47 results about "Shunt capacitors" patented technology

An example power splitter and associated methods are provided herein. In some embodiments, the power splitter may include a first port. In some embodiments, the power splitter may include a plurality of second ports. In some embodiments, the power splitter may include one or more low pass elements. In this regard, the one or more low pass elements may include at least one series inductor and at least one shunt capacitor. In some embodiments, the power splitter may include one or more high pass elements. In this regard, the one or more high pass elements may include at least one series capacitor and at least one shunt inductor. In some embodiments, each of the one or more high pass elements and each of the one or more low pass elements is electrically connected to the first port and the plurality of second ports.

The invention relates to a notch filter for wireless circuitry. In particular, the wireless circuitry may include one or more notch filters. The notch filter circuit may include a series inductor having a first terminal coupled to an input and having a second terminal coupled to an output; a first series capacitor having a first terminal coupled to the input and having a second terminal coupled to a node; a second series capacitor having a first terminal coupled to the output terminal and having a second terminal coupled to the node; and a shunt resistor having a first terminal coupled to the node and having a second terminal coupled to a ground line. The notch filter may also include a shunt capacitor coupled in series with the shunt resistor located between the node and the ground line. The shunt resistor may be an adjustable resistor.

Apparatus and methods for load mismatch compensation of power amplifiers are disclosed. In certain embodiments, a power amplifier system includes a power amplifier having an output coupled to an antenna through a mismatch compensation circuit. The mismatch compensation circuit includes a bank of switchable shunt capacitors and a bank of switchable series capacitors, with the bank of switchable series capacitors connected between the output of the power amplifier and the bank of switchable shunt capacitors.

The invention discloses a self-healing parallel capacitor aging test device and method for an AC power system. The method comprises the following steps: S1, preparation before test; s2, carrying out a first-stage aging test; s3, carrying out a charge-discharge cycle test; s4, performing a second-stage aging test; and S5, detecting after the test. According to the self-healing parallel capacitor aging test device and method for the alternating-current power system, automatic control over the whole test process is achieved, it is guaranteed that test conditions meet the national standard requirement, the influence and closing impact on a power grid in the test process are eliminated, the accuracy and reliability of a test result are improved, and the test efficiency is improved. A standardized method is provided for performance evaluation of the capacitor, and the problems that an existing test device is low in integration and automation degree, poor in test precision, large in power grid influence and insufficient in safety protection are solved.

A battery power supply (BPS) circuit to power an intermittently powered load, optimized to maximize battery capacity utilization and extend battery life, while offering low temperature performance. The BPS includes a voltage converter connected to a battery for generating a voltage greater or less than the battery voltage, a current limiter configured to limit current in a current limiting mode and to provide a shunt in a noncurrent limiting mode, a capacitor tank for providing an output voltage to the load and first charged to a voltage up to 95 or 100% (depending upon the operation of the BPS) of a desired output voltage, and second charged to the desired output voltage when the current limiter is shunted.

The utility model relates to the field of low-voltage parallel capacitors, and discloses a high-safety low-voltage parallel capacitor which comprises a cylindrical shell, a core rod coaxial with the shell is arranged in the shell, a capacitor assembly is arranged on the periphery of the core rod, and a wire holder electrically connected with the capacitor assembly is arranged above the capacitor assembly. An explosion-proof belt which is recessed towards the inside of the shell is fixed on the peripheral side wall of the shell, when the capacitor assembly is heated to drive the shell to expand, the explosion-proof belt is straightened from a folded state, the connection between the capacitor assembly and the wiring section terminal is broken by expansion of the shell, and the capacitor assembly does not continue to heat any more. The risk that the shell continues to expand and explode is avoided, and the use safety performance of the low-voltage parallel capacitor is improved.

The invention discloses automobile sound equipment and a noise reduction method thereof, and belongs to the technical field of automobile noise reduction. The sound equipment comprises a loudspeaker, and a noise reduction control circuit, an audio playing circuit and a control chip which are electrically connected with the loudspeaker, the loudspeaker comprises a driving unit, a positive electrode interface and a negative electrode interface; the noise reduction control circuit comprises a shunt resistor, a shunt capacitor and a shunt inductor which are sequentially connected in series; wherein the shunt resistor is connected with the positive electrode interface through the first execution chip, and the shunt inductor is connected with the negative electrode interface through the second execution chip; the output end of the audio playing circuit is connected with the positive electrode interface through the first execution chip, and the backflow end of the audio playing circuit is connected with the negative electrode interface through the second execution chip. The control chip controls the first execution chip and the second execution chip to be switched synchronously, so that one of the audio playing circuit and the noise reduction control circuit is switched on. According to the invention, the loudspeaker is used for active noise reduction in the non-audio playing state through circuit switching, and no extra noise reduction equipment needs to be installed.

Apparatus and methods for power amplifier systems with balun and shunt capacitor are disclosed. In certain embodiments, a front-end system includes a shunt capacitor, a balun having an input side and an output side, and power amplifier stages that operate in parallel with one another to amplify a radio frequency input signal. The power amplifier stages include a first power amplifier stage having a first output coupled to the shunt capacitor and to a first input terminal on the input side of the balun, and a second power amplifier stage having a second output coupled to a second input terminal on the input side of the balun.

This application discloses a charging pile and its control method, relating to the field of DC charging technology. The charging pile includes a three-phase parallel resonant converter, a controller, and a relay control circuit. The three-phase parallel resonant converter is connected to both the controller and the relay control circuit. The three-phase parallel resonant converter includes three independent and structurally identical conversion units. Each conversion unit includes an input rectifier bridge, a resonant circuit, an isolation transformer, and a rectifier circuit connected in sequence. The resonant circuit includes a choke coil, a switching transistor, a shunt capacitor, a resonant capacitor, and a resonant coil. The rectifier circuit includes a rectifier capacitor, a diode, a filter capacitor, a first filter coil, and a second filter coil. The controller is used for: soft-start control of the output voltage and output current during the startup phase, and control of the series and parallel connection state of the relay control circuit; and for performing input-side and output-side regulation and drive wave generation control during the operation phase. This application has the advantages of high power density, small size, and simple control.

The application discloses a commutation margin hybrid compensation system, method and device and related equipment, and the system comprises at least one 12-pulse converter bridge, at least two converter transformers, a smoothing reactor, a network-side AC bus, at least two commutation margin hybrid compensation devices, the commutation margin hybrid compensation device comprising a valve-side AC bus, a shunt capacitor bank and at least one current source converter; the shunt capacitor bank and the current source converter are both connected in parallel on the valve-side AC bus; the shunt capacitor bank is configured to provide reactive compensation to the 12-pulse converter bridge and filter out high-order harmonics; the current source converter is configured to increase the actual extinction angle of the 12-pulse converter bridge by outputting a preset harmonic current. The scheme effectively increases the commutation margin, reduces the risk of commutation failure, accurately compensates for reactive power and harmonics nearby, saves the traditional AC filter, reduces the occupied area, and reduces the loss and cost.

This invention discloses a method for equalizing the branch impedance of a parallel capacitor bank, comprising: determining parameters such as the connection position of each capacitor branch on the positive and negative busbars, and the input and output positions of the positive and negative busbars; and balancing the impedance of the first capacitor branch with the second capacitor branch. i The total equivalent impedance of each capacitor branch is decomposed into busbar path impedance, capacitor body impedance, and connector distributed impedance. Based on the connection location and busbar inlet / outlet positions, the corresponding busbar path impedance is calculated or extracted. Based on the busbar path impedance, capacitor body impedance, and adjustable range of connectors for multiple capacitor branches, the total impedance of the target branch is determined. The impedance of the first capacitor branch is then calculated inversely based on the total impedance of the target branch. i The invention addresses the impedance compensation required for each capacitor branch and determines the corresponding connector configuration scheme based on the target impedance compensation. This invention brings the total equivalent impedance of multiple capacitor branches closer to uniformity, achieving branch impedance balancing in parallel capacitor banks.

Wireless circuitry can include one or more notch filters. A notch filter circuit can include a series inductor having a first terminal coupled to an input and having a second terminal coupled to an output, a first series capacitor having a first terminal coupled to the input and having a second terminal coupled to a node, a second series capacitor having a first terminal coupled to the output and having a second terminal coupled to the node, and a shunt resistor having a first terminal coupled to the node and having a second terminal coupled to a ground line. The notch filter can further include a shunt capacitor coupled in series with the shunt resistor between the node and the ground line. The shunt resistor can be a tunable resistor.

This disclosure relates to devices, wireless communication apparatuses, methods, and circuit systems for T-type switches with gate shunts. One aspect is a device including a first differential switch having a control input. The device also includes a second differential switch coupled to the first differential switch, the second differential switch being the control input. A shunt capacitor is coupled between a first output and a second output of the first differential switch and a first input and a second input of the second differential switch. The first shunt switch, having control inputs, inputs, and outputs, has inputs and outputs coupled to the control input of the first differential switch. The second shunt switch, having control inputs, inputs, and outputs, has inputs and outputs coupled to the control input of the second differential switch.

The utility model belongs to the technical field of electrical equipment, and particularly relates to an SH-E series elliptical self-healing low-voltage parallel capacitor device, which comprises a frosted tinplate shell group, and a power screw is fixed on the upper side of the frosted tinplate shell group. The device is composed of the frosted tinplate shell group, the power supply screw rod, the grounding terminal, the resistor, the explosion-proof security sheet, the braided copper wire, the metallized polypropylene film and the flame-retardant soft resin adhesive, so that disasters can be effectively prevented and isolated, the dry design is pollution-free, and the use safety is ensured; the loss is very low, and the service life is long; a self-recovery function, an over-temperature protection function and a unique protection system are provided, the weight is light, the structure is simple, the size is small, the operation is convenient, the voltage quality can be effectively improved, the power factor is improved, and the system power supply capability is improved; the improved capacitor device comprises an upper module and a lower module, can be quickly assembled and disassembled, and is extremely convenient to repair and maintain.

The invention discloses a power supply module application circuit adopting a power and control separation architecture, relates to the field of power supply equipment, and aims to solve the problem of a power supply mode of a high-integration and low-power-consumption phased-array antenna, low voltage and a large circuit. The system comprises a control module and a power module. One control module is at least connected with one power module and at most connected with 16 power modules which are connected in parallel; according to the control module, a VIN12V pin is connected with a first shunt capacitor circuit; the ADDRESS pin is connected with the first series circuit; the PROG pin is connected with the second series circuit; the vBOOT pin is connected with the third series circuit; the FAULT pin is used for fault alarm; the SENSE pin is used for voltage sampling; the AUX5V pin and the TEMP pin are used for connecting a power module; the EN pin is used for switching on and off, the VREF is used for connecting reference voltage, the PWM6 pin and the PWM7 pin are used for phase driving, and the CS6 pin and the CS7 pin are used for current sampling. According to the invention, a low-voltage and large-current power supply mode is realized.

A quantum circuit and related manufacturing method are disclosed. The quantum circuit includes a vertical Josephson junction (1001) formed by a bottom electrode (810) in the first superconducting material layer, a tunnel barrier (830), and a top electrode (820) in the second superconducting material layer. A contact portion (811) and a coupling portion (812) of the bottom electrode are respectively located inside and outside the Josephson junction. The transport sub-qubit of the quantum circuit comprises a Josephson junction (101) and a shunt capacitor formed from contacts of a top electrode and a bottom electrode as shunt capacitor plates. The readout circuit is capacitively coupled to the bottom electrode through the coupling and includes a coupling head (861). The coupling portion is fitted into the recess of the coupling head. The top electrode is configured as a floating electrode and is not resistance-coupled to the first superconducting material layer.

The utility model provides a wind generating set high voltage ride through test device comprising a test box body, two ends of the test box body are respectively connected with a connecting lead, and the tail end of the connecting lead is provided with a fixing assembly; a test circuit board and a super capacitor module are arranged in the test box body, a display screen is arranged at the top of the test box body, a protective shell is arranged on the outer side of the display screen, and the test circuit board can be connected between a tested wind turbine generator and a power grid through connecting wires at the two ends. The test circuit board is provided with a current limiting reactor group, a parallel capacitor group, a thyristor and a plurality of groups of circuit breakers, and the super capacitor module is connected with a direct current bus of the tested wind turbine generator. The test equipment can solve the problems of poor connection stability, inaccurate voltage simulation and low test automation degree in the prior art.

The utility model relates to the technical field of reactive compensation, in particular to a combined switch device and a transformer substation reactive compensation system, the combined switch device comprises a capacitance reactance switch mechanism, the capacitance reactance switch mechanism comprises a reactor capacitance-adjusting switch unit, and a power supply loop comprises a first inductance coil, a second inductance coil and a third inductance coil. When the reactor capacitance-adjusting switch unit is in the first connection position, the first inductance coil and the second inductance coil are connected in parallel and then are connected in series with the third inductance coil to be connected into a power supply loop. And when the reactor capacitance-adjusting switch unit is located at the second connection position, the first inductance coil and the second inductance coil are connected in series and then connected with the third inductance coil in series to be connected into the power supply loop. According to the combined switch device and the transformer substation reactive power compensation system provided by the invention, the capacity of the reactor of the transformer substation reactive power compensation device is adjustable, the switching and discharging of the parallel capacitor are realized, the adaptability of the reactor of the transformer substation reactive power compensation device is improved, the setting number of the reactor is reduced, and the cost is reduced.

The present invention provides a plasma processing apparatus. The apparatus includes a chamber having a processing space in which plasma is generated, and a plasma generation unit for exciting a gas within the processing space into a plasma state, wherein the plasma generation unit includes a first power supply for providing power for generating the plasma, a coil portion connected to the first power supply, a first shunt capacitor connected between a first node of the coil portion and a ground supply, and a second shunt capacitor connected between a second node of the coil portion different from the first node and the ground supply.

Embodiments described herein relate to an apparatus that includes a first transistor with a first terminal, a first gate, and a second terminal. In an embodiment, the apparatus further includes a second transistor with a third terminal, a second gate, and a fourth terminal. In an embodiment, the second terminal of the first transistor is electrically coupled to the fourth terminal of the second transistor by an electrically conductive path, and the third terminal is grounded. In an embodiment, a power supply is electrically coupled to the first terminal of the first transistor. In an embodiment, the apparatus further comprises a capacitor that is electrically coupled to the electrically conductive path. In an embodiment, a power source is electrically coupled to the electrically conductive path.

The application relates to the technical field of power equipment, and discloses an insulating sleeve for a high-voltage parallel capacitor, which comprises a sleeve main body, a first mounting assembly and a second mounting assembly, the sleeve main body comprises a conductor and an insulator, the first mounting assembly comprises a first mounting seat, the second mounting assembly comprises a second mounting seat, a plurality of movable guide grooves are arranged on the first mounting seat, a pushing block is slidably arranged in the movable guide grooves, and a protective guide rod is arranged at the region corresponding to each movable guide groove on the second mounting seat. The conical guide space formed by the plurality of protective guide rods can effectively keep the stability of the sleeve main body during the installation of the sleeve main body, the inner extension section is not prone to knocking against the used equipment, the safety during the installation of the sleeve main body can be effectively improved, the operation personnel need not to excessively interfere and adjust during the process, and the installation efficiency of the sleeve main body and the used equipment is effectively improved.

The utility model discloses a device used for measuring converter transformer valve side AC voltage, comprising a main body unit composed of a resistance-capacitance voltage divider and used for dividing AC-DC superposed voltage; and the secondary voltage dividing unit is connected in parallel with a capacitive voltage divider on an output terminal of the resistance-capacitance voltage divider and is used for isolating direct current voltage from the direct current component output by the main body unit. The problem of converter transformer valve side AC voltage measurement is solved.

The invention discloses a high-linearity current multiplexing two-stage low noise amplifier, belongs to the field of radio frequency integrated circuits, and aims to solve the problem of gain compression distortion caused by grid voltage instability of a second-stage amplifier tube under high-voltage and large-current working conditions. An auxiliary transistor M3 is additionally arranged beside a main amplification transistor M2, and a cross coupling connection structure is adopted, so that a dynamic voltage balance mechanism is constructed. When a large signal is input to cause grid voltage fluctuation, the structure automatically regulates and controls the conduction state of the M3 based on a voltage difference threshold value, and a passive real-time voltage stabilizing loop is formed. The inter-stage resonance network suppresses the parasitic effect through a shunt capacitor dominant capacitance design, a source negative feedback inductor is accurately matched with input impedance, and the integrity of broadband signals is cooperatively guaranteed. The cross coupling topology breaks through the contradiction between high gain and high linearity on the premise that power consumption is not increased, and a low-noise and high-stability signal amplification solution is provided for satellite navigation and a base station radio frequency system.

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 current sensing system for a magnetic resonance imaging (MRI) scanner operating at 1H and 31P resonant frequencies includes a dual-tuned RF coil with a network of up to two parallel quarter-wavelength transmission lines, each integrated with a PIN diode-coupled shunt capacitor. A multiple half-wavelength transmission line is employed with a corresponding pair of shunt capacitors and PIN diodes. A quarter-wavelength transmission line, coupled with a power amplifier through a matching network of shunt capacitors and PIN diodes, is also included. The configuration parameters are designed to tune the system to the fundamental frequency and its first odd multiple, correlating with the 1H resonant frequency, and to the 31P resonant frequency. The system accurately senses coil currents by detecting voltage variations in the matching network, thereby facilitating precise current measurements at the tuned resonant frequencies without the need for external sensors.

Embodiments described herein relate to an apparatus that includes a first trace, a capacitor electrically coupled to the first trace, and a balanced transformer electrically coupled to the capacitor. In an embodiment, a first transistor and a first diode are electrically coupled to a first inductor of the balanced transformer, and a second transistor and a second diode are electrically coupled to a second inductor of the balanced transformer.

Embodiments described herein relate to an apparatus that includes an electrically conductive path and switched shunt capacitor electrically coupled to the electrically conductive path. In an embodiment, the switched shunt capacitor is configured to be switched on and off by a half-bridge circuit that includes a first transistor and a second transistor, and wherein an RF choke is on an electrical path between the first transistor and the second transistor.

The invention discloses a reactive compensation optimal configuration method and system considering steady-state voltage regulation and transient support, and belongs to the technical field of power grid optimal configuration. The method comprises the following steps: screening out a partition with high risk of steady-state overvoltage as a target area according to the live data of a power grid; carrying out fault verification on the screened target region, calculating a transient voltage severity index, and screening a transient voltage stability high-risk region in the target region as a voltage weak region based on the transient voltage severity index; according to the characteristics of the reactive power compensation device, a configuration and checking scheme of the dynamic reactive power compensation device is established, after optimization configuration is carried out on a power grid through the configuration and checking scheme, the inductive compensation degree is improved through calculation, the optimal configuration scheme of the shunt capacitor reactor is determined, and the optimal configuration scheme of the shunt capacitor reactor is calculated. And carrying out optimal configuration on the power grid again. According to the invention, the steady-state and transient-state voltage stability level of the power grid is effectively improved.

The invention discloses a multi-device multi-time-scale operation optimization method for an AC / DC hybrid transformer area, and relates to the field of flexible interconnection transformer area operation optimization, and the method comprises the steps: constructing a day-ahead optimization model with network loss and photovoltaic reduction as targets according to the photovoltaic power uncertainty; based on the day-ahead optimization model, the minimum voltage deviation is increased, and an intra-day optimization model is constructed; and solving the optimization model by using second-order cone relaxation and linearization, and outputting the optimal power output of the VSC and the energy storage equipment. According to the method, flexible interconnection of the alternating current and direct current transformer areas is achieved through the VSC, the characteristics of different regulation and control devices are considered, the method is divided into two stages, in the first stage, the minimum power loss of the alternating current and direct current hybrid transformer area and the minimum photovoltaic active power reduction serve as target functions, and the 24h optimal action sequence of the OLTC and the parallel capacitor bank is solved; in the second stage, photovoltaic and load short-time power characteristics are considered, the optimization result of the first stage is combined, and the short-time power output of the VSC and the energy storage device is optimized by taking photovoltaic absorption, network loss reduction and node voltage deviation as targets.

The invention discloses a power distribution network reactive power optimization treatment method based on an improved genetic algorithm, and the method mainly comprises the following steps: carrying out the load flow calculation of a plurality of candidate access nodes in a power distribution network, and constructing a multi-target comprehensive evaluation index based on the voltage distribution generated after the access of each node and the total active power network loss, and finally, determining the optimal access position of the distributed photovoltaic according to the index. Calculating a node equivalent reactive power margin, and selecting a node with a minimum reactive power margin value as an installation position of the parallel capacitor bank; the performance of the genetic algorithm is improved by improving the fitness function and dynamically adjusting the crossover and mutation probability according to the differentiated fitness values; and finally, establishing a power distribution network reactive power optimization model containing power flow balance, equipment output and voltage safety constraints, and solving by adopting an improved genetic algorithm. The optimal reactive power compensation scheme is output after simulation of the improved IEEE-33 node system, and the result shows that reactive power optimization of the power distribution network based on the improved genetic algorithm has a good treatment effect.