43results about How to "Large resistance" patented technology

The invention relates to a pressure sensor, a pressure sensing array and a preparation method thereof. The pressure sensor comprises a first substrate, the upper surface of which is provided with a first sensing electrode; the first pressure-sensitive layer is located on the surface of the first sensing electrode, and the first pressure-sensitive layer is a piezoresistive film with a microphase separation structure and a rough upper surface; the lower surface of the second substrate is provided with a second sensing electrode, and the second sensing electrode and the first sensing electrode are oppositely arranged; the second pressure-sensitive layer is located on the lower surface of the second sensing electrode, the second pressure-sensitive layer is a piezoresistive film with micro-phase separation and a rough lower surface, and the lower surface of the second pressure-sensitive layer is opposite to the upper surface of the first pressure-sensitive layer. The pressure sensor provided by the invention has higher sensitivity under high pressure and thin thickness.

The invention belongs to the technical field of semiconductor devices, and particularly relates to a high-heat-dissipation GaN nanowire radio frequency device and a preparation method thereof.The radio frequency device comprises a heterogeneous bonding substrate, a bonding middle layer, an AlGaN / GaN nanowire (a GaN channel layer, an AlN insertion layer, an AlGaN barrier layer and a GaN cap layer), a passivation layer and an electrode layer, and the electrode layer comprises a source electrode, a gate electrode and a drain electrode; the passivation layer covers the gaps between the nanowires through front deposition, so that the preparation of the high-heat-dissipation nanowire transistor is realized, and the problem that the linearity of the device is reduced due to a self-heating effect is solved; holes are formed in the grid electrode, the thickness of the passivation layer on each nanowire is controlled, equal difference distribution is achieved, the linearity of the device is improved through the transconductance compensation effect, the grid voltage swing of the radio frequency device can be effectively improved, and therefore the available range of the device is greatly widened.

The efficient cleaning system comprises a cleaning box with the section being in a concave shape with an upward opening, the cleaning box is rotationally connected with a rotating shaft and two conveying rollers in a penetrating mode through bearings, the section, located in the cleaning box, of the rotating shaft is in interference fit with a convex roller, and a cleaning mechanism is arranged in the cleaning box; the cleaning mechanism comprises a cavity formed in the bottom wall of the cleaning box, two mixing cavities and two passing grooves in the side wall, the two mixing cavities communicate with the cavity, a sliding plate is slidably connected into the cavity in a sealed mode, and a sliding sleeve is fixedly connected to the cleaning box in a sealed and penetrating mode; one end of the sliding sleeve penetrates and extends into the cavity and is fixedly connected with the upper surface of the sliding plate. The textile cleaning device has the advantages that the textile cleaning effect is better, the efficiency is higher, thread residues and impurities can be prevented from being secondarily attached to the textile, the filter screen can be self-cleaned and monitored, blockage is avoided, and normal operation is guaranteed.

The invention discloses soft tissue high-frequency welding equipment, and belongs to the technical field of surgical operating instruments, the soft tissue high-frequency welding equipment comprises an electrocoagulation pen main body, the electrocoagulation pen main body is connected with an insulating rod, the insulating rod is further provided with a conduction pipeline parallel to a cutter head part, and a temperature sensing unit comprises a hinting structure and a telescopic action structure. The electric resection temperature of the knife head part can be sensed in real time through the action structure in the temperature sensing unit, and when the knife head part is overheated, the action structure can be converted into an extension state from an initial retraction state and triggers the indicating structure to protrude out of the surface of the electrocoagulation pen main body, so that a doctor is reminded to cool the knife head part in time; therefore, in the electric resection operation process of the hypertrophy tonsil and adenoid body of the child, the situation that the scalpel head part is overheated in the long-time continuous state of the operation and burns the tissue of the affected part of the child is effectively avoided, the safety of the soft tissue resection operation of the child is improved, and postoperative recovery and healing of the operative part of the child are facilitated.

The invention discloses a 110kV cross-linked polyethylene insulating material power cable, and relates to the technical field of cables, the 110kV cross-linked polyethylene insulating material power cable comprises a battery cell, the outer side of the battery cell is sleeved with a cross-linked polyethylene insulating layer, the outer side of the cross-linked polyethylene insulating layer is sleeved with an inner uniform-temperature copper foil, the outer side of the inner uniform-temperature copper foil is bonded with an arc-shaped groove plate, the inner side of the arc-shaped groove plate is provided with a filling groove, and the inner side of the arc-shaped groove plate is provided with a filling groove. The inner side of the filling groove is filled with aerogel, a sliding groove plate is clamped to the outer side of the arc-shaped groove plate, and an arc-shaped rod is clamped to the middle of the inner side of the inner sliding groove. According to the friction plate, the brittleness speed of the cross-linked polyethylene insulating layer is effectively slowed down, so that the service life of the cross-linked polyethylene insulating layer is continuously prolonged, a large amount of heat can be generated due to continuous sliding of the friction plate at night, the heat can be continuously conducted to the cross-linked polyethylene insulating layer at the moment, and heat preservation is achieved.

The invention relates to the technical field of dustproof cleaning, in particular to an engineering project site dustproof cleaning device which comprises a shell, the side wall of the shell is fixedly connected with an air pump through a support, and an input pipe of the air pump is fixedly connected with the shell in a penetrating mode; a cleaning mechanism is arranged in the shell and composed of an airflow assembly, a dust falling assembly and a control assembly, the airflow assembly comprises an air channel and a dust falling cavity, the dust falling cavity is formed in the shell and communicated with the outside through the air channel, and an input pipe of the air pump penetrates and extends into the dust falling cavity. The shell is rotationally connected with a rotating shaft in a penetrating mode through a bearing, the dust falling assembly comprises two side cavities and a water cavity, and the side cavities and the water cavity are both formed in the shell. The device disclosed by the invention has the advantages that the device can avoid the severe field environment and the waste of water resources while spraying and settling dust, and meanwhile, the spraying and settling speed can be automatically adjusted, so that the automation degree is higher.

The invention relates to the technical field of over-current protection, and discloses an intelligent over-current protection method for a power supply, which comprises the following steps of: constructing an over-current protection system of a circuit to be protected; when the current current value of the to-be-protected circuit does not exceed the preset current value, the resistance value of the thermistor is temporarily adjusted, and a temporarily adjusted resistance is obtained; analyzing the planned power supply voltage of the to-be-protected circuit in the future time period by using the historical power supply voltage, analyzing the planned circuit load of the to-be-protected circuit in the future time period, and analyzing the planned circuit current of the to-be-protected circuit in the future time period; judging whether the to-be-protected circuit is subjected to circuit overcurrent in a future time period or not; identifying an overcurrent moment when the circuit to be protected may have circuit overcurrent, and performing overcurrent protection processing on the circuit to be protected according to the overcurrent moment to obtain a first overcurrent protection result; and over-current protection processing is performed on the to-be-protected circuit by using the thermistor. According to the invention, the problem that the thermistor cannot completely restrain overcurrent can be solved through preventive overcurrent protection.

The invention relates to a pressure sensor, a pressure sensing array and a preparation method thereof. The pressure sensor includes: a first substrate; the first sensing electrode is positioned on the upper surface of the first substrate; the first insulating layer is located on the surface of the first sensing electrode and comprises a plurality of first microspheres arranged in an array or is a first hollow film layer; the first pressure-sensitive layer is positioned on the surface of the first insulating layer and is filled in a first gap in the first insulating layer; a second substrate over the first substrate; the second sensing electrode is positioned on the lower surface of the second substrate; the second insulating layer is located on the surface of the second sensing electrode, and the second insulating layer comprises a plurality of second microspheres arranged in an array or a second hollow film layer; and the second pressure-sensitive layer is located on the surface of the second insulating layer, and the second gap in the second insulating layer is filled with the second pressure-sensitive layer. The pressure sensor provided by the invention has higher sensitivity under high pressure and thin thickness.

The utility model discloses a motor and electrical equipment, and relates to the technical field of electrical equipment, the motor comprises a stator and a rotor, the stator comprises a stator iron core, the stator iron core comprises a stator yoke part and a plurality of stator tooth parts, and the plurality of stator tooth parts are arranged at intervals along the circumferential direction of the stator yoke part; the rotor comprises a magnetizer and a plurality of permanent magnets, the magnetizer is wound on the periphery of the stator, and the permanent magnets are arranged at intervals in the circumferential direction of the magnetizer; the maximum outer diameter of the rotor is D1, the maximum outer diameter of the stator is D2, the maximum radial thickness of the permanent magnet is H1, the maximum radial thickness of the magnetizer is H2, and the maximum width of the tooth part of the stator is W; the following conditions are satisfied: 71 mm < = D1 < = 75 mm, 0.77 < = D2 / D1 < = 0.82, 0.3 < = H2 / H1 < = 0.5, and 0.23 < = W / (D1-D2) < = 0.27. According to the utility model, by optimizing the size of each part of the motor, the utilization rate of a magnetic circuit is improved, and the efficiency of the motor is improved.

An auxiliary apparatus and a vehicle, which relate to the technical field of automobiles. The auxiliary apparatus includes: a base body having an accommodation cavity, the accommodation cavity having an open end; an auxiliary mechanism (2) disposed in the accommodation cavity; a cover body (3) movably disposed at the open end and movable relative to the open end between an open position and a closed position, the cover body (3) being entirely accommodated in the accommodation cavity when the cover body (3) moves from the closed position toward the open position; and at least one power mechanism disposed in the accommodation cavity, one of the at least one power mechanism being used for driving the auxiliary mechanism (2) to extend and retract through the open end. The auxiliary apparatus can prevent the auxiliary mechanism (2) and the cover body (3) from being extended together, and prevent the auxiliary apparatus from generating large wind resistance and wind noise when it is used.

The invention discloses a magnetic random access memory unit, a magnetic random access memory, a phase inverter and a memory, and the magnetic random access memory unit comprises a substrate; the free layer structure is located on the substrate, the free layer structure comprises one or more layers of stacked structures, the stacked structures comprise a first free layer and a plurality of second free layers which are located in the first free layer and are separated from each other, and the first free layer and the second free layers are made of different materials; the multiple layers of stacked structures are stacked in the direction perpendicular to the surface of the substrate; a tunnel layer on the free layer structure; and the fixed layer is positioned on the tunnel layer. The magnetic random storage unit can be used as a basic unit of a logic device and a memory, so that the logic device and the memory have relatively low power consumption, relatively low working voltage and high-temperature reliability.

This application discloses a heating element, an atomizing module, an atomizer, and an electronic atomizing device. It belongs to the field of aerosol generation technology. In the heating element of this application, by setting the heating wire to alternately connect a first part and a second part, and by having different resistance values ​​for the first and second parts, the temperatures of the first and second parts are different when the heating element is energized. Therefore, the part with higher resistance has a relatively higher temperature, and the part with lower resistance has a relatively lower temperature. Thus, the temperature distribution of the heating wire is also an alternating distribution of high and low temperatures, effectively avoiding high temperatures concentrated in the middle of the heating wire, which would cause excessive heat and carbon buildup at that location. Furthermore, the relatively higher temperature part in the first and second parts can directly transfer the high temperature to the adjacent relatively lower temperature part, thereby improving the heat dissipation effect of the heating element.

The present invention discloses a granulation and forming device for organic fertilizer, including a base, a side panel, a gravity density monitoring component, a barrier-free reverse motion component, an automatic control component, an extrusion component and a cutting component. The bottom of the side panel is fixedly arranged on the base, the bottom of the gravity density monitoring component is fixedly arranged on the base, the bottom of the barrier-free reverse motion component is fixedly arranged on the base, the automatic control component is fixedly arranged on the base, the extrusion component is fixedly arranged on the base, and the cutting component is fixedly arranged on the side panel. The present invention belongs to the technical field of organic fertilizer production, and specifically refers to a granulation and forming device for organic fertilizer; the present invention is provided with a gravity density monitoring component, a barrier-free reverse motion component and an automatic control component, which solves the problem that the granulation and forming device for organic fertilizer currently on the market cannot monitor the density of granular organic fertilizer in real time and cannot automatically adjust the density of granular organic fertilizer.

The application provides a data reading circuit of an MRAM chip, comprising: a to-be-tested storage unit, a first gating transistor connected in series with the to-be-tested storage unit, a reference unit, a second gating transistor connected in series with the reference unit, and a readout amplifier, wherein the reference unit has three optional reference resistance branches, including a working mode branch, a first test mode branch and a second test mode branch, the working mode branch is used for reading data of the to-be-tested storage unit, the first test mode branch is used for screening out fixed failure units and high-resistance state out-of-range failure units with an open-circuit failure type, and the second test mode branch is used for screening out fixed failure units and low-resistance state out-of-range failure units with a short-circuit failure type.

The utility model belongs to the technical field of batteries, and discloses a battery which comprises a shell, a positive pole and a winding battery cell, the positive pole is mounted on the shell and insulated from the shell, the winding battery cell is arranged in the shell and comprises a positive plate, a negative plate and a winding diaphragm, the negative plate wraps the positive plate, and the winding diaphragm wraps the positive plate. And the winding diaphragm is arranged between the positive plate and the negative plate. The outermost side of the wound positive plate is provided with a positive leading-out end, the negative current collecting strip of the negative plate is electrically connected with the shell, and the positive leading-out end is electrically connected with the positive column through the positive current collecting strip. The processing technology of the battery is simple, the strength of the shell can be ensured, a circuit can be timely disconnected from the inside under the condition of external short circuit, and the battery has relatively high safety performance.

The present invention relates to the technical field of overcurrent protection, and discloses a method for intelligent overcurrent protection of a power supply, including: constructing an overcurrent protection system for a circuit to be protected; when the current current value of the circuit to be protected does not exceed a predetermined current value, temporarily adjusting the resistance of a thermistor to obtain a temporary adjustment resistor; using historical power supply voltage to analyze the planned power supply voltage of the circuit to be protected in the future period, analyzing the planned circuit load of the circuit to be protected in the future period, and analyzing the planned circuit current of the circuit to be protected in the future period; judging whether the circuit to be protected will have circuit overcurrent in the future period; identifying the overcurrent moment when the circuit to be protected will have circuit overcurrent, performing overcurrent protection processing on the circuit to be protected according to the overcurrent moment, and obtaining a first overcurrent protection result; performing overcurrent protection processing on the circuit to be protected using a thermistor. The present invention can alleviate the problem that thermistors cannot completely suppress overcurrent through preventive overcurrent protection.

The invention provides a circuit, a circuit board assembly and electronic equipment, and relates to the technical field of electronic equipment, the circuit comprises a switching circuit, a processor, a first storage module and a second storage module; the first end of the switching circuit is used for receiving a switching instruction; the second end of the switching circuit is electrically connected with the first pin of the processor and is used for providing different level signals for the processor; the processor is electrically connected with the first storage module and the second storage module and used for selecting the first storage module or the second storage module as a system disk to be started when different level signals are received, and operating system files are stored in the first storage module and the second storage module. According to the application, the two storage modules in which the operating system files are stored are arranged, and one of the two storage modules is selected as the system disk for starting through switching between the two storage modules, so that the user experience is improved.

The invention provides a method for reducing the damage of a high-resistance structure during the implementation of a through hole process, and the method comprises the steps: 1, providing a substrate, and forming a metal layer and a first etching stop layer which are stacked from bottom to top on the substrate, a first resistance layer, a second etching stop layer, an insulating layer, a second resistance layer, a third etching stop layer and a dielectric layer which are stacked from bottom to top are formed on the portion, located in the high-resistance area, of the first etching stop layer, and a dielectric layer is formed on the portion, located in the non-high-resistance area, of the first etching stop layer; step 2, etching the dielectric layer; step 3, etching the exposed first etching stop layer and the third etching stop layer; fourthly, after a mask layer covering the non-high-resistance area is formed, the second resistance layer is etched; 5, after the insulating layer and the second etching stop layer are etched in sequence, the mask layer is removed; and step 6, filling metal in the formed through hole. The two layers of resistors are connected in parallel, the second layer of resistor serves as a buffer layer in the through hole etching process, and loss of the first layer of resistor is reduced.

The invention relates to a charging control circuit, a light storage system, a photovoltaic system and an energy storage system. The charging control circuit comprises a current detection module and a switch module, a first end of the current detection module and a first end of the switch module are connected with a photovoltaic panel, a second end of the switch module is connected with a load circuit, the second end of the current detection module is grounded, and the current detection module comprises a thermistor; and the switch module is used for conducting a path between the photovoltaic panel and the load circuit and controlling the photovoltaic panel to charge the load circuit under the condition that the output voltage or the output current of the photovoltaic panel meets the starting condition. By adopting the charging control circuit, the starting time can be accurately controlled.

The invention relates to the technical field of electronic devices, in particular to an energy-saving and power-saving device for a relay switch, which comprises a box body, a box cover is hinged on the box body, a power supply assembly is arranged in the box body, the power supply assembly comprises a power supply, a slide rheostat, a rheostat slide block and a wire clamp, and a driving assembly is arranged in the box body. The driving assembly comprises a wire, a low-speed motor, a support, a rotating ring, limiting teeth, a first spring, a tooth block, a swing rod and a stop rod, a resistance adjusting assembly is arranged on the inner wall of the box body and comprises a sliding frame, a fixing cylinder, a telescopic rod and a second spring, and an adjusting assembly is arranged in the box body; according to the electromagnetic relay, when the electromagnetic relay is powered on, large current is supplied to the circuit, so that the electrified coil in the electromagnetic relay can generate enough magnetism to attract the armature, after the armature is attracted, the current in the circuit can be reduced, the armature is kept in the attracted state, meanwhile, the loss of electric energy in the whole circuit is reduced, and the service life of the electromagnetic relay is prolonged. Therefore, the power-saving effect is achieved.

The invention discloses a quiescent current detection circuit and device, and relates to the technical field of current detection. The resistors in the voltage dividing network are sequentially connected between the power supply and the ground in series, and the resistance values of the resistors are sequentially increased in a multiplied manner, so that the wide-range coverage from nA to 1A is realized. And each resistor in the voltage dividing network corresponds to each measuring gear, so that the precision measurement that one measuring range corresponds to one measuring gear is realized. The external pin corresponding to the first end of the voltage division network is connected to the measurer, and the quiescent current of the module to be tested can be judged by testing the voltage corresponding to different current target resistors, the voltage value measured by the measurer, the known resistance value of the voltage division network and the known resistance value of the current sampling circuit. Complicated detection instruments do not need to be adopted, the detection mode and peripheral detection instruments are simple, scene adaptability is high, detection circuit devices are few, cost is low, universality is high, and large-scale application is easy. And the requirements of relatively large measuring range and relatively high sensitivity can be met.

The invention provides a power supply gain control circuit and method and a server, and belongs to the technical field of power supply control. The circuit comprises a first control module, a gain adjusting module and an output loop. The first end of the first control module is used for inputting a power supply detection signal, and the second end of the first control module is connected with the first end of the gain adjustment module; a second end of the gain adjusting module is used for inputting working voltage, a third end of the gain adjusting module is connected with a first input end of the output loop, and a fourth end of the gain adjusting module is connected with a first power supply end of the output loop; the first input end of the output loop is also used for inputting sampling voltage, the second input end of the output loop is grounded, and the output end of the output loop is used for outputting a target control signal. According to the invention, the phase margin and the dynamic current sharing response speed of the power supply loop can be flexibly adjusted by adjusting the magnitude of the feedback resistor according to the actual working condition.

The utility model relates to the technical field of wireless sensor networks, and discloses a data collection device based on an industrial wireless sensor network, which comprises a box body, a side plate, a circuit board, a data receiver, a data processor, a data transmitter, an interface and the like, a thermistor is fixedly connected on the circuit board, an electromagnet is arranged inside the side wall of the box body, and the data receiver is connected with the thermistor. And a movable cavity is formed in the box body. When the temperature inside the data collection device is high, the temperature inside the data collection device can be sensed by the thermistor, the resistance value of the thermistor is reduced along with the rise of the temperature, the current of a circuit where the electromagnet is located is increased, the magnetic force of the electromagnet is increased, and at the moment, the electromagnet adsorbs the sliding plate; after the partition plate slides down, the through holes are opened, air convection is formed between the through holes in the two sides of the box body, and then heat dissipation in the box body is accelerated.

Disclosed are a porous transport layer and a preparation method therefor. The preparation method includes the following steps: S1, machining side-by-side elongated recesses on one side surface of a metal sheet; S2, cutting the metal sheet provided with the elongated recesses into a desired shape; S3, stacking a plurality of cut metal sheets such that adjacent metal sheets are tightly attached and firmly connected to form a metal block having regular pore structures inside; and S4, cutting the metal block along a cross section of the metal block, where the cutting thickness matches the thickness of the desired porous transport layer, and a cut sheet structure with micropores being regularly distributed on the surface is used as the porous transport layer. The present invention can solve the problems that titanium fiber felts in the prior art have poor diversion performance, low contact efficiency and large contact surface resistance.

The present invention discloses a high-temperature integrated armored heater for a green, high-energy, non-toxic thruster for a satellite, and belongs to the technical field of armored heating devices. The integrated armored heater is an annular structure, and the inner wall size matches the size of the catalyst bed. The heater includes three parts: a working section, a transition section, and a lead-out section; the working section is the main heating and heat conduction part, and the working section includes a dual-path heating element, an armored shell, a heating element skeleton, and ceramic powder. The heating element material is a PtRh alloy, which is formed into a spiral heating element by dense winding. The integrated armored heater has two spiral heating elements, including one high-power heating element and one low-power heating element; the rated power of the high-power heating element can reach 30W, and the rated power of the low-power heating element is 3W. When the catalyst bed needs to heat up quickly, the two paths work simultaneously to ensure the bed temperature. When low temperature maintenance is required, only the low-power device works to save energy on the satellite.

The invention discloses a current limiting harmonic elimination device based on flow-sensitive materials, which belongs to the field of current limiting harmonic elimination devices, and includes a power grid, a voltage transformer, a current limiting harmonic elimination device, a trap filter and a measuring instrument connected in sequence; the current limiting harmonic elimination device includes harmonic elimination resistors Ra, Rb, Rc, Rn and a ventilation and heat dissipation shell for integrating the harmonic elimination resistors Ra, Rb, Rc and Rn, wherein the harmonic elimination resistors Ra, Rb and Rc are respectively connected in series to the primary winding of the voltage transformer in the A, B and C three-phase circuits, and the harmonic elimination resistor Rn is connected in series between the primary neutral point of the voltage transformer and the ground; the inlet terminals of the harmonic elimination resistors Ra, Rb and Rc are respectively connected to the primary outlet terminals of the corresponding voltage transformer PT. The invention can quickly and timely discharge the heat generated by the harmonic elimination resistors through the ventilation and heat dissipation shell, and the current limiting harmonic elimination device of the present application can solve the problem of ferromagnetic resonance relative to ground overvoltage and phase-to-phase overvoltage surge current, and effectively avoid the occurrence of PT cabinet burning and fuse blowing accidents.

The invention relates to the technical field of urban road illumination detection, in particular to an urban road illumination detection system and method.The urban road illumination detection system comprises a moving mechanism and a controller, the moving mechanism comprises a supporting plate, a filtering box and a marking box are fixedly connected to the supporting plate, and light-transmitting glass is embedded into the inner sides of the left end and the right end of the filtering box; a photoresistor is fixedly connected to the outer side of the light-transmitting glass on the right side, the photoresistor is arranged in a protective cover fixedly connected to the right end of the filter box, a resistance meter used for obtaining the resistance of the photoresistor is fixedly connected to the filter box, and light on a road firstly enters through the light-transmitting glass at the left end of the filter box and irradiates the photoresistor; smoke particles can suspend in gas in the filter box, the light transmitting effect of the filter box is changed by increasing the smoke particles in the gas in the filter box, the photoresistor works in a sensitive interval when illumination is weak, the resistance change sensitivity of the photoresistor is improved, and therefore the sensitivity and accuracy of detection are improved.

The invention discloses a 110kV cross-linked polyethylene insulation material power cable, which relates to the technical field of cables and comprises an electric core, wherein a cross-linked polyethylene insulation layer is sleeved on the outer side of the electric core, an inner temperature-averaging copper foil is sleeved on the outer side of the cross-linked polyethylene insulation layer, an arc-shaped slot plate is bonded to the outer side of the inner temperature-averaging copper foil, a filling slot is provided on the inner side of the arc-shaped slot plate, the inner side of the filling slot is filled with aerogel, a sliding slot plate is clamped on the outer side of the arc-shaped slot plate, and an arc-shaped rod is clamped at the inner middle position of the inner slide slot. The invention has a scientific and reasonable structure and is safe and convenient to use. The cross-linked polyethylene insulation layer is insulated by dissipating heat through the aerogel, and the embrittlement speed of the cross-linked polyethylene insulation layer is effectively slowed down, thereby continuously extending the service life of the cross-linked polyethylene insulation layer, and a large amount of heat is also generated by the continuous sliding of the friction plate at night, and at this time, the heat is continuously conducted to the cross-linked polyethylene insulation layer, thereby performing heat insulation.

The invention discloses a self-adaptive soft turn-off circuit of a power switch device, and relates to the technical field of electronic circuits, the self-adaptive soft turn-off circuit comprises a turn-off control module, a detection module, an energy storage delay module and a soft turn-off execution module, and the detection module and the energy storage delay module are connected in series and then are connected between a drain electrode and a source electrode of the power switch device. The detection module, the energy storage delay module and the power switch device form a drain-source electrode loop, and the energy storage delay module is controlled to store energy or discharge when a comparison result of drain-source electrode voltage and a preset safety threshold value in the turn-off process of the power switch device. And dynamically adjusting the resistance value of the soft turn-off resistor connected to the grid electrode of the power switch device according to energy storage or discharge, and adjusting the turn-off speed of the power switch device. A control signal is generated through energy storage, the resistance value of a soft turn-off resistor connected into a grid electrode of a power switch device is dynamically adjusted, the turn-off speed of the power switch device is reduced, and therefore voltage spikes are restrained.

A forming method of a magnetic random storage unit comprises the following steps: providing a substrate; a free layer structure is formed on a substrate, the free layer structure comprises one or more layers of stacked structures, each stacked structure comprises a first free layer and a plurality of second free layers which are located in the first free layer and are separated from each other, and the first free layers and the second free layers are made of different materials. The multiple layers of stacked structures are stacked in the direction perpendicular to the surface of the substrate; forming a tunnel layer on the free layer structure; a fixing layer is formed on the tunnel layer. The magnetic random storage unit can be used as a basic unit of a logic device and a memory, so that the logic device and the memory have relatively low power consumption, relatively low working voltage and high-temperature reliability.