132 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 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 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 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.

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 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 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.

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.

The utility model relates to a valve performance diagnosis wiring mechanism and a valve performance diagnosis device. The valve performance diagnosis wiring mechanism comprises a rack, a female plug, a male plug and a plurality of connecting wires, wherein the female plug is electrically connected with a to-be-tested electric head of a valve electric actuating mechanism; the male plug is electrically connected with a signal and power source of a driving control switch mechanism; the female plug is arranged on the rack; the male plug is arranged on the rack; the connecting line is detachably connected between the female plug and the male plug, and two ends of the connecting line are electrically connected with the pins on the female plug and the male plug respectively; and at least one through hole is formed in the rack, so that a current clamp of the valve diagnosis acquisition mechanism can clamp the connecting wire through the at least one through hole. According to the invention, the operation process of the valve diagnosis and detection operation can be simplified, and potential risks such as disconnection and connection errors possibly occurring in the operation process are avoided.

The utility model discloses a fatigue testing device for a rotary speed reducer, which comprises a notch square box, the rotary speed reducer is fixed on the side wall of the upper plane of the notch square box, a swing arm is connected onto an output shaft of the rotary speed reducer, and a balancing weight is hung at the other end of the swing arm. The rotary speed reducers with different sizes can be quickly mounted on the notch square box; the swing arm can be loaded through different mounting holes and can support the torque range of 400-8000 Nm; a hook-shaped opening of the balancing weight is convenient to mount and can be mounted and dismounted by a single person; data is wirelessly transmitted through an electric control box antenna, a lora module is inserted into a computer, upper computer software is opened, and the data is inquired; data are transmitted through the electric control box, real-time current, angle and operation times in the testing process can be accurately known, and compared with a traditional current clamp and counter point inspection mode, the working efficiency and accuracy are improved by 60%.

The utility model relates to the technical field of integrated circuits, and discloses a voltage-stabilizing integrated circuit in order to solve the technical problem that a voltage-stabilizing circuit is insufficient in precision and stability, the input end of the voltage-stabilizing integrated circuit is respectively connected with the emitting electrode of a triode Q6 and the emitting electrode of a triode Q8, the emitting electrode of the triode Q6 is connected with the base electrode of the triode Q8, and the base electrode of the triode Q8 is connected with the base electrode of the triode Q6. A power resistor R13 is connected between the collector of the triode Q8 and the collector of the triode Q6; a series voltage division circuit is arranged, an intermediate node is connected with an in-phase input end of an operational amplifier U11, and an output end of the operational amplifier U11 is connected with a base electrode of a triode Q6; the in-phase input end of the operational amplifier U4 is connected with the collector electrode of the triode Q6, and the inverted input end of the operational amplifier U4 and the collector electrode of the triode Q6 are connected with an adjustable resistor R16; and a clamping circuit is arranged between the output end of the operational amplifier U4 and the collector electrode of the triode Q6. The operational amplifier U4 and the adjustable resistor R16 accurately control the current, and the clamping circuit limits the voltage range, so that the stable output of the circuit under different load conditions is ensured.

The invention discloses an industrial robot actual energy consumption acquisition and control system based on a power meter, and belongs to the technical field of robot data acquisition and control. The problem that the real-time energy consumption of the robot in the actual working state cannot be accurately obtained in an existing mode is solved. A power meter, a voltage clamp and a current clamp are used for collecting original voltage and current data in the operation process of the industrial robot and uploading the original voltage and current data to an upper computer; after a data processing module in the upper computer performs filtering processing, a power calculation module performs integration on a power signal vector to obtain actual operation average power of the industrial robot; the motion control module uses a control program to control the industrial robot to move freely in a working space range through the industrial robot controller; the upper computer sends a motion instruction to the industrial robot controller through the communication module, and the industrial robot controller returns industrial robot joint information to the upper computer in real time.

The present invention discloses a device for confirming whether a secondary circuit is short-circuited correctly when a primary device is energized, comprising a host and a slave; the host comprises a first power supply module, a first clock timing module, a first storage module, a human-computer interaction module, a first communication module, a current transformer, a voltage acquisition module, a first current acquisition module, a first analog-to-digital conversion module, a relay, a relay control module, an isolation module and a first processor module; the slave comprises a second power supply module, a second clock timing module, a second storage module, a second communication module, an open current clamp, a second current acquisition module, a second analog-to-digital conversion module and a second processor module. The present invention improves the safety level of production, ensures the safety and reliability of secondary personnel when operating the running current circuit, and avoids personal and equipment accidents caused by misoperation. Improve the work efficiency of secondary maintenance personnel, and avoid spending a lot of time and effort on confirming the correctness of the current circuit.

The utility model discloses a double-pulse test platform capable of preventing connection wires from falling off, and particularly relates to the technical field of double-pulse test platforms, which comprises an experiment table and a plurality of current clamps, and is characterized in that the right part of the upper end of the experiment table is fixedly connected with a control cabinet body, and the left part of the upper end of the experiment table is fixedly connected with an external inductor body; a plurality of bearing plates are fixedly connected to the middle of the upper end of the external inductor body in a linear array distribution mode, the current clamps and the bearing plates are movably installed in a one-to-one correspondence mode, and a plurality of anti-disengaging assemblies are arranged in the middle of the upper end of the external inductor body in a linear array distribution mode. Reset assemblies are symmetrically arranged on the left portion and the right portion of the upper side of each bearing plate, and limiting assemblies and clamping assemblies are symmetrically arranged on the left side and the right side of each reset assembly. According to the double-pulse test platform capable of preventing the connection wire from falling off, the anti-falling assembly is arranged, and after the current clamp is inserted into the slot arranged in the anti-falling assembly, the plug part of the current clamp is pressed.

A current clamp, an electrical measurement device and a host system. The current clamp comprises a signal acquisition module, a signal conditioning module, a signal conversion module, a signal transmission module and a synchronization module. The signal acquisition module acquires a first current signal of a to-be-detected object and generates a second current signal according to the first current signal. The signal conditioning module generates an analog voltage signal according to the second current signal. The signal conversion module converts the analog voltage signal into a digital signal. A wired signal transmission module in the signal transmission module transmits the digital signal to a host of the current clamp in a wired manner. And a wireless signal transmission module in the signal transmission module wirelessly transmits the digital signal to a host. The host collects a first signal of a to-be-detected object. The synchronization module comprises a wired synchronization module and a wireless synchronization module. And the wired synchronization module and the wireless synchronization module are in communication connection with the host, so that the sampling time of the second current signal is synchronized with the sampling time of the first signal. The current clamp can stably transmit signal data.

The invention discloses a band-aid type temporary protection device and a use method thereof, and relates to the technical field of power system protection. The device comprises a temporary protection structure, a current sampling module and a voltage sampling module; the current sampling module and the voltage sampling module collect current and voltage signals through a non-intrusive open current clamp and a parallel voltage terminal respectively, the state of the circuit breaker is controlled by combining three-section over-current protection logic judgment of a processing module in the temporary protection structure, the protection function is ensured, and meanwhile, the current and voltage signals are collected through the non-intrusive open current clamp and the parallel voltage terminal. And the problems of complicated operation and high risk in the traditional method are thoroughly solved.