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44results about How to "Protect the circuit" patented technology
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Measurement probe with heat cycle event counter
ActiveUS20160004956A1Protect the circuitSave powerBatteries circuit arrangementsRegistering/indicating working of machinesMeasurement deviceComputer module
A system comprising a measurement device and a handheld device is disclosed, the system adapted to withstand, detect, record, and display heat cycle event counts. The measurement device comprises a sensor for measuring and a heat cycle detection unit. The heat cycle detection unit comprises a temperature or pressure responsive element, a detection module, data interface, and data memory. The handheld device comprises a screen, a button, a communication circuit, and a processing system. The communication circuit is configured to communicate with the measurement device and a computing device and the processing system is configured to receive non-measurement information from the measurement device, display the received information on the screen, and cycle the received information displayed on the screen based on an actuation of the button, wherein the handheld device is used to display a heat sterilization cycle count of the measurement device.
Owner:BROADLEY JAMES
Method and Apparatus for Over-voltage Protection With Breakdown-Voltage Tracking Sense Element
InactiveUS20100232081A1Improve breakdown voltageProtection from damageTransistorSemiconductor/solid-state device manufacturingControl circuitPower integrated circuits
A power integrated circuit with internal over-voltage protection includes a power transistor monolithically integrated with a sense element and a control circuit. The power transistor is connected to an output terminal that is connected (or is connectable) to an external load. The sense element is connected to the output terminal in parallel with the power transistor. The sense element is constructed to be similar to the power transistor except that the sense element has a lower breakdown voltage. When the voltage of the output terminal exceeds the breakdown voltage of the sense element a breakdown current flows from the gate of the sense element to the control circuit. Inside the control circuit, a comparator or other over-voltage protection circuit monitors this feedback and controls the power transistor accordingly to protect the power integrated circuit from damage.
Owner:ADVANCED ANALOGIC TECHNOLOGIES INCORPORATED
Battery device, electronic cigarette and control method thereof
InactiveCN105595430APrevent dry burningProtect the circuitTobacco devicesElectrical batteryElectricity
The invention provides a control method of an electronic cigarette. The electronic cigarette comprises an atomization device and a battery device, wherein the atomization device comprises a liquid guide element and a heating element; the battery device comprises a wetting detection module, a control module, a storage module, a switch module and a power source module. The control method comprises the following steps: the wetting detection module detects a relevant physical quantity X and feeds back the relevant physical quantity X to the control module; the control module calculates according to corresponding relation data of relevant physical quantity X and wetting degree Q prestored in the storage module, so as to obtain the wetting degree Q; the control module judges the size relation of the wetting degree Q and a first threshold Q1; if Q is greater than or equal to Q1, the electronic cigarette operates continuously, and if Q is less than Q1, the control module sends a standby command to the switch module; the switch module disconnects the electronic connection between the power source module and the heating element. The invention further provides the electronic cigarette for applying the control method.
Owner:JOYETECH EURO HLDG
Electric automobile thermal management system and control method and device thereof
PendingCN109278497AProtect the circuitPerformance impactAir-treating devicesVehicle heating/cooling devicesFour-way valveElectrical battery
The invention discloses an electric automobile thermal management system and a control method and device thereof. The electric automobile thermal management system comprises a motor circuit, a batterycircuit, an air conditioner cooling circuit, a four-way valve and a controller. The control method comprises the steps of obtaining a cooling fluid temperature of the motor circuit as a first temperature by using a first temperature sensor; obtaining a cooling fluid temperature of the battery circuit as a second temperature by using a second temperature sensor; obtaining a temperature of a BMS inthe battery circuit as a third temperature by using a third temperature sensor; and when the controller detects that the motor circuit has a fault or the battery circuit has a fault, controlling thefour-way valve to communicate with the motor circuit and the battery circuit by using the controller according to the first temperature, the second temperature and the third temperature. According tothe electric automobile thermal management system and the control method and device thereof, when one circuit of the motor circuit and the battery circuit has the fault, the four-way valve communicates with the other circuit to work so as to protect the circuit of the thermal management system and prolong the service life of an automobile. The electric automobile thermal management system and thecontrol method and device thereof can be widely applied to the field of new energy automobiles.
Owner:GUANGZHOU XIAOPENG MOTORS TECH CO LTD
Device for high voltage fast pulse signal real-time turnoff protection
InactiveCN101183785AProtect the circuitEmergency protective circuit arrangementsTesting circuitsDielectricControl signal
A device for real-time shutdown protection of high-voltage fast pulse signals, the pulse signal generator (1) generates a control signal for high-voltage fast pulse generation, controls the pulse power supply (2) to generate high-voltage fast pulses, and acts on the experimental chamber (3) , the discharge current of the experimental cavity (3) is introduced into the current measurement sensor (4), and the voltage signal on the current measurement sensor (4) is connected to a measurement channel of the digital oscilloscope (5), as the trigger source of the oscilloscope, a suitable trigger level. Once the medium breaks down, the discharge current is too large, and the voltage signal on the current measurement sensor (4) is enough to trigger the oscilloscope (5), then the trigger feedback port of the oscilloscope (5) will immediately output a TTL logic signal, which passes through the signal The conversion circuit (6) performs processing, outputs a signal conforming to the shutdown signal interface standard of the pulse signal generator, and turns it off, thereby playing a protective role. The time delay of the present invention can be controlled within 10 μs.
Owner:INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
Novel mobile wall-mounted frequency converter case
ActiveCN108811401AIncrease heightImprove space utilizationCasings/cabinets/drawers detailsCooling/ventilation/heating modificationsLubricationWall mount
The invention discloses a novel mobile wall-mounted frequency converter case comprising a frequency converter case body. Convenient lubrication limiting sliding devices are fixedly connected to four corners of the outer wall of one side, away from a case door, of the frequency converter case body; and the frequency converter case body is connected with a wall-mounted track by the convenient lubrication limiting sliding devices. A brake support plate is fixedly connected to the outer wall of the bottom of the wall-mounted track; and the outer wall of one side, away from the frequency convertercase body, of the wall-mounted track is fixedly connected with the wall surface. The invention relates to the technical field of related frequency converter equipment. The novel mobile wall-mounted frequency converter case is suitable for indoor factory rooms with high dust and indoor humidity. The frequency converter case can be mounted on the wall and can move up and down automatically, so thatthe frequency converter case can be stored at a high altitude, so that the space utilization rate is increased; and the dust accumulation amount and the moisture degree inside the frequency convertercase can be reduced.
Owner:CHAOHU JINHUI AUTOMATIC CONTROL EQUIP
Hydraulic driving system of big arm of heavy railway wagon
InactiveCN108679012AReduce energy consumptionSave time at workServomotor componentsServomotorsMagnetic exchangeLoop control
The invention discloses a hydraulic driving system of a big arm of a heavy railway wagon. According to the technical scheme, the hydraulic driving system includes a hydraulic pump station, a driving cylinder loop, a balance cylinder loop and a balance cylinder oil make-up loop. The hydraulic pump station is connected with the driving cylinder loop and the balance cylinder loop through hydraulic pipes, and the balance cylinder oil make-up loop is connected with the balance cylinder loop through hydraulic pipes. The driving cylinder loop controls the operation of a driving cylinder (20) by a three-position four-way magnetic exchange valve (9), and the pressure of the driving cylinder loop is controlled by a first overflow valve (14) and a second overflow valve (15). The balance cylinder loopcontrols the operation of a balance cylinder (21) by a two-position four-way magnetic exchange valve (32), and the pressure of the balance cylinder loop is controlled by an electromagnetic pressure reducing valve (34). An accumulator (24) of the balance cylinder oil make-up loop is connected with the balance cylinder (21) through a two-position three-way hand-operated direction valve (33). The hydraulic driving system of the big arm of the heavy railway wagon is stable in operation, low in energy consumption and high in safety performance, and hydraulic system faults are easy to troubleshoot.
Owner:WUHAN UNIV OF SCI & TECH
Electric spring energy assimilation system
ActiveCN108879783ASafe and reliable operationProtect the circuitSingle network parallel feeding arrangementsAc network load balancingSingle phasePower grid
The invention discloses an electric spring energy assimilation system. The invention improves the current electric spring structure to adapt to the grid structure of the same end with source and load.An alternating current side of a first single-phase inverter is connected in series with a wide voltage load. A direct current side of the first single-phase inverter is connected with a direct current bus through a bidirectional isolated power electronic transformer. New energy power generation equipment is assembled on the direct current bus, so that an isolated back-to-back structure of the same end with source and load is formed. Under a condition that the power generation power of a distributed new energy power supply is not affected, the alternating current bus voltage is regulated by the wide voltage load, the safe and reliable operation is achieved. An isolated power electronic transformer is arranged between the first single-phase inverter and the grid-connected converter to be isolated. The circuit can be protected, the control program is simplified, and the control of the direct current voltage of the first single-phase inverter is realized. Technical problem that in a weaknetwork environment at the same end with source and load, new energy assimilation is insufficient , which is very prone to occur a high voltage table problem and is hardly solved economically and effectively can be solved.
Owner:GUANGDONG POWER GRID CO LTD +1
Anti-loosening safety socket and plug
ActiveCN111525332AAvoid electric shockProtect the circuitEngagement/disengagement of coupling partsTwo-part coupling devicesElectrically conductiveStructural engineering
The invention belongs to the field of household appliances, and especially relates to an anti-loosening safety socket. The anti-loosening safety socket comprises a socket body, and at least one pair of slots is arranged in the seat body. An elastic reed is arranged in each slot; an inductance coil is fixedly connected in the slot; one end of the inductance coil is electrically connected with a conductive plate; the conductive plate and the inductance coil are electrically connected in series to the circuit of the elastic reed; the inductance coil and the elastic reed are arranged at the upperend and the lower end of the conductive plate respectively, a chute is formed in the side wall of the socket body, the inner bottom face of the chute is communicated with the multiple slots, a protection block is connected into the chute in a sliding mode, and a containing groove is formed in the inner bottom face of the chute. The inductance coil is connected to the circuit of the elastic reed inseries, when the pin is connected with the elastic reed, the inductance coil can generate an inductance phenomenon, so that the current on the circuit is gradually increased, the impact on an electric appliance caused by sudden increase of the current in the circuit can be effectively avoided, and the electric appliance is protected.
Owner:杭州波普电器有限公司
Receptacle connector for a battery in the mobile electric device
InactiveUS7575488B2Minimize a solder rise phenomenonProtect the circuitSmall-sized cells cases/jacketsSoldered/welded conductive connectionsEngineeringSoldering
Owner:AMPHENOL COMML INTERCONNECT KOREA
Electronic device and control method thereof
ActiveUS20190207379A1Protect the circuitRate of change measurementEmergency protection detectionState variationVoltage variation
An electronic device includes a monitoring unit that monitors a voltage of a first terminal that receives power supplied from a power supply apparatus, and a control unit that performs control so as to stop the power supply from the power supply apparatus if a voltage variation per unit time of the first terminal is not less than a first predetermined value or the voltage of the first terminal is not less than a second predetermined value.
Owner:CANON KK
RC-Triggered Power Clamp Suppressing Negative Mode Electrostatic Discharge Stress
InactiveUS20070285853A1Protect the circuitEmergency protective arrangements for limiting excess voltage/currentElectrostatic dischargeStatic electricity
An electrostatic discharge (ESD) power clamp circuit including a RC-delay element coupled to a plurality of serialized inverter elements with a power clamp element and an ESD-triggered keeper device coupled to the plurality of inverters. During negative mode ESD events, the ESD-triggered keeper device is activated and assists the power clamp element to pull up and strongly conduct current to protect the circuit. Additionally, a method of ESD protection in a circuit is provided. The method includes coupling a RC-delay element to an input of a plurality of serialized inverter elements, coupling an output of the plurality of serialized inverters with an ESD-triggered keeper device and a power clamp element, triggering the ESD-triggered keeper device to turn on during negative ESD events and conducting current by the power clamp element with assistance of the ESD-triggered keeper device to protect the circuit as a result of negative ESD events.
Owner:IBM CORP
Overvoltage protection circuit and lamp
InactiveCN104218519AProtect the circuitProtect the loadArrangements responsive to excess voltageOvervoltageControl unit
The invention proposes an overvoltage protection circuit connected between a DC power supply and a load. The overvoltage protection circuit comprises a voltage feedback unit, an overvoltage locking unit and an open circuit control unit, wherein the voltage feedback unit is used for monitoring whether the voltage of the circuit is beyond a set threshold value or not; the input end of the overvoltage locking unit is connected with the output end of the voltage feedback unit; the open circuit control unit is used for controlling the connection of the DC power supply and the load, the control end of the open circuit control unit is connected with the output end of the overvoltage locking unit, the input end of the open circuit control unit is connected with the DC power supply, the output end of the open circuit control unit is connected with the input end of the voltage feedback unit, and a second output end of the open circuit control unit is grounded; and when the voltage feedback unit monitors that the voltage of the output end of the DC power supply is higher than the threshold value, the overvoltage locking unit controls the open circuit control unit to cut off the connection of the DC power supply and the load. The invention also proposes a lamp. With the adoption of the overvoltage protection circuit, the circuit and the load can be protected when the voltage of the circuit is beyond the threshold value.
Owner:OCEANKING DONGGUAN LIGHTING TECH +2
Centrifuge frequency-converting control circuit and control method thereof
InactiveCN105262375ASmall starting currentProtect the circuitAC motor controlPolyphase induction motor starterContactorPower grid
The invention discloses a centrifuge frequency-converting control circuit and a control method thereof. The centrifuge frequency-converting control circuit comprises a variable frequency power supply circuit and a power frequency power supply circuit. The variable frequency power supply circuit comprises a frequency converter and the power input end of the frequency converter is connected with a power frequency three-phase power supply via the normally-opened switch of a contactor KM6. The power output end of the frequency converter is used for powering up a centrifuge via the normally-opened switch of a contactor KM5. The frequency converter is also connected with the normally-opened switch of a relay KA1. The power frequency power supply circuit comprises a normally-opened switch of a contactor KM7 and an FR fuse. The coil power supply circuit of the contactor KM6 and the contactor KM5 is connected in series with the normally-opened switch of a relay KA5 and the normally-closed switch of the contactor KM7. The coil power supply circuit of the contactor KM7 is connected in series with the normally-opened switch of a relay KA6 and the normally-closed switch of the contactor KM5. The relay KA1, the relay KA5, the relay KA6 and the frequency converter are controlled by a PLC. The centrifuge frequency-converting control circuit is small in start-up current, and the impact to the power grid is avoided. Meanwhile, the service life of an electric motor is prolonged. Moreover, the circuit is simple in structure, reliable in operation and strong in overload capability.
Owner:CHONGQING NORMAL UNIVERSITY
Direct current anti-reverse polarity circuit using MOS (metal oxide semiconductor) tube
InactiveCN104682369AProtect the circuitEmergency protective circuit arrangementsOxide semiconductorCircuit protection
The invention discloses a direct current anti-reverse polarity circuit using an MOS (metal oxide semiconductor) tube. The direct current anti-reverse polarity circuit comprises a diode D1, a resistor R1, a voltage-regulator tube D2 and the MOS tube Q1, wherein the anode of the diode D1 is connected with an external power supply of a system, and the cathode of the diode D1 is connected with one end of the resistor R; the other end of the resistor R1 is connected with the cathode of the voltage-regulator tube D2 and the grid of the MOS tube Q1; the anode of the voltage-regulator tube D2 and the drain of the MOS tube Q1 are grounded; the source of the MOS tube Q1 is connected with the grounded end of the system. According to the direct current anti-reverse polarity circuit disclosed by the invention, by utilizing the turnon and turnoff characteristics of the MOS tube, a current loop is cut off after reverse polarity of input voltage, and the circuit protection goal is achieved.
Owner:XIAN GUOLONG BAMBOO TECH
Isolated overvoltage protection circuit and lamp
ActiveCN104218520AGuarantee personal safetyProtect the circuitArrangements responsive to excess voltageOvervoltageEngineering
The invention proposes an isolated overvoltage protection circuit. The isolated overvoltage protection circuit comprises a feedback unit, a comparison unit and an open circuit control unit, wherein the feedback unit is used for detecting whether the voltage in the circuit is beyond a set value or not; a first input end of the comparison unit is connected with an output end of the feedback unit, and a second input end of the comparison unit is connected with a second power supply; the open circuit control unit is used for controlling the on / off of the circuit and a load, a first input end of the open circuit control unit is connected with a first power supply, a second input end of the open circuit control unit is connected with the second power supply, a third input end of the open circuit control unit is connected with an output end of the comparison unit, a first output end of the open circuit control unit is connected with the first input end of the comparison unit, and a second output end of the open circuit control unit is connected with the load; and when the feedback unit detects that the voltage of the circuit is beyond a voltage value, the comparison unit controls the open circuit control unit to cut off the connection of the circuit and the load. The invention also proposes a lamp. With the adoption of the isolated overvoltage protection circuit, overvoltage protection can be achieved, and personal safety of a user is also guaranteed.
Owner:OCEANKING DONGGUAN LIGHTING TECH +2
A portable battery steam cleaner
ActiveUS20180216611A1Protect the circuitSteam generation heating methodsCarpet cleanersPeristaltic pumpControl system
The present invention provides a portable battery steam cleaner comprising in combination of a hollow main body, in which a water tank, peristaltic pump, control system and lithium battery; the water tank in connection with the input of the peristaltic pump; the output of the peristaltic pump in connection with one end of silicone hose; and the other end of silicone hose in connection with the steam generator. The present invention can continuously transport liquid from the water tank, through the silicone hose, into the steam generator, and thus eject steam continuously for cleaning purposes.
Owner:BEIJING CHINA BASE STARTRADE CO LTD
Over-current protection element
InactiveCN102122555AProtect the circuitCurrent responsive resistorsConductive materialPower flowMetal foil
The invention relates to an over-current protection element. The element comprises two metal foils and a PTC (positive temperature coefficient) material layer, wherein the PTC material layer is stacked between the two metal foils and the volume resistance of the PTC material layer is less than 0.1omega-cm; the PTC material layer comprises (i) various crystalline high polymers which comprise at least one crystalline high polymer with melting point being lower than 115 DEG C, (ii) a conductive nickel metal packing with volume resistance being less than 500muomega-cm and (iii) a non-conductive nitride metal packing; and the conductive nickel metal packing and the non-conductive nitride metal packing are dispersed in various crystalline high polymers.
Owner:POLYTRONICS TECH
Method for realizing charging, charger, server and system
InactiveCN109149673AProtect the circuitSave energyDifferent batteries chargingHardware monitoringBattery chargeComputer terminal
The invention provides a method for realizing charging, a charger, a server and a system. The method comprises the following steps: a first communication connection is established between the chargerand the server; a second communication connection is established between the terminal and the server. Obtaining the state of the charger through the first communication connection and obtaining the battery charge information from the terminal through the second communication connection; A charging command or a power off command is sent to the charger according to the state of the charger and the battery charge message, and the charger performs charging or power off operation according to the charging command or power off command. The server judges whether the current terminal needs to be charged or powered off according to the battery power message of the received terminal and the state of the charger corresponding to the current terminal, thereby sending a charging or powering-off instruction to the charger, saving energy and protecting the terminal circuit.
Owner:CHINA MOBILE COMM LTD RES INST +1
A magnetic self-perpetuating relay for the over current protection
InactiveCN1996533BProtect the circuitElectromagnetic relay detailsNon-polarised relaysEngineeringOver current protection
This invention discloses one magnetic keep relay with overflow protection, which comprises base socket and electromagnetic coil on socket, wherein, the base socket two ends are set with yoke iron; two irons are set with drive arm bus between; one side of base socket is set the drive arm bus trigger slice. The invention is characterized by the following: the said electromagnetic line loop is set with overflow protection coil with two ends connected to supply circuit and load, and trigger slices.
Owner:陆德昌
A New Type of Mobile Wall-mounted Inverter Case
ActiveCN108811401BImprove space utilizationReduce dust accumulationCasings/cabinets/drawers detailsCooling/ventilation/heating modificationsFrequency changerEngineering
The invention discloses a novel mobile wall-mounted frequency converter case comprising a frequency converter case body. Convenient lubrication limiting sliding devices are fixedly connected to four corners of the outer wall of one side, away from a case door, of the frequency converter case body; and the frequency converter case body is connected with a wall-mounted track by the convenient lubrication limiting sliding devices. A brake support plate is fixedly connected to the outer wall of the bottom of the wall-mounted track; and the outer wall of one side, away from the frequency convertercase body, of the wall-mounted track is fixedly connected with the wall surface. The invention relates to the technical field of related frequency converter equipment. The novel mobile wall-mounted frequency converter case is suitable for indoor factory rooms with high dust and indoor humidity. The frequency converter case can be mounted on the wall and can move up and down automatically, so thatthe frequency converter case can be stored at a high altitude, so that the space utilization rate is increased; and the dust accumulation amount and the moisture degree inside the frequency convertercase can be reduced.
Owner:CHONGQING ZHONGHENG ELECTRIC APPLIANCE
Computer coaxial dual-oar automatic dedusting cooling fan
InactiveCN107390836AExtended service lifeImprove cooling effectDigital data processing detailsCleaning using toolsSpiral bladeDrive shaft
The invention provides a computer coaxial dual-oar automatic dedusting cooling fan. The cooling fan comprises a dual-shaft motor, a cooling shaft, spiral blades, connecting rods, a shaft cover, a reducer, a brush, a supporting rod, a dedusting disc and a driving shaft, the cooling shaft is assembled at the upper end surface of the dual-shaft motor, the shaft cover is assembled at the upper end surface of the cooling shaft, the spiral blades are arranged at the outer surface of the cooling shaft, the left ends of the connecting rods are fixed to the upper end of the inner surface of an installation cylinder, and the right ends of the connecting rods are fixed to the upper end surface of the shaft cover. Through the design, the problem that an original cooling fan is poor in cooling effect is solved, the reducer is assembled at the lower end surface of the dual-shaft motor, the upper end of the driving shaft is assembled inside the reducer, the lower end of the driving shaft is fixed to the upper end surface of the dedusting disc, the left end of the supporting rod is installed at the outer surface of the dedusting disc, and the brush is assembled at the right end of the supporting rod. The problem that the service life of the original cooling fan is shortened since the cooling fan is often dismantled to remove dust is solved. The computer coaxial dual-oar automatic dedusting cooling fan is compact in structure, good in cooling effect, excellent in dedusting effect, and long in service life.
Owner:张家港市九华科技有限公司
Receptacle connector for a battery in the mobile electric device
InactiveUS20090156023A1Minimize a solder rise phenomenonProtect the circuitSmall-sized cells cases/jacketsCells structural combinationEngineeringSoldering
Provided is a receptacle connector for a battery in a mobile electric device. The receptacle connector includes a contact terminal, a connection terminal, and an extension portion. The contact terminal electrically contacts a plug connector of the mobile electric device. The connection terminal is fit and soldered in a through hole of a battery PCB, and is integrally formed with the contact terminal. The extension portion is bent and extends from a front end of the connection terminal to form a solder receiving space for receiving solder flowing through the through hole of the PCB together with the connection terminal while a soldering operation is performed on the connection terminal. The extension portion together with the connection terminal is fit and soldered in the through hole of the PCB.
Owner:AMPHENOL COMML INTERCONNECT KOREA
Wheel speed sensor interface control circuit for active electronic brake system
PendingCN110103911AProtect the circuitExtended service lifeElectric/fluid circuitBraking systemsAnodeWorking environment
The invention provides a wheel speed sensor interface control circuit for an active electronic brake system. The wheel speed sensor interface control circuit for the active electronic brake system comprises a power supply switch unit, a high side power supply unit, a control unit, a signal processing unit, a resistor and a low side power supply unit, wherein the power supply switch unit is accessed into a vehicle-mounted power supply; the high side power supply unit is electrically connected with an anode wiring terminal of a wheel speed sensor and the power supply switch unit; the control unit is electrically connected with the power supply switch unit and the high side power supply unit; the signal processing unit is connected between a cathode wiring terminal of the wheel speed sensor and the control unit; the resistor is connected between the cathode wiring terminal of the wheel speed sensor and the low side power supply unit; and the low side power supply unit is further electrically connected with the control unit. According to the wheel speed sensor interface control circuit for the active electronic brake system, the wheel speed sensor can be prevented from working under asevere working environment, the circuit where the wheel speed sensor is arranged is effectively protected, and therefore, the safety and reliability of systems such as ABS and ESC are guaranteed.
Owner:思与行科技(苏州)有限公司
Electronic device and control method thereof
ActiveUS11196244B2Protect the circuitRate of change measurementTwo-part coupling devicesControl cellVoltage variation
Owner:CANON KK
Electromagnetic flow meter
InactiveCN106568485AProtect the circuitTesting/calibration for volume flowVolume/mass flow by electromagnetic flowmetersEngineeringCounter-electromotive force
Owner:TECHCROSS
Voltage triggering hardware locking and unlocking circuit
InactiveCN103326705AProtect the circuitProtect the loadReliability increasing modificationsEngineeringResistor
The invention discloses a voltage triggering hardware locking and unlocking circuit which is formed by a voltage triggering circuit, a state locking circuit and an unlocking circuit. The voltage triggering circuit mainly comprises an audion Q4 and resistors, wherein a base electrode of the Q4 is connected with triggering voltage signals through the resistor R10, a collector electrode of the Q4 is connected with state signals through the resistor R9, and an emitting electrode of the Q4 is connected to the ground. The state locking circuit is formed by an audion Q1, an audion Q3 and a resistor, wherein a base electrode of the Q3 is connected with a collector electrode of the Q1, a collector electrode of the Q3 is connected with the base electrode of the Q4, and the base electrode and the collector electrode of the Q3 are in parallel connection with the resistor R5. The unlocking circuit is formed by an audion Q2 and a resistor, wherein a base electrode of the Q2 is connected with unlocking signals through the resistor R4, an emitting electrode of the Q2 is connected to the ground, and a collector electrode of the Q2 is connected with a base electrode of the Q1. The voltage triggering hardware locking and unlocking circuit is low in using cost, achieves the fact that the signals are rapidly triggered to the sate signals, and provides the unlocking signals.
Owner:ANHUI ACT BLUE ENVIRONMENTAL PROTECTION CO LTD
Circuit capable of preventing reversal of current of operational amplifiers connected in series
InactiveCN103840781AProtect the circuitLimit sizeDifferential amplifiersAmplifier input/output impedence modificationReverse currentPhase reversal
The invention provides a circuit capable of preventing reversal of current of operational amplifiers connected in series. The output end of the operational amplifier U1 is connected with the phase reversal end of the operational amplifier U2 through a resistor R3 and is used as one path of input of the operational amplifier U2. The resistor is connected between the two levels of operational amplifiers in series when the two levels of operational amplifiers are in cascade connection, so that the magnitude of reverse current is effectively limited, and the circuit is protected.
Owner:XIAN WEIZHENG ELECTRONICS SCI & TECH
BOOST direct-current boost short-circuit protection circuit
ActiveCN111725787AProtect the circuitEmergency protective circuit arrangementsPower conversion systemsVoltage amplitudeCircuit protection
The invention discloses a BOOST direct-current boost short-circuit protection circuit. The BOOST direct-current boost short-circuit protection circuit comprises a BOOST module, a switch module connected with the BOOST module, a voltage detection module, a voltage amplitude limiting module, a current acquisition delay module and a state maintenance module, the voltage detection module is connectedwith the switch module and the voltage amplitude limiting module, the current acquisition delay module is connected with the voltage detection module and the state maintenance module. When the input voltage is equal to the output voltage, the switch module can be turned off, so that the output end has no voltage, and the risks of circuit protection, board explosion and combustion are avoided. Andwhen the load is short-circuited, the voltage amplitude limiting module can limit the amplitude of the peak voltage and then enter the BOOST module, so that the BOOST module is protected. And when theload is short-circuited, the BOOST module is closed, so that the BOOST module is protected. The state maintenance module can ensure that the BOOST module is at a low level continuously and is alwaysin a closed state when the output is in a continuous short circuit state.
Owner:广东敏华电器有限公司
Isolated overvoltage protection circuit and lamps
ActiveCN104218520BGuarantee personal safetyProtect the circuitArrangements responsive to excess voltageOvervoltageControl circuit
Owner:OCEANKING DONGGUAN LIGHTING TECH +2
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