86 results about "Surge voltage" patented technology

The invention discloses an OLTC topological structure of an electronic soft switching technology and a driving method. In the topological structure, a power supply is connected with a first transformer, the first transformer is connected with a second transformer, and the second transformer is connected with a load; a low-voltage winding of the first transformer is connected with a plurality of taps; the fixed end of the low-voltage winding of the first transformer and each tap are connected with one end of an independent mechanical switch; according to an interval connection mode, the other ends of all the mechanical switches are connected to form two series switch loops, and each series switch loop is connected with an independent electronic change-over switch to form two series circuits; the two electronic change-over switches are connected in parallel, and the second transformer is connected into a series circuit controlled by the two electronic change-over switches respectively. The mechanical switch and the electronic change-over switch are jointly used, so that short-circuit current and surge voltage cannot be generated when the electronic change-over switch performs state switching, and the quality of output voltage waveforms is improved.

The invention relates to the technical field of power electronics, and discloses a surge voltage suppression system and a control method thereof. The system comprises a surge feature extraction unit, a suppression map generation unit, a strategy deduction and check unit and an instruction synthesis and distribution unit which are connected in sequence. According to the method, surge feature descriptors are extracted and fused with a historical case library and a real-time power grid topology, and a suppression atlas containing multi-path parameter combination is dynamically generated; and performing time sequence deduction and interaction influence calculation on each path in the map, iteratively correcting parameters to output a checked strategy sequence, and finally converting the strategy sequence into an instruction to control the action of the physical suppression equipment. According to the method, the whole process of the suppression strategy from historical experience learning, dynamic generation to global collaborative rehearsal optimization is realized, and the adaptability, the collaboration and the reliability of responding to surges in a complex power grid environment are improved.

The utility model discloses a surge protection circuit, a controller, a battery management system, power distribution equipment and a vehicle. The surge protection circuit comprises a first transient voltage suppressor diode and a second transient voltage suppressor diode, the anode of the first transient voltage suppressor diode is connected with the anode of the second transient voltage suppressor diode, and the cathode of the first transient voltage suppressor diode is suitable for being connected with the anode end of a power supply. The cathode of the second transient voltage suppression diode is suitable for being connected with the negative terminal of the power supply and the first grounding terminal. According to the surge protection circuit, when a positive surge occurs and the first transient voltage suppressor diode is broken down, the second transient voltage suppressor diode can serve as a common diode to be conducted, surge voltage is discharged from the first grounding end, and when a negative surge occurs and the second transient voltage suppressor diode is broken down, the surge voltage is discharged from the second grounding end. And the first transient voltage suppression diode can be conducted as a common diode, so that the surge resistance of a subsequent circuit can be improved.

The utility model discloses a voltage surge generation circuit, include: auxiliary source subcircuit, monostable subcircuit and external power supply switching subcircuit, auxiliary source subcircuit is used for the power supply of monostable subcircuit, monostable subcircuit is used for through the timer output high level time of configuration self, to output control signal, external power supply switching subcircuit is used for under the control of control signal output corresponding surge voltage. The utility model discloses utilize auxiliary source subcircuit, monostable subcircuit and external power supply switching subcircuit composition voltage surge generation circuit, has realized the generation of surge voltage, compared with the existing surge generator has simple structure, response speed is fast and the characteristics of high reliability. Further, can edit the timer peripheral circuit in monostable subcircuit according to actual needs, to control the pulse width of surge voltage, adjusts the surge voltage of external power supply voltage output different voltage grade.

The invention provides a rapid flexible switching method for a permanent magnet synchronous motor winding reconstruction circuit, and belongs to the technical field of permanent magnet synchronous motor winding reconstruction. In order to solve the problems of surge voltage, impact current, torque drop and even torque interruption generated in a motor winding reconstruction transient state and relatively long transient state reconstruction time in an existing permanent magnet synchronous motor winding reconstruction method, the method comprises the following steps: step 1, in a zero vector interval of space vector pulse width modulation, carrying out space vector pulse width modulation; the permanent magnet synchronous motor winding reconstruction circuit enters a reconstruction transient state; 2, forming three different natural follow current loops of a mode 1, a mode 2 and a mode 3 by utilizing the combination of the switching states of the motor winding, the inverter, the series reconfiguration switch and the parallel reconfiguration switch, and adjusting the length of a zero vector interval required by winding reconfiguration according to the operation condition; and step 3, completing all reconstruction transient states in a zero vector interval of space vector pulse width modulation, and realizing switching of motor winding connection modes.

The utility model relates to an anti-surge circuit and an energy storage system. The anti-surge circuit comprises an energy storage starting unit, a main circuit switch unit, a surge switch unit, a primary anti-surge unit and a secondary anti-surge unit. Wherein the energy storage starting unit is used for controlling the conduction of the main circuit switch unit when an input power supply is connected, so as to connect a path between the input power supply and a load through the main circuit switch unit. In the process of connecting the path through the main circuit switch unit, if the input voltage of the input power supply is between a first voltage value and a second voltage value, the first-stage anti-surge unit is controlled to be switched on through the first surge voltage at the first connecting part, so that the first surge voltage is absorbed through the first-stage anti-surge unit; the surge switch unit is controlled to be switched on through the first surge voltage, so that the main circuit switch unit is switched off; and if the input voltage is greater than the second voltage value, a second surge voltage at the first connection part is absorbed through the second-stage anti-surge unit. By adopting the anti-surge circuit, the safety can be improved.

Disclosed in the present application are a varistor mounting structure and an electrical connection device, the electrical connection device comprising a power supply line (100) and a detection and protection apparatus provided on a circuit board and electrically connected to the power supply line (100). The detection and protection apparatus comprises a trip coil (Lx) for generating an electromagnetic force to disconnect an electrical connection, and a first varistor (ZR1) for absorbing a surge voltage. A support frame (400) for fixing the trip coil (Lx) is provided on the circuit board, and a first mounting portion (410) for mounting the first varistor (ZR1) is provided on the support frame (400). The first mounting portion (410) is provided with a first mounting hole (411) and a second mounting hole (412) for two pins of the first varistor (ZR1) to pass through respectively, and an isolation portion (413) for increasing a creepage distance is provided between the first mounting hole (411) and the second mounting hole (412).

The invention belongs to the technical field of aircraft control, and particularly discloses an airborne power supply control system and method, and the method comprises the steps: a protection circuit achieves the power supply overcurrent protection, surge current suppression protection and surge voltage protection of an input aircraft power supply, and transmits the power supply overcurrent protection, surge current suppression protection and surge voltage protection to a filter circuit; the filter circuit carries out electromagnetic interference filtering on the input airplane power supply and sends the electromagnetic interference to the power supply interruption detection circuit, the power supply control circuit and the energy storage circuit respectively; when the power supply of the aircraft is cut off instantaneously, the energy storage circuit continues to supply power to the flight control equipment to enable the flight control equipment to work normally. The power supply interruption detection circuit detects the working state of an aircraft power supply in real time, and sends power supply interruption information to the flight control equipment when detecting that the aircraft power supply has power supply transient interruption; and after receiving the power supply interruption information, the flight control equipment controls the power supply control circuit to cut off the power supply of the aircraft power supply to other equipment, and controls the aircraft power supply to supply power to other equipment again after a preset time is delayed.

The utility model provides an integrated electronic protection device and a photoelectric sensor employing the same, the integrated electronic protection device comprises a housing, a Schottky diode and an array TVS tube are arranged in the housing, the array TVS tube comprises an N-type semiconductor substrate located in the housing and four first P-type base regions arranged on the surface of the N-type semiconductor substrate, and the four first P-type base regions are arranged on the surface of the N-type semiconductor substrate. First anode electrodes are arranged on the surfaces of the four first P-type base regions, and first metal layers capable of leading out pins are arranged on the surfaces of the first anode electrodes; compared with the prior art, the integrated electronic protection device has the following beneficial effects that the integrated electronic protection device is high in integration level and very small in size, so that the integrated electronic protection device can be applied to a miniature photoelectric sensor, the space is greatly saved, and surge voltage protection and power supply polarity protection are taken into consideration; in addition, the integrated electronic protection device in the utility model carries out surge voltage protection between lines, the residual voltage is relatively low, and the requirement on the withstand voltage of a post-stage circuit is not very high.

A discharge control switch is protected against surge voltage. A battery pack is provided in which a discharge control switch is connected to a positive electrode side power line between a positive electrode terminal and a positive electrode output terminal of a battery or a negative electrode side power line between the negative electrode terminal and a negative electrode output terminal of the battery, a reflux portion is connected between the positive electrode side power line and the negative electrode side power line on a side closer to the positive electrode output terminal and the negative electrode output terminal than the discharge control switch, a reflux control signal is output from a control unit to an insulating portion, and a switch unit is switched from off to on based on the reflux control signal.

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 utility model relates to a differential mode surge protection circuit, a filter and a photovoltaic energy controller. The circuit comprises two fuses, a first differential mode protection module, a second differential mode protection module and an access terminal, the two fuses are respectively connected with a first differential input end and the access terminal of an RS485 module through a first lead, and a second lead is connected with a second differential input end and the access terminal of the RS485 module; the access terminal is used for accessing an external differential mode surge voltage; the first differential mode protection module is connected between the two fuses and the access terminal and is used for performing surge voltage relief on external differential mode surge voltage and outputting first differential mode voltage to pass through the two fuses; and the second differential mode protection module is connected between the RS485 module and the two fuses, and is used for performing surge pressure relief on the first differential mode voltage and outputting a second differential mode voltage to the RS485 module. By adopting the circuit, the discharge behavior caused by external differential mode surge voltage when the distance between the two fuses is very close can be avoided.

The application provides a surge voltage suppression circuit and method, and relates to the technical field of power electronics. The circuit comprises: a surge detection circuit, an input end of which is connected to a bus to be protected, and used for acquiring a bus voltage of the bus to be protected; a discharge circuit, used for discharging a surge energy of the bus to be protected when the bus to be protected is accessed; a power switch circuit, used for connecting the discharge circuit and the bus to be protected, so as to control the discharge circuit to access or be separated from the bus to be protected; and a control circuit, an input end of which is connected to an output end of the surge detection circuit, and an output end of which is connected to a driving end of the power switch circuit; the control circuit is used for controlling the power switch circuit to be turned on or turned off according to the bus voltage, a preset upper threshold value and a preset lower threshold value. The application can realize fast and stable suppression of high-energy surge voltage in the scene of bus high-power surge suppression, reduce the loss and heat quantity of the power switch circuit, and improve the power density and reliability of the surge voltage suppression circuit.

The invention discloses a control device and method for a vehicle intelligent distribution box, and the system comprises a voltage stabilization module which is used for adjusting the output voltage of the distribution box in real time; the overvoltage absorption module is used for carrying out voltage clamping protection and energy discharge; the intelligent power module is used for carrying out dynamic power distribution management according to the actual operation condition of the load and carrying out automatic fault judgment and state monitoring; and the power distribution control module is used for carrying out data interaction with a vehicle information system, carrying out data interaction with a CAN network in the intelligent power module and controlling the intelligent power module. According to the device, automatic fault judgment and state monitoring can be realized through the intelligent power module, so that faults such as short circuit and overcurrent can be identified in time, a power supply can be quickly cut off when faults occur, and equipment damage or fire hazard triggering can be prevented; and peak and surge voltage formed by various reasons of the vehicle power grid is absorbed through the overvoltage absorption module, so that the safety and the stability of the vehicle power grid are maintained.

This invention discloses a surge protection circuit for gallium nitride (GaN) power devices in a power factor correction (PFC) circuit, aiming to solve the problems of insufficient surge resistance of GaN power devices and the high residual voltage of existing surge protection schemes, which easily leads to overvoltage breakdown of GaN power devices. A surge suppression unit is set between the rectifier circuit and the PFC main circuit. The surge suppression unit adopts a common-mode inductor containing a first coil L2A and a second coil L2B, coupled with a varistor VR4 in series, and is paired with capacitors C1 and C2 to form a π-type filter. Under normal operating conditions, it performs voltage filtering. During a lightning surge, VR4 breaks down, generating a surge current in L2A. The second coil L2B couples to generate a reverse electromotive force to offset the surge voltage, reducing the residual voltage at the input of the PFC main circuit. A primary protection unit assists in surge suppression. The PFC main circuit adopts a Boost topology and GaN power devices. This circuit has a simple structure, low cost, and high reliability, and is suitable for surge protection of outdoor GaN power supplies such as LED streetlights.

The invention provides a surge protection circuit and an electronic device, the surge protection circuit comprises an impedance unit and a first surge protection unit, and the impedance unit is used for reducing the amplitude of a surge current of a surge signal; the first surge protection unit comprises a first blocking unit, a first clamping unit and a first discharge unit; the first clamping unit is used for clamping the surge voltage of the surge signal to a target range of the target chip; the first discharge unit is used for discharging a surge signal; the first blocking unit is used for blocking the surge signal from flowing to the target chip. According to the surge protection circuit, when the target chip suffers from the surge signal, the impedance unit can be utilized to reduce the amplitude of the surge current of the surge signal, and the clamping unit is utilized to clamp the surge voltage of the surge signal to the target range of the target chip, so that the probability of damage to the target chip is reduced, and the reliability of the surge protection circuit is improved. The surge protection circuit is high in protection level and can adapt to a lightning sensitive area or a large power equipment area.

The invention relates to the technical field of battery management systems, in particular to a monomer acquisition optimization method, which comprises the following steps of: acquiring a copper bar as a virtual battery cell, acquiring a voltage signal of the copper bar through an unused channel, establishing a surge voltage calculation model at the moment when a relay is closed, and evaluating whether a TVS (Transient Voltage Suppressor) tube is added to protect a front-end AFE acquisition chip or not. The problem of voltage acquisition errors caused by inaccurate cross-acquisition copper bar compensation can be effectively solved, meanwhile, the risk of damage of surge voltage to an acquisition chip is avoided, the acquisition precision and the system stability are remarkably improved, and support is provided for standardization and platformization of a BMS scheme in the new energy field.

The utility model discloses a rapid wiring type surge protector. The rapid wiring type surge protector comprises a housing, a circuit board, a first terminal assembly and a second terminal assembly. An accommodating space and a terminal groove are arranged in the shell, and the circuit board is arranged in the accommodating space; each terminal assembly comprises a terminal base, a conductive terminal, an elastic clamping piece and a button. The terminal seat is provided with a terminal accommodating space and a wiring hole, and the elastic clamping piece is abutted between the conductive terminal and the inner wall of the terminal seat. The button is installed on the terminal base in a pressing mode, the button is pressed to enable the upper end of the elastic clamping piece to be separated from the conductive terminal, and the elastic clamping piece clamps the wire rod when the button is loosened. The circuit board, the terminal assembly and the conductive terminal are integrated in the shell, and the button, the elastic clamping piece and the conductive terminal are matched to realize quick disassembly and assembly of the wire rod; the piezoresistor circuit is used for filtering high-voltage surge, when the voltage exceeds a threshold value, the resistance is reduced, the discharge tube circuit breaks down to form a discharge loop, and common-mode protection is achieved; and the trigger circuit acts surge voltage on the discharge tube circuit to realize the characteristic of low residual voltage.

This suppresses surge voltage during switching when switching a toggle switch from the ON state to the OFF state. [Solution] The power conversion device comprises a first inverter connected to a power line connected to an energy storage device and connected to each phase of an open-winding motor, a second inverter connected to a power line and connected to each phase of an open-winding motor, and a line connection switching element attached to the positive electrode side line of the power line between the first inverter and the second inverter. The line connection switching element is made of a semiconductor switching element having a larger parasitic capacitance than the switching elements of the first and second inverters.

The invention discloses a DC generator surge voltage protection system and protection method, and belongs to the technical field of aviation power supply systems. The system comprises a direct-current generator, a generator control unit, a main feeder, a main contactor and a direct-current bus bar. A generator control unit collects voltage of a generator adjusting point, compares the voltage with set overvoltage, undervoltage and surge voltage thresholds, and confirms through anti-delay timing, so that abnormal faults of overvoltage, undervoltage and surge voltage are judged, and protection measures are taken; the protection measures comprise a generator overvoltage judgment program, an undervoltage judgment program and a repeated surge voltage judgment program. On the basis of traditional overvoltage and undervoltage fault protection, surge changes, caused by normal and abnormal load changes, of output voltage of the generator are effectively recognized, a surge voltage judgment method is provided, overvoltage and undervoltage sequence and repeated surge voltage fault protection functions of the generator are perfected, and the system safety is improved.

The utility model belongs to the technical field of circuit structures, and relates to an LED driving power supply anti-surge voltage spike suppression circuit with an OVP function, which is provided with a main chip IC, and the main chip IC comprises a sixth pin, a seventh pin and an eighth pin. The sixth pin is a power supply pin; the eighth pin is an overvoltage protection pin (OVP pin), and the seventh pin is an under-voltage protection pin (UVP pin); the eighth pin is connected with the ground end, at least one resistor is connected in series between the eighth pin and the ground end and is a fifth resistor, and the seventh resistor is an OTP resistor; the seventh pin is outwards connected with a sixth resistor; a first node is arranged between the fifth resistor and the seventh resistor, and a second node is arranged between the seventh resistor and the ground end; according to the circuit provided by the utility model, the filter capacitor is designed at the pull-down detection signal of the OVP pin, so that the overall anti-interference capability of the circuit is improved, the cost is extremely low, and the circuit is very practical.

The utility model discloses a kind of mine intrinsic safety type wireless image processing display circuit, including AI board, AI board connection switch board, switch board connection liquid crystal screen drive board, the chip model of the AI board is RK3588;The AI board is equipped with power input circuit, and the power input circuit is constituted by current protection circuit, slow start circuit, 4V overvoltage protection circuit and 5V overvoltage protection circuit;The AI board is equipped with communication circuit, and the communication circuit is constituted by RJ45 communication circuit, electrical voltage stabilizing tube group;The switch board is equipped with power supply circuit, and the power supply circuit is equipped with 3.3V overvoltage protection circuit, voltage reduction circuit.Can carry out video processing, according to AI algorithm, relatively corresponding alarm function is carried out;When excessive current or short circuit occurs, fuse protection;Prevent interface end to appear surge voltage, or the voltage impact caused by other misoperation, play the role of protection circuit.

The application discloses a motor control system, a motor control method, a storage medium and an electronic device. The motor control method comprises the following steps: a power supply circuit is used for outputting a first direct current voltage; a thin film capacitor is connected in parallel on both sides of the power supply circuit; a surge suppression circuit is connected in parallel on both sides of the thin film capacitor, and is used for suppressing a surge voltage on both sides of the thin film capacitor to obtain a second direct current voltage, wherein the surge voltage is the first direct current voltage exceeding a first preset voltage; and a driving circuit is connected with the surge suppression circuit and a motor, and is used for driving the motor according to the second direct current voltage. The application solves the technical problem of damage to the circuit caused by the fact that the thin film capacitor is difficult to absorb a large amount of surge voltage.

The invention discloses a real-time surge protection method and device, electronic equipment and a storage medium, and relates to the field of financial science and technology or other related technical fields, and the method comprises the steps: activating a three-stage cooperative protection circuit under the condition that a surge voltage is detected; surge voltage energy higher than a preset energy threshold in the surge voltage is discharged through a first-stage bandwidth energy dredging circuit of the three-stage cooperative protection circuit, and dredging voltage is obtained; clamping the voltage value of the dredging voltage to a preset range through a second-stage precision voltage clamping circuit of the three-stage cooperative protection circuit to obtain a clamping voltage; and the clamping voltage is filtered through a third-stage output circuit of the three-stage collaborative protection circuit, and a filtered voltage is output. According to the invention, the technical problems of service interruption and difficulty in effective protection of the surge phenomenon caused by a one-step surge protection mode based on a protection circuit in the prior art are solved.

The embodiment of the invention discloses an airborne power distribution system, and the system comprises a lightning protection unit, a filtering unit, a peak signal suppression unit, an anti-reverse connection unit, a voltage detection unit, a surge suppression unit, a discharge unit, a transient interruption maintaining unit, and an output isolation unit. According to the invention, A4J4L4 lightning protection, CS106 400V peak signal suppression, 600V / 10 microseconds peak signal suppression, 80V surge voltage suppression, 200 microseconds transient interruption power failure maintenance, input reversed polarity protection and other processing can be carried out on the direct current 28V power supply of the airplane power supply, so that the power supply input of a plurality of electronic devices needing the direct current 28V power supply of the airplane is stable and reliable, and the plurality of electronic devices are protected from being damaged.

The present disclosure provides a terminal block that can improve the surge resistance. A terminal block (1) according to an aspect of the present disclosure comprises: at least one busbar (3); a block body and a magnetic member (28). A load is connected to one end (3a) of opposing ends of the busbar (3). The block body (4) supports the busbar (3) and is fitted to an attachment destination (7) to be attached. The magnetic member (28) is provided to the block body (4) so as to enclose the busbar (3) from the surroundings in order to suppress partial discharging caused by a surge voltage generated by driving of the load.

A switching element has a plurality of gate portions extending along a first direction. Each region between center lines of the gate electrodes is a unit semiconductor region. A semiconductor substrate has a plurality of electric field relaxation regions arranged at an interval apart from a body region on a lower side of the body region, and a plurality of connection regions of a second conductive type connecting the corresponding electric field relaxation regions and the body region. Each electric field relaxation region has a linear portion extending across a plurality of the unit semiconductor regions along a second direction intersecting the first direction. A plurality of the linear portions constitute column portions arranged in a line shape along the second direction with an interval portion. The connection region connects the linear portion and the body region. The connection region is provided one for one with respect to one electric field relaxation region. Thus, in the switching element having the electric field relaxation region, a surge voltage can be suppressed.

A voltage transient protection utilizes Zener diodes, resisters, and a power MOSFET to clamp down the DC spike or surged voltage at the input and prevent damage to the inverter's DC power and control section. The input reverse polarity protection utilizes blocking diodes and a switch to cut off reverse voltage and prevent damage to the DC power and control section of the inverter. Once the surge voltage and / or reverse voltage conditions have been removed, the inverter will automatically recover and power on. In addition, an AC output interlock protection circuit is in place to provide safety protection to the external load. The AC output interlock protection circuit utilizes interlock jumpers on the mating connectors, which when detected (or in response to a control signal), it will activate the internal power relays and enable the AC output voltage to the terminals coupled to the external load.

FIELD: electrical engineering.SUBSTANCE: invention relates to high-voltage equipment, in particular to high-voltage gas-insulated switchgear units (GIS). The method for installing a non-linear surge arrester (NLSA) in a complete gas-insulated switchgear comprising gas-filled high-voltage bushings consists in the fact that a supporting metal structure with mounting places for installing the NLSA is placed in the central part of the complete switchgear between gas-filled high-voltage bushings of the same phase in such a way that the overall dimensions of the supporting metal structure do not extend beyond the overall dimensions of the complete switchgear, the NLSA is installed on the mounting places of the supporting metal structure, arranging them at an angle of 90° to the axis of the switch pole and at an angle from 0 to 90° to each other, ensuring the required insulation distances to the grounded and live elements of the complete switchgear, the surge arrester is connected to the inputs of the complete switchgear by a conductive connection adapted for changing the connection point from the line input to the transformer input and back without dismantling the surge arrester from the supporting metal structure. The method for installing surge arresters in switchgear is applicable both for transporting and installing switchgear as part of a mobile substation in hard-to-reach places, in particular in conditions of extremely low temperatures, by any type of transport, and for using the proposed switchgear configuration as part of stationary substations.EFFECT: ensuring the required insulating distances between high-voltage devices, as well as in ensuring the possibility of changing the point of electrical connection of the surge voltage limiter (SVL) in the gas-insulated switchgear (GIS) without moving the SVL on the transport platform.3 cl, 4 dwg

This invention provides a power factor correction circuit that can suppress the surge voltage generated between the drain and source of a switching element during the first switching of each half-cycle. [Solution] The power factor correction circuit 1 comprises a high-frequency leg 11 connected to the AC voltage Vin via an inductor L, and a commercial leg 12 directly connected to the AC voltage Vin. The power factor correction circuit 1 includes a discharge circuit 13 for discharging the output capacitance Coss of the commercial leg 12. The power factor correction circuit 1 discharges the output capacitance Coss by the discharge circuit 13 during the dead time at the start of the half-cycle, and then turns on the commercial leg 12 before the high-frequency leg 11.