25 results about "Continuous current" patented technology

This application provides a self-injection-locked narrow-linewidth laser with a quasi-continuous locking region, comprising: a semiconductor laser source for generating an initial linewidth laser and outputting it via end-face coupling; a photonic integrated microcavity chip including a bus waveguide and a microring resonator coupled to it via an evanescent wave, for receiving the initial linewidth laser and providing feedback light to the semiconductor laser through Rayleigh backscattering of the microring resonator to excite a self-injection-locking effect; the microring resonator is a compact folded waveguide microcavity with an ultra-low free spectral range, the free spectral range of which is less than a preset threshold, so that when the driving current of the semiconductor laser is changed for wavelength tuning, the self-injection-locking regions of adjacent resonant modes in the cavity physically overlap or are closely spliced ​​in the current tuning parameter space, so that the semiconductor laser can continuously transition between adjacent modes without experiencing permanent unlocking during continuous current tuning, forming a quasi-continuous locking region.

The application discloses a current sampling circuit, comprising a sampling resistor, at least two parallel signal amplification units and an output selection circuit. Each signal amplification unit has different preset voltage gain and preset bias voltage, and the signal amplification unit with higher preset voltage gain has lower preset bias voltage, thereby forming multiple continuous current range intervals corresponding to each signal amplification unit within the range of the current to be measured. The output selection circuit automatically selects the output voltage of the signal amplification unit corresponding to the current range interval where the current to be measured is currently located as the sampling result according to the output voltage of each signal amplification unit. The signal amplification units with multiple levels of gain are cascaded, and the corresponding signal amplification unit is automatically selected for output, so that when the current to be measured is small, voltage conversion is performed through a high-gain channel to ensure conversion resolution, and when the current to be measured is large, the output is automatically switched to a low-gain channel to avoid output saturation, thereby significantly improving the current sampling accuracy and system reliability.

A multi-phase switched capacitor converter is disclosed for converting a first voltage into a second voltage, or vice versa. The converter includes two sub-converters connected in parallel between an input voltage and an output voltage. Each sub-converter comprises a flying capacitor and a plurality of switches. Power conversion is performed by periodically switching the electrical connection between the flying capacitor and the voltage sources, between a first switching phase and a second switching phase. The two sub-converters alternately switch between a first system state and a second system state in a periodic manner. During the transition between the first and second system states, an overlapping system state is inserted, wherein both sub-converters are simultaneously in the first switching phase, thereby ensuring continuous current flow and reducing voltage spikes.

Systems and methods for implementing a continuous current monitor based on a low-side pilot power device is generally described. The semiconductor device includes a first circuit to filter an output signal from a power stage to generate a filtered signal that is coherent with an inductor current through an inductor in the power stage, a second circuit to generate a calibration code, and a third circuit to monitor current from a pilot device integrated in a low-side device of the power stage. The first circuit can calibrate the filtered signal to generate a calibrated signal based on the calibration code and the current from the pilot device. The second circuit can adjust the calibration code based on the calibrated signal. A combination of samples corresponding to the calibrated signal and samples corresponding to the current from the pilot device can recreate the inductor current.

The present application relates to the technical field of solar cells, and discloses a back-contact cell, a photovoltaic cell structure, and a photovoltaic assembly, used for inhibiting current mismatch between different bus electrodes in a positive electrode, and between different bus electrodes in a negative electrode. The back-contact cell comprises: a cell body, and a positive electrode and a negative electrode that are formed on a backlight surface of the cell body. The positive electrode and the negative electrode each comprise a plurality of current collector electrodes, a plurality of bus electrodes, and at least one connecting electrode. At least one current collector electrode comprised in the positive electrode and at least one current collector electrode comprised in the negative electrode both are continuous current collector electrodes. Each bus electrode comprises a plurality of bus electrode sections that are distributed at intervals in a second direction, and an interval between two adjacent bus electrode sections in the same bus electrode is used for isolating each current collector electrode having polarity opposite to that of the bus electrode from the bus electrode. Each connecting electrode is connected to all the current collector electrodes having the same polarity as that of the connecting electrode, and is mutually insulated from the current collector electrodes having the polarity opposite to that of the connecting electrode.

The present application discloses a power conversion circuit and a power supply system. The power conversion circuit comprises: a transformer comprising a primary winding and a secondary winding; a primary interface configured to receive an excitation current, wherein the transformer is configured such that when the primary winding receives an excitation current, the secondary winding generates an initial induced current; a secondary interface configured to output an induced current; a control circuit connected to the primary winding and the primary interface, wherein the control circuit is configured to control, on the basis of a first control signal, the primary winding to receive the excitation current from the primary interface; and an output circuit connected to the secondary winding and the secondary interface, wherein the output circuit is configured to output an induced current to the secondary interface on the basis of the initial induced current, and the induced current is a continuous current.

This utility model relates to a high-power power supply with electromagnetic interference resistance. The structure includes: a lower cover plate; an upper cover plate bolted to the lower cover plate; battery cells and a battery pack installed inside the lower cover plate; a relay connected to the lower cover plate on one side of the battery pack; both the lower and upper cover plates are made of aluminum alloy; a clamp is installed on the battery pack; the upper cover plate is brought close to the lower cover plate and bolted together by installing the lower cover plate, upper cover plate, clamp, relay, and battery pack; the lower and upper cover plates are separate aluminum alloy metal shells, facilitating quick installation and fixation; the shell design combines lightweight and modularity; the U-shaped clamp facilitates fixing the battery pack to the inner wall of the lower cover plate; a 500A continuous current relay controls the positive output circuit of the battery pack; the relay is controlled by an external 28V 200mA power signal to achieve circuit conduction and disconnection.

The application provides a time domain storage and calculation integrated unit and array structure based on RRAM, and the time domain storage and calculation integrated unit structure based on RRAM comprises a front inverter, an RRAM device, a transmission gate switch, a rear inverter and a data switch tube. The front inverter is composed of a P-type MOS tube P1 and an N-type MOS tube N1, and is connected to an RRAM top electrode and an input port DI; the transmission gate switch is composed of a P-type MOS tube P2 and an N-type MOS tube N2, and is connected to an RRAM bottom electrode, a word line port WL / WLB and a source line port SL; the rear inverter is composed of a P-type MOS tube P3 and an N-type MOS tube N3, and is connected to an RRAM bottom electrode and an output port DO; and the data switch tube is an N-type MOS tube N4, and the source-drain electrode thereof is connected to both ends of the RRAM device. The structure has no continuous current path, can realize storage and calculation integrated operation without static current in the time domain, reduces the power consumption of the storage and calculation integrated array, improves the calculation energy efficiency, and is suitable for hardware acceleration in artificial intelligence and edge computing scenarios.

This invention relates to the field of metal plastic forming equipment, specifically disclosing an insulation device for a twelve-roll mill using pulsed current assisted rolling. The device includes an uncoiling chuck, an inlet-side insulated energized guide roller, an insulated roll system, an outlet-side insulated energized guide roller, and a rewind chuck arranged sequentially along the strip's running direction, and is electrically connected to a pulse power supply. The insulated energized guide roller comprises two centrally symmetrical conductive rollers mounted via a spring-floating mechanism. The insulated roll system includes an insulated work roller that directly contacts the strip. Insulated tension gauges are installed before and after the insulated energized guide rollers. This structure ensures continuous current loading through adaptive adjustment of the conductive contact; the insulated work roller and the insulated tension gauge respectively block leakage paths through the roll system and the measuring components; and the various units collaboratively construct a highly insulated main current loop, thereby systematically solving the problems of current leakage and unstable contact, significantly improving the effective efficiency and process controllability of the pulsed current during rolling.

This application provides a control method for a battery device, a battery management system, a battery system, and an electrical device. The control method includes: acquiring first parameters of the battery device, the first parameters including continuous current and / or power, and a required rate of decrease of allowable current and / or power; acquiring second parameters of the battery device, the second parameters including an allowable excess discharge capacity, which includes an additional discharge capacity of the battery device exceeding the continuous current and / or power; and adjusting the allowable current and / or power of the battery device discharge based on the first and second parameters. The control method, battery management system, battery system, and electrical device provided in this application can improve the performance and lifespan of the battery device and enhance the user experience.

The invention relates to a method (100) for operating an electric power converter (2), wherein the power converter (2) has two connections, namely an input (4) for an input voltage and an output (5) for an output voltage, and is designed to convert the input voltage into the output voltage, the method (100) having a step (S10) of initializing an overload value and the following steps (S20-S50) which are carried out repeatedly: - obtaining current information which describes the present current strength value of an electric current flowing at one of the connections; - determining a weighting value by evaluating a weighting function, which assigns a weighting value to at least one current strength variable, using the current strength value as the current strength variable, the weighting function assigning a first weighting value to current strength variable values at a specified current strength threshold and assigning a weighting value higher than the first weighting value to current strength variable values above the specified current strength threshold; - determining an incremental value on the basis of the present current strength value, the weighting value, and a continuous current value in such a way that the current strength has a positive effect on the magnitude of the incremental value and the continuous current value has a negative effect on the magnitude of the incremental value; and - determining an updated overload value by cumulatively linking the previous overload value and the incremental value.

The application provides a fast charging circuit of an energy storage device and a charging method and a charger thereof, wherein the charging circuit comprises a forward conversion module, the forward conversion module outputs a first stable current or a second stable current to the energy storage device through a transformer; an energy storage capacitor is electrically connected to an output power supply of the forward conversion module, and the energy storage capacitor is electrically connected to the energy storage device through a control switch; when the output of the charging circuit is switched from the first stable current to the second stable current, the control switch is closed, the energy storage capacitor charges the energy storage device, so as to accelerate the switching process from the first stable current to the second stable current; the energy storage capacitor is electrically connected to an output port of the transformer, the output port of the transformer is allowed to be switched, so as to maintain the voltage of the energy storage capacitor at a preset voltage. The application can generate continuous current and high-quality pulse current, and the charging efficiency is high.

This invention relates to a copper clip for parallel connection of high-power silicon carbide chips, used to achieve parallel interconnection of multiple silicon carbide chips. The copper clip includes a clip body and a chip bonding section. The clip body adopts a large-area, one-piece molded structure, and its area can cover the top of multiple silicon carbide chips to form a continuous current transmission channel. This copper clip has an ingenious structure. By setting the clip body and chip bonding section, and by adopting a large-area, one-piece molded structure, the clip body can cover the top of multiple silicon carbide chips to form a continuous current transmission channel. In other words, by integrating the copper clip into a large area, it can meet the high current carrying requirements of multiple chips in parallel connection, ensuring the service life of the copper clip while improving the user experience. This is conducive to the promotion and application of the aforementioned copper clip for parallel connection of high-power silicon carbide chips in the field of power semiconductor packaging technology.

This invention relates to the field of electron beam welding technology, specifically to an electron beam welding process for ultra-thick titanium alloy structural components. The process includes the following steps: placing a beam-inducing auxiliary process block and a beam-retracting auxiliary process block at both ends of the welding position on the workpiece to be welded. The thickness of both the beam-inducing and beam-retracting auxiliary process blocks is greater than that of the workpiece to be welded. Sequentially performing initial welding, stable welding, and final welding on the upper surface of the beam-inducing auxiliary process block, the welding surface of the workpiece to be welded, and the upper surface of the beam-retracting auxiliary process block, respectively. The initial welding current is a continuous current that first increases and then stabilizes; the stable welding current is a constant current; and the final welding current is a continuous current that first increases and then decreases. The purpose of this electron beam welding process for ultra-thick titanium alloy structural components is to solve the problem of the difficulty in controlling the melt flow and forming of welds in ultra-thick titanium alloy structural components.

This application discloses a wireless power receiving circuit and a signal hybrid modulation method. The wireless power receiving circuit includes an interleaved buck converter module, a full-bridge module, a signal phase-splitting module, and an output module. The full-bridge module, the signal phase-splitting module, and the interleaved buck converter module are all connected to a peripheral wireless compensation circuit. The interleaved buck converter module is configured to perform hybrid modulation based on the power carrying signal to obtain multiple PWM signals to control the operating state of each switching transistor. This application utilizes the interleaved buck converter module to perform hybrid modulation to achieve wide input, wide load, and continuous current output. By integrating a full-bridge rectifier into the interleaved buck converter module, the size of the receiver converter is reduced, and the smooth output current characteristic is inherited, which is beneficial for high output current capability in high-power application scenarios. This enables the wireless power transmission device to be applied to low-voltage, high-current, high-density wireless charging systems.

Method (100) for operating an electrical power converter (2), wherein the power converter (2) has two terminals, namely an input (4) for an input voltage and an output (5) for an output voltage, and is configured to convert the input voltage into the output voltage, wherein the method (100) comprises a step (S10) of initializing an overload value and the following repeatedly executed steps (S20-S50): - Receiving current information that describes the instantaneous current value of an electric current flowing at one of the terminals; - Determining a weighting value by evaluating a weighting function which assigns a weighting value to at least one current variable, using the current value as the current variable, wherein the weighting function assigns a first weighting value to values ​​of the current variable at a given current threshold and assigns a higher weighting value than the first weighting value to values ​​of the current variable above the given current threshold; - Determining an incremental value as a function of the instantaneous current value, the weighting value, and a continuous current value, such that the current has a positive effect on the magnitude of the incremental value and the continuous current value has a negative effect on the magnitude of the incremental value; and - Determining an updated overload value by cumulatively linking the previous overload value and the incremental value.

This invention belongs to the field of communication engineering technology, specifically an ultra-wideband multi-segment composite disc-cone antenna, comprising a radiator assembly, a feed assembly, an impedance matching assembly, and a grounding assembly. The radiator adopts a multi-segment composite structure, with a continuous copper plate conical surface in the low-frequency region and a radial spoke array in the high-frequency region, combined with a multi-layer coaxial disk and an electrically loaded structure. The feed end integrates a stepped impedance transformer and an LC composite matching network, and is equipped with a choke slot to suppress common-mode current. A wide grounding plane is configured at the bottom. By utilizing the segmented tapered surface and spoke array composite structure, the low-frequency continuous current path and the high-frequency discrete current path are separated on the same radiator, avoiding mutual interference between high- and low-frequency electromagnetic behaviors.

The present application relates to the technical field of fuel cell performance evaluation, and discloses a fuel cell polarization curve fitting method, device, equipment, medium and product, the method comprises the following steps: obtaining fuel cell original operation data, including sample points at continuous time, each sample point includes instantaneous current and instantaneous voltage; based on the continuous current gradient change, the steady state interval of the fuel cell operation is identified; the sample points at the steady state interval corresponding time are subjected to cluster analysis, a plurality of class clusters and cluster centers are obtained; a weighted data set is constructed based on the sample points and the cluster centers in the plurality of class clusters, wherein the weight of the cluster center is greater than the weight of the sample points in the plurality of class clusters; the current-voltage change relationship is fitted according to the weighted data set, and a polarization curve is obtained. The present application can construct a polarization curve that adapts to the actual running state of a vehicle.

The application discloses a three-phase four-bridge-arm permanent magnet synchronous motor system open-circuit fault-tolerant control method considering freewheeling current, comprising the following steps: according to the open-circuit fault position and quantity, establishing the freewheeling current loop of the upper and lower tubes of the same bridge arm and the single tube open circuit, and decomposing the freewheeling current component; under the consideration of the third harmonic back electromotive force, aiming at the torque disturbance caused by the freewheeling current, designing the combined 1 current compensation torque DC component, the combined 2 current compensation torque disturbance caused by the freewheeling current fundamental component, the combined 3 current compensation torque disturbance caused by the freewheeling current third harmonic component, combining the content of each component of the freewheeling current to give a torque compensation scheme, and obtaining a final phase current reconstruction scheme; obtaining the dq0 current given value through coordinate transformation, obtaining the dq0 axis voltage given value by using a proportional integral resonant regulator; obtaining the abc phase voltage given value through coordinate transformation; combining the duty cycle calculation and PWM modulation to obtain the driving signal for controlling the permanent magnet synchronous motor.

A magnet continuous current switch (MPCS) includes a superconducting wire assembly (10) having a connection port (11) at its end, and forming a main LTS conductor path (12) of low-temperature superconducting material and a parallel HTS shunt (13) of high-temperature superconducting material. Compared to superconducting magnets with conventional low-temperature material MPCS, the time required from the start of the rising field to the magnet being operable is reduced.

The embodiment of the present application provides a battery device control method, a battery management system, a battery system and a power utilization equipment, the control method comprises the following steps: obtaining a first parameter of a battery device, the first parameter comprises a requirement of a continuous current and / or power and a permissible current and / or power falling rate; obtaining a second parameter of the battery device, the second parameter comprises a chargeable excess electric quantity, the chargeable excess electric quantity comprises an additional chargeable quantity of the battery device exceeding the continuous current and / or power; and controlling adjustment of permissible current and / or power of the battery device charging according to the first parameter and the second parameter. The battery device control method, the battery management system, the battery system and the power utilization equipment provided by the embodiment of the present application can reduce the risk of overcharging of the battery device, and improve the performance and the service life of the battery device.

A dynamic power consumption shaping method for a memory controller chip includes: acquiring the channel enable signal vector of the current physical layer interface; extracting the corresponding equivalent admittance matrix based on the enable signal vector; calculating the instantaneous power density characteristic value of the silicon interposer in conjunction with the current operating voltage; statistically analyzing the arrival rate of memory read / write instructions according to a set long clock window and a short clock window respectively, obtaining a long-period moving average reference value and a short-period transient characteristic value, and calculating the statistical deviation; triggering a load burst interrupt signal when the statistical deviation exceeds the value of a hardware threshold register; and, in response to the load burst interrupt signal, forcibly splitting continuous memory access bus transactions exceeding a preset burst length threshold into several sub-transactions, and inserting a programmable number of clock idle cycles between the send enable signals of adjacent sub-transactions to shape continuous current pulses into discontinuous pulses. This method enables fine-grained power consumption shaping during load bursts.

A kind of permanent magnet synchronous motor full-order terminal sliding mode speed adaptive observation method belongs to motor control field.Solve the existing permanent magnet synchronous motor sliding mode observation method when motor high-speed rotation exists observation speed slow, the problem of poor smoothness of observation signal.The present application collects the three-phase current of permanent magnet synchronous motor stator winding, obtains the phase current in two-phase stationary coordinate system;Using the phase current in two-phase stationary coordinate system and the alpha axis component and beta axis component of motor stator winding terminal given voltage, establish the full-order motor model based on extended back electromotive force;Design the observation equation of motor stator current extended back electromotive force;Establish the stator current error equation;Calculate the stator current error, design full-order terminal sliding surface, obtain sliding mode control law;Using Lyapunov function, obtain continuous current observation signal;Design speed adaptive law, obtain the speed of permanent magnet synchronous motor rotor.The present application is suitable for the speed observation of permanent magnet synchronous motor rotor.

The present invention provides a power conversion system that enables highly efficient power transmission over a wide voltage range, while simultaneously achieving both stable power control and responsiveness. [Solution] The control device 106a controls the phase of the drive pulse edge to control the period during which both the primary and secondary AC voltages of the isolation transformer 102 are at zero voltage, or controls the phase of the drive pulse edge to control the period δ during which the primary and secondary AC voltages of the isolation transformer 102 are at opposite polarity, according to the magnitude of the control variable D. At that time, the power or current transmitted through the isolation DC / DC converter changes linearly with respect to the input control variable over the entire range including the control range of the discontinuous current mode and the control range of the continuous current mode. Input control variables A transformation is applied to generate control variables.