324 results about "Inductive coupling" patented technology

The invention relates to an intelligent power distribution harmonic monitoring and dynamic compensation system which comprises a monitoring unit, a correction unit and a compensation unit. The monitoring unit continuously collects high-frequency harmonic voltage and current data in a distribution line at a high sampling frequency, extracts transient harmonic components through wavelet packet transformation and empirical mode decomposition, and generates low-dimensional feature vectors based on sparse representation. And the correction unit decodes the low-dimensional feature vector, recovers harmonic time-frequency features, calculates a phase drift rate, predicts a harmonic propagation path and an accumulation node by combining real-time power distribution network topology construction and adopting a nonlinear dynamic prediction model, and generates a correction instruction when abnormality is detected. And the compensation unit adopts pulse sequence density modulation to dynamically adjust a compensation current phase according to the correction instruction, and meanwhile, an inductive coupling device is utilized to transfer harmonic energy to a low-risk node, so that harmonic voltage distortion of a target node is quickly recovered to a stable level in a fundamental wave period after early warning.

An RFID tag including an inlay that is thin and easy to manufacture. The above problem is solved by an RFID tag including an inlay in which an IC chip and an antenna are provided on a base material having a main surface, wherein the antenna includes a loop conductive portion having both end portions connected to the IC chip so as to form a loop shape through the IC chip, and a dipole antenna portion disposed to surround the loop conductive portion with an interval allowing inductive coupling, and the loop conductive portion and the dipole antenna portion are formed on the main surface to have same thickness based on the main surface, and the IC chip is disposed on both end portions of the loop conductive portion.

In various embodiments of the invention, a cooled nuclear magnetic resonance (NMR) probe can utilize a sliding band capacitor which can be moved relative to a parent coil inner conductance tapered skirt to adjust the frequency of the parent coil to allow the parent coil to detect the resonance of at least two nuclei without requiring leads between the parent coil and a lock coil. In this manner a cooled NMR probe can be provided without the disadvantages of prior art cooled NMR probes. In an embodiment of the invention, the sliding band capacitor comprises a diamagnetic insulator with a first volume magnetic susceptibility, at least one paramagnetic metal with a second volume magnetic susceptibility and at least one diamagnetic metal with a third volume magnetic susceptibility, where the sum of the first volume magnetic susceptibility, the second volume magnetic susceptibility and the third volume magnetic susceptibility is approximately zero.

The invention discloses a low-power-consumption radiation-resistant quadrature voltage-controlled oscillator based on an SOI (Silicon On Insulator) process, relates to the technical field of quadrature voltage-controlled oscillators, and is used for solving the technical problems that an existing quadrature voltage-controlled oscillator is low in radiation resistance in a harsh radiation environment and does not have the characteristic of low power consumption. The invention discloses a low-power-consumption anti-radiation quadrature voltage-controlled oscillator based on an SOI process. The low-power-consumption anti-radiation quadrature voltage-controlled oscillator comprises a first voltage-controlled oscillator, a second voltage-controlled oscillator, a first tail filter and a second tail filter, the first voltage-controlled oscillator and the second voltage-controlled oscillator respectively form an LC resonant cavity with a parasitic capacitor of an inductor and a varactor through the inductor; the first tail filter is connected with the first voltage-controlled oscillator, and the second tail filter is connected with the second voltage-controlled oscillator; two inductors of the first tail filter and the second tail filter are coupled; lC resonant cavities of the first voltage-controlled oscillator and the second voltage-controlled oscillator output oscillation waveforms, and negative impedance is formed through configured transistor pairs, so that the waveforms are output constantly.

A low-noise amplifier (LNA) includes a first transistor, a second transistor, and a load coupled to a drain of the first transistor and a drain of the second transistor. The LNA also includes a first reactive impedance matching network including a first inductor and a second inductor inductively coupled with the first inductor, wherein the first inductor is coupled to a source of the first transistor, and the second inductor is coupled to a gate of the first transistor. The LNA also includes a second reactive impedance matching network including a third inductor and a fourth inductor inductively coupled with the third inductor, wherein the third inductor is coupled to a source of the second transistor, and the fourth inductor is coupled to a gate of the second transistor. The LNA also includes a switching circuit configured to enable or disable each of the reactive impedance matching networks.

The invention discloses a non-intrusive sensor with an external excitation source and a voltage measurement method, and the non-intrusive sensor comprises an induction signal collection unit, an induction signal conditioning unit, and a main control unit. The main control unit is respectively connected with the induction signal conditioning unit and the cable power supply, the induction signal conditioning unit is connected with the induction signal acquisition unit, and the induction signal acquisition unit is in non-contact inductive coupling connection with a cable to be detected; the main control unit is used for injecting the specific excitation signal into an alternating current loop of a cable power supply to form a composite signal, analyzing the composite signal based on a preset excitation source amplitude parameter, and calculating the power supply voltage of the to-be-detected cable; the induction signal acquisition unit generates a corresponding induction signal by capturing electric field energy generated by a composite signal in the to-be-detected cable; the induction signal conditioning unit carries out standardization processing on the induction signal. According to the invention, the technical problems of low external excitation voltage measurement precision, low system integration and single excitation source generation mode in the prior art are solved.

The invention discloses a defect coupling low-noise amplifier. The low-noise amplifier solves the problem that the performance of a low-noise amplifier in the prior art is influenced by a grid source inductance coupling coefficient. Forward coupling of an input inductor and a grid inductor and reverse coupling of the input inductor and a source inductor are achieved through a unique defect coupling transformer matching network, meanwhile, reverse coupling of a grid inductor and the source inductor is achieved, and the coupling coefficient of the grid-source inductor is reduced through coupling counteracting inductance; by combining a differential common-source transconductance amplification stage, a four-order magnetic coupling resonance unit, a differential transconductance amplification stage with a neutralizing capacitor and an output transformer matching network, the characteristics of high gain bandwidth and low noise are realized; simulation and actual tests verify that the low-noise amplifier can effectively reduce the noise coefficient and broaden the input matching range, has good compatibility and wide application prospects based on a conventional integrated circuit production process, can be applied to a phased array system, and can also form a receiver system with other circuits.

The invention relates to a cross-inductor voltage regulator (TLVR) inductor module and a power electronic assembly including the TLVR inductor module. A cross-inductor voltage regulator (TLVR) inductor module includes: a magnetic core; a first winding embedded in the magnetic core; a second winding embedded in the magnetic core and inductively coupled to the first winding; a third winding embedded in the magnetic core; a fourth winding embedded in the magnetic core and inductively coupled to the third winding; and a first integrated metal connector connecting the second winding and the fourth winding in the series loop. A power electronic assembly including the TLVR inductor module is also described.

The invention relates to the technical field of micro display, and discloses a display panel and a preparation method thereof.The display panel comprises pixel units arranged in an array, each pixel unit comprises a driving circuit layer arranged on one side of a substrate, and each driving circuit layer comprises multiple metal wire layers and interlayer dielectric layers arranged between the adjacent metal wire layers; the display panel comprises an isolation structure arranged between any two adjacent pixel units, and the lower end of the isolation structure extends to be flush with the bottom face of any metal wire layer or any interlayer dielectric layer in the direction perpendicular to the substrate or extends into the substrate. The isolation structure comprises a bottom insulating layer and side wall insulating layers arranged on the side walls of any two adjacent driving circuit layers. The isolation grooves are formed between the pixels and are filled with materials such as gas, low-dielectric-constant media or metal, so that capacitive coupling, leakage current and inductive coupling between the pixels are reduced, and the problems of contrast reduction, color distortion, inaccurate gray scale and the like caused by crosstalk are solved.

Method for operating a device (100) for wirelessly transmitting energy towards an electrical load (200) by means of inductive coupling, wherein the device (100) comprises: - a rectifier (108) for generating a DC voltage (US) from a mains AC voltage (UN), - an inverter (102) supplied by the DC voltage (US) configured to generate a pulse-width modulated control signal (AS), and - a power coil (101) controlled by the pulse-width modulated control signal (AS), by means of which an alternating magnetic field can be generated for transmitting the energy during predetermined transmission cycles, - wherein the method comprises the following steps for predetermined operating conditions: - determining, for a plurality of time points during a respective transmission cycle,which energy has been transferred from the device (100) towards the electrical consumer (200) up to the corresponding time during the respective transmission cycle, - comparison of the transferred energy with a maximum value and - if the transferred energy is equal to or greater than the maximum value, switching off the pulse width modulated control signal (AS) for the remaining part of the transmission cycle.

The application relates to the communication technical field, and provides a filter and a coupling polarity adjusting method.The filter comprises a first component, a second component, a first resonator, a second resonator and a coupling piece, the first resonator and the second resonator are located in a first resonant cavity and a second resonant cavity formed between the first component and the second component; one end of the coupling piece is located in the first resonant cavity and connected to the first resonator or the first component to form a short-circuit end, and the other end of the coupling piece is suspended in the second resonant cavity and located on one side of the second resonator to form an open-circuit end; and the coupling piece is used for capacitive coupling or inductive coupling between the first resonator and the second resonator.The filter provided by the application can realize capacitive coupling or inductive coupling between the first resonator and the second resonator by setting the coupling piece with the same structure and only setting different lengths, and the structure can be effectively simplified.

The application provides a transient ground potential rise induced coupling determination method through cable shielding layer, and belongs to the technical field of cable shielding layer.The application establishes a distributed parameter partial element equivalent circuit model of a grounding network, solves transient ground potential distribution by using a finite difference time domain method, obtains equivalent transfer impedance frequency characteristics of a braided shielding layer by using a four-port S parameter vector network analysis method and a variational asymptotic homogenization multi-scale algorithm, solves core line common mode voltage and differential mode voltage by establishing a multi-conductor transmission line equation group, constructs an artificial intelligence prediction model based on a topology perception graph neural network, solves a large-scale sparse admittance matrix by using a multilevel fast multipole method to obtain full network induced voltage distribution, and establishes a quantitative relationship model between ground potential rise and core line induced voltage, so that the technical problems that cable core line induced voltage caused by transient ground potential rise is difficult to accurately predict and effectively suppress are solved.

This utility model discloses a circuit for preventing a 6kV vacuum contactor switch from erroneously closing automatically, relating to the field of safety protection technology for high-voltage electrical control equipment. It includes a main control circuit and a suppression circuit, both electrically connected to a control power supply and connected in parallel. The main control circuit includes an inductor L1 and a time relay KT1, both electrically connected to the control power supply and connected in parallel, and both connected in parallel with the suppression circuit. This utility model uses auxiliary contacts CH1 / CH3 to monitor the voltage status in real time, achieving millisecond-level rapid disconnection. Simultaneously, the time relay KT1 ensures complete release of electromagnetic energy, and capacitors C1 / C2 specifically absorb the energy coupled from the cable's distributed capacitance and inductance, thus constructing a triple protection system of electrical detection, timing control, and energy absorption.

The application provides a harmonic suppression circuit of an inductive coupling energy transmission system, which places an auxiliary receiving circuit with a resonance frequency of 3 times, 5 times, 7 times or 2n+1 (n=1, 2, 3…) times of a fundamental frequency on a secondary side, configures a corresponding voltage stabilizing circuit on a direct current voltage output side of the auxiliary receiving circuit, and realizes a self-power supply function of a power utilization device such as a control circuit on the secondary side, and a quality factor Q of the auxiliary receiving circuit is i The harmonic suppression method is simple, does not affect power transmission of a main circuit, and can improve the efficiency of the inductive coupling energy transmission system.

Systems and methods for coupling quantum modes using a linear inductive coupler are provided. The linear inductive coupler includes an inductor and two Josephson junctions having approximately equal Josephson energies, each coupled in parallel with the inductor. During operation, the linear inductive coupler is biased by a magnetic flux approximately equal to Φ0 / 2 such that a phase drop across each of the two Josephson junctions is approximately equal to π / 2. Driving the linear inductive coupler thereafter using at least one electromagnetic signal enables coupling between two quantum modes.

Systems, circuits, and methods provide for detection of open-circuit states in an external conductor using inductive coupling. An on-chip coil is used to generate a reference magnetic field. An in-package conductor loop is connected to the external conductor. When the external conductor is continuous, the reference magnetic field generates an induced current in the in-package conductor whereas no induced current is generated when the external conductor is broken. The presence of an induced current produces an induced magnetic field, tending to cancel the reference magnetic field. The cancellation or attenuation of the reference magnetic field can be detected by an included magnetic field sensor and a comparator. Examples can include use of a closed loop acting as a feedback loop. The feedback loop can adjust the strength of a feedback magnetic field directed at the magnetic field sensor and used to compensate for nonlinearities of the magnetic field sensor.

The invention discloses a differential derivative structure circuit based on three-coupling transformation and an amplifier, and relates to the technical field of amplification circuit design. The differential derivative structure circuit comprises a three-coupling inductance network and N output parts. Through a three-coupling transformation mode, power supply of a main amplifier tube and an auxiliary amplifier tube in a differential derivative structure formed by connecting MOS tubes in parallel is integrated into an inductance matching network, so that homologous coupling of the main amplifier tube and the auxiliary amplifier tube on a radio frequency signal path is realized, physical isolation and independent bias control are also realized on a direct current path, and the power supply efficiency is improved. Therefore, a resistor does not need to be used, excessive use of a capacitor is avoided, loss caused by self impedance of the capacitor and ground parasitic capacitance loss are reduced, gain is greatly improved, extra area occupation caused by the capacitor and the resistor is effectively inhibited, and thermal noise introduced by the resistor is eliminated by utilizing the characteristic of low impedance of inductive coupling. Therefore, post-stage noise is effectively suppressed, and the noise coefficient is reduced.

A superconducting switch system includes a plurality of switch network circuits, each switch network circuit having a respective Josephson junction (JJ) coupled to a respective transmission line. The superconducting switch system furthermore includes a bias line coupled to each of the respective JJs such that a mutual inductive coupling between the bias line and the respective JJ of at least two switch network circuits of the plurality of switch network circuits are different from one another. A bias line current to the bias line controls the passing or blocking of a received input signal to an output for each of the plurality of switch network circuits by controlling an impedance of the respective JJ of each of the plurality of switch network circuits, the impedance of the respective JJ being determined based on the bias line current and the mutual inductive coupling between the bias line and the respective JJ.

A module antenna for use with a battery cell in a battery pack is provided. The module antenna enabling wireless communication between an electronic device coupled to the battery cell and a bus antenna. The module antenna comprises: a transmission line operatively coupled to the electronic device at one end and to at least one antenna at its other end, the at least one antenna enabling electro-magnetic coupling with the bus antenna, the at least one antenna having a plurality of sections arranged in series forming an unbalanced electrical path and being coupled to a termination resistor at its distal end. The module antenna further comprises at least one capacitive element located between the transmission line and the termination resistor, the capacitive element and the at least one antenna having a resonant frequency matched to an operating frequency of a desired transmission signal.

System and method for detecting an arc in a system for inductive transmission of electrical power, wherein the system comprises an elongated primary conductor into which an alternating current source impresses an alternating current, wherein a secondary winding is inductively coupled to the primary conductor, wherein the alternating voltage signal is provided by the secondary winding, from which a unipolar voltage signal is generated, where the unipolar voltage signal is derived over time and monitored in terms of magnitude to ensure that a threshold value is exceeded.

The application belongs to the technical field of semiconductor packaging, and particularly relates to a sputtering system based on coil inductive coupling assistance. The sputtering system comprises a vacuum chamber, a substrate arranged in the vacuum chamber, four inclined circumferential plane magnetron targets arranged on the substrate in the vacuum chamber, and two cylindrical magnetron targets arranged at the central axis of the cavity of the vacuum chamber, and four induction coils are arranged in the cavity of the vacuum chamber to form an inductive coupling electric field with the cylindrical magnetron targets. The application improves the uniformity of the plane film thickness.

In a first communication apparatus, a transmission circuit including a transmitting coil performs wireless transmission to a second communication apparatus through inductive coupling between the transmitting coil of the first communication apparatus and a receiving coil of the second communication apparatus. A reception circuit including a receiving coil performs wireless reception from the second communication apparatus through inductive coupling between the receiving coil of the first communication apparatus and a transmitting coil of the second communication apparatus. A determination unit determines whether a collision occurred between wireless transmissions performed by a plurality of communication apparatuses, based on at least one of a frequency and a pulse width of a pulse sequence received via the reception circuit. In a case where the collision occurred, a control unit performs control to transmit a retransmission request to the second communication apparatus via the transmission circuit.

According to the circuit multi-physical-quantity acquisition device based on the multiple anti-interference design, the push-pull circuit is arranged between the slave control MCU and the ST polling switching array, and the driving capacity and the anti-interference capacity of switching control are enhanced. A feedback variable resistor R6 is connected in series between the output end and the inverted input end of an operational amplifier U1, and a sensor is connected to the inverted input end of the operational amplifier U1, so that a direct-current equivalent path crossing the sensor is formed, and the output of the sensor and the output voltage of the operational amplifier U1 are in proportional relation. And operational amplifier oscillation caused by long-line distributed capacitance and inductive coupling is suppressed through the phase-shifting network. And through the phase change smoothing circuit, the high-frequency noise in the output voltage of the anti-interference acquisition circuit is further suppressed. And through the second-order series RC low-pass filter, the suppression capability of the device on line harmonic waves and electromagnetic interference is enhanced. The effective value of the output voltage of the anti-interference acquisition circuit is set between Vcc and GND through the clamping protection device G1, and the reliability and the anti-interference capability of the whole circuit are improved.

A system for monitoring an annulus in a well includes an inductive coupler. The inductive coupler includes a body, a power coil disposed around a first portion of the body, and a telemetry coil disposed around a second portion of the body separate from the first portion. A hole extends within the body, and a sensor is disposed in the hole.

The invention discloses a multi-level current source inverter and a control method thereof, and relates to the field of electric energy conversion control, the multi-level current source inverter is composed of an MCSI module, a direct current side inductor, a coupling capacitor, a ripple filter and a control module, and the three-phase voltage and the load current of a power grid are measured; calculating a reference phase under a synchronous rotating coordinate system by using a three-phase digital phase-locked loop, and further decomposing the reference phase into a current mean value and an alternating current component; a current error is obtained by establishing an additional control loop, and a DC component is separated from the current error by using a PI controller; generating a reference current under the synchronous rotating coordinate system, converting the reference current back to the three-phase coordinate system, and generating an actual gate driving signal of the MCSI module; based on an actual gate pole driving signal, the actual gate pole driving signal serves as a reference of phase shift carrier SPWM, and zero-state selection and inductive current balance are optimized in cooperation with a logic state machine. The method is used for power quality management of the power distribution network, harmonic waves and reactive power can be suppressed, and switching loss is reduced.

An electric choke and a system and method for removing energy from the electric choke are provided. The system includes one or more magnetic cores, at least one inductive coupler, and a resistor. The one or more magnetic cores are configured to form a portion of the electric choke by generating magnetic energy. The at least one inductive coupler is operable to convert the magnetic energy into electrical energy. The resistor is electrically connected to the at least one inductive coupler and is operable to dissipate the electrical energy as heat.

The invention discloses an impedance matching network, an impedance matching control system and an impedance matching method. An impedance matching network for a plasma process is described. The impedance matching network includes an input port connectable to the radio frequency generator module. The impedance matching network includes an output port connectable to a load. The impedance matching network includes a transmission circuit, wherein the transmission circuit connects the output port to the input port. The transmission circuit includes a first transmission line and a second transmission line, where the first transmission line is electrically connected to the input port, and where the second transmission line is electrically connected to the output port. The impedance matching network includes a first impedance matching module, wherein the first impedance matching module is configured to connect at least one reactance to the transmission circuit. The impedance matching network comprises a coupling element through which the first transmission line and the second transmission line are coupled to each other, and wherein the coupling element provides an inductive coupling between the first transmission line and the second transmission line.

The disclosure concerns non-invasive measurement of a local AC magnetic field and / or a local temperature in an electrically conductive sample structure. The system includes a sensing probe of a solid-state lattice with one or more spin defects which are tunable by external magnetic and / or electric fields, an RF transmitting antenna configured to emit RF waves, and a microscope configured to determine and / or control the distance between a sensing surface of the sensing probe and a surface of the electrically conductive sample. The RF transmitting antenna is arranged at a distance from the surface of the conductive sample structure for contactless induction of electrical RF current flow in the electrically conductive sample structure. The RF transmitting antenna is further arranged at a distance from the spin defects such that near-field inductive coupling between the RF transmitting antenna and the spin defects are prevented or substantially prevented.

A circuit board and an electronic device. The circuit board comprises a signal vertical interconnect structure group and a signal wire group; two signal vertical interconnect structures of the signal vertical interconnect structure group are respectively and electrically connected to two signal wires of the signal wire group, so as to construct a first signal path and a second signal path on which signals can be transmitted in the same direction; a first conductor portion on the first signal path is arranged adjacent to a second conductor portion on the second transmission path, the first conductor portion and the second conductor portion having opposite signal transmission directions, and being constructed as a crosstalk suppression structure. In this way, reverse mutual inductance can be formed on the basis of the first conductor portion and the second conductor portion. Compared with mutual inductance that generates crosstalk due to co-directional transmission between the first signal path and the second signal path, on the signal paths, the first conductor portion and the second conductor portion forming the reverse mutual inductance are constructed as the crosstalk suppression structure, such that the relative capacitive coupling and the relative inductive coupling of a full link can be adjusted, thereby effectively reducing full-link crosstalk and improving signal quality.

The invention discloses a pre-current-limiting hybrid direct current circuit breaker based on an inductive coupling principle and a control method. The pre-current-limiting hybrid direct current circuit breaker comprises a main branch and an auxiliary branch which are connected in parallel, the auxiliary branch comprises a bridge type reversing branch composed of thyristors and diode valve groups Q1-Q4, a current transfer branch, a bypass branch, a current limiting part, a self-charging part and an energy consumption branch are arranged in the bridge type reversing branch, and energy release branches composed of common mechanical switches and resistors are arranged at the two ends of a capacitor C1 and the two ends of a capacitor C2 respectively. The energy release branch is used for discharging the corresponding capacitor after the circuit breaker acts; the bypass branch, the current limiting part and the self-charging part are connected in parallel and then are connected in series with the energy consumption branch to form a series unit; the MMC flexible DC power grid circuit is small in on-state loss, low in cost, high in reliability, capable of being flexibly adapted to different abnormal scenes of a DC system, and suitable for the fields of MMC flexible DC power grids and the like.