65 results about "Resistive load" patented technology

Inconclusive and inconsistent results from existing haptic testing systems, e.g. for trackpads, which include rigidly mounted resistive load cells and accelerometers, prevent accurate results, especially in a high-volume production context. The use of a rigidly mounted sensor is unsuitable because a trackpad will generally be softer than the actuation system, whereby, when the haptic event is fired, the vast majority of the energy will be lost in the trackpad, while the sensor remains almost stationary. Accordingly, an improved test probe for a haptic device configured for mounting on a robotic arm, comprises: a contact tip configured for contacting the haptic device; a sensor configured for measuring a threshold force of the piezoelectric actuator device, and an haptic characteristic, e.g. acceleration, of a resulting haptic response thereof at a same time and a same location; and a compliant element configured for enabling the sensor to move relative to the haptic device.

The invention discloses a rapid soft start control method and device for a switching power supply. The method comprises the following steps: determining a target voltage output by a soft start preprocessing circuit in a steady state according to a preset standard voltage, a preset standard current and a load resistance value of a resistive load; determining a target duty ratio corresponding to a switching tube of the soft start preprocessing circuit in a steady state according to the target voltage and a preset input voltage of the switching power supply; a first control signal is sent to the pulse width modulation circuit, and the duty ratio of the switching tube is adjusted to the maximum duty ratio; monitoring that the real-time output voltage of the soft start preprocessing circuit is increased to the target voltage through a voltage sampling circuit; and a second control signal is sent to the pulse width modulation circuit, and the duty ratio of the switching tube is adjusted from the maximum duty ratio to the target duty ratio, so that rapid soft start of the switching power supply is realized and a steady state is reached. According to the invention, the soft start time of the switching power supply can be obviously shortened, and the switching power supply can rapidly reach a stable working state after soft start.

The invention provides an unmanned aerial vehicle wireless energy taking control method, device and system, and relates to the technical field of power systems and wireless charging. The method comprises the steps of obtaining power transmission line current parameters; based on the power transmission line current parameters, target load modes are determined, and the target load modes comprise a pure resistive load mode and a resistive-capacitive load mode; according to the target load mode, adjusting impedance characteristics of an adjustable electronic load in the unmanned aerial vehicle wireless energy taking control device and excitation parameters of an energy taking iron core in the unmanned aerial vehicle wireless energy taking control device; and according to the adjusted excitation parameters and impedance characteristics, the unmanned aerial vehicle wireless energy taking control device is controlled to output stable direct current voltage. The method is used for improving the energy taking stability and the energy taking efficiency of the unmanned aerial vehicle in operation states such as inspection, so that the unmanned aerial vehicle can work continuously, and the overall operation efficiency is improved.

The invention relates to a power regulation method for a heating element and to a control system for implementing said method, with said method comprising applying the cycle stealing technique to adjust the power supplied to the resistive load at multiple levels, such that the modulation period is increased, reducing the frequency of the current signal that modulates the carrier, in order to reduce the generation of harmonics. The control system comprises a controller (2) connected to a power regulator (3) that acts on the heating element (1), such that said controller (2) adjusts the power supplied by the regulator (3) to the resistive load of the heating element (1) using the fine-grain cycle stealing technique.

A method and controller are provided for operating an isolated or weakly connected electrical grid supplied by at least one fluctuating renewable energy source, such as wind or photovoltaic generation, in combination with a grid-forming controllable inverter coupled to a battery. The inverter operates as a master controller to regulate grid frequency and voltage, while the renewable sources operate as slaves. Battery charging and discharging are controlled according to deviations in grid frequency and charge level, with slopes defined for smooth power transitions. Additional selectively driven or non-driven alternators may be coupled in parallel with the inverter to stabilize frequency, provide inertia, reactive power, and short-circuit capacity, or support load changes. Control logic further manages integration of combustion engine-driven generators, resistive load banks, and external energy banks, while accounting for battery temperature and charge thresholds, thereby ensuring stable grid operation under fluctuating generation and demand conditions.

The invention discloses a cascade and cross-coupling bandwidth trans-impedance amplifier for visible light communication, which adopts a fully differential topological structure and consists of a cascade enhanced input stage, an active current source load and a cross-coupling bandwidth compensation network, an enhanced feedback loop is constructed in a multi-stage cascade mode; a multi-stage common-source amplifier is connected in series in a feedback path of an input end; replacing a traditional resistive load with a current source: replacing a common-gate load resistor with the current source; the differential output end of the circuit is connected with a pair of cross coupling transistors, and the grid electrodes and the drain electrodes of the transistors are connected in a cross mode to form a positive feedback mechanism. The invention provides a novel RGC-TIA structure adopting optimized bias and cascade feedback, and by breaking through voltage margin limitation, high gain, wide bandwidth and good linearity and common-mode rejection performance are realized at the same time.

The application discloses a load switching circuit, a load switching method and a household device, wherein a receiving module, a control module, a resistive load module and an inductive load module are included. The receiving module acquires an instruction signal; the receiving module sends the instruction signal to the control module; the control module determines a load module corresponding to the instruction signal according to the instruction signal, selectively controls the resistive load module or the inductive load module to work, receives a control signal transmitted by the control module through the receiving module, and transmits the control signal to the resistive load module and the inductive load module; according to specific instructions of the control signal, it is determined whether the resistive load module or the inductive load module works, different load type modules work according to user requirements, and the problem that different loads require different topological circuit requirements is overcome.

A controller system for a bathing installation such as a spa, whirlpool bath or a pool, the bathing installation including a line voltage AC supply for selectively powering peripherals. The controller system includes an electronic controller configured to manage and control various peripherals such as heaters, pumps, and lights, by modulating the outputs to these peripherals, through the use of one or more Variable Frequency Drives (VFDs) for driving rotating loads and TRIACs with phase angle modulation for driving resistive loads. An exemplary embodiment also features a modular electronics design, allowing for flexible and customizable control of the spa system. Elements of the design include a high voltage bus, card edge connections, and the separation of high voltage and low voltage components.

This utility model relates to the field of electric arc experiment simulation technology, and in particular to a DC electric arc experimental platform, comprising: a DC power supply, an intelligent controller, an adjustable resistive load box, a DC electric arc generator, and a circuit breaker. The intelligent controller, DC power supply, circuit breaker, adjustable resistive load box, and DC electric arc generator constitute the main circuit. When the adjustable resistive load box is connected in series with the DC electric arc generator, it is used to simulate a series-type fault arc generated in a DC power supply system; when the adjustable resistive load box is connected in parallel with the DC electric arc generator, it is used to simulate a parallel-type fault arc generated in a DC power supply system. This utility model simulates the generation of DC electric arcs through experiments, facilitating subsequent exploration of the interaction mechanism between various physical quantities and the generation of DC electric arcs, and providing great convenience for studying the generation mechanism and characteristics of DC electric arcs.

The invention discloses a method for simulating a dynamic starting characteristic of a low-power Hall thruster, which comprises the following steps of: analyzing a transfer function form of each module, measuring input and output parameters of each module on a thruster entity, and obtaining a transfer function of each module through an MATLAB system identification tool box; rLC circuit structures corresponding to all the modules are designed respectively, transfer functions of the RLC circuit structures are made to be consistent with transfer functions obtained through system identification, parameters of all components of the RLC circuits are calculated, simulation is conducted through simulink, the parameters of the components are further adjusted and optimized, and simulation results are made to be basically consistent with dynamic starting characteristics and steady-state parameters of actually-measured parameters; and finally, the RLC circuits are connected according to the connection relation of all modules of the thruster. The simulated load device can be used for circuit simulation in the development stage of the PPCU and testing in the production stage and the system joint test stage, compared with a pure resistive load, the model can preposition the risk of poor dynamic matching between the PPCU and the thruster, performance optimization of the PPCU product is facilitated, and the iteration efficiency is improved.

Information is provided about the "Power Quality Analyzer" (PQA) [1] device, current transformers, toroidal rings, panel rails and the functions of these components. PQA [1] device detects and measures power quality problems by analyzing the quality of electrical energy. A toroidal current transformer [2] is a transformer used to measure or monitor current in electrical circuits. Toroidal rings [3] are used to direct or focus magnetic flux. Panel rails [4] are used to mount components in electrical panels in an orderly manner. In addition, the toroidal current transformer top cover [5] and toroidal current transformer bottom cover [6] protect the internal components of the current transformer and are used for mounting. The fact that these components can be plugged and unplugged reduces the cost of wiring between the measurement transformers and the PQA device [1] and ensures safety. In addition, it is stated that the invention increases data accuracy by reducing cables that create resistive loads over long distances. The invention also uses the advantage of being attachable and detachable / removable in order to ensure structured operation in complex power plants by allowing the toroidal rings [3] to be located near or on the PQA [1] device. The toroidal current transformer [2] can be connected to the Power Quality Analyzer [1] device with at least one connector or at least one cable and at least one cable connector. The connection method in question can be decided according to the proximity of the toroidal current transformer [2] to the Power Quality Analyzer [1], In dense and crowded panels, the ability to mount the toroidal current transformer on the device ensures the most efficient use..

Provided is a customer‑sited hybrid generator system that coordinates a bidirectional inverter, an energy storage battery, an engine‑driven generator, an optional renewable source, a controllable load bank, and an isolation switch under a supervisory controller, to supply facility loads and interact with a power grid. The controller enables multiple modes, including surge support during normal operation, under‑frequency export from the battery with generator takeover, over‑frequency import to charge the battery, and distributed curtailment using a resistive load thermally coupled to a liquid cooling loop. Electrically driven pumps and fans, a radiator, and a three‑way valve route coolant among power electronics, engine, and curtailment loops. During a grid outage, the system may connect the generator directly to a facility bus, while isolating the inverter so the battery‑backed inverter can provide parallel hybrid surge. The system interfaces with utility or VPP dispatch and supports either 50 Hz or 60 Hz interconnection

The application relates to a method and circuit for identifying short circuit of capacitive and resistive loads in an alternating current load, the circuit comprising a current detection unit A, a MOS tube switching unit B, a residual current sampling unit E, a load short circuit detection unit C of a live wire / zero line, a test power supply control unit D, a live wire / live wire short circuit detection unit F, an MCU operation control unit G and a power supply unit H; the method can separately or simultaneously identify short circuit between the zero line and the live wire, the live wire and the ground wire and the live wire and the live wire; the method is a fast identification method considering both the capacitive load false short circuit and the resistive short circuit (true short circuit) current, the short circuit protection time is less than or equal to 150 microseconds, the identification cycle time is less than or equal to 10 milliseconds, and through the circuit technology, the identification error phenomenon caused by the capacitive load connected to the load output end of the MOS tube electronic switch protection can be reduced.

A solar tracking system includes a solar array, a support structure configured to support the solar array, a driveshaft coupled to the support structure, a base configured to rotatably support the driveshaft, and an articulation system coupled to the driveshaft and configured to articulate the driveshaft relative to the base. The articulation system includes a gearbox coupled to the driveshaft. The solar tracking system also includes a motor mechanically operably coupled to the gearbox to cause the driveshaft to rotate, and a controller that determines a fault caused by the winding up of the driveshaft, and, in response to determining the fault, shorting the windings of the motor and / or providing power, which is generated by the motor when the unwinding driveshaft drives the rotation of the motor, to a load, such as an energy storage device, a resistive load, and / or a heating element.

The invention discloses a three-phase load test circuit for testing a motor driver, and the circuit comprises a three-phase bridge driver which is used for generating a three-phase AC voltage signal; the synchronous rectification module is used for synchronously rectifying the three-phase alternating-current voltage signal into a direct-current voltage signal and providing the direct-current voltage signal to an electronic load; the electronic load is used for simulating a resistive load and completing the test under the driving of the direct-current voltage signal; wherein the electronic load is set to be in a current source mode in which the magnitude of output current is adjustable; the MCU controller is used for calculating a PWM (Pulse Width Modulation) signal with a target duty ratio according to the electronic load feedback signal; the isolation driver is used for driving the three-phase bridge driver and the synchronous rectification module to work according to the PWM signal; the synchronous rectification module comprises a power inductor used for simulating an inductive load. A conventional resistive load test scheme is replaced by a scheme of combining an inductive load and an electronic load, and the method can be suitable for load verification test and aging screening test of the motor driver with any load current.

In certain examples, methods and semiconductor structures are directed to circuit-based apparatus in which an amplifier includes stacked, first and second circuit amplification stages to operate out of phase from one another for providing a push-pull operation, with each of the first and second circuit stages including a switching circuit and an impedance path to drive the switching circuit. The apparatus further includes a waveform-shaping circuit to shape, in response to each of the first and second circuit stages, a voltage signal for presentation to the switching circuit. As may be implemented in various more-specific examples, the apparatus may generate a constant output voltage with high efficiency across a wide range of resistive loads.

The invention discloses a non-intrusive air conditioner load decomposition method and a storage medium, and the method comprises the steps: collecting a high-frequency current sampling sequence at a user ammeter at a sampling rate not lower than 6400 Hz, and obtaining a time domain waveform sequence and a frequency domain harmonic sequence of the high-frequency current sampling sequence; a time domain convolutional network and a frequency domain convolutional network which are parallel are constructed as a feature extraction network, a trained feature extraction network is obtained through two-stage training, a high-frequency current sampling sequence obtained in real time is input into the trained feature extraction network, and a reconstructed air conditioner power waveform is output. According to the method, through time-frequency double-domain feature fusion and two-stage decoupling modeling, the problems that the air conditioning load and the resistive load are easy to confuse and are lost due to long-period dependence are solved, and the decomposition precision and robustness are remarkably improved.

The utility model relates to a load-adjustable simulation load capable of independently testing a plurality of power supplies with the same voltage class, which comprises at least three load units with the same topological structure, and each load unit is configured to be formed by connecting at least two load branches in parallel. Each load branch is provided with a branch switch KMRn for controlling the branch to be loaded into the load unit where the branch is located and a resistive load Rn, and a contact at the parallel connection position of each load branch in each load unit serves as a wiring port of the load unit; the wiring port of each load unit is led out to serve as an external interface of an analog load, and the wiring ports of the adjacent load units are connected in parallel through an isolating switch; and the PLC is electrically connected with the controlled end of each switch to realize corresponding electric control.

This semiconductor optical element comprises an optical modulator (151), a first optical waveguide (152), and a second optical waveguide (153) that are formed on a Si substrate (101). The second optical waveguide (153) comprises a second core (131), a third semiconductor layer (132), a fourth semiconductor layer (133), a third electrode (134), and a fourth electrode (135). The second optical waveguide (153) is optically connected to the first optical waveguide (152) and is a resistive load connected to the optical modulator (151).

The invention provides a load detection device. The load detection device comprises a control assembly, a load switching assembly and a load assembly, the load assembly comprises a load box body, an alternating current load structure and a direct current load structure; the load switching assembly is used for switching the alternating current to be communicated with the alternating current load structure and switching the direct current to be communicated with the direct current load structure; a plurality of ventilation holes are formed in the load box body; each of the alternating current load structure and the direct current load structure comprises a plurality of resistive load units; the resistance load unit comprises a heat dissipation air pipe, a resistance wire and a heat dissipation fan; the resistance wire is used for providing a resistance load, at least one part of the resistance wire is arranged in the heat dissipation air pipe, and the heat dissipation fan is communicated with the interior of the heat dissipation air pipe and at least one ventilation hole; the cooling fan drives airflow to flow through the resistance wire along the interior of the cooling air pipe so as to conduct convection heat dissipation. The load box solves the problems that in the prior art, a load box is poor in compatibility, and the testing efficiency and the heat dissipation efficiency of a load are low.

A high-temperature-resistant heat dissipation type pure resistive load device for testing comprises a pure resistive resistor, the pure resistive resistor is connected with a cooling fin, the cooling fin is connected with a first bottom heat insulation asbestos plate, and the two sides of the bottom heat insulation asbestos plate are provided with a first heat insulation asbestos plate and a second heat insulation asbestos plate respectively. According to the high-temperature-resistant heat dissipation type pure resistive load device for testing, current meeting the requirement can be provided for an electric energy meter through a pure resistive resistor, good heat dissipation is carried out for the electric energy meter by additionally arranging aluminum alloy cooling fins and a direct-current fan, and the high-temperature-resistant heat dissipation type pure resistive load device for testing can be used for testing the high-temperature-resistant heat dissipation type pure resistive load device for testing. The heat insulation asbestos board can isolate heat of the load device from being conducted to the ground of a laboratory, a battery-powered direct-current fan heat dissipation mode is adopted, electromagnetic radiation generated by the load can be reduced to the minimum, and normal testing of the electric energy meter is not affected.

The application discloses a three-phase load test circuit for testing a motor driver, comprising: a three-phase bridge driver for generating a three-phase alternating voltage signal; a synchronous rectification module for synchronously rectifying the three-phase alternating voltage signal into a direct current voltage signal and providing the direct current voltage signal to an electronic load; the electronic load is used for simulating a resistive load and completing test under the driving of the direct current voltage signal; wherein the electronic load is set as a current source mode with adjustable output current size; an MCU controller is used for calculating a PWM signal with a target duty cycle according to an electronic load feedback signal; an isolation driver is used for driving the three-phase bridge driver and the synchronous rectification module to work according to the PWM signal; wherein the synchronous rectification module comprises a power inductor for simulating an inductive load. The scheme of combining the inductive load with the electronic load is used to replace a conventional resistive load test scheme, and can be applied to load verification test and aging screening test of the motor driver with any load current size.

A vehicle monitoring device has terminals operably connected to a vehicle battery circuit via a connection port of a vehicle. A resistive load is also connected to the terminals. A computer is connected to the terminals and positioned to measure an open circuit voltage across the resistive load. The computer includes a processor and computer memory storing respective voltage measurements, and the respective voltage measurements correspond to available vehicle battery voltage.

The invention belongs to the technical field of marine lead-acid storage battery periodic treatment and maintenance, and discloses a marine standby low-voltage storage battery long-distance large-current discharge load device which is composed of a multi-gear direct-current power supply boosting unit and a multi-gear discharge resistive load unit. The multi-gear direct-current power supply boosting unit comprises a multi-gear three-phase rectifier transformer and a three-phase full-wave rectifier bridge, and the three-phase full-wave rectifier bridge outputs multi-stage direct-current stable voltage through variable line voltage output of the secondary side of the multi-gear three-phase rectifier transformer; the multi-gear resistive load unit is used for forming loads with different resistance values through parallel matching of load gears with different resistance values; the load device is connected with a marine standby low-voltage storage battery through a direct-current circuit breaker. Line loss and voltage drop caused by line internal resistance in long-distance line connection can be eliminated, and the problem that long-distance large-current discharging of the marine standby low-voltage storage battery through a discharging load is difficult to achieve is solved.

The invention provides an HIL signal conditioning device and method. The HIL signal conditioning device comprises an analog load, a first switching element, a second switching element and a control unit. The analog load comprises an inductive load and a resistive load which are connected in parallel; the first switching element is connected with the output end of the controller, the inductive load, the resistive load and the control unit, so that the output end of the controller is switched between the inductive load and the resistive load under the control of the control unit; and the second switching element is connected with the external power supply end, the controller common ground end, the analog load and the control unit, so that the analog load is switched between the external power supply end and the controller common ground end under the control of the control unit. Compared with the prior art, the HIL signal conditioning device and method provided by the invention can realize switching of load connection modes, and can adapt to a PWMO mode and a DO mode, so that dynamic switching of the load connection modes (pull-up / pull-down) can be realized, and a PWMO / DO multiplexing function can be adapted.

This invention provides a power device testing apparatus and method based on a resistive load. The apparatus includes an adjustable temperature test container for housing the power device under test (DUT), a test circuit, a drive circuit, and a power supply circuit. The test circuit includes one or at least two test sub-circuits connected in parallel. Each test sub-circuit includes a resistive load unit, a first switching unit, and a second switching unit. The drive circuit can apply a drive signal to the control terminal of the DUT and, based on the conductivity direction of the DUT in the test sub-circuit, control the connection and disconnection states of the first, second, and third terminals of the first switching unit and the first, second, and third terminals of the second switching unit, thereby forming a power loop with the power supply, the resistive load unit, the first switching unit, and the DUT. This invention can effectively simulate real-world application scenarios for power devices, enabling unidirectional, bidirectional HTOL / LTOL, and DHTOL / DLTOL testing of power devices.

The utility model relates to a generator set current harmonic adaptability test device comprising a resistive load R1, switch cabinets S3-CB2, a current transformer TA1, a lightning arrester F1, a grounding knife switch PE2, isolation knife switches S3-CK2, a grounding knife switch PE1, switch cabinets S3-CB3, a current transformer TA2, a lightning arrester F2, a grounding knife switch PE3, and a high-voltage reactive harmonic source S3-SVG1 which are connected with a tested generator set in sequence to form a test loop. And an integrated control system. The generator set current harmonic adaptability test device solves the problem that the current harmonic adaptability test of a high-voltage large-capacity generator set cannot be met in a laboratory at present, and has the beneficial effects that adjustable harmonic current is output to a test loop through a high-voltage reactive harmonic source; the adaptive state of the high-voltage generator set to current harmonic waves during normal on-load work is detected, and meanwhile, effective overvoltage protection can be carried out on electric devices and test objects in a test loop.

Provided is a customer-sited hybrid generator system that coordinates a bidirectional inverter, an energy storage battery, an engine-driven generator, an optional renewable source, a controllable load bank, and an isolation switch under a supervisory controller, to supply facility loads and interact with a power grid. The controller enables multiple modes, including surge support during normal operation, under-frequency export from the battery with generator takeover, over-frequency import to charge the battery, and distributed curtailment using a resistive load thermally coupled to a liquid cooling loop. Electrically driven pumps and fans, a radiator, and a three-way valve route coolant among power electronics, engine, and curtailment loops. During a grid outage, the system may connect the generator directly to a facility bus, while isolating the inverter so the battery-backed inverter can provide parallel hybrid surge. The system interfaces with utility or VPP dispatch and supports either 50 Hz or 60 Hz interconnection.

A power supply system including a stack of fuel cells, a device for regulating the voltage at the poles of the stack which includes a resistive load connected between the poles of the stack for generating a voltage drop between them and a controlled switch inserted in series with the resistive load, which can be actuated between an open configuration and a closed configuration.

This invention discloses a display panel and a display device. The display panel includes a substrate and a crack detection structure disposed on the substrate. The substrate has a display area and a peripheral area surrounding the display area. The crack detection structure is located within the peripheral area and includes a detection line and at least two constant voltage signal lines. The detection line is located near the outer edge of the peripheral area and at least partially surrounds the display area. The constant voltage signal lines are located between the detection line and the display area. The detection line has a connecting terminal and an output terminal, and the connecting terminal is connected to at least two constant voltage signal lines. The display device includes the display panel. The detection line for PCD is disposed at the outer edge of the peripheral area, and the connecting terminal of the detection line is connected to at least two constant voltage signal lines, effectively reducing the resistive load of the detection line and avoiding a large voltage drop at the output terminal due to the resistance of the detection line itself, thus overcoming the problem of poor crack detection caused by a large voltage drop.