44 results about "Active load" patented technology

The invention relates to the technical field of industrial equipment control, and discloses a dynamic maintenance management method and system based on the full life cycle of test equipment, and the method comprises the steps: obtaining a time domain vibration signal and torque current data during the operation of the equipment through a high-frequency vibration sensor and a current loop feedback interface; calculating an accumulated damage gradient parameter representing the physical recession degree of the mechanical transmission chain; the parameters are input into a preset damage stress coupling model to solve the maximum radial impact force allowed to be borne by the damaged part, and the impact force is mapped into a dynamic capability boundary for carrying out logic constraint on the motion planning instruction; and the motion controller reconstructs an ideal speed curve by using the boundary in an interpolation period, and reshapes a torque load spectrum output to a servo motor by reducing the jump of acceleration and deceleration sections. The problem that an existing static control strategy is mismatched with the dynamic aging characteristic of equipment is solved.

The invention relates to the technical field of amplifiers, in particular to a variable gain amplifier with a wide linear gain range and a working method, and the variable gain amplifier comprises the steps that a linear gain generation circuit receives a differential input signal and provides gain-adjustable differential output based on linear control voltage; the linear gain generation circuit comprises at least one stage of variable gain unit which comprises differential input pair transistors MN1 and MN2. The load resistor elements R1 and R2 are connected between the power supply voltage VDD and the drain electrodes of the differential input pair transistors MN1 and MN2; the tail current source MN3 provides bias current for the differential input pair transistors MN1 and MN2; the active load network is connected between the drain electrodes of the differential input pair transistors MN1 and MN2 and the ground; the active load network comprises a control tube MN8, the control tube MN8 works in a sub-threshold region, a grid electrode receives linear control voltage, equivalent impedance of the active load network is enabled to be in exponential change along with the linear control voltage through exponential I-V characteristics, and dB linear gain adjustment of the variable gain unit is achieved.

This invention provides an optimized system for improving the slew rate of a Line Driver, comprising a differential input module, a bias current module, an amplification module, an active load module, and a mirror load module. The differential input module receives the input signal and converts the voltage signal into a current signal. The bias current module provides a stable bias current to the circuit. The amplification module receives the current signal from the differential input module and achieves voltage gain. The amplification module is electrically connected to the active load module. The active load module can improve the amplification gain of the amplification module, replicate the current, and stabilize the output node. The mirror load module can replicate the signal amplification path of the amplification module to achieve symmetrical output, thereby improving the signal amplification effect and anti-interference reliability of the circuit and solving the problem of limited slew rate in traditional optimized systems for Line Drivers.

The application discloses a base station load balancing method and device, a storage medium and an electronic device, and relates to the technical field of communication. The method comprises the following steps: predicting the distribution characteristics of network service demand of a target scene in a target time period based on historical service data; adjusting the resource distribution of the base station according to the distribution characteristics; receiving a target service combination in the target time period, wherein the target service combination comprises M services and the priority of each service, and M is an integer greater than or equal to 1; based on the resource distribution of the base station, adjusting the target model according to the target service combination and a target algorithm, and generating a load balancing strategy for the target service combination based on the adjusted target model. The application solves the technical problem that the traditional load balancing algorithm is inefficient and cannot realize active load management when the base station load balancing scheme in the prior art faces rapid changes and burst conditions.

The application discloses a signal demodulation circuit and a digital isolation circuit, wherein the signal demodulation circuit is arranged at a receiving end of the digital isolation circuit and comprises a common-gate amplification module, a demodulation module and a common-gate amplification module; the common-gate amplification module is used for receiving full-differential signals output by an isolation module in the digital isolation circuit and amplifying the full-differential signals; the demodulation module is connected with the common-gate amplification module and is used for demodulating the amplified full-differential signals and outputting the demodulated full-differential signals; and the common-gate amplification module comprises a first active load, a second active load, a first NMOS tube, a second NMOS tube, a first coupling capacitor, a second coupling capacitor, a first sampling resistor and a second sampling resistor. The circuit has high anti-interference capability.

The invention relates to the technical field of power supply systems, in particular to a micro-grid power supply control method and system based on load monitoring, and the method comprises the steps: obtaining the load data and voltage data of each power utilization node in a micro-grid; dividing the micro-grid into a plurality of power utilization areas; determining a likelihood index that load reduction belongs to active load reduction; and determining the power supply index of each power utilization node based on the historical synchronous load data, and adjusting the power supply priority in combination with the possibility index to perform local power supply regulation and control of the micro-grid. According to the method, the load in the micro-grid is monitored in real time, dynamic partitioning is implemented based on the load association between the power utilization nodes, and the power supply priority is adjusted in combination with the distinguishing result of active and passive load reduction and the historical load fluctuation characteristics, so that accurate local power supply regulation and control considering the electrical association and the time sequence characteristics is realized; and the reliability and the electric energy quality of micro-grid power supply are improved.

The invention discloses a W-band high-backoff-efficiency power amplifier adopting a power synthesis technology, and relates to the technical field of millimeter wave integrated circuits, and the power amplifier comprises a power distribution network, a differential driving stage, an inter-stage matching network, a differential output stage, an active load modulation network and a self-adaptive bias network. A radio frequency input signal is divided into two paths of signals which are equal in amplitude and have a phase difference of 90 degrees through the power distribution network, and after the two paths of signals are subjected to differential amplification through the main path and the auxiliary path respectively, in-phase power synthesis output is completed through the active load modulation network. A self-adaptive bias network is introduced for an auxiliary circuit amplifier, a radio frequency input signal is accessed to the input end of the self-adaptive bias network, and auxiliary circuit bias is dynamically adjusted according to the size of input power: an auxiliary circuit is closed or slightly opened when the signal is small, and is completely opened when the signal is large, so that high linearity and high power additional efficiency are simultaneously realized in a wide power range. The power amplifier disclosed by the invention still keeps high efficiency in a backoff region, and is suitable for 5.5 G / 6G communication, radar and imaging systems.

The application relates to a silicon-based millimeter wave broadband compact double-drive high-efficiency Doherty power amplifier, belonging to the technical field of radio frequency integrated circuits, comprising an input quadrature coupler, a main and auxiliary two power amplifier paths and a broadband load modulation output network; wherein the power amplifier path adopts a differential common source and common gate unit with cross-coupling capacitance and a double-mode drive topology to improve the gain and efficiency of the millimeter wave frequency band; the output network adopts a slow wave transmission line structure combined with a cascade coupling line pair to realize broadband active load modulation and absorb transistor parasitic capacitance, and simultaneously optimize the chip area. Thus, the problem that the efficiency and bandwidth are difficult to be considered simultaneously due to the limited load modulation bandwidth and the decreased transistor gain of the traditional silicon-based millimeter wave Doherty power amplifier is solved.

The application provides a substation reactive power control limit value adjustment method and device, through a first reactive power limit value interval, a second reactive power limit value interval, a control switching threshold value and a preset condition, a target reactive power control limit value interval of the current substation reactive power control is determined, that is, the automatic switching of the reactive power limit value interval based on the control mode switching threshold value, the dynamic setting of the reactive power control limit value is realized. When the active load of the substation is low, the reactive power limit value calculation is too small, which leads to the problem of reactive power control lockout, according to the different load operation states of the substation, the dynamic setting of the reactive power limit value is carried out, a more reasonable reactive power limit value interval is given, and the problem of reactive power control lockout caused by unreasonable limit value is avoided, the application can improve the operation control effect of the substation, has engineering practicability, and has a remarkable effect on supporting the economic operation of the power grid.

A method for detecting a load connection status of an energy storage power supply including an inverter power supply, comprising the steps of: (S1) sampling an output voltage and an output current of the inverter power supply and calculating an output visible power; and (S2) determining whether the visible power is less than a predetermined power threshold, and if the visible power is greater than the predetermined power threshold, detecting that a load is connected to the energy storage power supply; and (S3) executing an active load online detection algorithm to perform secondary detection if the visible power is less than the predetermined power threshold, and determining whether a load is connected based on the result of the secondary detection. This method can automatically recognize the load connection status, and can reduce erroneous determination of the load connection status when the connected load is a small-power load, thereby improving the accuracy of detecting the load connection status of the energy storage power supply, thereby avoiding the inconvenience of turning off the output of the inverter power supply and disconnecting the load due to erroneous determination.

1. Name of the product in this design: Graphical User Interface for Circuit On / Off Configuration and Data Display of Electronic Equipment. 2. Purpose of this design: An electronic device. 3. The key design features of this product are: the content of the graphical user interface in the electronic device. 4. The picture or photo that best illustrates the key design points: Design 1 front view. 5. As is customary, the top view, bottom view, left view, right view, and rear view of each design are omitted. 6. Design 1 is designated as the basic design. 7. Purpose of the graphical user interface: To configure the opening and closing combinations of single-control and multi-control switches in the circuit, display the circuit path in red highlight, and display and configure data in the dialog box window; for modified data, an asterisk (*) is added to the data label on the main interface. 8. Human-computer interaction method of graphical user interface: The main view of Design 1 displays the initial graphical user interface. Clicking the "Pin5" item in the tree control on the left side of the interface will enter the change state diagram 1 of Design 1. The circuit diagram is displayed on the right side of the interface. Clicking the single-control switch legend to the right of the "Active Load" text in the circuit diagram indicates that the switch is closed and enters the change state diagram 2 of Design 1. Design 2 main view displays the initial graphical user interface. Click the "Pin5" item in the tree control on the left side of the interface to enter Design 2 change state diagram 1; click the multi-control switch legend above the "Active Load" text in the circuit diagram to indicate the switch switching contact here, and enter Design 2 change state diagram 2. Design 3 main view displays the initial graphical user interface. Click the "Pin5" item in the tree control on the left side of the interface to enter Design 3 change state diagram 1; click the input box to the right of the "Vih" text in the circuit diagram to pop up the parameter setting dialog box and enter Design 3 change state diagram 2; modify all the input box data in the dialog box to "2V", click the "OK" button to close the dialog box and enter Design 3 change state diagram 3. The corresponding data in the circuit diagram has been modified. Design 4's main view displays the initial graphical user interface. Clicking the "Pin5" item in the tree control on the left side of the interface leads to Design 4's change state diagram 1. Clicking the input box to the right of the "Ioh" text in the circuit diagram brings up a parameter setting dialog box, leading to Design 4's change state diagram 2. Modifying the data in the Ioh input box to "23mA" and the data in the Iol input box to "15mA" in the dialog box, and clicking the "OK" button to close the dialog box, leads to Design 4's change state diagram 3, where the corresponding data in the circuit diagram has been modified. Design 5's main view displays the initial graphical user interface. Clicking the "Pin5" entry in the tree control on the left side of the interface leads to Design 5's change state diagram 1. Clicking the input box to the right of the "Voh" text in the circuit diagram brings up a parameter setting dialog box, leading to Design 5's change state diagram 2. Modifying the data in the Voh input box to "30uV" and the data in the Vol input box to "25uV" in the dialog box, and clicking the "OK" button to close the dialog box, leads to Design 5's change state diagram 3, where the corresponding data in the circuit diagram has been modified.

The application relates to an active load response system based on low communication demand, wherein a central control module and a plurality of frequency modulation modules are connected through distributed control communication; the frequency modulation module comprises a data receiving and transmitting unit, a data processing and storage unit and an active load response adjusting unit; the data receiving and transmitting unit is used for obtaining operation data of the central control module, other frequency modulation modules and power loads; the data processing and storage unit is used for determining consumed power of the active load response adjusting unit according to the operation data obtained by the data receiving and transmitting unit and the operation state of the active load response adjusting unit; and the active load response adjusting unit is used for adjusting consumed electric energy of the load through a communication mode or a direct adjustment mode of load power voltage and frequency. The application solves the technical problems of a large number of devices, small capacity and wide distribution in the prior art, improves the technical performance of device clusters, and provides frequency support and adjustment for a power system.

A device for protecting against a short-circuit occurring on a high-voltage DC power supply line between a DC source and an active load, the device including a bypass circuit formed of a contactor K3 and a fuse F2 connected in series and set up parallel to the active load via a line independent of the high-voltage DC power supply line, the bypass circuit being configured such that most of the current passes through it once the fuse F2 has melted.

The invention discloses a reactive power-active power coordinated regulation and control method for reducing the power consumption rate of a comprehensive station in a sea wind field, and aims to solve the problems that the power consumption rate of the comprehensive station is high due to complicated equipment and special scenes in the sea wind field, and the adaptability in the prior art is poor. According to the method, data support is provided for subsequent regulation and control by monitoring the power of a sea wind field, the equipment operation state and key parameters of a power grid in real time; the active load of the SVG is flexibly regulated and controlled according to different scenes; the wind generating set and the SVG are promoted to collaboratively optimize the grid-connected A self-consumption reactive power reference value in the station is accurately calculated, so that an SVG adjustment dead zone is optimized; and meanwhile, cooperative regulation and control are carried out by closely combining the grid-connected metering point position, the multi-voltage grade requirement and the special scene. After the scheme is implemented, the active power consumption of the SVG can be effectively reduced, the standard-reaching rate of a power factor exceeds 95%, the monthly power regulation electric charge is reduced by more than 370000 yuan in a 1300MW sea wind field, the adaptability is high, the implementation cost is low, and large-scale popularization and application in the existing sea wind field are facilitated.

The invention provides a method and device for improving AGC frequency modulation response speed of a large-scale hydraulic power plant, and the method comprises the steps: obtaining the active adjustment rate of each water-turbine generator set under different water heads, and building a priority adjustment sequence of the units according to the adjustment rate; based on the current active load state and the adjustment margins, the small load increase priority and the small load decrease priority of each unit are determined, and under the condition that the adjustment margins are the same, the priorities are ranked from high to low according to unit numbers; when the whole plant AGC enters a frequency modulation mode, active load distribution is carried out according to the adjustment rate and the priority, a unit with the highest adjustment rate and the highest priority is preferentially selected for adjustment, and the minimum distribution unit number principle is followed. According to the method, the AGC regulation speed of the large hydraulic power plant in the frequency modulation auxiliary service mode can be improved, the response performance under the small-load working condition is optimized, it is ensured that the unit with the fastest regulation speed continuously participates in frequency modulation, and therefore the comprehensive frequency modulation performance index K value of the whole plant is remarkably improved.

The application provides a novel low-power-consumption low-complexity active dual-function reconfigurable intelligent surface unit and surface, which comprises: an active load for amplifying an incident electromagnetic signal to obtain an amplified electromagnetic signal; a power distribution network for receiving the amplified electromagnetic signal transmitted by the active load and distributing the power of the amplified electromagnetic signal to obtain a power-distributed electromagnetic signal; a first phase shifter for receiving the power-distributed electromagnetic signal transmitted by the power distribution network, modulating the phase of the power-distributed electromagnetic signal, and outputting a modulated-phase electromagnetic signal; and a second phase shifter for receiving the power-distributed electromagnetic signal transmitted by the power distribution network and outputting the modulated-phase electromagnetic signal. Due to the low cost, low power consumption and easy installation of the active dual-function reconfigurable intelligent surface, the application can be widely promoted in the field of wireless communication.

The present invention relates to an active load (10) for reconstructing a phase angle of an alternating voltage output by a device under test (14) having at least one DUT switching unit, the active load comprising: a measuring device (16) for measuring the alternating voltage output by the device under test (14); a reconstruction device (24) which is designed to reconstruct a phase angle of the alternating voltage; a switching device (20); and a control device which is signal-connected to the reconstruction device (24) and is designed to regulate, via the switching device (20), a load point of the device under test (14) in phase depending on the reconstructed phase angle of the alternating voltage.

The invention discloses a three-dimensional ultra-wideband reconfigurable power amplifier based on cooperative modulation and a building method, and relates to the technical field of power amplifier monolithic microwave integrated circuits, the three-dimensional ultra-wideband reconfigurable power amplifier based on cooperative modulation comprises a first circuit layer, an adapter plate circuit and a second circuit layer, the first circuit layer comprises a first ultra-wideband coupler, a second ultra-wideband coupler, a third ultra-wideband coupler, an unequal power divider and a balanced power amplifier unit; the second circuit layer comprises a control power amplifier unit and an ultra wide band phase shift attenuation unit. According to the invention, the amplitude and the phase of a radio frequency signal are adjusted at the same time through the ultra-wideband phase shift attenuation unit, so that expansion of adjustable dimensions is realized; and active load modulation is carried out on the source impedance and the load impedance of the balanced power amplifier unit through the unequal power divider, so that dual-path cooperative modulation is realized. A three-dimensional structure is adopted, so that the overall size of the amplifier is remarkably reduced.

The application discloses a kind of outer rotor magnetic suspension bearing's double-rotor large energy storage equipment magnetic suspension bearing, including base, double motor, elastic diaphragm coupling, radial magnetic bearing, electromagnetic loading assembly, outer rotor and inner rotor.Outer rotor is coaxially nested envelope in the outside of inner rotor, is made of carbon fiber composite material to promote energy storage inertia;Radial magnetic bearing realizes the non-contact support of double rotor by controlled electromagnetic force;Electromagnetic loading assembly is distributed in key stress position, for applying active load or vibration suppression force.Control system integrates electric eddy current sensor, uses interval control algorithm based on uncertainty quantification, parameter fluctuation is handled as bounded interval variable, dynamically calculates displacement envelope line and actively adjusts stiffness and damping, suppresses nonlinear vibration and prevents rub-impact.The application has the advantages of large energy storage density, strong anti-rubbing ability, high running stability, etc., can significantly improve the reliability and energy cycle efficiency of large flywheel energy storage equipment under extreme conditions.

The invention discloses a low-power-consumption high-speed two-stage dynamic comparator for an analog-to-digital converter, relates to the technical field of integrated circuits, and aims to solve the problems that a traditional dynamic comparator is high in power consumption, limited in speed and uncontrollable in balance between offset voltage and performance. The comparator comprises a two-stage dynamic structure of a pre-amplification stage and a latch stage, wherein the pre-amplification stage takes a PMOS transistor as an input tube and is matched with an NMOS switching tube and a PMOS active load tube to realize preliminary amplification of an input differential signal; the latch stage adopts a PMOS latch structure instead of a traditional NMOS latch structure. And through two paths of delay controllable clock signals (clkb1 and clkb2), the latch stage is controlled to be activated in a delayed manner after the preamplifier stage works for a preset time, and meanwhile, a current source of the preamplifier stage is closed when the latch stage is activated. By adjusting latch level delay time, offset voltage, power consumption and speed can be flexibly balanced, performance requirements of different analog-to-digital converters are met, and the analog-to-digital converter is suitable for scenes such as portable equipment, communication systems and the like with high requirements on energy efficiency and speed.

An amplifier circuit, a comparator, and a solid-state imaging device capable of suppressing RTS noise are provided.An amplifier circuit in the present disclosure includes an active load and a plurality of input transistors electrically connected to the active load, in which gates of the plurality of input transistors are electrically connected to each other, and the plurality of input transistors includes two or more input transistors connected in series with each other.

This invention relates to the field of static testing technology, and discloses a support and boundary simulation device and method for static testing of a long straight cylindrical structure. The invention employs six-degree-of-freedom statically determinate constraints to constrain the rigid body displacement of the cylindrical structure without restricting the elastic deformation of the main beam. Active loads are applied to the outer docking fixture, while passive balancing loads are applied to the constraint points of the inner docking fixture. This ensures the accuracy of the boundary load simulation at the end face of the cylindrical structure while reducing the restriction on the elastic deformation of the cylindrical structure by the constraints. Furthermore, the change in constraint reaction force can be monitored in real time during the test loading process, improving the safety and reliability of the test. This invention optimizes the cantilevered fixed-support constraint of the current conventional testing method to a hinged constraint at both ends of the long straight cylindrical structure, shortening the deformation at the maximum deformation point of the long straight cylindrical structure. This improves the accuracy of test loading and structural assessment, enhances the safety of the test, and reduces the complexity of the test loading system.

The present application relates to a system and method for testing the active load of a cascaded high-voltage frequency converter unit based on a PCS, comprising a cascaded high-voltage frequency converter unit to be tested, a filter reactance, a controllable rectifier unit, a PCS device; the rectifier side of the cascaded high-voltage frequency converter unit to be tested is connected to the grid voltage, and the inverter side is connected to the controllable rectifier unit through the filter reactance; the controllable rectifier unit is connected to the positive and negative bus of the PCS device; and the PCS device is connected to the grid. The present application can test the rated power temperature rise, the overload temperature rise, the over-temperature protection, and the feedback function temperature rise of the cascaded high-voltage frequency converter unit. In addition, the temperature rise test data of different currents can be compared, and the thermal simulation data can be compared at the same time to perfect and optimize the thermal simulation data platform, optimize the product design, and improve the product reliability.

A transceiver including a voltage regulator, a current regulator and a controller. In response to the voltage regulator receives a supply voltage from an active load, the voltage regulator measures quantified amounts of system current during successive time periods. The system current is consumed by the active load. The current regulator flows load current to ground. The controller processes the quantified amounts to ascertains an operating point for the system current. In response to the current regulator flows the load current to ground, the controller causes the current regulator flows the load current by an amount that clamps the system current to the operating point.

The invention relates to the technical field of railway electrified traction power supply systems, in particular to a regenerative braking energy consumption method, device and equipment, a storage medium and a product. Determining a first active load of the partition for the first substation and a second active load of the partition for the second substation; wherein each partition is provided with an energy routing device; performing logical judgment according to the first active load and the second active load to obtain a transferred active power value; determining a voltage compensation strategy for the energy routing device according to the transferred active power value; sending the voltage compensation strategy to the converter; wherein the voltage compensation strategy is used for indicating the converter to fuse the port energy of the first substation and the port energy of the second substation, and mutual absorption of regenerative braking energy is achieved; according to the method, the situation that energy fusion or scheduling between the substations cannot be carried out due to communication failure or communication delay between the substations and the substations is avoided, and the absorption capacity of regenerative braking energy is guaranteed.

The invention provides a hygroelectric charging and power management system. The system comprises at least one single layer or a bilayer of flexible hygroelectric polymer stacked together in series to generate power on collision with a water molecule, and at least one rechargeable battery having an input terminal and an output terminal. The input terminal is electrically connected to the single layer or the bilayer of flexible hygroelectric polymer to receive and store the generated power. The system further comprises at least one charger module to modulate between the single layer or the bilayer of flexible hygroelectric polymer and the rechargeable battery. The system applies Pulse Width Modulation (PWM) on the charger module to balance real-time recharging of the battery and to ensure constant power supply to a device under active load.

The invention discloses a power-traffic coupling system prevention and control method for toughness improvement. The method comprises the following steps: 1) obtaining network parameters and operation parameters of a power system and a traffic system; 2) acquiring scene data, including active load and reactive load of a power system, travel demands of different starting and ending points in a traffic system, and proportions of electric vehicles; 3) based on the acquired network parameters, the operating parameters and the scene data of the two systems, constructing an operating constraint under a conventional working condition and an operating constraint under a fault working condition; and 4) based on the constructed constraint, taking a price signal and distributed power supply output as regulation and control objects, and taking minimization of the operation cost of the two systems under a conventional working condition as a target function, establishing a power-traffic coupling system prevention and control model oriented to toughness improvement, and solving to obtain a prevention and control strategy for ensuring the operation safety of the power-traffic coupling system after the fault.

Light detection with reduced noise is disclosed. In one example, a comparator compares a signal with a reference signal and outputs a comparison result. The comparator includes a differential circuit that outputs a differential voltage between the signal and the reference signal, and an active load circuit electrically connected to the differential circuit, in which the active load circuit includes first and second transistors provided on a surface of a substrate, and the first and second transistors have channel regions extending in a direction substantially perpendicular to the surface of the substrate.

An input stage includes a differential pair and an active load. An output stage includes an output transistor coupled to receive an output signal of the input stage. An output variation detection circuit is connected to an output terminal of an operational amplifier and generates a first current corresponding to an output voltage generated at the output terminal. A phase compensation circuit supplies, to the output terminal, a second current corresponding to a gate voltage of the output transistor, and supplies, to the active load, a third current corresponding to the second current.