84results about "Electronic protection circuit testing" patented technology

A detection circuit includes a tunable delay circuit that generates a delayed signal and that receives a supply voltage. The detection circuit includes a control circuit that adjusts a delay provided by the tunable delay circuit to the delayed signal. The detection circuit includes a time-to-digital converter circuit that converts the delay provided by the tunable delay circuit to the delayed signal to a digital code and adjusts the digital code based on changes in the supply voltage. The control circuit causes the tunable delay circuit to maintain the delay provided to the delayed signal constant in response to the digital code reaching an alignment value. The detection circuit may continuously monitor timing margin of a data signal relative to a clock signal and update the digital code in every clock cycle. The detection circuit may be a security sensor that detects changes in the supply voltage.

The invention relates to the technical field of relay protection equipment electrical variable state detection, and discloses a relay protection equipment state monitoring system and method, and the system comprises a relay protection circuit abnormal state recognition module, a relay protection circuit abnormal feature analysis module, and a relay protection circuit abnormal feedback module. The time limit abnormal state scientific analysis of the abnormal state of the relay protection circuit is carried out based on relay protection circuit overload current continuous duration information in combination with an intelligent search algorithm and a standard set relay protection circuit overload current safe continuous duration interval. The abnormal state of the relay protection circuit is reliably evaluated based on current overload continuous action duration parameters; the fault state of the relay protection circuit is scientifically and comprehensively judged based on the overload action duration and frequency of the overload current of the relay protection circuit, and the accuracy of monitoring the fault state of the relay protection circuit is improved.

The invention relates to a monitoring device (14) for detecting a leakage current in a surge protection device (12). The monitoring device (14) has a connection (15) for series connection with the surge protection device (12). The monitoring device (14) has a short-circuit current-quenching and / or overvoltage-switching component (20). The monitoring device (14) has a detection circuit (22) connected in parallel to the short-circuit current-quenching and / or overvoltage-switching component (20). The detection circuit (22) comprises at least one measuring capacitor (24) with a measuring capacitance, which is connected in series with the surge protection device (12). The detection circuit (22) comprises measuring electronics (26) configured to detect a leakage current-relevant parameter. Furthermore, an assembly (16) and a method for detecting a leakage current in an overvoltage protection device (12) are described.

The invention relates to a method (100) for monitoring an electrical circuit (1), in particular for implementing predictive maintenance, the method (100) comprising the following steps: measuring (110) at least one parameter (I, U, T) at at least one measurement location (3), the at least one measurement location (3) being located on or in the electrical circuit (1); acquiring (120) the at least one parameter (I, U, T); calculating (130) at least one actual value (131) on the basis of the at least one parameter (I, U, T); determining (140) a deviation (142) of the at least one actual value (131) from a target value (141); analyzing (150) the deviation (142); an analysis result (161) based on the analysis (150) is output (160).

The invention relates to a monitoring device (14) for detecting a leakage current in an overvoltage protection device (12). The monitoring device (14) has a connection (15) for connecting to the overvoltage protection device (12) in series. The monitoring device (14) has a component (20) with a short-circuit-current-extinction and / or overvoltage-switching capability, and the monitoring device (14) has a detection circuit (22) which is connected in parallel with the component (20) with the short-circuit-current-extinction and / or overvoltage-switching capability. The detection circuit (22) comprises at least one measuring capacitor (24) with a measuring capacitance, said capacitor being connected to the overvoltage protection device (12) in series, and the detection circuit (22) comprises measuring electronics (26) which are designed to detect a parameter that is relevant to a leakage current. The invention further relates to an assembly (16) and to a method for detecting a leakage current in an overvoltage protection device (12).

A switchable battery disconnect unit (BDU) system for an electrified vehicle includes a switchable BDU for a high voltage battery system of the electrified vehicle, the switchable BDU including one or more protection devices that each include both a contactor and an integrated circuit breaker, and a controller configured to control the switchable BDU to switch between 400 Volts (400V) and 800V direct current (DC) modes for powering an electrified powertrain of the electrified vehicle and for recharging the high voltage battery system and monitor and reset the protection device in response to an actuation of the integrated circuit breaker, wherein the protection device does not include a replaceable thermal fuse.

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).

A method for monitoring a circuit, in particular in order to make possible a predictive maintenance. At least one parameter is measured at least at one measurement position. The at least at one measurement position is located on or in the circuit. The at least one parameter is acquired. At least one actual value is calculated based on the at least one parameter. A deviation of the at least one actual value is determined from a target value. An analysis of the deviation is performed. An analysis result is output based on the analysis.

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.

It is disclosed an electronic circuit to verify the state of integrity of a diode. The electronic circuit comprises a voltage comparator and a voltage divider. The electronic circuit is configured to generate a monitoring signal having a first value indicative of a state of correct operation of the diode and having a second value indicative of a state of short circuit of the diode.

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

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.

An earth leakage protection device, an electrical connection device and an electrical appliance, the earth leakage protection device comprising: a switch module for controlling power connection between an input end and an output end of a power line; the electric leakage detection module is used for generating an electric leakage fault signal when detecting that the leakage current on the power line exceeds a set threshold value; the power supply module comprises a first current limiting element, is coupled between the power line and the electric leakage detection module in series, and supplies power to the electric leakage detection module; the driving module comprises a first electromagnetic coil and a first switch semiconductor device, and drives the switch module to disconnect the power connection when receiving the electric leakage fault signal; the first end of the first electromagnetic coil is coupled to the power line and the second end is coupled to the first end of the first switch semiconductor device. The first end of the first current limiting element is coupled to the power line and the second end is coupled to the first end of the first switch semiconductor device through at least one first diode and / or a second current limiting element. Techniques of the present disclosure may reduce power consumption of a leakage protection device and provide leakage current detection of pulsating DC characteristics.

A detection circuit includes a tunable delay circuit that generates a delayed signal and that receives a supply voltage. The detection circuit includes a control circuit that adjusts a delay provided by the tunable delay circuit to the delayed signal. The detection circuit includes a time-to-digital converter circuit that converts the delay provided by the tunable delay circuit to the delayed signal to a digital code and adjusts the digital code based on changes in the supply voltage. The control circuit causes the tunable delay circuit to maintain the delay provided to the delayed signal constant in response to the digital code reaching an alignment value. The detection circuit may continuously monitor timing margin of a data signal relative to a clock signal and update the digital code in every clock cycle. The detection circuit may be a security sensor that detects changes in the supply voltage.

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.

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 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 application relates to an active current compensation device which actively compensates for a noise occurring in a common mode in each of two or more high-current paths. In one aspect, the active current compensation device includes a sensing unit configured to generate an output signal corresponding to a common-mode noise current on each of the two or more high-current paths, and an amplification unit configured to amplify the output signal to generate an amplified current. The device may also include a compensation unit configured to generate a compensation current on the basis of the amplified current and allow the compensation current to flow to each of the two or more high-current paths, and a malfunction detection unit configured to detect a malfunction of the amplification unit. The malfunction detection unit and at least a portion of the amplification unit may be embedded in one integrated circuit (IC) chip.

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 invention provides a current-limiting function detection device and method for a lithium battery protection board, and the device comprises an upper computer, and a programmable power supply S1, a programmable power supply S2 and an electronic load which are respectively connected with the upper computer, and the positive and negative electrodes of the programmable power supply S1 are correspondingly connected to a battery end B + wiring terminal and a battery end B-wiring terminal of the lithium battery protection board to be detected. The positive electrode and the negative electrode of the programmable power supply S2 are correspondingly connected to the power supply terminal P + and the power supply terminal P-of the lithium battery protection board to be tested; one end of the electronic load is respectively connected with the positive electrode of the programmable power supply S1 and the battery end B + of the lithium battery protection board to be tested, and the other end of the electronic load is respectively connected with the negative electrode of the programmable power supply S1 and the battery end B-of the lithium battery protection board to be tested; and the upper computer controls the opening or closing of the current limiting function of the lithium battery protection board to be tested, and judges whether the current limiting function of the lithium battery protection board is qualified or not according to the simulated charging current collected before and after current limiting. Therefore, the real lithium battery does not need to be charged in the whole test process, and the test process is high in safety and reliability and high in efficiency.

Disclosed in the present application are a circuit protection apparatus, a battery management system and an electrical device. The circuit protection apparatus comprises a current measurement module, a drive module and a fusing module. The current measurement module is separately connected to the drive module and a circuit undergoing test; and the current measurement module is configured to measure a current value in said circuit, and, when the current value is greater than a preset current threshold, to send a drive signal to the drive module. The fusing module is connected in series into said circuit. An input end of the drive module is connected to the current measurement module; an output end of the drive module is connected to the fusing module; and the drive module is configured to drive, when the drive signal is received, the fusing module to disconnect said circuit. When overcurrent occurs to circuits, the embodiments of the present application can reduce delay time for circuit disconnection control operations, so as to increase the speed of disconnecting the circuits, thus improving the effects of overcurrent protection.

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).

It is disclosed an electronic circuit (10) to verify the state of integrity of a protection diode (13). The electronic circuit (10) comprises a voltage comparator (18) and a voltage divider. The electronic circuit (10) is configured to generate a monitoring signal S_DG having a first value indicative of a state of correct operation of the protection diode (13) and having a second value indicative of a state of short circuit of the protection diode (13).