63 results about "Current clamp" patented technology

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.

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 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 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.

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 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.

The invention discloses a silicon adapter plate with a distributed ESD (Electro-Static Discharge) protection network and an ESD protection structure, which comprise an adapter plate body and the distributed ESD protection network, the distributed ESD protection network comprises an RC trigger MOS clamping unit layer and an embedded ESD diode network layer which are arranged at the upper end of the adapter plate body, a ground screen structure arranged at the lower end of the adapter plate body, and a TSV structure embedded in the adapter plate body; the TSV structure comprises a heat conduction TSV used for heat dissipation and a transmission TSV used for transmitting electric signals. The distributed ESD protection network is constructed in the silicon adapter plate, so that a cooperative mechanism of current clamping, current shunting and thermal diffusion is realized, the local electric field and temperature rise under an ESD event are remarkably reduced, the system-level anti-electrostatic breakdown capability and the long-term packaging reliability are improved, and the service life of the silicon adapter plate is prolonged. The method can be widely applied to high-bandwidth core particle interconnection, high-power radio frequency modules and heterogeneous integrated SoIC packaging.

The utility model discloses an electric energy quality analyzer easy to wire, which belongs to the technical field of electric power test equipment, and comprises an analyzer body, an alligator clip, a current clamp and a Rogowski coil, a plurality of sockets are arranged on one side of the analyzer body, a wiring assembly is arranged at the sockets, a plurality of groups of voltage test wires are arranged in the wiring assembly, and the voltage test wires are connected with the current clamp. A mounting groove is formed in the bottom of the analyzer body, and a magnet and a storage assembly are arranged in the mounting groove. According to the utility model, the wiring assembly and the voltage test wires are arranged, so that multiple groups of voltage test wires, the jacks and the storage assembly can be carried at the same time, the effect of convenient wire insertion and storage is realized, and when the voltage test wires are damaged, the corresponding voltage test wires can be dismounted and replaced; the alligator clip and the current clamp are fixed through the clamping part storage box, and the Rogowski coil is fixed through the coil storage box, so that disordered movement of the alligator clip, the current clamp and the Rogowski coil during carrying is avoided, and mutual winding of voltage test wires is avoided.

The application provides a test device and a test method, wherein the test device comprises a test load board and a start protection circuit arranged in the test load board, and the start protection circuit comprises: a current clamping circuit and a current regulating circuit which are connected; the current clamping circuit is used for clamping input current entering the test load board; and the current regulating circuit is used for controlling the clamped input current to gradually rise at a preset slope and output to a product to be tested. The application can be used for safe test power supply of the product to be tested.

The invention discloses an argmax in-memory computing system based on a memristor, which belongs to the technical field of integrated circuits, and comprises an n-row m-column 1T1R array, a WTA circuit and m one-step read-out and comparison modules, the one-step reading and comparing module comprises a voltage clamping circuit, an NMOS (N-channel Metal Oxide Semiconductor) current mirror and a PMOS (P-channel Metal Oxide Semiconductor) current mirror; in consideration of hardware limitation, when a binary number in a to-be-compared vector is smaller than or equal to a preset number, the to-be-compared vector is stored according to columns through a 1T1R array, column current is accurately read out through a reference voltage clamp, the column current is scaled in equal proportion through a current mirror, different column currents are compared in one step through a WTA circuit, and a comparison result is read out in one step rapidly and efficiently with low power consumption. Current clamping reading, scaling and comparison are integrated and completed in the same reading period, multi-period operation and intermediate data caching are avoided, the calculation efficiency is improved, the system delay is small, a complex peripheral circuit does not need to be introduced, and the power consumption overhead is low.

The invention discloses an intelligent electricity utilization inspection system and method based on cooperative measurement of a master machine and a slave machine, and relates to the technical field of electric power detection. The system comprises a host, a slave, a low-voltage current clamp and a flexible current clamp, the host is integrated with a microprocessor, a touch screen, a voice broadcast, a high-definition camera, a Beidou positioning module, a Bluetooth printing module, a security encryption chip and a one-key alarm module; the slave machine measures primary side current through the high-voltage pincerlike mutual inductor and is in wireless communication with the host machine. The method comprises the following steps: system self-inspection and equipment connection; the master machine and the slave machine wirelessly and synchronously measure a primary side signal and a secondary side signal; the host executes an intelligent algorithm, automatically judges a wiring mode and generates graphical data, a correction coefficient and an electric charge compensation result; carrying out field image evidence obtaining and bar code identification; generating a standardized report containing the electronic signature and printing the standardized report on site; according to the invention, the functions of measurement, diagnosis, evidence collection, calculation, signature and printing are integrated into a whole, the whole process of electricity utilization inspection from detection to issuing is intelligent and electronized, and the working efficiency, evidence effectiveness and field safety are remarkably improved.

An apparatus such as a clamp circuit includes a first circuit component and a second circuit component. The first circuit component may be coupled to a first circuit path. The second circuit component may be coupled to the first circuit component. The second circuit component may be configured to control operation of the first circuit component such that current received from the first circuit path passes through a combination of the first circuit component and the second circuit component to a ground reference voltage. In other words, controlled operation of the first circuit component results in sinking of the current received from the first circuit path through the first circuit component and the second circuit component to the reference voltage node such as ground. In one example, the first circuit component is controlled to sink the current through the clamp circuit when a supply voltage is below a threshold level.

The invention provides an intelligent visual detection system and method for a special light source switching power supply, and relates to the technical field of instrument detection. The system comprises a non-intrusive signal sensing layer, a data processing layer and an intelligent application layer. The sensing layer uses a high-frequency current clamp and a high-isolation voltage probe to collect electrical signals through electromagnetic induction and capacitive coupling on the premise of uninterruptible power supply; the data layer executes adaptive signal conditioning and digital processing; and the application layer performs health assessment, fault prediction and visual interaction based on a multi-parameter fusion algorithm and an aging model. The problems of potential safety hazards and low efficiency of traditional intrusive detection are solved, automation and predictive maintenance of power supply detection are achieved, and detection precision and safety are guaranteed.

The invention relates to a non-contact conductive unit and a performance testing method thereof, and relates to the field of high-frequency ultrasonic waves. According to the technical scheme, the soft magnetic composite material with the magnetic saturation strength larger than or equal to 1.2 T is adopted to replace traditional ferrite, the magnetic saturation performance is greatly improved, the problem that the energy transfer efficiency is low due to the fact that the magnetic saturation strength of the ferrite is smaller than or equal to 0.5 T is solved, the machining precision is high, and the defect that the machining precision of the ferrite is difficult to control is overcome; moreover, the non-contact conductive unit adopts a U-shaped opposite semi-closed structure, magnetic flux is limited in the magnetic core, magnetic field leakage is reduced to suppress electromagnetic interference, and meanwhile, the heat dissipation performance is improved in an approximately closed environment; besides, through the design of the size of the iron core, the number of turns of the winding and the sectional area of the wire, two testing methods of combination of an oscilloscope and a current clamp and a power analyzer are provided, the transmission power and efficiency can be accurately measured and calculated, and then performance optimization of the conductive unit can be continuously carried out subsequently.

A device includes an adaptive power limitation circuit configured to automatically determine active phases of a DCDC converter based upon power level of the DCDC converter. The adaptive power limitation circuit includes a translinear circuit configured to convert the power level of the DCDC converter to a current level and a clamping circuit, operatively connected to the translinear circuit, configured to clamp a maximum output current of the adaptive power limitation circuit to a predetermined value.

The utility model discloses a combined electricity inspection appearance, including the hinge articulation of box and box cover, is provided with the lock catch subassembly on the box and the box cover with the opposite side hinge, be provided with the fixed plate in the box, is provided with a plurality of placing groove on the fixed plate, and the high -pressure slave machine, the conversion head, the low -voltage slave machine, the host computer, the wired current clamp and the crocodile clamp are placed in the placing groove, be provided with the host computer controller in the host computer, and the host computer controller carries out wireless communication between high -pressure slave machine and low -voltage slave machine through wireless communication module respectively. The utility model will be concentrated in a box in multiple detection instrument, will be taken out from the box and be connected on the cable and carry out detection to detection instrument when detecting, and the host computer stores detection data in the detection process, after detecting, will detection instrument be put into the fixed plate in the box respectively in the corresponding placing groove, thereby guarantee that detection instrument will not shake in the process of carrying and transportation, avoid damaging detection instrument in the process of carrying.

The invention relates to the field of power electronic measurement technology and instruments, in particular to a current clamp with an automatic demagnetization function and an automatic demagnetization method thereof. The current clamp comprises a magnetic circuit unit, a current detection circuit, a residual magnetism detection and automatic trigger module, a PWM demagnetization circuit and a main control unit. A measuring coil and a demagnetizing coil are coaxially wound on an iron core of the magnetic circuit unit; a Hall sensor of the residual magnetism detection and automatic triggering module is embedded into a seam of the iron core and is used for monitoring an internal magnetic field of the iron core in real time; and the main control unit is configured to control the PWM degaussing circuit to generate a complementary PWM signal which changes according to an exponential decay rule based on the residual magnetism data or a preset trigger condition, insert a dead zone time when the signal is generated, and drive the H-bridge circuit and the degaussing coil to generate an alternating magnetic field to perform closed-loop degaussing on the iron core. According to the invention, the problem of low measurement precision of the current clamp caused by residual magnetism is effectively solved, and the current clamp has the advantages of fast and thorough demagnetization speed, low energy consumption, high integration level and the like.

The invention discloses an electrical stimulation system and a control method. The system comprises an electrode assembly, an impedance detection module, an electroencephalogram acquisition module, a local control module and an electrical stimulation output module. In the electrode assembly, the stimulating electrode and the electroencephalogram collecting electrode share the same electrode plate through time multiplexing; the impedance detection module selects a detection channel to input a test excitation signal, and synchronously acquires a response signal to estimate the electrode contact impedance; the local control module calculates a maximum safety current and a clamping target current based on the impedance parameter to obtain an actual execution current; the electroencephalogram acquisition module acquires electroencephalogram signals, and the local control module extracts electroencephalogram characteristics to adjust stimulation parameters; and the electrical stimulation output module outputs a stimulation signal. The system solves the problem that fixed parameters cannot adapt to individual impedance difference and dynamic fluctuation, avoids potential safety hazards such as overcurrent and overvoltage, ensures that the current density is safe and effective, and remarkably improves repeatability and consistency of the stimulation effect.

1. The name of the design product: wireless ammeter. 2. The use of the design product: used for clamping the measured object conductor and detecting the current flowing in the measured object conductor. 3. The design points of the design product: in shape. 4. The picture or photo that best shows the design points: perspective view.

The application relates to a wafer aging test circuit and system, which comprises a power module, at least one test module and at least one first protection module; any test module is connected with a corresponding to-be-tested power tube of a to-be-tested wafer; the power module comprises a high-voltage source and a low-voltage source; the high-voltage source is used for providing a test signal for the drain of any to-be-tested power tube, and the low-voltage source is used for providing a reference power supply for the gate of any to-be-tested power tube; the first protection module comprises a first normally-closed switching device and a first protection resistor; the drain of the first normally-closed switching device is connected with the source of the to-be-tested power tube; the source of the first normally-closed switching device is connected with the first end of the first protection resistor; the gate of the first normally-closed switching device is connected with the second end of the first protection resistor; and the second end of the first protection resistor is grounded. When the to-be-tested power tube is aged and broken down, the first normally-closed switching device can clamp the current in a set range, thereby effectively protecting the devices in the circuit.

The invention provides a wafer level device testing device. The device comprises a needle card which is used for accessing a tested device; the power supply is used for providing electric signals; the power supply protection module is electrically connected between the power supply and the pin card and is used for providing a drain electrode driving signal for the tested device based on the electric signal and stopping providing the drain electrode driving signal for the tested device when the tested device is broken down or short-circuited; the driving protection module is electrically connected between the power supply and the pin card and is used for providing a gate driving signal for the tested device based on the electric signal; the load module is electrically connected between the power supply protection module and the pin card and is used for accessing a load device; the current acquisition module is electrically connected between the needle card and the ground and is used for acquiring drain-source current; the clamping module is electrically connected with the needle card and is used for extracting a clamping drain-source voltage from the drain electrode driving signal; and the oscilloscope is electrically connected with the current acquisition module and the clamping module and is used for measuring the dynamic on-resistance through the drain-source current and the clamping drain-source voltage.

A parallel e-fuse device including: a first e-fuse to receive an input voltage and transfer a first fuse current to an output terminal; and a second e-fuse to receive the input voltage and transfer a second fuse current to the output terminal, the first e-fuse includes: a power transistor to control the first fuse current according to a gate voltage; a clamp amplifier to provide a charging current to charge a gate of the power transistor, the charging current being obtained by monitoring a feedback voltage; a balance amplifier to provide a first sinking current to discharge the gate of the power transistor, the first sinking current being obtained by comparing a current sensing signal with a current monitoring signal, wherein the clamp amplifier generates the charging current according to a differential voltage between the feedback voltage and a reference voltage.