41results about "Electronic protection circuit testing" patented technology

A probe card includes a plurality of power lines that are electrically connected to the plurality of DUTs, a plurality of ground lines that are electrically connected to the plurality of DUTs and to each other, and a plurality of power compensation circuits that are electrically connected to respective ones of the plurality of power lines and respective ones of the plurality of ground lines, where the plurality of power compensation circuits are configured to generate and provide a plurality of compensated power supply voltages to the respective ones of the plurality of power lines, and where the plurality of compensated power supply voltages are configured to inhibit a variation of a ground voltage of the respective ones of the plurality of ground lines.

A method for probing a circuit breaker electrically connected to an electric line is described. The method comprises injecting one or more first signals at a first point of said electric line, wherein said one or more first signals have frequency content at least partially included in a predefined frequency range. The method further comprises detecting one or more second signals at a second point of said electric line, wherein said one or more second signals are detected with a detection frequency band calculated based on said frequency range. The method further comprises calculating a frequency response function indicative of a frequency response of said electric line in said frequency range based on the detected one or more second signals.

Example devices and methods for compensating for monitoring a surge protection device are provided. In some embodiments, a device is configured to couple to a surge protection device. The device comprises a processor that is capable of sending a DC current signal. A serial data interface is electrically connected to the processor and includes at least one shift register. The device also comprises a multiplexer coupled to the serial data interface. The serial data interface is operable to direct the DC current through the multiplexer. The device also comprises an analog to digital converter (optionally embedded within the processor) that is operable to output a digital signal corresponding to a voltage induced by the DC current signal. Returned DC signals represent surge protection device's health and a multitude of other surge module information.

The present disclosure relates to a battery protection circuit module to which an authentication circuit unit (410; 420) is applied and a method of protecting an authentication circuit unit (410; 420) using the same, and more particularly, to a battery protection circuit module including a part arrangement design that is robust against external environment noise and a method of protecting an authentication circuit unit (410; 420) using the same. A battery protection circuit module to which an authentication circuit unit (410; 420) is applied may include an authentication circuit unit (410; 420) connected to an output stage of the battery protection circuit module and a protection device configured to protect the authentication circuit unit (410; 420) against external noise.

The present invention relates to a method for probing a circuit breaker electrically connected between a first line section and a second line section of an electric line. The method comprises the following steps: - a first step of injecting one or more first signals at a first point of said electric line, wherein said one or more first signals have frequency content at least partially included in a predefined frequency range; - a second step of detecting one or more second signals at a second point of said electric line, wherein said one or more second signals are detected with a detection frequency band calculated based on said frequency range; - a third step of calculating a frequency response function of said electric line in said frequency range based on the detected one or more second signals.

The invention relates to an automatic tool test circuit and test method based on a super capacitor. The automatic tool test circuit comprises a control unit, a switch S3, a super capacitor C16, a resistor R57, a current-limiting resistor R35, a resistor R56 and a to-be-tested module. The control unit is used for controlling on and off of the switch S3; the positive electrode of the super capacitor C16 is sequentially connected with a resistor R57, a switch S3 and a resistor R56 in series, and the negative electrode of the super capacitor C16 is grounded; the module to be tested comprises a sampling resistor R34 used for detecting an overcurrent and generating a voltage difference; the first end of the sampling resistor R34 is connected with the second end of the resistor R56, and the second end of the sampling resistor R34 is grounded; the super capacitor C16 is used for storing electric energy and providing current at the moment of discharging, the super capacitor C16 discharges at the moment of closing of the switch S3, and instantaneous current is generated on the sampling resistor R34. The method is low in cost, safe, reliable and easy to implement in factory flow line production, and remarkable competitive advantages are provided for enterprises.

The invention relates to an electrical network (1), wherein the electrical network (1) has at least one EMC filter (2), wherein the EMC filter (2) is associated with a monitoring circuit (3), wherein the monitoring circuit (3) has at least one coupling circuit (4), at least one rectifier circuit (5) and at least one evaluation circuit (7), wherein the at least one coupling circuit (4) is arranged at an output of the EMC filter (2), wherein the at least one evaluation circuit (7) is configured to determine the functionality of the EMC filter (2) depending on at least one output signal of the rectifier circuit (5).

Embodiments of the present specification relate to a circuit breaker control device, a circuit breaker, and a circuit breaker test system, in which: communication is performed with a test device in a data communication manner so as to receive, from the test device, data on information of a test signal for testing a blocking operation of the circuit breaker; a relay element of the test signal is analyzed on the basis of the data; and whether to perform the blocking operation is determined according to an analysis result, and the blocking operation is thus performed according to a determination result.

The invention discloses a surge protection device board-level function on-line test method, particularly relates to the technical field of electric measurement and power electronic protection, and is used for solving the problem that fine on-line evaluation on the real protection capability and the degradation state of a plurality of surge protection devices on a circuit board is difficult under the condition that equipment is not stopped and the board is not disassembled. A node topology model and baseline equivalent parameters of a circuit board bus, a load and each surge protection device are established, a fluctuation-controlled online test window is selected during operation, controlled micro-surge excitation is applied to a target node, and a state index of each surge protection device is solved by combining multiple rounds of combined tests on the basis of multi-node synchronous acquisition; therefore, the real protection capability of a plurality of surge protectors on the board is subjected to refined online evaluation under the conditions of no shutdown and no board disassembly, degenerated but incompletely invalid devices are identified in time, and the surge protection margin of the credible circuit board is given.

A surge protection device is mounted on a transmitter. A cable that sends a signal received from an external device is connected to terminal block screw portions. The connector is detachable with respect to a connector component provided in the transmitter, and outputs an input signal received from each of the terminal block screw portions to the connector component. The surge protection element absorbs a surge electric current in a case where a surge voltage is applied from the terminal block screw portions to the connector component. The terminal connector portion is connected to the terminal block screw portions via the surge protection element.

The present invention relates to a method for probing a circuit breaker electrically connected to an electric line. The probing method comprises the following steps: - injecting (101) a first signal (S1(t)) at a first point (A) of said electric line, wherein said first signal has a predefined frequency content and a predefined frequency band and is injected during an injection time interval (TJ) having a predefined time duration; - detecting (102) a second signal (S2(t)) at a second point (B) of said electric line, wherein said second signal is detected during a detection time interval (TD) including at least partially said injection time interval (TJ); - processing (103) a first portion of said second signal (S2(t)), which refers to a first portion (TJ) of said detection time interval (TD), during which said first signal (S1(t)) is injected, to calculate a first signal value (GJR) indicative of the signal power of said second signal (S2(t)) in the frequency band of said first signal S1(t), during the first portion (TJ) of said detection time interval (TD); - processing (104) a second portion of said second signal (S2(t)), which refers to a second portion (TN) of said detection time interval (TD), during which said first signal (S1(t)) is not injected, to calculate a second signal value (GN) indicative of the signal power of said second signal (S2(t)) in the frequency band of said first signal S1(t), during the second portion (TN) of said detection time interval (TD).

A vehicle assembly associated with a ground assembly as a part of a wireless power transfer system for electric vehicles having a built-in test circuitry for testing a protection mechanism against overvoltage at a vehicle assembly is provided herein. The vehicle assembly may include: circuitry for testing a protection mechanism against an overvoltage event comprising a controlled switch to divert current off the output of the vehicle assembly, into a bypass circuitry, upon detection of the overvoltage event across the output of the vehicle assembly, said circuitry for testing comprising: a voltage or current source configured to apply an electrical charge into a gate of the controlled switch at a level which is sufficient to turn the controlled switch on, so as to verify that the controlled switch and the bypass circuitry serve as a shortcut of the output of the vehicle assembly.

This invention discloses a detection circuit, a protection circuit, a motor drive circuit, a circuit board, and an air conditioner. The detection circuit uses a first diode and a second diode with their anodes connected to each other. The sampling signal input terminal is connected to the cathode of the first diode, and the detection module is connected to the cathode of the second diode. The first diode and the second diode can produce a mirror effect, so that the voltage value of the target voltage signal input from the sampling signal input terminal is consistent with the voltage value input to the detection module. This avoids the voltage drop of the diode from affecting the voltage value input to the detection module, thereby improving the accuracy of overcurrent detection.

The present invention relates to a protection device (1 ) for controlling a power supply circuit (7) for powering a heating arrangement (5) belonging to a heatable clothing garment (3), where the protection device (1 ), first power supply circuit (7), and clothing garment (3) are adapted to be submerged in a body of water (15) with its user (2). The protection device (1 ) is adapted to detect a leaked electric current (4) from the heating arrangement (5) into the body of a user (2) of the clothing garment (3). The protection device (1 ) comprises a controller (10) adapted to adjust the power supply circuit (7) upon receiving an output signal (9) indicating a leaked current (4), and a self-test device (13) configured to verify the functionality of the protection device, where the galvanic contact between a testing electrode (14) and the body of the user (2) goes through the body of water (15).

The present disclosure relates to a battery protection circuit module to which an authentication circuit unit is applied and a method of protecting an authentication circuit unit using the same, and more particularly, to a battery protection circuit module including a part arrangement design that is robust against external environment noise and a method of protecting an authentication circuit unit using the same. A battery protection circuit module to which an authentication circuit unit is applied may include an authentication circuit unit connected to an output stage of the battery protection circuit module and a protection device configured to protect the authentication circuit unit against external noise.

An active current compensation device is provided that actively compensates for noise input in common mode onto two or more large current paths connected to a power system. [Solution] The present invention provides an active current compensation device 100 that actively compensates for noise generated in common mode in at least two or more large current paths 111, 112, and includes a sensing unit 120 that generates an output signal corresponding to the common mode noise current in the large current path, an amplifier unit 130 that amplifies the output signal to generate an amplified current, a compensation unit 160 that generates a compensation current based on the amplified current and can flow the compensation current in each of the at least two or more large current paths, and a malfunction detection unit 180 that detects malfunction of the amplifier unit, and at least a part of the amplifier unit 130 and the malfunction detection unit 180 are built into a single integrated circuit (IC) chip 500.

The invention discloses a secondary equipment hidden danger detection method and system based on multistage collaboration, and the method comprises the steps: collecting the multi-source data of a system in real time, and aligning the timestamps of the multi-source data; in a non-fault period, carrying out device hidden danger detection on the secondary equipment; when an external fault is detected, determining a device for carrying out spacer layer hidden danger detection based on a device hidden danger detection result of the secondary equipment; starting the protection device during an external fault period, and carrying out spacing layer hidden danger detection on the determined device according to the voltage and current phase difference of a non-fault phase to determine whether the protection device has a multi-point grounding fault or not; when it is determined that the multi-point grounding fault exists in the protection device, whether a common grounding neutral point wiring multi-point grounding fault exists in the voltage transformer or not is detected, and the phase, where the multi-point grounding fault exists, of the current transformer is positioned; early identification, accurate positioning and automatic alarm of hidden dangers such as PT / CT two-point grounding, sampling imbalance and double-sleeve protection inconsistency are realized.

A method for probing a circuit breaker electrically connected to an electric line is described. The probing method comprises injecting a first signal at a first point of said electric line. The probing method further comprises detecting a second signal at a second point of said electric line. The probing method further comprises processing a first portion of said second signal, to calculate a first signal value indicative of the signal power of said second signal in the frequency band of said first signal, during the first portion of said detection time interval. The probing method further comprises processing a second portion of said second signal, to calculate a second signal value indicative of the signal power of said second signal in the frequency band of said first signal, during the second portion of said detection time interval.

The invention belongs to the technical field of thermal protector testing, and particularly relates to a thermal protector parameter testing method which comprises the following steps: testing preparation: connecting a thermal protector to be tested into a testing circuit, and setting various testing parameters in a data acquisition and processing system; testing and data acquisition: switching on a test circuit to test the thermal protector, and transmitting the acquired data to a data acquisition and processing system; and data processing and analysis: the data acquisition and processing system stores and analyzes various parameters obtained by the test, generates a test report, and evaluates the performance of the thermal protector at the same time. According to the invention, a plurality of parameter tests are integrated in one test process for acquisition, so that the test steps and the test time are greatly reduced, the test efficiency is improved, the test cost is reduced, the influence of environmental factors and equipment errors on test results is effectively reduced, the accuracy of test data is ensured, and real performance parameters of the thermal protector are accurately reflected.

An apparatus includes a safety fault interrupter circuit. The safety fault interrupter circuit includes a safety fault monitor coupled to a first bias node and configured to selectively assert a fault interrupter signal based at least in part on a first bias voltage and a first power consumption. The safety fault interrupter circuit also includes a power fault monitor for the safety fault monitor, wherein the power fault monitor is coupled to a second bias node and is configured to selectively assert the fault interrupter signal based at least in part on a second bias voltage and a second power consumption that is less than the first power consumption.

A circuitry for testing a protection mechanism against an overvoltage event at a vehicle assembly 120 of a vehicle having at least one motor for electric propulsion, said vehicle assembly associated w

The invention relates to a surge protection device, a transmitter, a surge protection system and a mutual communication transmitter. A surge protection device (1) is mounted on a transmitter. The terminal block screw portions (12, 13) are connected to a cable that transmits a signal from an external device. The connector is detachable with respect to a connector member of the transmitter, and outputs an input signal from the terminal block threaded portions (12, 13) to the connector member. The surge protection element absorbs a surge current when a surge voltage is applied to the connector member from the terminal block screw portions (12, 13). The terminal connector part (11) is connected to the terminal block screw parts (12, 13) via a surge protection element.

The present disclosure provides a method performed by a differential relaying protection apparatus (102), the method includes: obtaining a first plurality of sample data having a first plurality of sample counts (401), wherein the first plurality of sample counts are associated with a first clock in the differential relaying protection apparatus; mapping the first plurality of sample data having the first plurality of sample counts to a second plurality of sample data having a second plurality of sample counts (402), wherein the second plurality of sample counts are associated with a second clock in the differential relaying protection apparatus (102), and the first clock and the second clock run independently; receiving a plurality of sample data having the second plurality of sample counts from one or more other (202) differential relaying protection apparatuses (403); determining a differential current based on the second plurality of sample data and the plurality of sample data (404); and determining whether a circuit fault occurs based on a value of the differential current (405).

A surge protection device (1) is mounted on a transmitter (100). A cable that sends a signal received from an external device is connected to terminal block screw portions (12, 13). The connector (23) is detachable with respect to a connector component provided in the transmitter (100), and outputs an input signal received from each of the terminal block screw portions (12, 13) to the connector component. The surge protection element (21, 22) absorbs a surge electric current in a case where a surge voltage is applied from the terminal block screw portions (12, 13) to the connector component. The terminal connector portion (11) is connected to the terminal block screw portions (12, 13) via the surge protection element (21, 22).

The application discloses a method, device and system for evaluating the residual life of elements, functional modules and systems. The method comprises the following steps: S1, selecting sensitive devices capable of representing aging indexes in elements, functional modules and systems to determine a state detection strategy, wherein the sensitive devices comprise core components or secondary circuits; S2, applying a detection circuit to at least one sensitive device, wherein the detection circuit is a bypass circuit of the elements, functional modules and systems, and the residual life of each sensitive device under different stress conditions is calculated based on a physical model or an empirical model and a cumulative damage model by applying stress to the sensitive device; and S3, calculating the residual life of the entire element, functional module and system according to the residual life calculation results of each sensitive device and the weights represented by all the sensitive devices. The system and method have high calculation accuracy and low calculation complexity.

A self-diagnostic, self-maintaining, and self-protecting solid-state circuit breaker (SSCB) includes a power semiconductor device, an air gap disconnection unit connected in series with the power semiconductor device, a sensing and drive circuit that switches off the power semiconductor device upon detecting a short circuit or an overload of unacceptably long duration, and a microcontroller unit (MCU) that triggers the air gap disconnection unit to form an air gap and galvanically isolate an attached load after the sensing and drive circuit switches off the power semiconductor device. The MCU is further configured to monitor the operability of the air gap disconnection unit, the power semiconductor device, and other critical components of the SSCB and take corrective action, if applicable, to prevent damage or destruction of the SSCB and the connected load and / or to protect personnel and the environment from exposure to hazardous electrical conditions.

The invention relates to a detection device (1) for detecting abnormal operating conditions at an electrical choke unit (2), in particular a current-compensating choke unit (3) with current-compensating chokes, an electrical filter (4), comprising the electrical choke unit (2) with a first electrical choke (5) in the electrical filter (4), connected in a first electrical phase (6) of an AC power supply network (7) or an internal AC power supply network (8) of an electrical converter (9), a voltage limiting element (10) for limiting undesired voltage drops occurring at the first electrical choke (5), wherein the voltage limiting element (10) is arranged in a parallel circuit to the first electrical choke (5), and a temperature sensor (11) which is arranged on the voltage limiting element (10).Furthermore, the invention relates to a detection method (27) for carrying out the detection of abnormal operating conditions at the electrical choke (2), in particular the current-compensating choke (3), of the electrical filter (4) by means of the detection device (1) and an electrical converter (9) with the detection device (1) which is designed for carrying out the detection method (27).

Embodiments of the present disclosure relate to improved monitoring solutions for electrical systems. The invention relates to a method for detecting a circuit breaker electrically connected between a first line section and a second line section of a power line. The method comprises the following steps: - a first step of feeding one or more first signals at a first point of the power line, wherein the one or more first signals have a frequency content at least partially comprised in a predefined frequency range; - a second step of detecting one or more second signals at a second point of the power line, wherein the one or more second signals are detected with a detection band computed based on the frequency range; - a third step of computing a frequency response function of the power line in the frequency range based on the detected one or more second signals.

To provide an active current compensation device for actively compensating for noise generated in a common mode in each of at least two or more large current paths.SOLUTION: An active current compensation device 100 includes a sensing unit for generating an output signal corresponding to a common-mode noise current on a large current path, an amplifier unit for amplifying an output signal to generate an amplified current, a compensation unit for generating a compensation current based on the amplified current and allowing the compensation current to pass through at least two or more large current paths, and a malfunction detection unit for detecting malfunction of the amplifier unit. At least a part of the amplifier unit and the malfunction detection unit are built in a single integrated circuit (IC) chip 500.SELECTED DRAWING: Figure 1

The invention relates to the technical field of batteries, and discloses a BMS heating protection circuit and a fault detection method.The protection circuit comprises a switch control circuit, a heating connector, a heating power source, an anti-reverse-connection circuit and a secondary protection circuit, one end of the heating connector is connected with one end of the anti-reverse-connection circuit, and the other end of the heating connector is connected with the other end of the anti-reverse-connection circuit; the other end of the heating connector is connected with the negative electrode of the heating power supply through a heating switch of the switch control circuit; and the positive electrode of the heating power supply is also connected with the secondary protection circuit, and the secondary protection circuit is used for performing fusing protection when the heating switch is short-circuited or cannot be switched off. By adopting the heating protection circuit, the problems that the battery cell is continuously heated due to improper installation and reverse power polarity connection when the PACK is installed, and the battery cell is continuously heated to cause thermal runaway when the heating switch cannot be switched off due to short-circuit fault of the heating switch MOS driving loop or the MOS itself in the heating loop are effectively solved.