plurality of second triangular teeth which are evenly distributed in the circumferential direction in a protruding mode; the inclined face of the second triangular tooth is attached to the inclined face of the first triangular tooth, the elastic force of the elastic structure is used for forcing the two limiting plates to rotate relative to the protective shell in the circumferential direction, and the inclined face of the second triangular tooth is partially attached to the inclined face of the first triangular tooth, so that an axial gap is formed between the tooth crest of the second triangular tooth and the tooth root of the first triangular tooth. The structural stability and the position stability of the core body can be improved.

A method and system are disclosed for providing electrical power from a utility electric grid to a fracturing operation, and an electrically powered fracturing system. A mobile substation includes at least two transformer units that are operatively coupled to the utility electric grid in a parallel orientation, wherein the transformer units are capable of receiving power from the utility electric grid and stepping down the power for delivery to a switchgear. An electric motor is operatively coupled to a hydraulic fracturing pump and operatively controlled by a variable frequency drive. At least one open air relay cable is operatively coupled between the switchgear and the electric motor and capable of delivering power to the electric motor.

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.

In the current transformer, a plurality of PCBs (printed circuit boards) are distributed on a magnetic iron core framework, welding spots, integrating resistors and damping resistors are welded on the PCBs, the welding spots are used for connecting winding wires, the winding wires are uniformly wound among the welding spots on the magnetic iron core framework according to the number of turns at intervals to form windings, and the winding wires are wound on the magnetic iron core framework. The number of spaced turns is associated with the damping resistance. According to the patch damping resistor type broadband self-integration Rogowski coil current transformer, the resonance phenomenon of the coil can be suppressed, and the bandwidth of the self-integration Rogowski coil current transformer is increased to a large extent.

An inductive connection system includes a baseplate that provides an attachment interface on a support surface. The baseplate is configured to engage with at least one accessory via the attachment interface to secure the accessory to the support surface. The attachment interface provides a plurality of different mounting positions for the at least one accessory. At least one puck is selectively coupled to the attachment interface to provide a desired one of the plurality of different mounting positions. One of the at least one puck and the at least one accessory includes an inductive transmitter and the other of the at least one puck and the at least one accessory includes an inductive receiver such that the at least one puck in the baseplate and the at least one accessory electrically connect to each other through a wireless electrical power link between the inductive transmitter and the inductive receiver when the at least one accessory is mounted in the desired one of the plurality of different mounting positions.

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.

Systems and methods for a wireless power transfer system are provided. A resonator arrangement includes a housing, a magnetic core positioned within the housing and defining an annular groove, a coil element positioned within the annular groove and configured to generate a first magnetic field, and a counter-coil element positioned proximate the coil element, the counter-coil element configured to generate a second magnetic field that is out of phase with the first magnetic field to facilitate reducing far-field electromagnetic emissions.

The invention discloses a residual magnetism elimination circuit and method for a current transformer, and the method employs a fluxgate principle, applies sine excitation voltage to a secondary winding of the current transformer, extracts a fluxgate signal through a response current, and achieves the detection of the residual magnetism of an iron core of the current transformer. And according to the detected residual magnetism flux linkage information, accurately calculating a voltage parameter required by demagnetization, and generating a degaussing voltage with a specific waveform. And finally, applying the degaussing voltage obtained by calculation to the secondary side of the current transformer, controlling the whole degaussing time to continue at the moment at which the fundamental wave angular frequency can be rotated to + / -90 degrees, and accurately eliminating residual magnetism by utilizing sine waves of a quarter period. According to the method, rapid demagnetization of the iron core of the current transformer can be realized, the reliability and safety of a power system are improved, and demagnetization can be carried out in the running process of the current transformer without offline operation or change of an original transformer structure. The residual magnetism of the iron core is not changed in the detection process, and the normal operation of the current transformer is ensured.

The present invention provides a method of inhibiting the growth of proliferating cells or viruses in living tissue, the method comprising: applying mid-level frequency AC current electromagnetic signals to the living tissue with a transducer comprising a magnetically conductive material passing through a conduction ring energized by an electrical signal to create the mid-level frequency AC current electromagnetic signals within the living tissue; wherein the mid-level frequency AC current electromagnetic signals have a frequency in the range of about 50 kHz to about 300 kHz and are produced with an AC voltage generator; and circulating fluid in the living tissue provide a secondary coil for the transmission of the mid-level frequency AC current electromagnetic signals.

Electromagnetic shields, vehicles, wireless charging systems, and related methods are disclosed. An electromagnetic shield includes a shield member including a coil side to face one or more inductive coils. The electromagnetic shield also includes one or more perimeter shield members configured in a loop proximate to a perimeter of the coil side of the shield member. The shield member and the one or more perimeter shield members are configured to shield electromagnetic radiation emitted by the one or more inductive coils.

According to various embodiments, there may be provided an electronic device comprising a coil, an inverter configured to provide power to the coil, a power providing circuit, a communication circuit, and a control circuit, wherein the control circuit is configured to control the power providing circuit to apply a first voltage to an input terminal of the inverter, the inverter outputting a first magnitude of power based on the application of the first voltage, control the power providing circuit to apply a second voltage lower than the first voltage to the input terminal of the inverter, based on the application of the first voltage being maintained for a specific time, identify, through the communication circuit, a first control error packet from the wireless power receiving device, while applying the second voltage, and identify a first value included in the first control error packet.