17 results about "Nonlinear inductance" patented technology

The invention relates to a microwave signal amplifier comprising a chain of nonlinear inductive dipole elements each forming an asymmetric superconducting loop with Josephson junctions, said chain being arranged between an input of the chain for applying a signal to be amplified and an output of the chain at which an output signal is developed, the amplifier further comprising a controllable magnetic flux generation system for circulating a current in said loops, the amplifier further comprising a first microwave pump and means for coupling said input of the chain to the first pump, the first pump generating through the first coupling means a wave in the chain in the direction from the input to the output of frequency adjusted to transfer power at the frequency of the signal to be amplified.The device further comprises a second microwave pump and a second means for coupling said output of the chain to said second pump, the second pump generating through the second coupling means a wave in the chain in the direction from the output to the input, at a frequency different from that of the first pump and so as to attenuate in said direction from the output to the input the microwaves propagating at the frequency of the signal to be amplified. Figure for the abstract: Fig. 1.

This invention discloses a comprehensive testing system for an electric bicycle controller, belonging to the fields of power electronics and motor control technology. The system includes the following steps: performing an electrical self-test to verify the validity of the basic operating state; after passing the self-test, acquiring a preset automated test sequence to control and simulate various test conditions for the controller under test; while running the automated test sequence, constructing a virtual motor operating environment on the rotorless stator coils, and performing virtual reconstruction and dynamic compensation algorithms; wherein, the dynamic compensation algorithm includes the generation and injection of virtual back EMF, real-time compensation of nonlinear inductance, and electromechanical coupling dynamic reconstruction; this system integrates virtual back EMF injection technology in the test board, by calculating and compensating the instantaneous value of the back EMF corresponding to the simulated rotational speed in real time in the digital domain, embedding key speed and position information into the feedback loop of the controller under test.

Disclosed is a method of manufacturing a Josephson travelling wave parametric amplifier, JTWPA (400), which comprises providing, on a substrate (406), a bottom conductive layer (404, 405), a dielectric layer (408), and a top conductive layer (403), the top conductive layer at least partly forming nonlinear inductors (409), top capacitor plates of parallel plate capacitors and / or conductive strips interrupted by nonlinear inductors, wherein the top conductive layer (403) is formed using a single instance of an angled evaporation method. The nonlinear inductors (409) may comprise one or more Josephson junctions, and the bottom conductive layer (404, 405) may form a CPW transmission line structure (402).

The invention relates to a microwave signal amplifier comprising a chain of nonlinear inductive dipole elements, each forming a superconducting asymmetric loop with Josephson junctions, the chain being arranged between an input of the chain for applying a signal to be amplified and an output of the chain at which an output signal is generated, the amplifier further comprising a controllable magnetic flux generation system for circulating a current in the loops, the amplifier further comprising a first microwave pump and a means for coupling the input of the chain to the first pump, the first pump generating, through the first coupling means, a wave in the chain in the direction from the input towards the output, the frequency of which wave is adjusted in order to transfer power at the frequency of the signal to be amplified. The device further comprises a second microwave pump and a second means for coupling the output of the chain to the second pump, the second pump generating, through the second coupling means, a wave in the chain in the direction from the output towards the input, at a frequency that is different from that of the first pump, so as to attenuate, in said direction from the output towards the input, the microwaves propagating at the frequency of the signal to be amplified.

The invention provides a three-dimensional nonlinear magnetic material equivalent circuit model and a test method, and is applied to the technical field of power electronics. According to the model, a current source module applies bias current and excitation current to a nonlinear coupling packaging module; a plurality of node ports of the nonlinear coupling packaging module are connected with physical coupling nodes of a plurality of nonlinear coupling devices; the mapping sub-module maps the plurality of physical coupling nodes and the plurality of nonlinear coupling devices, constructs an analog nonlinear coupling circuit according to a connection coupling relation between the linear damping module and the plurality of nonlinear coupling devices, and responds to an applied bias current and an excitation current, so that the nonlinear coupling circuit is simulated. The analog nonlinear inductance unit is coupled to generate an analog induced voltage, and the analog induced voltage is applied to the linear damping module and other analog nonlinear devices through a plurality of node ports to reproduce a magnetic domain rotation coupling effect and an anisotropic hysteresis effect; the linear damping module responds to the analog induced voltage and reproduces a damping effect in combination with the analog nonlinear resistor unit.

The application provides a nonlinear inductor, a manufacturing method thereof and a nonlinear inductor array. The nonlinear inductor comprises two magnetic core assemblies, a conductor and a magnetic plastic sealing layer. The magnetic core assembly comprises a magnetic core, the magnetic core comprises a blade and a column arranged on the blade, two columns of the two magnetic core assemblies are oppositely arranged, and the two columns have non-uniform air gaps therebetween and / or the magnetic core assemblies are made of different materials. The conductor is arranged on the two columns, the two magnetic core assemblies and the conductor are located in the magnetic plastic sealing layer, an electrode part of the conductor is exposed outside the magnetic plastic sealing layer, the magnetic core assemblies and the magnetic plastic sealing layer are made of different materials, and thus the nonlinear inductor has a stepped saturation characteristic.

A quantum information element 10 comprising a first element 18 and a second element 20. The first element comprising a first superconducting non-linear inductor (e.g. Josephson junction) provided betw

A hybrid voltage regulator device can include a hybrid phase circuit and a capacitor. The hybrid phase circuit can include a heterogeneous power stage and a nonlinear inductor coupled between the heterogeneous power stage and the capacitor. The heterogeneous power stage can be configured to provide a signal to the nonlinear inductor. The hybrid phase circuit can be configured to selectively operate in a first mode, wherein an amplitude of a current of the signal is less than a first threshold amplitude and a first inductance of the nonlinear inductive component is greater than a first threshold inductance. The hybrid phase circuit also can be configured to selectively operate in a second mode, wherein the amplitude of the current of the signal is greater than a second threshold amplitude, and a second inductance of the nonlinear inductive component is less than a second threshold inductance.

There is provided a travelling-wave parametric amplifier comprising: a transmission line; a plurality of unit cells provided along the transmission line; and a resonator coupled to the plurality of unit cells, wherein each unit cell of the plurality of unit cells includes a non-linear inductance element and a shunt capacitor. There is also provided a quantum information processing system comprising: a quantum operation unit that outputs an output signal of qubits; and a travelling-wave parametric amplifier that amplifies the output signal output from the quantum operation unit, wherein the travelling-wave parametric amplifier comprises: a transmission line; a plurality of unit cells provided along the transmission line; and a resonator coupled to the plurality of unit cells, wherein each unit cell of the plurality of unit cells includes a non-linear inductance element and a shunt capacitor.

A quantum information element comprising: a first element and a second element; the first element comprising a first superconducting non-linear inductor provided between two superconducting islands; and the second element comprising a three-wave mixing element provided between two superconducting islands, wherein one of the superconducting islands is common to both the first and second elements.

Disclosed is a nonlinear inductor, a manufacturing method thereof, and a nonlinear inductor row. The nonlinear inductor includes two magnetic core assemblies, a conductor and a magnetic plastic encapsulation layer; the magnetic core assemblies include magnetic cores; each magnetic core includes a flange and a central column arranged on the flange; two central columns of the two magnetic core assemblies are opposite to each other; a non-uniform air gap exists between the two central columns and / or the magnetic core assemblies are made of different materials; the conductor is arranged on the two central columns; the two magnetic core assemblies and the conductor are located in the magnetic plastic encapsulation layer; electrode parts of the conductor are exposed outside the magnetic plastic encapsulation layer; and the magnetic core assemblies and the magnetic plastic encapsulation layer are made of different materials; thereby the nonlinear inductor has stepped saturation characteristics.

The present disclosure relates to a TWPA device (1) for a quantum computer having a two-band dispersion relation and being configured to implement 3-wave mixing. The TWPA device (1) comprises chained unit cells (ø), each one comprising a nonlinear inductance element (5) and a capacitor (6) connected to a ground (7) thereof. The unit cells (ø) further comprises one of a resonator circuit (8) and periodically modulated input parameters. The two-band dispersion relation is composed of a lower frequency band and an upper frequency band with a frequency-gap in-between. Further, the TWPA device (1) is configured to receive an amplification signal, receive a pump signal at said input (2). The pump signal having a frequency being in said upper frequency band and being at least ⅔ of a cut-off frequency of said TWPA device (1), or said pump signal having a frequency being in said lower frequency band, wherein a second harmonic thereof is within said frequency-gap.

The invention relates to a microwave signal amplifier comprising a chain of nonlinear inductive dipole elements, each forming a superconducting asymmetric loop with Josephson junctions, the chain being arranged between an input of the chain for applying a signal to be amplified and an output of the chain at which an output signal is generated, the amplifier further comprising a controllable magnetic flux generation system for circulating a current in the loops, the amplifier further comprising a first microwave pump and a means for coupling the input of the chain to the first pump, the first pump generating, through the first coupling means, a wave in the chain in the direction from the input towards the output, the frequency of which wave is adjusted in order to transfer power at the frequency of the signal to be amplified. The device further comprises a second microwave pump and a second means for coupling the output of the chain to the second pump, the second pump generating, through the second coupling means, a wave in the chain in the direction from the output towards the input, at a frequency that is different from that of the first pump, so as to attenuate, in said direction from the output towards the input, the microwaves propagating at the frequency of the signal to be amplified.

The present invention relates to a system and method for high voltage switching in a computed tomography system. The system includes an oscillator circuit having a nonlinear inductor and a capacitor. The inductor and capacitor are connected in series, and the capacitor is connected to a high voltage line of a high voltage power supply. The inductor has an inductance that decreases with increasing current through the inductor, so that the inductance of the inductor changes significantly during resonant operation of the oscillator circuit, thereby essentially providing a square voltage that is applied to the capacitor. The square voltage modulates the high voltage of a high voltage generator, thereby switching the high voltage level applied to the electrodes of the computed tomography system.

The utility model discloses a kind of Josephson parametric amplifier based on full impedance matching, it is related to superconducting quantum computing technical field.Josephson parametric amplifier includes substrate and the impedance transformer, resonator, superconducting quantum interference device and pump line sequentially arranged on substrate;Resonator and superconducting quantum interference device constitute resonant circuit, and resonator and superconducting quantum interference device are respectively used to provide the impedance and nonlinear inductance required for resonance;Impedance transformer, resonator and pump line are coplanar waveguide, and resonator and impedance transformer jointly constitute impedance network, provide the impedance required for signal amplification to realize high bandwidth high gain parametric amplifier.The utility model uses coplanar waveguide to realize the impedance network of full impedance matching, simplifies the manufacturing process of parametric amplifier, improves the consistency of preparation amplifier.Simultaneously, the coplanar waveguide based on superconducting material reduces the loss in signal amplification process, improves the reading efficiency of quantum signal.

The application discloses a kind of voltage transformer model determination method and device.Therein, the method includes: based on the measurement voltage effective value data and active power data, using first point-by-point recursion method to determine the nonlinear resistance data of voltage transformer in preset sampling period, and determine the first relationship curve between nonlinear resistance data and resistance current peak value data;Based on resistance current peak value data, current effective value data and magnetic flux data are measured, and the second point-by-point recursion method is used to determine the nonlinear inductance data of voltage transformer in preset sampling period, and the second relationship curve between nonlinear inductance data and inductance current peak value data is determined;Model simulation processing is carried out according to the first relationship curve and the second relationship curve, and the voltage transformer model is obtained.The application solves the technical problems of low model construction accuracy and poor simulation effect caused by the fact that the voltage transformer model in the related art cannot accurately reflect the actual voltage transformer characteristics.

There is provided a travelling-wave parametric amplifier including: a plurality of group cells each including a plurality of unit cells, wherein the plurality of unit cells include: a transmission line that extends along a predetermined direction; and non-linear inductance elements and shunt capacitors arranged along the transmission line, wherein a respective group cell of the plurality of group cells comprises a periodic structure in which the non-linear inductance elements and the shunt capacitors periodically change along the transmission line, and wherein the plurality of group cells comprise a modulation structure in which the non-linear inductance elements and the shunt capacitors modulate along the transmission line.