935 results about "Thermal resistor" patented technology

The invention provides a micro-integrated temperature control heating semiconductor laser diode and a manufacturing method thereof, which are used for solving the technical problems of lower temperature control precision, more combined devices, higher difficulty of a packaging process and higher cost in the conventional packaged laser diode. The invention provides a micro-integrated temperature-control heating semiconductor laser diode which can accurately control the temperature, is low in cost and can simplify the packaging process, the micro-integrated temperature-control heating semiconductor laser diode comprises a laser chip, the laser chip sequentially comprises a substrate, a first buffer layer, an active layer, a second buffer layer and a passivation layer from bottom to top, and the back surface of the substrate is provided with a negative electrode; two grooves are etched on the passivation layer, and a ridge strip between the two grooves forms a waveguide; and a heating resistor and a thermistor are respectively arranged on two sides of the two grooves. A heating function and a temperature measuring function are integrated on the semiconductor laser by adopting a micro-integration technology, so that the number of used devices is effectively reduced, the packaging volume is reduced, the packaging procedure is simplified, and the packaging cost of the devices is reduced.

The invention discloses a microwave cold noise source fusing TEC temperature control and noise temperature compensation technologies, and belongs to the technical field of microwave radiometer calibration. The device comprises a cold source module, a noise compensation module and a constant-temperature control module, wherein the cold source module generates a low-temperature noise signal through a field-effect tube and a terminal resistor; the noise compensation module detects environment temperature change in real time based on a thermistor and a Wheatstone bridge, drives a noise diode to generate a compensation signal, couples the compensation signal with a cold source noise signal after attenuation, and counteracts noise temperature deviation caused by the environment temperature. The constant temperature control module adopts a platinum resistance sensor and a PID algorithm to control a Peltier element in a closed-loop mode, and accurate adjustment (+ / -0.1 DEG C) is achieved. According to the invention, noise compensation and TEC negative feedback temperature control technologies are combined, so that the noise temperature of the system is stabilized in a range of + / -0.1 K for a long time, the measurement precision and reliability of the microwave radiometer in an outdoor complex environment are remarkably improved, and the method is suitable for scenes of remote sensing detection, unmanned aerial vehicle monitoring and the like.

The invention provides an acquisition circuit, a temperature acquisition method, a circuit system and electronic equipment. The acquisition circuit comprises a first signal acquisition port, a plurality of second signal acquisition ports, a first acquisition unit and a plurality of second acquisition units. Wherein the first acquisition unit comprises a value taking resistor and a first pull-up resistor, the first pull-up resistor is located in the chip, a first reference voltage is connected to a first end of the first pull-up resistor, and a second end of the first pull-up resistor is connected with a first end of the value taking resistor through a first signal acquisition port; the second acquisition unit comprises a second pull-up resistor and a thermistor, the second pull-up resistor is located in the chip, the first end of the second pull-up resistor is connected with the first reference voltage, and the second end of the second pull-up resistor is connected with the first end of the thermistor through a second signal acquisition port. Therefore, the acquisition circuit can realize voltage acquisition of one end of the thermistor by using a simple circuit, so that the acquisition circuit is low in cost and simple in wiring design.

The invention relates to the technical field of gas detection, in particular to a detection circuit based on an NTC thermistor and a heat conduction meter. The detection circuit based on the NTC thermistor comprises a main NTC thermistor which is suspended in air flow; the constant current source circuit is used for providing constant working current for the main NTC thermistor; the detection resistor is arranged between the main NTC thermistor and a ground node; the ADC sampling circuit is used for sampling analog voltages at two ends of the detection resistor into digital signals; the constant temperature adjusting circuit is used for controlling the magnitude of the current output by the constant current source circuit according to the voltage of the main NTC thermistor, so that the main NTC thermistor is kept at the target temperature; the temperature compensation circuit is used for detecting the temperature of the environment where the heat conduction measuring meter is located; and the processing unit is used for determining a detection result according to the digital signal and compensating the detection result according to the environment temperature. According to the detection circuit based on the NTC thermistor, the response speed and the measurement precision of measurement are improved.

The invention discloses a current-to-voltage conversion circuit structure for electroporation delivery. The current-to-voltage conversion circuit structure comprises a current-to-voltage conversion circuit and a voltage-to-pulse conversion circuit. The current-to-voltage circuit converts current signals into voltage through an input signal processing module, high-precision amplification is achieved through an operational amplifier and a feedback network of a signal amplification module, the driving capacity is enhanced through a transistor cascade circuit, and temperature drift is dynamically compensated in combination with a thermistor. The voltage-to-pulse circuit corrects non-linear errors through a resistance network of the linearization processing module, achieves gain adjustment through an operational amplifier and an adjustable resistor, and finally adapts to load changes through a field effect transistor and a negative feedback network. The circuit realizes high conversion precision, wide temperature range stability and load adaptive capability, and is suitable for high-precision scenes such as medical treatment or beauty electroporation, industrial sensing and the like.

The invention provides a battery equalization control method and device, electronic equipment and a storage medium, and is applied to a control chip in a battery equalization circuit, the battery equalization circuit further comprises a plurality of equalization thermistors with heating devices underlaid and equalization MOS tubes correspondingly connected with the equalization thermistors, and when a module cell is charged to a preset first voltage threshold value, the equalization thermistors are electrically connected with the equalization MOS tubes. Acquiring a cell voltage corresponding to each string of cells in the module, and determining a voltage difference value between a maximum value and a minimum value corresponding to the cell voltage; when the voltage difference value is greater than a preset first voltage difference threshold value, controlling the equalization MOS tube to be opened, and performing equalization discharging on the battery cell string with the battery cell voltage greater than a preset second voltage threshold value; and controlling a heating device which is connected with the target battery cell string with the maximum battery cell voltage and is padded below the equalization thermistor to work so as to reduce the resistance value of the equalization thermistor and increase the equalization discharge current corresponding to the target battery cell string. The current distribution of the single batteries can be dynamically adjusted by using the adjustable resistor, and efficient equalization is realized.

The invention relates to the technical field of gas generator sets, in particular to a container type gas generator set which comprises an air cooling heat dissipation mechanism, the air cooling heat dissipation mechanism comprises a plurality of wind wheels used for heat dissipation, center shafts of the wind wheels are fixedly connected with rotating shafts, and the outer walls of the rotating shafts are fixedly sleeved with three concentrically-arranged first gears. When the heating value of a certain generator set is increased, the heating condition of the generator set is monitored through the thermistor, a signal is transmitted to the PLC, the resistance of the thermistor is reduced due to heating of the thermistor, then the second gear is made to move upwards through the self-adaptive adjusting assembly, and the driving motor is controlled to stop running through the PLC. And an electric telescopic rod pushes a driving motor to move forwards so as to drive a second gear to move synchronously, so that the second gear is meshed with a first gear with a relatively small diameter, and the rotating speed of the wind wheel is increased.

The invention relates to a battery thermal runaway monitoring system and method, a vehicle and a computer readable storage medium. The system comprises thermistors, a power supply, a data acquisition module and a processor, a battery comprises a plurality of battery monomers, the surface of each battery monomer is provided with a thermistor, all the thermistors are connected in parallel to form a thermistor loop, one end of the thermistor loop is connected to the positive electrode of the power supply, and the other end of the thermistor loop is connected to a divider resistor. A parallel node formed by connecting the thermistors in parallel is determined as a voltage sampling point of the thermistor loop through connecting the divider resistor to the negative electrode of the power supply; and verifying the sampling voltage of the voltage sampling point at least comprising the thermistor loop and the battery monomer temperature of each battery monomer to obtain a comparison result of the battery parameters, and performing thermal runaway analysis according to the comparison result to determine the thermal runaway data of each battery monomer. By adopting the system, effective and reliable battery thermal runaway monitoring and early-warning battery thermal runaway monitoring can be realized.

The utility model discloses an optical module, comprising an emission driving unit which comprises a level comparator and a thermistor compensation network, the level comparator receives an electric input signal and a reference electric signal, and the thermistor compensation network receives an output signal of the level comparator and comprises a first branch circuit and a second branch circuit which are connected in series, the first branch comprises a positive temperature coefficient thermistor and a fixed resistor which are connected in series and in parallel, and the second branch comprises a negative temperature coefficient thermistor and a fixed resistor which are connected in series and in parallel; the laser is driven by the emission driving unit to output an optical signal; a receiving optical component that receives an optical input signal; and the receiving driving unit receives the signal output by the receiving optical component and outputs an electric signal. The optical module can realize light source temperature characteristic compensation in a wide temperature area.

The utility model belongs to the technical field of new energy automobiles, and particularly discloses a new energy automobile high-pressure liquid heater which comprises a heater body, a thick film heating plate, a heat insulation plate, a cover plate and an overheating protection circuit which are sequentially installed from bottom to top. The overheating protection circuit comprises four thermistors Rt1, Rt2, Rt3 and Rt4, an N-type MOS tube, a relay KJ, a heating resistance wire Rh, a resistor R1, a resistor R2, a resistor R3, a low-voltage direct-current power supply and a high-voltage direct-current power supply. According to the thick film heating plate, the water-drop-shaped turbulent flow columns and the turbulent flow teeth are arranged, so that the heat conduction efficiency and the heat exchange efficiency of the thick film heating plate in liquid are improved, and better convective heat exchange is realized; and the overheating protection circuit is arranged, so that the reliability of the heater during over-temperature protection is improved, and the heater is not only controlled by software.

The present invention specifically relates to a variable-parameter satellite vibration isolator and an isolation method. The vibration isolator includes a thermistor, a metal shell, a resistance wire, a filling polymer, a connector, an upper fixed support, a heat insulation component, a lower fixed support and a wire; the filling polymer, the connector, the upper fixed support and the lower fixed support are all annular structures. The outer surface of the connector is connected to the inner wall of the upper fixed support. The outer wall of the upper fixed support is connected to the inner wall of the upper half of the filling polymer. The outer wall of the lower fixed support is connected to the inner wall of the lower half of the filling polymer. The inner wall of the lower fixed support and the bottom of the connector and the bottom of the upper half of the filling polymer enclose a bolt installation cavity. The outer wall of the filling polymer is provided with a metal shell. A resistance wire is wound around the outside of the metal shell. A heat insulation component is provided outside the resistance wire. The satellite control unit is connected to the thermistor and the resistance wire respectively through two wires.

The invention discloses a gain temperature compensation method and circuit for a Ku-band amplifier, and belongs to the technical field of semiconductor integrated circuits. A Ku wave band power amplifier is formed on the basis of a pHEMT amplification device. A grid temperature compensation bias network is adopted for grid bias of the pHEMT amplifier, and the gain of the amplifier is controlled to fluctuate along with the temperature. According to the fluctuation condition of the gain of the pHEMT amplifier along with the temperature, the resistance value of a temperature compensation resistor in the grid bias network is determined, and the grid bias voltage is divided through the grid temperature compensation resistor. As the resistance value of the thermistor changes along with the temperature, the direct-current voltage output by the grid bias network correspondingly changes along with the temperature, so that the gain is controlled. The problem that the gain of an existing PHEMT technology-based Ku band amplifier changes greatly along with the temperature change is solved, and the situation that the gain of the amplifier is out of tolerance along with the temperature change is avoided. The technical scheme provided by the invention is widely applied to various Ku wave band power amplifiers.

A thermal resistor includes a substrate, a thermistor, a front electrode, a passivation protection layer, and an external protection layer. The thermistor does not include an oxide and is made of a base metal. Therefore, it can reduce the production cost. The passivation protection layer is formed by sputtering, physical vapor deposition, or chemical vapor deposition, in which the passivation protection layer conformally covers a surface of the thermistor and can protect the underlying thermistor.

The present invention discloses a design method for a thermal feedback mechanism energy conversion element chip, comprising at least the following steps: Step S1: preparing a substrate layer; Step S2: forming an insulating layer on the substrate layer; Step S3: placing an energy conversion element and at least one thermistor on the insulating layer; Step S4: establishing a parallel electrical connection between the energy conversion element and the thermistor; and Step S5: monolithically integrating the thermistor into a non-polar, two-terminal device. The thermistor is a thermally coupled resistive switch configured to assume a high-resistance or low-resistance state depending on its sensed temperature, with its high-resistance state resistance being much greater than that of the energy conversion element. The present invention eliminates heat accumulation in the energy conversion element chip through the monolithically integrated thermistor, significantly simplifying the complexity of the pyrotechnic device system and improving system reliability.

According to the invention, measurement errors caused by annual changes of a thermistor are reduced. A gas sensor (1) is provided with: a detection circuit (10) including thermistors (Rd1, Rd2); and a control circuit (20) that controls the connection relationship of the detection circuit (10) and the heater resistors (MH1, MH2). During a gas measurement operation, the control circuit (20) connects the thermistors (Rd1, Rd2) in series and heats the heater resistors (MH1, MH2), thereby generating an output signal (OUT) indicating the concentration of the gas to be measured on the basis of a detection signal appearing at a connection point between the thermistor (Rd1) and the thermistor (Rd2), and during a resistance measurement operation, generating an output signal (OUT) indicating the concentration of the gas to be measured on the basis of a detection signal appearing at a connection point between the thermistor (Rd1) and the thermistor (Rd2). The control circuit (20) measures the resistance value of the thermistor (Rd1) in a state where the series connection of the thermistors (Rd1, Rd2) is released. The control circuit (20) corrects the value of the output signal (OUT) on the basis of the resistance value of the thermistor (Rd1). As a result, measurement errors caused by annual changes in the thermistor are corrected.

A power tool includes a housing, an electric motor disposed within the housing, a first printed circuit board assembly configured to selectively supply electric current to the electric motor, causing the electric motor to activate and drive a tool element, and a battery receptacle configured to support a removable battery pack. The battery receptacle has a battery terminal block electrically connected to the battery pack to supply electrical current to the first printed circuit board assembly. The power tool further includes a second printed circuit board assembly electrically connected between the first printed circuit board assembly and the battery terminal block. The second printed circuit board assembly has a fuse and a thermistor configured to detect a temperature of the fuse.

The utility model relates to the technical field of thermal resistors, in particular to an oil leakage prevention elastic bearing temperature measurement thermal resistor structure which comprises a metal protective shell, a sleeve and a pressing screw, the metal protective shell is fixed at one end of the sleeve, a temperature sensing element is installed in the metal protective shell and connected with a wire, and the wire is connected with the sleeve. A movable thread is arranged between the sleeve and the compression screw, the other end of the sleeve is provided with a joint, the movable thread is in threaded connection with the joint, the wire sequentially penetrates through the sleeve, the movable thread and the compression screw to be exposed out of the compression screw, the wire is sleeved with a spring and a ball sealer, one end of the spring abuts against the movable thread, and the other end of the spring abuts against the interior of the joint; a second containing groove is formed in the end, back to the connector, of the movable thread, the ball sealer is located in the second containing groove, a second inner thread is arranged in the second containing groove, a second outer thread is arranged on the pressing screw, and the pressing screw is in threaded connection with the movable thread. According to the thermal resistance structure, the spring is additionally arranged on the wire in the sleeve, so that the thermal resistance probe has anti-seismic performance.

The utility model provides a battery cell temperature acquisition structure, a battery and electric equipment, and relates to the technical field of batteries. The cell temperature acquisition structure is applied to the battery, the battery comprises at least one cell, and the cell temperature acquisition structure comprises a thermistor, a support frame, a flexible circuit board and a heat conduction assembly. The supporting frame comprises a fixing frame, the fixing frame sleeves the thermistor, the fixing frame and the thermistor are fixed on one side, deviating from the heat conduction assembly, of the flexible circuit board, and one side, deviating from the flexible circuit board, of the supporting frame is directly or indirectly connected with the first position of the battery cell. The heat conduction assembly is fixed to the side, facing the second position of the battery cell, of the flexible circuit board, the heat conduction assembly is connected with the flexible circuit board and the battery cell, and the first position and the second position are spaced. According to the battery cell temperature acquisition structure provided by the embodiment of the invention, the connection reliability between the battery cell temperature acquisition structure and the battery cell can be improved, and the possibility of damage and failure of the thermistor caused by unstable temperature acquisition is reduced.

The invention provides a three-phase low-voltage MOSFET (Metal-Oxide-Semiconductor Field Effect Transistor) packaging integrated power module. A driving assembly, a direct-current bus capacitor and other modules are integrated in an aluminum shell package. The three DBC substrates respectively bear U-phase bridge arms, V-phase bridge arms and W-phase bridge arms, an upper bridge arm and a lower bridge arm of each phase are formed by a plurality of parallel MOSFET chips, drain electrodes of the chips are directly welded to a DBC upper copper layer, grid electrodes of the chips are connected with an upper-layer driving circuit board through copper columns, source electrodes of the chips are led out to a direct-current input terminal or an alternating-current output terminal through bonding wires, and a double-layer conductive structure is formed. A plurality of direct-current bus capacitors which are arranged above the aluminum shell in parallel are adjacently coupled with the DBC substrate, so that low-impedance energy buffering is realized; the alternating current output terminal is sleeved on the current sensor, detects the phase current and outputs the phase current through the signal terminal; and a thermistor is mounted on a copper layer on each DBC to monitor the junction temperature of the chip and provide over-temperature protection. The direct-current input terminal, the alternating-current output terminal, the power terminal and the signal terminal are integrally embedded in the aluminum shell and are directly butted with an external busbar and a controller, and additional sampling and driving boards are not needed.

The utility model discloses a battery temperature self-adaptive passive equalization circuit, and relates to the technical field of battery equalization, the positive and negative electrodes of a battery are connected with a BMS controller, the battery comprises a plurality of battery cells connected in sequence, and an equalization module is connected between each battery cell and the BMS controller. The equalization module comprises a resistor R1, a resistor R2, a nmos tube Q1, a nmos tube Q2, an operational amplifier OPAMP and a thermistor NTC. Wherein the resistor R1 and the nmos tube Q1 are connected to form a first circuit, and the resistor R2, the thermistor NTC and the nmos tube Q2 are sequentially connected to form a second circuit. The first circuit and the second circuit are connected with the positive electrode and the negative electrode of the battery cell, and the operational amplifier OPAMP is connected between the first circuit and the second circuit. According to the invention, the appropriate equalization current can be adaptively adjusted through the temperature feedback of the battery cell, so that the battery cell equalization can achieve a faster and safer equalization effect under the condition that the service life of the battery cell is not affected.

The invention discloses a micro-flow sensing chip based on thermal feedback and digital power distribution and a control method, the chip comprises a microstrip line assembly and an interface circuit which are arranged on a substrate, and the interface circuit comprises an amplifier, a comparator, a controller and a phase inverter; a connection point between the first fixed-value resistor and the fourth thermistor and a connection point between the second fixed-value resistor and the first thermistor are respectively connected with two input ends of an amplifier; the connecting end of the first fixed-value resistor and the second fixed-value resistor is connected with a voltage-stabilized power supply; the output end of the amplifier is connected with the positive input end of the comparator; the output end of the comparator is connected with one connecting end of the controller; the other connecting end of the controller is connected with the input end of the phase inverter and one end of the second thermistor; the output end of the phase inverter is connected with one end of the third thermistor. According to the flow sensing microsystem, the flow sensing chip is connected with the exclusive interface circuit in the thermal feedback mode, the signal stability of the integrated sensing microsystem is enhanced, and the inherent temperature drift problem is solved.

The invention discloses a large-bore high-density joint motor for a humanoid robot, which comprises a stator and a rotor, and is characterized in that the rotor comprises a hollow shaft and magnetic steel surface-mounted on the outer wall of the hollow shaft; the stator comprises a stator core outside the magnetic steel, insulating end plates are arranged at the two ends of the stator core, windings are arranged at the outer ends of the insulating end plates, a leading-out wire is arranged at the outer end of one winding, a thermal resistor is arranged on the winding, and a temperature sensor of the thermal resistor is embedded in the winding; by arranging the thermal resistor on the winding, the temperature can be monitored at any time, so that the load of the motor can be adjusted according to the monitored temperature, the influence on normal operation caused by overhigh temperature rise of the motor is prevented, the diameter of the rotor is increased and the crack ratio is increased by arranging the inner cavity of the hollow shaft into a large inner hole structure and matching the pole slots of the stator and the rotor to adopt 18 slots and 20 poles, and the reliability of the motor is improved. The magnetic conduction thickness of the hollow shaft can be reduced by selecting multiple poles, and the purpose of reducing the weight of the hollow shaft is achieved.

The thermosensitive crystal resonator comprises a base, a quartz wafer and a thermistor, the base comprises a base bottom plate, a base middle plate and a base wall which are sequentially arranged from bottom to top, an inner cavity is defined by the upper end face of the base middle plate and the inner wall of the base wall, an upper end opening of the inner cavity is sealed through an upper cover, and a lower end opening of the inner cavity is sealed through a lower cover. A center through hole is longitudinally formed in the middle of the upper end face of the base middle plate, a thermistor is installed in the center through hole, side edge through holes are formed in the positions, located on the two sides of the center through hole, of the upper end of the base middle plate respectively, embedded blocks are installed in the side edge through holes, a plurality of honeycomb holes are formed in the upper portions of the embedded blocks, and the honeycomb holes are filled with conductive buffer rubber. And the upper ends of the two embedded blocks are connected with a quartz wafer through conductive silver adhesive. By optimizing multiple designs of the base structure, the honeycomb buffer structure, the close-range thermosensitive compensation arrangement structure and the double-sealing structure, temperature compensation precision, stress buffer high efficiency and sealing performance long-term performance are achieved.

The utility model relates to the technical field of new energy batteries, in particular to a CCS integrated busbar integrated with a low-voltage BMS, which comprises a plastic support, an aluminum bar, a circuit board, a connector and a thermistor, a bonding pad of the circuit board is electrically connected with the aluminum bar through welding, the thermistor is electrically connected with the circuit board through welding, and the thermistor is in contact with the aluminum bar; the LED lamp further comprises a low-voltage BMS, the low-voltage BMS is integrated on the circuit board and electrically connected with the circuit board, and the circuit board is electrically connected with an external high-voltage BMS through a connector. According to the scheme, the low-voltage BMS is directly integrated into the front-end signal acquisition circuit board, so that the integration level of the device is improved, the assembly space is saved, and the cost is saved.

The invention provides a motor driver and a heat dissipation system thereof. The motor driver comprises a driving board, and the driving board is provided with a motor driving circuit, a temperature detection circuit, a power supply circuit and a main control chip. The power supply circuit is connected with the motor driving circuit and the main control chip and provides a working power supply; the motor driving circuit comprises a driving chip and MOS tubes, the input end of the driving chip is connected with the PWM output end of the main control chip, the output end of the driving chip is connected with the grid electrodes of the MOS tubes, and the drain electrode of the lower MOS tube and the source electrode of the upper MOS tube are connected into a motor three-phase driving loop; the temperature detection circuit comprises a thermistor which is arranged on the driving board and is connected in series with the fixed resistor to form a voltage division circuit, and a voltage division node is connected to an ADC interface of the main control chip; the main control chip collects voltage values at the two ends of the thermistor through the ADC interface and calculates a temperature value according to the collected voltage values; and when the temperature value exceeds a set threshold value, the main control chip stops outputting the PWM signal to the driving chip so that the motor stops rotating.

The invention provides a flexible high-energy laser sensing film sensor. The flexible high-energy laser sensing film sensor comprises a sensing film and a laser high-reflection film layer on the surface of the sensing film. The sensing film is composed of a flexible substrate, an upper surface transition layer, a lower surface transition layer, an upper surface thermistor layer, a lower surface thermistor layer, an upper surface lead layer, a lower surface lead layer, an upper surface protection layer and a lower surface protection layer. The thin film type double-sided resistor array is used for monitoring the laser irradiation transient thermal effect in real time, the laser detection threshold value is increased in combination with the laser high-reflection film layer, and rapid and accurate measurement of laser irradiation parameters such as laser power density, light spot size and irradiation position can be achieved; the device solves the problem that the existing devices such as a laser power meter and a laser spot analyzer are limited in light sensing diameter and are difficult to be suitable for large-spot-size laser parameter measurement and laser sensing alarm, and has the advantages of flexibility, large area, simple structure, low cost and the like.

The invention relates to the technical field of detection circuits suitable for various electricity utilization information acquisition terminals, and discloses a detection circuit method suitable for various electricity utilization information acquisition terminals. The method comprises the following steps: setting an environment temperature, calibrating a shunt resistor and a thermistor, constructing a three-order resistance-temperature mapping relation, and calculating thermal resistance and thermal response characteristics to realize accurate modeling; a thermistor is attached to a shunt resistor, heat-conducting silicone grease is added to form a thermal coupling structure, voltage is collected through a constant current source and a differential amplifier, a resistance value is converted into temperature in real time, instantaneous current is inversely calculated based on a heat balance equation, then energy integration and grade judgment is completed, and various electrical parameter indexes are output. According to the method, modeling, collection, conversion and inversion processes are integrated, a complete thermal-electric detection link is constructed, a traditional current sensor is not needed, and the method has the advantages of being compact in structure, low in cost, flexible in deployment and the like and is suitable for a low-power-consumption distributed terminal.

The utility model relates to the technical field of circuit design, in particular to an optimized power-on current suppression circuit, a voltage dependent resistor RV1, a safety capacitor CX1 and a discharge resistor are connected in parallel between a live wire L and a zero line N. The voltage dependent resistor RV1 is located at the rear end of a fuse F1, the safety capacitor CX1 is located at the rear end of the voltage dependent resistor RV1, the discharge resistor is located at the rear end of the safety capacitor CX1, and the discharge resistor is located at the rear end of the safety capacitor CX1. The rear end of the discharge resistor is connected with a common mode inductor L1, the rear end of the common mode inductor L1 is connected with a rectifier bridge DB1, the rear end of the rectifier bridge DB1 is connected with a rectification filter electrolytic capacitor EC1, a first capacitor C1 and a second capacitor C2 are connected in parallel between the live wire L and the null line N, and the live wire L is connected in series with an NTC thermistor RT1. Compared with the prior art, the optimized energizing current suppression circuit not only can suppress energizing impact current, but also can improve EMC / EMI effects of the circuit.

An adaptive gate drive circuit for an insulated gate bridge transistor, IGBT, based semiconductor switch provides a gate resistance device for reducing timing delays and switching losses associated with an increase in switch junction temperature. The gate resistance device is disposed close to the switch junction and including a negative temperature coefficient, NTC, thermistor and linear gate resistor connected in parallel. When the thermistor senses an increase in the junction temperature of the semiconductor switch, gate resistance via the linear gate resistor is reduced to bring the junction temperature back to thermal equilibrium with minimal delay, allowing the semiconductor switch to switch faster and reducing associated switching losses.

The invention relates to the technical field of electric leakage detection, in particular to a mobile phone wire harness electric leakage detection device which comprises a detection mechanism, the detection mechanism comprises a plurality of long-strip thermistors used for detecting whether a wire harness leaks electricity or not, and the top ends of the long-strip thermistors are in sliding contact with first conducting strips; and the top end of the first conductive sheet is fixedly connected with an insulating block. When a certain position of the wire harness leaks electricity, the position generates heat, the long-strip thermistor senses temperature rise, the resistance value of the long-strip thermistor changes correspondingly, the current in the detection loop also changes, the current detection module in the PLC captures the change, and then the insulation block is controlled to drive the first conducting strip to slide on the long-strip thermistor. Resistance values of different areas are measured by changing contact positions, when the first conducting strip is in contact with an electric leakage part, the resistance value reaches a peak value, at the moment, the PLC records the position and determines the electric leakage position of the wire harness, and accurate positioning of the electric leakage position is ensured in the process.