170 results about "Current clamp" patented technology

The invention relates to the technical field of battery production, in particular to a ternary lithium battery production quality detection method and device.The ternary lithium battery production quality detection device comprises a temperature control box, a fixing rod is fixedly connected to the inner side of the temperature control box, a detection mechanism used for battery current detection is installed on the outer side of the fixing rod, and the detection mechanism comprises a second C-shaped installation plate; the inner wall of the second C-shaped mounting plate is provided with a maintenance mechanism used for preventing spontaneous combustion of a battery, the inner wall of the second C-shaped mounting plate is fixedly connected with a first mounting plate, the front end of the first mounting plate is provided with two sets of symmetrical CCD cameras, and a servo motor drives a fixed rotating shaft and a gear transmission system; a second C-shaped mounting plate drives a direct-current clamp meter to rotate, meanwhile, a battery body rotates reversely through a synchronous belt and a gear structure, 360-degree surrounding scanning of the detection ring on the outer side of the battery is achieved, a second electric telescopic rod drives an arc-shaped cleaning plate to be attached to a pole, an oxide layer is automatically removed, and contact resistance increase caused by impurities is avoided.

The utility model relates to a power supply device and a testing machine, the power supply device comprises a main loop, a voltage loop, a current loop and a clamping circuit, in a pressurization mode, when a detection current output by the clamping circuit at the current loop is in a set current clamping range, the output impedance is high resistance; and when the detection current output by the current loop is not in a set current clamping range, the clamping circuit triggers the clamping current to carry out analog output, and the output impedance is switched to low resistance, so that the output of the main loop is equivalent to a constant current source. In the current adding mode, when the detection voltage output by the clamping circuit at the voltage loop is within a set voltage clamping range, the output impedance is high resistance; and when the detection voltage output by the voltage loop is not in a set voltage clamping range, the clamping circuit triggers the clamping voltage to perform analog output, and the output impedance is switched to low resistance, so that the output of the main loop is equivalent to a constant voltage source. The simulation regulation function is achieved, and the response speed is high.

The invention discloses a power distribution network overhead line single-phase earth fault positioning device and method based on an unmanned aerial vehicle, and belongs to the field of power distribution network unmanned aerial vehicle inspection. Comprising a power supply, an unmanned aerial vehicle and a terminal, and a measuring device and a signal transmission device are assembled on the unmanned aerial vehicle. The power supply is used for outputting a current signal of which the frequency is different from the power frequency to an overhead line, the measuring device is used for detecting a magnetic field signal near the line, the signal transmission device comprises a wireless transmitting module for transmitting magnetic field data back to a ground end and a terminal for receiving the data, and the terminal is used for processing and displaying the transmitted data. According to the invention, the mode of the unmanned aerial vehicle-mounted magnetic field sensor is adopted to replace the hanging line measurement of a traditional clamp current meter, remote non-contact measurement can be realized, the efficiency and safety of fault inspection can be improved, and the adopted high-precision micro-magnetic detection sensor can ensure the measurement precision.

The invention provides an aviation transient electromagnetic constant-amplitude in-phase parallel transmitter system, and the system comprises a power management unit which is used for supplying power; the full-bridge inverter circuit unit comprises a plurality of MOSFET full-bridge inverter modules which are arranged in parallel, each MOSFET full-bridge inverter module sends out a constant-amplitude in-phase bipolar parallel current pulse to a transmitting load connected with the MOSFET full-bridge inverter module, so that each transmitting load generates a constant-amplitude in-phase electromagnetic field, and the constant-amplitude in-phase electromagnetic fields are superposed and jointly act on a to-be-detected target; the active self-adaptive voltage-adjustable double-clamping unit is connected with the full-bridge inverter circuit unit and is used for clamping the rising edge and the falling edge of each sub-pulse in the equal-amplitude in-phase bipolar parallel current pulse; the control unit is used for generating a PWM (Pulse Width Modulation) sequential logic control signal to control the full-bridge inverter circuit unit, so that each MOSFET (Metal-Oxide-Semiconductor Field Effect Transistor) full-bridge inverter module outputs a constant-amplitude in-phase bipolar parallel current pulse; and the detection unit is used for detecting the emission current, the clamping current and the clamping voltage respectively and feeding back detection results to the control unit.

The invention provides a microgravity metal fuse wire additive melt directional transfer and liquid bridge transition maintaining device and method. A forming substrate is installed on a multi-axis motion platform; the multi-axis motion platform customizes a three-dimensional motion track path according to three-dimensional data in additive manufacturing; the two current clamps are respectively fixed between the metal wire and the forming substrate, a current path is formed between the metal wire and the forming substrate through a direct-current power supply, and an ampere meter is connected in series in the current path; the electromagnetic coil is arranged in the circumferential direction of the metal wire, and the magnetic conductive bars are connected with the electromagnetic coil and distributed at the symmetrical positions of the two sides of the end of the metal wire. The AC power supply provides an alternating electric field for the electromagnetic coil; the wire feeding mechanism and the driving motor feed the metal wire to the action range of the light spot emitted by the laser source quantitatively at a constant speed; the laser acts on the forming substrate, and a liquid molten pool is formed on the forming substrate; the metal wire and the forming substrate form a liquid bridge connection mode through the liquid melt. The air hole defect of the component can be reduced.

The invention provides a current detection probe, which comprises a current clamp and a detection cable, and is characterized in that the detection cable is electrically connected to the current clamp; the detection cable comprises a protective layer, an insulating layer, a probe magnetic core and an inner conductor, the inner conductor is embedded in the probe magnetic core, the insulating layer wraps the probe magnetic core, and the protective layer wraps the insulating layer and the current clamp. The current clamp solves the technical problems that a traditional current clamp causes electromagnetic leakage due to wire exposure and cannot accurately complete detection work due to external interference.

The invention provides a calibration system and method for a fluxgate current sensor, the system comprises a power supply module, a test tool module and a current clamp clamped on the input hole wall of the fluxgate current sensor, the power supply module is connected with the test tool module, and the test tool module is connected with the current clamp; the test tool module comprises a control circuit, a current source circuit, a multipath controller circuit and an interface circuit, the control circuit is respectively connected with the current source circuit and the multipath controller circuit, and the current source circuit is connected with the current clamp through a calibration interface in the interface circuit; and the multi-path controller circuit is used for being connected with a fluxgate current sensor through a sensor communication interface in the interface circuit. According to the invention, the problems of easy overload of power supply, high current source cost of large current and high precision and the like of the vehicle-mounted fluxgate current sensor in test calibration due to the characteristics (such as small internal resistance of a magnetic probe coil and large starting current) are solved.

The invention relates to the field of automatic control systems, in particular to a dynamic anti-collision control method for motion of a multi-axis tool, which comprises the following steps of: respectively setting a target moving distance and a safety distance for each clamp, and generating a motion sequence containing all the clamps; clamps are sequentially obtained from the motion sequence to serve as current clamps; and measuring the distance between the adjacent clamps for the current clamp, and judging whether the distance between the adjacent clamps accords with the safe distance or not until all the clamps are moved. In order to solve the problem of interference between moving shafts of a multi-shaft tool in the prior art, a safety distance and a target moving distance configured between bent frames or between clamps are introduced. In the moving process, multi-direction spacing detection is conducted on the bent frames or the clamps in the moving sequence in sequence, whether the moving condition meets the safety spacing or not is judged, spacing judgment is conducted in sequence in a recursive mode, and the bent frames or the clamps move in the direction until the bent frames or the clamps meet the set spacing requirement. And finally, all the clamps are safely moved to target positions.

The invention belongs to the technical field of avionics detection, and particularly provides a rapid fault detection system and method for an avionics equipment transmitter, and the system comprises an electronic equipment detection system, an auxiliary device, an oscilloscope, a frequency spectrograph, a digital multimeter, a high-voltage probe and a current clamp which are connected through a cable. And a ground wire of the auxiliary device is connected with the avionics equipment. According to the invention, fault detection and positioning of components can be carried out by means of a complete machine to which the transmitter belongs without splitting a product to be tested, particularly, fault components are determined under the condition that the high voltage is applied to the transmitter, after various instructions, excitation signals and power supply troubleshooting confirmation are carried out, various functional loops are detected on line, and a special klystron is designed to replace a load. And finally, one-time fault positioning is realized, so that the fault positioning efficiency of the product is improved, and continuous power-on startup verification is reduced.

The invention provides an error amplifier for peak current mode control and a converter system. The error amplifier comprises a transconductance amplifier, a voltage clamping module, a voltage-current converter, a slope compensation module, a current clamping module and a mirror image tube, the negative end of the transconductance amplifier is used for loading feedback voltage, and the positive end is used for loading reference voltage; the output end of the transconductance amplifier, the output end of the voltage clamping module and the input end of the voltage-current converter are electrically connected; the voltage-current converter generates error current; the slope compensation module is used for performing slope compensation on the error current to generate a compensated current; the output end of the slope compensation module, the output end of the current clamping module and the positive end of the high-side comparator are electrically connected with a second reference node; and the mirror image tube is used for loading the comparison voltage to the positive end of the high-side comparator. The error amplifier provided by the invention can realize more stable mode switching and more accurate current limiting control.

The invention discloses a function test system, a function test method and a diagnosis device, and the system comprises a current clamp device which comprises a current clamp which is used for being connected with a storage battery and a to-be-tested electric appliance on a truck when the function test is carried out on the truck; the measuring module is connected with the current clamp, and the measuring module is used for detecting the working current of the to-be-detected electric appliance after the to-be-detected electric appliance is started; the communication module is electrically connected with the measurement module; and the diagnosis equipment is electrically connected with the truck, the diagnosis equipment is in communication connection with the communication module, and the diagnosis equipment is used for working according to the work provided by the communication module. Through the function test system, all electric appliances needing to be tested on the truck can be automatically detected, manpower and time can be saved, the detection reliability can be ensured, and the safety of the truck is improved.

A driver system comprising a bridge driver section, a switch FET section comprising: a drive stage section, a device section, and a current limiting section, wherein the switch FET section electrically couples the bridge driver section to the device section, wherein the fast current clamp is electrically coupled to the device section. By using the drive-bridge configuration, the gate capacitance of the switch FET can be charged and discharged quickly enough to meet the edge rate requirements. The switch FET is driven into and out of saturation such that the current through the device section is either on or off.

The invention discloses a speed-limiting constant-power control method of a direct-current brushless motor, which is based on an existing motor vector control system and comprises the following steps of: firstly, determining a Q-axis target current Iqspd required for reaching the highest speed limit by taking the highest speed limit as a target value of constant-speed PI (Proportional Integral) control; and then the Q-axis target current Iqref is clamped below the constant-rotating-speed Q-axis target current Iqspd so as to ensure that the motor operates at the speed lower than the highest rotating speed. According to the invention, the constant power control module and the constant speed module in the FOC control logic are multiplexed, and low-cost realization of the technology is realized. And on the other hand, the method is high in control bandwidth and accurate in actual speed limit.

The invention discloses a multi-point grounding conduction tester and a detection method thereof, a current clamp meter is independently arranged, shunt current of each grounding point of multi-point grounding equipment can be independently detected, detection failure caused by poor grounding of the grounding points of the multi-point grounding equipment is avoided, and the multi-point grounding conduction tester and the detection method thereof are suitable for detection of the multi-point grounding equipment. And meanwhile, the detection current between the two points can be corrected by calculating the shunt coefficient, so that the accuracy of the calculation result of the on-resistance is improved, and the grounding effect is better evaluated.

The utility model relates to a current clamp and clamp type current monitoring equipment, and belongs to the technical field of current monitoring. The utility model provides a current clamp which comprises a shell, two clamp bodies and a linkage assembly, each clamp body comprises a driving section and a clamping section which are connected, the driving sections of the two clamp bodies are rotationally connected with the shell so that the two clamp bodies can be in an open state and a closed state, the clamping sections are in an arc shape, and when the two clamp bodies are in the closed state, the two clamp bodies can be driven by the linkage assembly. The two clamping sections abut against each other and enclose to form a closed clamping ring; the linkage assembly comprises a pushing piece arranged between the two clamp bodies, and the pushing piece is at least connected with one clamp body so as to drive the other clamp body to rotate reversely when one clamp body rotates at least in the process that the two clamp bodies are converted from the closed state to the open state. The current clamp and the clamp type current monitoring device at least solve the problem that in the prior art, the action stroke of the current clamp is long in the opening and closing process.

1. Name of the designed product: wireless ammeter. 2. Use of the designed product: belongs to the field of electric power measurement, used for measuring current. 3. Design points of the designed product: in the overall shape of the product. 4. Picture or photo that best indicates the design points: design 1 perspective view. 5. Design 1 is designated as the basic design.

The utility model provides a translation device, relates to medical instrument production technical field, including platform, clamp part, carrying mechanism and moving mechanism, carrying mechanism includes lifting part and locating part, lifting part drives locating part to carry out lifting motion, moving mechanism drive lifting part drives locating part to move along the length direction of platform, and the lifting part drives the locating part to move along the length direction of platform. The multiple clamp parts are arranged on the platform in the length direction of the platform, each clamp part is provided with a motion space for the corresponding positioning part to do lifting motion, and the clamp parts correspond to the positioning parts. The lifting part drives the positioning part to move upwards, the product body is jacked up from the current clamp part, then the moving mechanism drives the lifting part to drive the positioning part and the product body to move to the target clamp part, and the lifting part drives the positioning part to move downwards to place the product body into the target clamp part. And automatic carrying and moving of the product body are achieved, and then the operation efficiency of the assembling procedure is improved.

The invention discloses a dual-active-bridge converter for low voltage and high power and a control method thereof, and belongs to the technical field of dual-active-bridge converters, and the dual-active-bridge converter comprises a low-voltage full-bridge switch, a high-voltage full-bridge switch, a high-frequency transformer, a boost inductor LBoost, an external series inductor Lseries, a low-rated-current clamping diode Dclamp1 and a low-rated-current clamping diode Dclamp2. The power supply is connected in parallel with the filter capacitor CLV; the filter capacitor CLV is connected in series with the boost inductor LBoost, and the other end of the boost inductor LBoost is connected with a common node of the low-voltage full-bridge switch; the secondary side of the high-frequency transformer is led out through a center tap, the upper portion and the lower portion of the high-frequency transformer are connected with a low-rated-current clamping diode Dclamp1 and a low-rated-current clamping diode Dclamp2 respectively, and meanwhile one end of the secondary side of the high-frequency transformer is connected with an external series inductor Lseries and then connected with the high-voltage full-bridge switch. The dual phase shift modulation (DPSM) can improve the performance of the converter under light load, and has the advantages of few components, simple circuit and the like.

Described are light emitting diode (LED) and non-LED driver systems and methods that reduce current overshoot and, deadtime, and other undesirable effects in applications such as adaptive driving beam headlamp application that negatively impact circuit parameters, including efficiency. In certain embodiments, this is accomplished by using a current clamp circuit that is controlled such as to limit an overshoot in load current, e.g., when a number of LEDs that are turned on changes.

The invention relates to a plant station secondary ground screen grounding and mutual inductor secondary circuit insulation state detection device, which comprises a main control circuit, a signal generation circuit, a signal detection circuit, a power supply and a multi-stage voltage conversion circuit, the signal generation circuit is electrically connected with a ground wire of an external secondary ground grid, and the signal generation circuit directly injects a specific signal into a joint of two ends of the ground wire of the secondary ground grid in a physical connection mode; in a mutual inductance mode, alternating current signals with specific frequency are mutually inducted to a loop formed by a secondary ground screen, a ground wire, a secondary cable shielding layer and the like through a current clamp; and the signal detection circuit judges whether the secondary ground grid is reliably grounded and whether the secondary loop is in an insulation state or not by respectively detecting grounding wire current signals of the secondary ground grid and the mutual inductor loop. According to the technical scheme, reliability detection and maintenance of the grounding grid and the grounding point in the station are achieved, normal operation of primary and secondary equipment is guaranteed, and reliable operation is protected.

This invention discloses an in-memory argmax calculation system based on memristors, belonging to the field of integrated circuit technology. It includes an n x m 1T1R array, a WTA circuit, and m one-step readout and comparison modules. Each one-step readout and comparison module includes a voltage clamping circuit, an NMOS current mirror, and a PMOS current mirror. Considering hardware limitations, when the binary number in the vector to be compared is less than or equal to a preset number, the vector to be compared is stored column-wise by the 1T1R array. The reference voltage clamp accurately reads the column current, the current mirror scales the column current proportionally, and the WTA circuit compares different column currents in one step, enabling fast, efficient, and low-power one-step readout of the comparison result. This invention integrates current clamping readout, scaling, and comparison within the same readout cycle, avoiding multi-cycle operations and intermediate data buffering, improving computational efficiency, reducing system latency, and eliminating the need for complex external circuits, resulting in low power consumption.

This invention relates to a power meter-based system for collecting and controlling the actual energy consumption of an industrial robot, belonging to the field of robot data acquisition and control technology. It solves the problem that existing methods cannot accurately obtain real-time energy consumption data during the robot's actual working state. The invention uses a power meter, voltage clamp, and current clamp to collect raw voltage and current data during the industrial robot's operation and uploads it to a host computer. The data processing module in the host computer performs filtering processing, and the power calculation module integrates the power signal vector to obtain the average power of the industrial robot during actual operation. The motion control module uses a control program to manipulate the industrial robot's free movement within its workspace through the industrial robot controller. The host computer sends motion commands to the industrial robot controller via a communication module, and the industrial robot controller returns joint information of the industrial robot to the host computer in real time.

The invention provides a welding power source system and method for achieving high-frequency editable pulse current output, and belongs to the field of welding power sources, the welding power source system comprises a TIG welding gun, an oscilloscope and a gas protection device, the TIG welding gun is connected with a high-frequency waveform editing module, the high-frequency waveform editing module is connected with an inductor and an FPGA control panel, the inductor is connected with a multi-output constant current source, and the multi-output constant current source is connected with the oscilloscope. The oscilloscope is connected with the TIG welding gun through a current clamp, and the gas protection device is connected with the TIG welding gun through a gas pipe. According to the welding power supply system and method for achieving high-frequency editable pulse current output, the high-frequency waveform editing module formed by sampling three paths of switching circuits in parallel can provide more waveform selections and more accurate current output on the premise of maintaining stable combustion of an electric arc; a special switch time sequence is matched with synchronous rectification, so that circuit heating can be reduced, the accuracy of current waveforms is improved, heat input can be accurately controlled, arc energy gradient distribution is optimized, and the welding seam quality is improved.

The utility model discloses a kind of amorphous alloy three-dimensional roll iron core annealing monitoring models, comprising: support, amorphous alloy three-dimensional roll iron core, high voltage coil, low voltage coil, insulating iron hoop, ac frequency modulation power supply, magnetized busbar and power analyzer, high voltage coil and low voltage coil are set in the upper yoke portion of amorphous alloy three-dimensional roll iron core;Insulating iron hoop is used to fix amorphous alloy three-dimensional roll iron core;Magnetized busbar is supported by insulating support plate and placed in the inner frame of the iron core;Ac frequency modulation power supply is electrically connected with high voltage coil;Voltage clamp and current clamp are electrically connected with low voltage coil respectively;Power analyzer is electrically connected with the voltage clamp and current clamp.

This invention provides an intelligent visual detection system and method for special light source switching power supplies, belonging to the field of instrument testing technology. The system includes a non-invasive signal sensing layer, a data processing layer, and an intelligent application layer. The sensing layer utilizes a high-frequency current clamp and a high-isolation voltage probe to acquire electrical signals through electromagnetic induction and capacitive coupling without interrupting power. The data layer performs adaptive signal conditioning and digital processing. The application layer, based on a multi-parameter fusion algorithm and aging model, performs health assessment, fault prediction, and visual interaction. This invention overcomes the safety hazards and low efficiency of traditional invasive detection methods, achieving automated and predictive maintenance of power supply detection, and ensuring detection accuracy and safety.

The invention discloses reliability detection equipment for precision instrument research and development, and belongs to the technical field of high and low voltage CT transformation ratio tester detection. The reliability detection equipment comprises a detection table, and the bottom of the detection table is provided with a current clamp installation mechanism and an induced current generation detection mechanism; the current clamp is installed on a to-be-detected part of the detection table, and the clamp-shaped part of the current clamp is used for detecting the induction current. The integrated current clamp detection device is arranged, automatic judgment of the detection process is achieved through the induction current generation detection mechanism, the current clamps meeting the standard enter the subsequent detection link, and if the current clamps are unqualified, the rejection mechanism is triggered to inform an operator to conduct fixed-point disassembly; the time-varying magnetic field environment of the actual working condition of the cable is dynamically simulated through the multi-axis adjustable arc-shaped magnet array, an alternating magnetic field interference model meeting the electromagnetic compatibility test requirement is constructed, the CT transformation ratio measurement precision of the current clamp in the complex electromagnetic environment is effectively improved, and the test uncertainty is reduced.

The invention discloses a resonant power electronic transformer based on current clamping and an operation control method thereof, the input voltage of the resonant power electronic transformer is Ui, the output voltage of the resonant power electronic transformer is Uo, and the topology comprises an inversion unit, a transformer, a resonant capacitor Cr, a rectification unit and an output inductor Lo; according to an instruction of an external controller, the inversion unit periodically inputs positive, zero and negative levels to the primary side of the transformer, the output inductor is utilized to apply a clamping effect on the resonant current, and the resonant capacitor is utilized to realize zero-current turn-off of the inversion unit. The resonant current is approximate to a trapezoidal wave, the peak value and the effective value of the current are obviously reduced under the same power, and the device has the advantages of small current stress and small conduction loss; zero-current turn-off of all switching tubes of the inverter unit is realized, and the advantage of low switching loss is achieved; the problems of high current stress and high conduction loss caused by sine wave resonance current of an existing resonance type power electronic transformer are solved.

The application relates to the technical field of current detection, and particularly discloses a high-frequency AC / DC current probe, which comprises a current clamp body, the current clamp body has a clamping jaw structure which can be opened and closed and forms a detection channel for accommodating a cable; at least three positioning ropes are further arranged, the positioning ropes are distributed in the circumferential direction of the detection channel and form a positioning hole for accommodating the cable; one end of each of the positioning ropes is hinged to one side of the current clamp body, and the other end is connected with a winding shaft, the winding shaft is rotationally arranged on the current clamp body, and an elastic reset structure is arranged on the winding shaft and used for applying a tightening force to the positioning rope; by adopting the positioning ropes, self-adaptive center positioning of cables with different outer diameter specifications is realized, the structure can provide multi-directional balanced radial contraction force, automatically eliminates the length of the excess rope body, and stably restrains the cable in the center of the detection channel.

Current clamp monitoring systems are disclosed, and include a current clamp connector connectable to a current clamp, the current clamp connector being configured to power the current clamp and measure a voltage at an output interface of the current clamp corresponding to a current along a power line extending between a battery bank and a load, the power line extending through an aperture of the current clamp. A power connector is connectable to a battery bank to draw power from the battery bank to power the current clamp monitoring system.

This invention relates to the field of circuit breaker life prediction technology, specifically disclosing a method and system for predicting the mechanical life of a 10kV pole-mounted circuit breaker. The method includes acquiring multi-dimensional operating status signals of the circuit breaker, including the operating mechanism coil current sequence and main circuit phase current sequence acquired by Hall current clamp, as well as synchronously acquired operating bus voltage and ambient temperature. In practical power distribution network operation and maintenance applications, this invention effectively reduces the interference caused by harsh outdoor environments and power fluctuations on feature extraction by synchronously acquiring operating bus voltage and ambient temperature to perform benchmark calculations of initial mechanical degradation parameters, thus ensuring the objectivity and authenticity of the input model data.