47results about How to "Achieve relief" patented technology

The invention discloses a compound seasoning oil and a preparation method thereof, and belongs to the technical field of seasoning production. In view of the current problems including single flavor of commercially available seasoning, requirement of ''quick-frying'' or seasoning in a dish cooking process, and unfavorable effects of deodorization, dissolving grease, and freshening, the present invention provides the compound seasoning oil which comprises a variety of edible oil, integrates multiple oil flavors, meanwhile is assisted with an improved spice formula, not only overcomes the fishy smell of animal oil in the compound edible oil, increases the flavor of the seasoning oil, but also has remarkable effects of deodorization, dissolving grease and freshening in the dish cooking process, thus there is no need to add other spices to flavor or ''quick-fry''.

The invention discloses a ground emitting control device of a solid-liquid powered aircraft; the ground emitting control device consists of a front end device and a rear end device. The front end device is a ground control box, wherein the output port of the front end device is connected with the solid-liquid powered aircraft; the rear end device comprises a host computer and a remote control box, and the remote control on the solid-powered liquid-powered aircraft is realized. The ground emitting control device of the solid-liquid powered aircraft mainly finishes two functions; the first function is the igniting emitting function which relates to pressure increase of storage boxes, ignition of igniter and opening of liquid-path electromagnetic valve, and the other function is emitting safety ensuring function which relates to high-pressure gas release of high-pressure bottles, pressure release of storage boxes and oxidant discharge of storage boxes. The ground emitting control device solves problems of complicated system, poor portability and high cost of traditional ground emitting control devices, the precise control of igniting emitting timing sequence aiming at the characteristics of solid-powered liquid-powered aircraft is realized, and the programming can be carried out in an on-line manner so as to modify igniting emitting timing sequence simply and conveniently.

A cardiology interventional therapy postoperative rehabilitation exercise device comprises a transmission box, wherein a connecting shaft is rotatably connected to the center positions of the inner walls of the left side and the right side of the transmission box, pedals are fixedly connected to the left end and the right end of the connecting shaft respectively, a connecting block is fixedly connected to the front end of the center position of the upper surface of the transmission box, and a first telescopic shaft with the adjustable length is hinged to the inner wall of the connecting block.According to the invention, the first telescopic shaft with the adjustable length and angle is arranged; the application range of the device is expanded; the transmission box and an arm exercising device are arranged, the goal of exercising the legs and the two arms of a patient is achieved; the transmission box is matched with a gear shifting mechanism, so that the waist and the back of the patient can be massaged simultaneously; the gear shifting mechanism is matched with the arm exercising device, the purpose of massaging the back of the patient can be achieved while the arms are exercised, the purpose of relieving the body of the patient in the exercising process of the patient is achieved, the functionality and practicability of the device are improved, and popularization is facilitated.

The invention relates to an accurate quantitative control system and control method for a peristaltic pump. The system comprises a driver, a pump head, a pipeline switching device, a metering pipelineand a discharging pipeline, wherein an elastic hose is arranged in the pump head, and the outlet end of the elastic hose is connected with the pipeline switching device; the driver drives the pump head to operate to pump liquid in the pipeline to the outlet end of the elastic hose; the driver is electrically connected with the pipeline switching device, and capable of controlling the pipeline switching device to switch the outlet end of the elastic hose to communicate with the metering pipeline or the discharging pipeline; and in response to the fact that the driver drives the pump head to operate to a preset starting position, the pipeline switching device is driven to switch the outlet end of the elastic hose from the state of communicating with the discharging pipeline to the state ofcommunicating with the metering pipeline. The accurate quantitative control system for the peristaltic pump realizes precise quantitative conveying of the peristaltic pump, and has the advantages of being simple in structure, high in quantitative accuracy, capable of realizing continuous operation, high in conveying efficiency, low in cost and wide in adaptability.

The invention discloses an outwards-leaked gate valve middle cavity overpressure protection device. The outwards-leaked gate valve middle cavity overpressure protection device comprises an inlet sidemain pipeline communicated with the inlet side of a double-gate-plate gate valve, the side portion of the inlet side main pipeline is provided with a valve front drainage pipeline in a communicated mode, and a drainage valve is arranged on the valve front drainage pipeline; and an overpressure protection system is arranged between the valve front drainage pipeline located on the downstream portionof the drainage valve and a middle cavity of the double-gate-plate gate valve in a communicating mode and is in interactive connection with a DCS controller used for receiving detection signals of the overpressure protection system and capable of controlling the overpressure protection system to operate. According to the outwards-leaked gate valve middle cavity overpressure protection device, itis effectively guaranteed that the double-gate-plate gate valve is not prone to being damaged through the valve front drainage pipeline arranged at the bottom of the inlet side main pipeline in a communicating mode, and the overpressure protection system is arranged between the middle cavity of the double-gate-plate gate valve and the valve front drainage pipeline, so that the pressure of the middle cavity of the double-gate-plate gate valve can be monitored, the purpose of automatic relief of overpressure of the middle cavity of the double-gate-plate gate valve is achieved, and it is guaranteed that double gate plates have the double-sealing effect.

The invention relates to a wind power generation system comprising an energy-storage leakage circuit. The energy-storage leakage circuit is composed of two switching elements each provided with antiparallel diodes, an inductor and a resistor. When the fact that voltage of a direct current bus is greater than set highest voltage is detected, the second switching element in the energy-storage leakage circuit is switched off, the first switching element and a second diode form a buck chopper circuit, and direct-current voltage is lowered after the inductor absorbs surplus energy; when the voltage of the direct current bus drops to allowable lowest voltage, the first switching element is switched off, the second switching element and a first diode form a boost chopper circuit, and energy stored in the inductor is released to assist in restoring a normal value of the voltage of the direct current bus. The switching elements of the energy-storage leakage circuit are subjected to alternate chopper control, energy leakage and voltage stability control of the direct current bus during high voltage ride-through can be achieved, and the voltage of the direct current bus can be assisted in restoring fast after dropping, by releasing the energy from the inductor.

The invention relates to a three-chamber-drying-based cocoon drying machine comprising a cocoon drying chamber, a feeding belt, a bearing box, and a plurality of conveying belts. The cocoon drying chamber is divided into a first-stage cocoon drying chamber, a second-stage cocoon drying chamber, and a third-stage cocoon drying chamber by a first-stage chamber separation board, and a second-stage chamber separation board; and the first-stage cocoon drying chamber, the second-stage cocoon drying chamber, and the third-stage cocoon drying chamber are connected with a first-stage hot blast heater, a second-stage hot blast heater, and a third-stage hot blast heater respectively by respective blast pipes. Hot air board boxes are respectively arranged in the first-stage cocoon drying chamber, the second-stage cocoon drying chamber, and the third-stage cocoon drying chamber; and air-out nozzles are arranged at the sides, facing the conveying belts, of the hot air board boxes. According to the invention, the internal environments of the first-stage cocoon drying chamber, the second-stage cocoon drying chamber, and the third-stage cocoon drying chamber do not influence each other much and the temperature range can be controlled easily. Silkworm cocoons can be dried at three different temperature environments and drying of the silkworm cocoons and reelability of silks can be realized ideally.

The invention discloses an ESD protection circuit and an electronic device. The ESD protection circuit comprises a power supply end; a ground end; a discharge circuit which comprises a clamping transistor and an MOS transistor which are connected in series, wherein the clamping transistor and the MOS transistor are integrated on the same semiconductor substrate and are different in type, and the source electrode and the drain electrode of the clamping transistor are electrically connected with the substrate end and are connected to the power supply end; the grid electrode of the MOS transistoris electrically connected with the substrate end; the first electrode of the MOS transistor is electrically connected with the grid electrode of the clamping transistor, and the second electrode of the MOS transistor is connected with the grounding end; when ESD occurs, the MOS transistor is turned on, and parasitic current between the substrate end of the clamping transistor and the second electrode is formed. According to the scheme of the invention, the leakage current generated by the discharge path can be better prevented, and the quality of the core device is prevented from being influenced.

The present invention provides a method and device for suppressing the ground common mode voltage of an inverter AC cable. Through a control unit, a control signal is generated according to inverter alternating current side voltage. The switch unit disconnects or connects the connection between a discharge unit and a reference ground according to the control signal. Finally, the discharge unit discharges the ground common mode voltage of an inverter AC cable, thus the discharge of the ground common mode voltage of the inverter AC cable is carried out through the discharge unit when the switch unit is switched on. The discharge of the ground common mode voltage of an inverter AC cable is realized in switching off an alternating current switch to maintain without an isolation sampling scheme with high cost and a high device insulation level requirement in the prior art, and the risk of electric shock to maintenance personnel is avoided.

The invention relates to a laser power supply storage energy discharge system, and belongs to the technical field of a laser power supply. The discharge system comprises a power-down detection circuit, a trigger circuit and a discharge circuit, wherein the discharge circuit comprises an electronic switch tube and a depletion resistor which are connected in series, the power-down detection circuit is energized by a laser power source for detecting whether the laser power source is powered on and outputting one low-level signal when the laser power source is powered on, the control end of the electronic switch tube is arranged to at low level, the electronic switch tube is enabled to be at a closed state, the discharge circuit is disconnected, the trigger circuit is used for outputting one high-level signal when the laser power source is powered down, the control end of the electronic switch tube is arranged to be at high level, and the electronic switch tube is enabled to be at a conduction state, i.e., the discharge circuit is unlatched, such that energy in an energy storage device is discharged after the laser power source is powered down. According to the invention, the problem of the stored energy when the laser power source is powered down is solved, the laser engineering applicability and real-time performance are also quite good, and the circuit is simple and is easy to realize.

The invention provides a control method and system for discharging of a vehicle high-voltage system, and relates to the control field. The control method is used for achieving discharging of energy ofthe vehicle high-voltage system, and comprises the steps of sending a power outage instruction, disconnecting a relay according to the power outage instruction, recording the voltage difference of the two ends of the relay and calculating the disconnecting time of the relay, sending the disconnecting instruction of the relay, receiving the disconnecting instruction of the relay and enabling the high-voltage system to actively discharge, and comparing the discharging difference of the two ends of the relay with a preset voltage value to determine whether the high-voltage system discharges successfully or not. The control system comprises a vehicle controller, a battery management system and a motor controller. The control method and system for discharging of the vehicle high-voltage systemsolve the energy discharging problem of the vehicle high-voltage system.

The invention discloses a moisturizing and oxidation resisting type cordyceps facial mask emulsion and a preparation method thereof. The cordyceps facial mask emulsion comprises the following raw materials in parts by weight: 70-80 parts of deionized water, 8-12 parts of cordyceps polysaccharide extract, 7-12 parts of glycerol, 2-3 parts of hyaluronic acid, 0.3- 0.5 part of carbomer, 0.1-0.3 part of allantoin, 0.1-0.3 part of essence and 0.05-0.1 part of methylparaben; and the cordyceps polysaccharide extract is a cordyceps gracilis montag polysaccharide extract, and the anamorph of cordyceps gracilis montag is paraisaria. According to the cordyceps facial mask emulsion prepared by the invention, multiple effects of moisturizing, oxidation resisting, whitening, soothing and the like are achieved by taking intracellular polysaccharide extracted from the cordyceps gracilis montag subjected to submerged fermentation as a main component in the facial mask emulsion and fully utilizing the biological activity of the cordyceps polysaccharide, with various auxiliary materials; and the emulsion has novel ingredients and a good effect, is safe and effective, has no toxic and side effects and has wide market prospects.

The invention discloses a relief device for an onboard power supply lightning protection circuit and a lightning protection power supply. The device comprises a grounding seat mounted on a PCB, a through hole arranged in a power supply shell and a grounding screw, wherein the grounding seat comprises a column body with inner thread and a pair of insertion boards extending out of two sides of the column body and bent downwardly; the grounding screw passes through the through hole and the through hole arranged in the PCB from the bottom of the power supply shell to be connected with the inner thread of the grounding seat, and grounding of the onboard power supply lightning protection circuit is realized. The structure is simply and delicately designed, the size is small, current relief can be effectively realized, the lightning protection performance is high, the cost is saved, and the practicability is strong.

The invention discloses an electrostatic discharge circuit and device. The electrostatic discharge circuit comprises PAD, a PN diode D1, a PN diode D2, an NPN triode Q1 and an NPN triode Q2, wherein apositive pole of the PN diode D1, a negative pole of the PN diode D2, the PAD and collectors of the NPN triode Q1 and the NPN triode Q2 are connected together; both a negative pole of the PN diode D1and an emitter of the NPN triode Q2 are connected to a power supply end VCC; and a positive pole of the PN diode D2 and a negative pole of the NPN triode Q1 are jointly connected to reference groundGND. Compared with the prior art, the electrostatic discharge circuit and device can realize negative charge release between a chip and the power supply end, thereby protecting the chip from being damages. Moreover, the electrostatic discharge circuit and device can be applied to a variety of different situations, and greatly improve the safety factor of the chip.

The invention discloses a frequency converter brake control method and circuit and an air conditioner. A frequency converter is provided with a three-phase inverter bridge connected with bus voltage and a motor. The brake control method comprises the steps of judging whether a motor brake signal is received or not; and if so, entering a brake control mode, wherein the brake control mode comprisesthe steps that lower bridge IGBTs in the three-phase inverter bridge are switched on at the same time, upper bridge IGBTs in the three-phase inverter bridge are switched off at the same time, after the lower bridge IGBTs in the three-phase inverter bridge are switched on at the same time, the actual voltage value of the bus voltage is collected, and the on-off state of the lower bridge IGBTs is dynamically adjusted according to the actual voltage value. According to the invention, electric energy discharge is realized under the condition of not additionally adding a hardware circuit, and the on-off state of the lower bridge IGBT is dynamically controlled according to the sampling signal of the bus voltage in the brake control process, so that the motor braking speed and the rising amplitude of the bus voltage are controlled.

The invention discloses an integrated low-capacitance ESD protection device and a preparation method thereof. The integrated device comprises low-capacitance one-way integrated ESD protection devices of four channels; each channel is composed of a low-capacitance diode D1 and a low-capacitance diode D2 which are connected in series; and the four channels are connected with a low-voltage diode D3 in parallel. The preparation method of the integrated low-capacitance ESD protection device comprises the following steps: preparing a P+ substrate material; carrying out photoetching and arsenic injection and annealing; carrying out epitaxial growth; carrying out photoetching and boron injection and annealing; carrying out photoetching and STI isolation preparation; carrying out photoetching and boron injection and annealing; carrying out photoetching and phosphorus injection and annealing; photoetching contact holes; sputtering metal on the front surface; carrying out photoetching to form a front metal area 10; thinning the back surface; carrying out silver or gold evaporation on the back surface; and forming vacuum alloy. Three chips and the diodes D1, D2 and D3 are integrated on a chip, and the performance requirements of high ESD discharge current, low capacitance and low residual voltage are met at the same time.

The invention discloses a heat-resistant composite antibacterial functional material, which is composed of hollow mesoporous silica and nano silver particles and alpha-ammonia titanium phosphate filled in hollow mesopores of the hollow mesoporous silica, wherein the mass ratio of the nano silver particles to the alpha-ammonia titanium phosphate is 2:5 to 3:7; thealpha-ammonia titanium phosphate isobtained through conventional synthesis by mixing alpha-titanium hydrogen phosphate and ammonia water in a molar ratio of 1:5 to 4:5, in which the H<+> on the -OH group of the titanium hydrogen phosphate layer is replaced by NH<4+>. In the invention, the hollow mesoporous silica is used as a solid carrier, so that the nano silver particles can be dispersed and embedded in the hollow mesopores toachieve the slow release of the active ingredient; and then the alpha-ammonia titanium phosphate wraps the outside of the hollow mesoporous silica loaded with the nano silver particles loaded, therebygreatly improves the heat resistance of the material.

The invention discloses a sealing ring having an ESD protection function. The sealing ring comprises a substrate portion structure and a metal connection structure, wherein the substrate portion structure comprises a first conductive type well region, and first to third doping regions formed on a surface of the well region, wherein the first and second doping regions are both second conductive type heavy doping, the third doping region is first conductive type heavy doping, the first doping region, the first conductive type well region and the second doping region form a bipolar transistor, the metal connection structure comprises two electrode structures, the first electrode structure is electrically connected with the first doping region, the second electrode structure is electrically connected with the second and third doping regions, and a portion between a collector region and a base region of the bipolar transistor is made to be a reverse-biased structure through the voltage applied to the first and second electrode structures. The sealing ring is advantaged in that the ESD protection function is realized, an area of the sealing ring can be effectively utilized to realize an ESD protection structure, the area can be saved, and an integration level is improved.

Disclosed is a pain relieving device for gynecological tumors comprising a transmission box 1, fixing rods are fixedly connected to the centers of the inner walls of the left side and the right side of the transmission box, and pedals are fixedly connected to the left ends and the right ends of the two fixing rods correspondingly; a supporting seat is arranged on the rear side of the transmission box, protection boxes are fixedly connected to the left side and the right side of the upper surface of the supporting seat respectively, a partition plate is arranged in the center of the inner walls of the two protection boxes, and a waist massage device is arranged on the rear side of the partition plate. By arranging the waist massage device and the back massage device, the pain of a patient is greatly relieved, the technical problems in the background technology are solved, the comfort level of the patient is increased, the doctor-seeing experience of the patient is improved, by arranging the transmission box and the arm exercising device, the purpose of exercising the two arms of the patient is achieved. By arranging the exercise device and the massage device, the purpose of relieving the body of the patient in the exercise process of the patient is achieved, rehabilitation of the patient is facilitated, and the application range is widened.

An ESD protection circuit and an electronic device, the ESD protection circuit includes: a power supply terminal; a ground terminal; and different types: the source and drain of the clamping transistor are electrically connected to the substrate terminal, and are connected to the power supply terminal; the gate of the MOS transistor is electrically connected to the substrate terminal; the The first pole of the MOS transistor is electrically connected to the gate of the clamping transistor, and the second pole of the MOS transistor is connected to the ground terminal; wherein, when ESD occurs, the MOS transistor is turned on, forming the A parasitic current between the substrate terminal of the transistor and the second pole is clamped. The solution of the present invention can better prevent the leakage path from generating leakage current and avoid affecting the quality of the core device.

The invention belongs to the technical field of medical acupuncture and moxibustion, and particularly relates to a traditional Chinese medicine acupoint acupuncture and moxibustion treatment device which comprises a handle, a needle groove, a rotating ring and a limiting plate, the needle groove is formed in the handle, the bottom of the handle is sleeved with the rotating ring, two conveying motors work to drive a driving roller to rotate, and under cooperation of a driven roller, a conveying belt is driven to rotate; the silver needle is located on the center shaft of the handle, the handle is held by hand to conduct acupuncture operation, accurate grasping of the silver needle can be achieved, operability of the silver needle is improved, operation errors are reduced, hot steam is output into a trigger ring through electrification of an electric heating plate and a draught fan, and the acupuncture effect is improved. The acupuncture and moxibustion device has the advantages that the skin is relieved, the skin is prevented from being tightened emergently, the silver needle is prevented from penetrating, the comfort degree of acupuncture and moxibustion is improved, the skin is disinfected, the safety of needle application can be guaranteed, and the sanitary level of operation is improved.

The invention provides a thyristor-based alternating current quick switch apparatus and a control method therefor. The alternating current quick switch apparatus comprises a bidirectional switch-on branch used for realizing bidirectional switch-on of the working current of an alternating current circuit, a forced transfer branch used for transferring the current of the alternating current circuitin the bidirectional switch-on branch to the forced transfer branch and reducing the current, transferred to the forced transfer branch, of the alternating current circuit to be a zero point, and a power supply and release branch used for supplying power for a capacitor in the forced transfer branch. According to the technical scheme provided by the invention, the thyristor and a diode are mainlyadopted, so that high counter voltage resistance and current resistance is achieved, and millisecond-level switch-on and switch-off of the alternating current quick switch apparatus are realized, thereby further realizing millisecond-level quick switching of the alternating current circuit, and enabling the switch-on and switch-off operating time to reach 1ms; and in addition, the power supply adopts the alternating current power supply, so that local energy utilization can be realized conveniently, and the installation of the apparatus becomes convenient.

The invention provides an ESD protection structure, comprising: fully depleted silicon-on-insulator, including a silicon substrate, a buried oxide layer and a top layer of silicon from bottom to top; a silicide layer, formed on the upper surface of the buried oxide layer, and formed on the top layer Both sides of silicon; gate oxide layer, formed on the upper surface of the top layer of silicon; isolation layer, formed on the upper surface of part of the silicide layer, and formed on both sides of the gate oxide layer; control gate, formed on part of the gate oxide layer The upper surface; the programmable gate is formed on the upper surface of part of the gate oxide layer and part of the isolation layer adjacent to it, and is formed on both sides of the control gate, wherein there is a distance between the programmable gate and the control gate; the source is formed on The upper surface of the silicide layer on the top silicon side is formed on the side of the isolation layer away from the programmable gate; the drain is formed on the upper surface of the silicide layer on the other side of the top silicon and is formed on the isolation layer away from the programmable gate. side of the programming gate. Through the ESD protection structure provided by the invention, the problem of high static leakage in the existing structure is solved.

The invention relates to the technical field of silicon controlled rectifier electrostatic protection, and particularly relates to a silicon controlled rectifier device applied to electrostatic protection of a deep submicron circuit . In the structure, a first N-type heavily doped region and a first P-type heavily doped region are arranged at the upper part in an N-type well region side by side toform a first blank doped region; a second N-type heavily doped region and a second P-type heavily doped region are arranged at the upper part in the P-type well region side by side to form a second blank doped region; polycrystalline silicon and the first blank doped region have an overlapping region and cover the top of the second blank doped region; and a silicide barrier layer and the first P-type heavily doped region have an overlapping region, and the silicide barrier layer and the polycrystalline silicon have an overlapping region, and the silicide barrier layer also covers a polycrystalline silicon uncovered region in the top of the second blank doped region. According to the invention, the good current limiting capability of the silicide barrier layer is utilized, the capability of the SCR for discharging electrostatic current is improved, the SCR is enabled to have low maintaining voltage, and the electrostatic discharge protection requirement of the deep submicron circuit ismet.

The invention relates to the field of organic matter fertilizers, in particular to a biochar-based organic fertilizer and a preparation method thereof. The biochar-based organic fertilizer is prepared from, by weight, 25-35 parts of biochar, 2-8 parts of rhamnolipid, 5-15 parts of shell powder, 1-3 parts of triacontanol, 0.5-1 part of super absorbent polymer resin fiber and 5-10 parts of carbon enzyme. The biochar organic fertilizer obtained by the invention is rich in nutrition, can improve the organic carbon content of soil, can remarkably improve the water and fertilizer retention performance of the soil, and realizes the release of nutrients, so that the nutrient utilization rate is improved, and the biochar organic fertilizer is environment-friendly; after the obtained biochar is applied, the yield increasing effect is obvious, and by taking corn and wheat planting as an example, compared with a blank control group, the yields are increased by about 21.7% and about 23.1% respectively.

The present invention provides a method and device for determining the parameters of a thyristor-based AC fast switching device. The conduction time of the AC fast switching device is determined according to the trigger delay time of the thyristors in the third thyristor module and the fourth thyristor module in the bidirectional conduction branch, And according to the first-stage off-time and the second-stage off-time, the off-time of the AC fast switching device is determined, so as to realize the determination of the on-time and off-time of the AC fast switching device. The technical solution provided by the present invention can realize the millisecond-level turn-on and turn-off of the AC fast switching device, and then realize the millisecond-level fast switching of the AC line, and the operation time of the turn-on and turn-off can reach 1ms; and the present invention provides The core components in the technical solution are thyristors and diodes, which have a high level of reverse voltage and current resistance; the power supply in the technical solution provided by the present invention uses an AC power supply, which is convenient for local source and installation of the device, and can meet different applications The scene needs.

The present application relates to an energy conversion device and a safety control method thereof, which belong to the field of vehicles and can realize safety control of the energy conversion device. The energy conversion device includes: a first switch module; a motor inverter, the first and second bus terminals of which are respectively connected to the first and second terminals of the battery, and the first switch module controls the connection between the first bus terminal and the first bus terminal of the battery. terminal and / or control the on-off of the second bus terminal and the second terminal of the battery; the motor winding, the first terminal of which is connected to the midpoint terminal of the motor inverter; the second switch module and the first capacitor, both connected in series, the first terminal of the second switch module and the first capacitor connected in series are connected to the second terminal of the motor winding, and the second terminal thereof is connected to the second bus terminal; the method includes: command to control the first switch module to turn off to disconnect the battery from the motor inverter, and to control the motor inverter to discharge energy to the first capacitor when the second switch module is turned on.

The invention provides a high-voltage charge-discharge and leakage circuit integrated topological structure and device for a vehicle and belongs to the technical field of military hybrid special vehicles. The structure comprises six switching tubes, a first capacitor, a second capacitor, a third capacitor, a first inductor, a second inductor and a first resistor; the six switching tubes form an H6-like inverter bridge structure; the third capacitor is connected between the emitter of the first switching tube and the emitter of the third switching tube; the first inductor is connected between the emitter of the third switching tube and the emitter of the fifth switching tube; the third capacitor is connected with at least one first resistor and at least one second inductor in parallel. Three power supply management functions are integrated, and therefore, the size is reduced, the weight is reduced, the space is saved, the complexity of system installation, the complexity of wiring harness connection and the complexity of control logic are reduced, and system reliability is improved.

The invention discloses an over-current protection circuit. A drain of a first field effect transistor is connected with one end of a voltage division circuit and one end of a third resistor and is connected with a drain of a second field effect transistor and the drain of a third field effect transistor through a fourth resistor and a fifth resistor separately; a grid of the third field effect transistor and a source of the third field effect transistor are connected with each other and are simultaneously connected to a power supply; the other end of the voltage division circuit is grounded and the other end of the third resistor is simultaneously connected with a base and a collector of a triode; an emitter of the triode is grounded; the other end of the fourth resistor is connected to a source of the first field effect transistor; the drain of the first field effect transistor is grounded; the grid is connected to an output end of a comparator, an input end of the comparator is connected with the collector of the triode and the other end is connected to the voltage division circuit; and one end of a silicon controlled rectifier is connected to the source of the third field effect transistor and the other end is connected to the grid of the second field effect transistor and grounded. The circuit structure is simple and protection on heavy current can be achieved.

The invention relates to the technical field of silicon controlled rectifier electrostatic protection, and particularly relates to an SOI process silicon controlled rectifier electrostatic discharge protection structure with adjustable maintaining voltage. The structure comprises polycrystalline silicon, an N-type well region, a P-type well region, a silicon film layer, a buried oxide layer and asilicon substrate layer which are stacked, wherein an N-type well region and a P-type well region are adjacently arranged in the silicon film layer along the left-right direction; the top of the N-type well region and the top of the P-type well region are in contact with the bottom of the polycrystalline silicon; a first N-type heavily doped region, a first P-type heavily doped region and an ultra-shallow trench isolation region are sequentially arranged at the upper part of the N-type well region from left to right; and a second N-type heavily doped region and a second P-type heavily doped region are sequentially arranged at the upper part of the P-type well region from left to right. According to the invention, the ultra-shallow trench isolation region is arranged above the N-type well region, and the equivalent resistance on the path from the positive electrode to the negative electrode in the SCR is increased by utilizing the insulation capability of the ultra-shallow trench isolation region, so that the purpose of improving the maintaining voltage of the SCR is achieved, and the electric leakage risk of the SCR is effectively reduced.