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55 results about "Sensistor" patented technology
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Sensistor is a Resistor whose resistance changes with temperature. The resistance increases exponentially with temperature, that is the temperature coefficient is positive (e.g. 0.7% per degree Celsius).
Electrically-operated temperature-regulated scented wax warmer
InactiveUS20050016985A1Efficiently transfer heatImprove thermal conductivityRespiratorsHand ironContact padEngineering
An electrically operated scented wax holder that forms a receptacle for receiving unmelted blocks of wax which are heated to the melting point and thereafter maintained at a safe temperature by a temperature-regulated electrical heating element. The wax receptacle is removable mounted on a base section that houses a positive temperature coefficient (PTC) thermistor which has a transition temperature substantially higher than the melting point of the wax to insure that the wax is rapidly melted, but substantially below the temperature that would constitute a danger to a human who might touch the exterior surface of the warmer, or constitute a fire hazard. The heating element is preferably placed in thermal contact with a contact pad having high thermal conductivity that is in turn placed closely adjacent to the wax receptacle, thereby efficiently transferring heat from the electrically operated temperature regulated heating element to the wax in the receptacle. A switch is positioned to de-energize the heating element whenever the wax receptacle is removed from the base section, and a visible pilot light is illuminated whenever the heating element is energized.
Owner:HAAS RODNEY +1
Positive temperature coefficient material and thermistor containing the material and preparation method therefore
ActiveCN101465185AImprove stabilityGood resistance stability at room temperaturePositive temperature coefficient thermistorsRoom temperatureHeat sensitive
Disclosed are a positive temperature coefficient material, a preparation method thereof, a positive temperature coefficient thermistor including the positive temperature coefficient material and a preparation method thereof. The material is a product formed by a mixture through melting; the mixture comprises resin, conductive filling, non-conductive filling, promoter and cross-linking agent, wherein, the mixture also comprises additives; and the additives are selected from silicon dichloride, sodium fluoride and carbon tetrachloride. The positive temperature coefficient material is provided with good stability and the output power of the positive temperature coefficient material is slowly attenuated along with the increase of the switching movement times, so that the thermistor prepared with the positive temperature coefficient material is provided with good room temperature resistance stability and PTC intensity stability after the thermistor is frequently used.
Owner:BYD CO LTD
Method and apparatus for providing an indication of the composition of a fluid particularly useful in heat pumps and vaporizers
A method and apparatus for providing an indication of the composition of an examined fluid by using an electrical resistor, particularly a positive temperature coefficient thermistor, for measuring the thermal conductivity of the examined fluid with the known thermal conductivity of different fluid compositions. The method and apparatus are particularly described for indicating the relative proportions of a working fluid in the liquid and vapor phases in one or more stages of a heat pump. Another described application is for indicating the liquid level in a liquid vaporizer.
Owner:A T C T ADVANCED THERMAL CHIP TECH
Device and method for biological safety detection, control and alarm
The invention discloses a biosecurity detecting, controlling and warning device and method, which comprises a shell forming air passage, at least a filter, an air inlet and an air outlet. The invention also comprises: at least a wind speed sensor, at least a pressure difference sensor, at least a wind speed transducer, at least a pressure difference transducer, a data processor, a monitor, a warner and a blower. The filter is a high-efficiency filter, the wind speed sensor is a hot-bulb wind speed sensor, the pressure difference sensor is sensistor micropressure difference sensor, the wind speed transducer is a hot-bulb balanced breeze speed transducer, the pressure difference is sensistor resistivity balanced micropressure transducer and the data processor is CPU or MPU data processor. The method can be used on the above device. The invention can accurately detect the failure, damage of the filter (HEPA or ULPA) and accurately alarm, which can also conduct automatic supplementing and controlling.
Owner:上海智城分析仪器制造有限公司
Motor, motor having encoder, and multi-direction input device
ActiveUS20050258691A1Efficient use ofShorten the lengthTelevision system detailsSynchronous generatorsRotational axisElectric machine
A motor includes a casing and a holder which support a rotation shaft. A concave groove is formed in the holder near the inner periphery of the holder. The concave groove accommodates a positive temperature coefficient thermistor functioning as an overcurrent protection device. A tapered cutout surface is formed on the outer wall of the holder so that the cutout surface is inclined at 45 degrees with respect to a line passing through the rotation shaft and the groove portion of the holder has a maximum length of the holder in its axis direction. A multi-direction input device includes these two motors functioning as driving sources to provide a force feedback to an operation lever. The first and second motors are disposed such that lines passing through their rotation shafts are orthogonal to each other and cutout surfaces are opposed to each other with an intersection of the lines therebetween.
Owner:ALPS ALPINE CO LTD
Macromolecular positive temperature coefficient thermosensitive resistor and manufacturing method thereof
InactiveCN101556849AImprove yieldUniform resistance at room temperatureNon-conductive material with dispersed conductive materialPositive temperature coefficient thermistorsElectrical resistance and conductanceProcedure Agents
The invention relates to a macromolecular positive temperature coefficient thermosensitive resistor which comprises a sheet core, metal foils adhering on two sides of the sheet core, and sheet or lead-shaped metal electrodes welded on outer surfaces of the metal foils; the core is blended by macromolecule polymer, conductive fillings, inorganic fillings and processing material which are distributed according to weight percentage as follows: 35-65% of macromolecule polymer, 35-65% of conductive fillings, 0-20% of inorganic fillings and 0.1-5% of processing material. The invention is characterized in that the macromolecular positive temperature coefficient thermosensitive resistor has low cost; ball grinder pre-mixing process is employed in the technique to improve evenness of room-temperature resistance value of the macromolecular positive temperature coefficient thermosensitive resistor and uniformity of resistance lift after performing current resisting, voltage resisting and the like, thereby improving rate of pass of the product.
Owner:SHANGHAI CHANGYUAN WAYON CIRCUIT PROTECTION CO LTD
Microwave sintering method for thermal resistor with positive temperature coefficient and its special device
InactiveCN101154485AIncrease productivityImprove uniformityResistor manufacturePositive temperature coefficient thermistorsFiberHigh rate
A microwave sintering method of posiode and special hardware belong to the preparation method field of electronic heating element. The microwave sintering method comprises the following art procedures: a posiode green ware body of the series of barium titanate made by the prior art is placed into a crucible and a sintering special thermal insulator, and then the whole is placed into a micro-wave oven to sinter; the sintering procedure is that the speed of temperature rise is controlled between 5 degrees per minute and 100 degrees per minute, after the temperature is up to 1100 degrees to 1300 degrees, the whole is kept at a constant temperature for 5 to 60 minutes, and then the whole is cooled down to the room temperature at the cooling rate of 3 to 30 degrees per minute; the special hardware is a sintering special thermal insulator arranged in the micro-wave oven body, the sintering special thermal insulator comprises a fibre thermal insulator in the outer layer and a thermal insulator in the sub outer layer; a fibre insulation ball packed layer is arranged between the thermal insulator in the sub outer layer and the crucible in the inner layer. The invention is of short cycle of sintering art, good quality of products and high rate of finished products, thereby improving the production benefit and saving energy sources.
Owner:SHENZHEN JINKE SPECIAL MATERIALS CO LTD
Method for manufacturing thermosetting positive temperature coefficient thermistor and conductive adhesive therewith
InactiveCN101728038ALow room temperature resistivityImprove consistencyPositive temperature coefficient thermistorsEpoxy resin adhesivesEpoxyMetal foil
The invention relates to a method for manufacturing a thermosetting positive temperature coefficient thermistor and conductive adhesive therewith. The method comprises the following steps of: coating conductive adhesive on one side of a metal foil, eliminating solvent by roasting for 120-600 seconds at 120-200 DEG C to obtain a conductive semi-solid sheet, and controlling the gelation time of the semi-solid sheet at 170 DEG C hot plate / 70-110 seconds; oppositely superposing and sticking two semi-solid sheets with the same size at the conductive adhesive coating surfaces and carrying out hot pressing and full solidifying to form a solid sheet; and cutting the solid sheet into chips with proper size, welding conductive pins on the surfaces of the metal foils of the chips to obtain the thermosetting positive temperature coefficient thermistor. The method induces a semi-solid sheet manufacturing procedure, so that the controllability of semi-solid epoxide resin is enhanced, and finished product with low electrical resistivity, good uniformity and excellent reliability can be obtained by combining semi-solidifying degree and the hot press process.
Owner:SHANGHAI CHANGYUAN WAYON CIRCUIT PROTECTION CO LTD
Apparatus and method for temperature-dependent transient blocking
ActiveUS20060104004A1Emergency protective arrangement detailsEmergency protective arrangements for automatic disconnectionTemperature controlNegative temperature
An apparatus and method for temperature-dependent transient blocking employing a transient blocking unit (TBU) that uses at least one depletion mode n-channel device interconnected with at least one depletion mode p-channel device. The interconnection is performed such that a transient alters a bias voltage Vp of the p-channel device and a bias voltage Vn of the n-channel device in concert to effectuate their mutual switch off to block the transient. The apparatus has a temperature control unit that is in communication with the TBU and adjusts at least one of the bias voltages Vp, Vn in response to a sensed temperature Ts, thereby enabling the apparatus to also respond to over-temperature. In some embodiments the p-channel device is replaced with a positive temperature coefficient thermistor (PTC). The temperature control unit can use any suitable circuit element, including, among other a PTC, resistor, negative temperature coefficient element, positive temperature coefficient element, transistor, diode.
Owner:BOURNS INC
Apparatus and method for temperature-dependent transient blocking
ActiveUS7369387B2Emergency protective arrangement detailsEmergency protective arrangements for automatic disconnectionTemperature controlHemt circuits
An apparatus and method for temperature-dependent transient blocking employing a transient blocking unit (TBU) that uses at least one depletion mode n-channel device interconnected with at least one depletion mode p-channel device. The interconnection is performed such that a transient alters a bias voltage Vp of the p-channel device and a bias voltage Vn of the n-channel device in concert to effectuate their mutual switch off to block the transient. The apparatus has a temperature control unit that is in communication with the TBU and adjusts at least one of the bias voltages Vp, Vn in response to a sensed temperature Ts, thereby enabling the apparatus to also respond to over-temperature. In some embodiments the p-channel device is replaced with a positive temperature coefficient thermistor (PTC). The temperature control unit can use any suitable circuit element, including, among other a PTC, resistor, negative temperature coefficient element, positive temperature coefficient element, transistor, diode.
Owner:BOURNS INC
Semiconductor ceramic and positive temperature coefficient thermistor
ActiveUS20110234364A1Extension of timeImprove reliabilityCurrent responsive resistorsConductive materialRare-earth elementSensistor
A semiconductor ceramic includes a BamTiO3-based composition, as a main component, having a perovskite structure represented by general formula AmBO3, wherein part of Ba constituting the A site is replaced with Na, Bi, Ca, and a rare-earth element having an ionic radius smaller than that of the Na; the content of the rare-earth element when the total number of moles of the elements constituting the A site is 1 mole is 0.0005 to 0.015 on a molar basis; and the content of the Ca when the total number of moles of the elements constituting the A site is 1 mole is 0.05 to 0.20 (preferably 0.125 or more and 0.175 or less) on a molar basis. A PTC thermistor includes a component body 1 formed of the semiconductor ceramic. Accordingly, high reliability is achieved even if an alkali metal element is present.
Owner:MURATA MFG CO LTD
A method to fabricate high resistance value polysilicon resistance in high voltage IC
ActiveCN1964019AStable resistanceExcellent in-plane uniformitySemiconductor/solid-state device manufacturingHigh resistanceElectrical resistance and conductance
The disclosed manufacture method for high-resistance multicrystal sensistor in high-voltage IC comprises: using the non-silicatized in-situ doped-arsenic multicrystal grid material as the resistance element; etching the high-resistance area and the grid; finally, taking the thermal process after material sedimentation. This invention can obtain 1000omega block resistance element.
Owner:SHANGHAI HUAHONG GRACE SEMICON MFG CORP
Compressor starting circuit and refrigerator
PendingCN106953552ASolve power consumptionZero power consumptionPolyphase induction motor starterThermodynamicsIcebox
The invention provides a compressor starting circuit which comprises a positive temperature coefficient thermistor PTC, a bidirectional thyristor TR1, a triggering circuit and a control circuit, wherein the positive temperature coefficient thermistor PTC is connected with a T1 end of the bidirectional thyristor TR1; the positive temperature coefficient thermistor PTC and a G end of the bidirectional thyristor TR1 are respectively connected with the triggering circuit; and the triggering circuit and a T2 end of the bidirectional thyristor TR1 are respectively connected with the control circuit. The invention further provides a refrigerator. The compressor starting circuit and the refrigerator which are provided by the invention have the beneficial effects of solving the problem of power consumption of the starting circuit after a compressor of the refrigerator is started up, and implementing zero power consumption.
Owner:SHENZHEN ZHENBANG TECH
Semiconductor ceramic and positive temperature coefficient thermistor
ActiveUS20110215894A1Improve reliabilitySuppress mutationNon-metal conductorsLayered productsRare-earth elementSensistor
A semiconductor ceramic includes a BamTiO3-based composition, as a main component, having a perovskite structure represented by general formula AmBO3. The molar ratio m between the A site and the B site satisfies 1.001≦m≦1.01. Part of Ba constituting the A site is replaced with Bi, Ca, a rare-earth element, and Na. The molar content of the Ca when the total number of moles of the elements constituting the A site is 1 mole is 0.05 to 0.20 (preferably 0.125 to 0.175). A PTC thermistor includes a component body formed of the semiconductor ceramic. Accordingly, there is provided a lead-free semiconductor ceramic that substantially does not contain lead and that has desired PTC characteristics and high reliability.
Owner:MURATA MFG CO LTD
Production technology of exciter coil
InactiveCN101847484AImprove insulation performanceImprove temperature resistanceCoils manufactureCoilsPolyesterInsulation layer
The invention relates to a production technology of an exciter coil. The production technology comprises the following steps: 1) using NMN composite insulation paper to cover an insulation layer outside the stainless steel pipe of an exciter, binding one layer of mica tape outside NMN, tightly binding a heat-shrinkable belt to the outside of the mica tape; 2) binding 5-15 layers of polyester inferior amine lacquered wires outside the heat-shrinkable belt, wherein one layer of imine film is placed between each two adjacent polyester inferior amine lacquered wires and one layer of alkali-free glass tape is covered outside the outermost polyester inferior amine lacquered wires; 3) distributing three sections of coils outside the stainless steel pipe of the exciter, electrically connecting the coils in series, sleeving varnished cloth pipes outside the series wires of the coils, placing a sensistor on the outer layer of the middle coil to obtain a semi-finished product; and 4) soaking the entire semi-finished product in ET-90A insulating varnish once, wherein varnish is avoided to enter in the stainless steel pipe of the exciter during soaking. The prepared product has good insulating property, excellent electrical properties and long service life.
Owner:金群力
Preparation method of high-Tc low-resistance lead-free PTC material
The invention relates to a preparation method of a lead-free positive temperature coefficient thermistor ceramic with high Curie temperature, high lift-drag ratio and low room temperature resistivitysintered in an atmosphere. According to the method, the following formula is adopted: and x(Bi1 / 2Na1 / 2)TiO3-yCaTiO3-(1-x-y) BaTiO3+aLi2CO3+bSb2O3 powder; wherein x ranges from 0.01 mol% to 0.12 mol%,y ranges from 0 mol% to 0.20 mol%, a ranges from 0 mol% to 0.5 mol%, b ranges from 0 mol% to 0.20 mol%, and one or more of Nb2O5, La2O3, Sm2O3 and Nd2O3 compounds are semiconducting agents, and Al2O3and TiO2 are sintering aids. According to the adopted process, a wafer pressed by the materials is sintered for 10-30 minutes at the temperature of 1250-1380 DEG C in the air atmosphere, so that the wafer is fully sintered, and a solid-phase reaction is realized; and the surface of the sintered wafer is ground, and an electrode is loaded to prepare the PTCR ceramic material. The room-temperature resistivity of the ceramic material is as low as 30 ohm.cm, the Curie temperature Tc is as high as 155 DEG C, and the lift-drag ratio is as high as 106 or above.
Owner:江苏钧瓷科技有限公司
Optical module
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.
Owner:HISENSE & JONHON OPTICAL ELECTRICAL TECH CO LTD
Electric appliance protector provided with positive temperature coefficient thermistor
ActiveCN102103915BStop the flowResistor terminals/electrodesPositive temperature coefficient thermistorsSensistorPositive temperature
Owner:CHANGSHU TIANYN ELECTROMECHANICAL
Semiconductor ceramic, and positive temperature coefficient thermistor
ActiveCN103459350AImprove pressure resistancePositive temperature coefficient thermistorsElectrical resistance and conductanceMetallurgy
The purpose of the present invention is to provide: a semiconductor ceramic having excellent pressure resistance; and a positive temperature coefficient thermistor element produced using the semiconductor ceramic. A semiconductor ceramic, which constitutes a component base (11) of a positive temperature coefficient thermistor element (1), contains a compound represented by the general formula (Ba1-(x+y+z) / 100Cax / 100Sry / 100Smcz / 100)TiO3 (wherein Smc represents an agent capable of making materials semiconductive) as the main component, and is characterized in that Mn is contained in an amount of t part by mole relative to 100 parts by mole of the main component, x, y and t fulfill the relationship represented by the formulae 2.500 <= x <= 20.000, 0.000 <= y <= 5.000, 2.500 <= x+y <= 20.000 and 0.030 <= t <= 0.150, and z is equal to or greater than an amount of the agent for making materials semiconductive (Smc) at which the specific resistance becomes minimum in a curve that is defined by x, y and t and shows the relationship between the amount of the agent for making materials semiconductive (Smc) and the specific resistivity.
Owner:MURATA MFG CO LTD
Polymer-based positive temperature coefficient thermistor composite material and preparation method and application thereof
ActiveCN112825277ARegulating the starting temperatureElectrode carriers/collectorsPositive temperature coefficient thermistorsSafety testingLithium-ion battery
The invention provides a polymer-based positive temperature coefficient thermistor composite material and a preparation method and application thereof. The polymer-based positive temperature coefficient thermistor composite material comprises a polymer matrix and a conductive agent, wherein the mass ratio of the polymer matrix to the conductive agent is 1: 40-1: 1. By adjusting the content of the monomer in the composite material, the initial action temperature of the PPTC safety electrode is regulated and controlled. The invention also provides a lithium ion battery based on the PPTC safety electrode, and the lithium ion battery can completely pass a safety test. According to the method disclosed by the invention, the initial action temperature of the PPTC material can be adjusted according to actual requirements, and exemplarily, the melting point temperature of PVDF is about 160 DEG C under general conditions, and according to the method disclosed by the invention, the initial action temperature of the PVDF-based PPTC material can be adjusted to 110-150 DEG C.
Owner:ZHUHAI COSMX BATTERY CO LTD
Server BIOS flash memory chip protection circuit and server
PendingCN113448422APlay a protective effectNo need to replace repeatedlyPower supply for data processingBIOSSensistor
The invention discloses a server BIOS flash memory chip protection circuit and a server. The circuit comprises a chip slot, the chip slot is provided with a power supply pin position and a grounding pin position, and the grounding pin position is grounded; a BIOS (Basic Input / Output System) flash memory chip, wherein the BIOS flash memory chip is inserted into the chip slot; a positive temperature coefficient thermistor, the first end of the positive temperature coefficient thermistor is connected with a power supply, and the second end of the positive temperature coefficient thermistor is connected with the power supply pin so as to supply power to the BIOS flash memory chip through the positive temperature coefficient thermistor. According to the scheme, the positive temperature coefficient thermistor is connected in series between the power supply pin of the chip slot and the power supply, so that overcurrent protection is realized when the BIOS flash memory chip is short-circuited, the BIOS flash memory chip is protected, the positive temperature coefficient thermistor does not need to be replaced repeatedly, the structure is simple, and excessive layout space is not occupied.
Owner:SHANDONG YINGXIN COMP TECH CO LTD
Device and method for biological safety detection, control and alarm
The invention discloses a biosecurity detecting, controlling and warning device and method, which comprises a shell forming air passage, at least a filter, an air inlet and an air outlet. The invention also comprises: at least a wind speed sensor, at least a pressure difference sensor, at least a wind speed transducer, at least a pressure difference transducer, a data processor, a monitor, a warner and a blower. The filter is a high-efficiency filter, the wind speed sensor is a hot-bulb wind speed sensor, the pressure difference sensor is sensistor micropressure difference sensor, the wind speed transducer is a hot-bulb balanced breeze speed transducer, the pressure difference is sensistor resistivity balanced micropressure transducer and the data processor is CPU or MPU data processor. The method can be used on the above device. The invention can accurately detect the failure, damage of the filter (HEPA or ULPA) and accurately alarm, which can also conduct automatic supplementing and controlling.
Owner:上海智城分析仪器制造有限公司
Electric appliance protector provided with positive temperature coefficient thermistor
ActiveCN102103915AStop the flowResistor terminals/electrodesPositive temperature coefficient thermistorsEngineeringSensistor
The invention discloses an electric appliance protector provided with a positive temperature coefficient thermistor, belonging to the technical field of electronic product protectors. The electric appliance protector comprises a positive temperature coefficient thermistor, a first pin and a second pin, wherein the positive temperature coefficient thermistor is provided with a first electrode surface and a second electrode surface; the first pin is provided with a pair of first elastic strips, corresponds to the first electrode surface and is in contact with the first electrode surface through the first elastic strips; and the second pin is provided with a pair of second elastic strips, corresponds to the second electrode surface, and is in contact with the second electrode surface through the second elastic strips. The electric appliance protector is characterized in that the first elastic strips and the second elastic strips are crossed. The electric appliance protector has the advantages that: when the positive temperature coefficient thermistor cracks in the longitudinal direction, the transverse direction, the longitudinal and transverse direction or in any other direction, the fragments of the positive temperature coefficient thermistor can offset to form a non-conductive open circuit in time so as to effectively prevent current from passing through and achieve a remarkable active effect on electric protection.
Owner:CHANGSHU TIANYN ELECTROMECHANICAL
Method for producing multiple leading-out terminal positive temperature coeffient PTC thermistor
InactiveCN1555067AKeep the current constantConstant currentPositive temperature coefficient thermistorsElectrical resistance and conductanceEngineering
This invention relates to a process method for a positive temperature coefficient resistor (PTCR) with multiple lead-out ends and its products used in over current, over voltage and over temperature protection elements of electronic circuits. This invented product has three or more electrode regions outgoing three or more than three lead-out ends realizing almost stable current under different environment temperatures for a thermistor and different hold currents under a definite temperature.
Owner:SHANGHAI CHANGYUAN WAYON CIRCUIT PROTECTION CO LTD
A kind of positive temperature coefficient thermistor material and preparation method thereof
ActiveCN103964839BLower room temperature resistanceSmall grainAlkaline earth titanatesResistor manufacturePhysical chemistryEngineering
A thermistor material and a method for preparing a thermistor material are provided. The thermistor material is prepared by mixing and heating a mixture containing BaTiO3, B2O3, SiO2, Li2O, P2O5, Cs2O, Nd2O3, Al2O3 and TiO2.
Owner:BYD CO LTD
Composite positive temperature coefficient thermistor material and preparation method thereof
PendingCN114678177ALow room temperature resistivityImprove the lift-to-drag ratioResistor manufacturePositive temperature coefficient thermistorsAnilineSensistor
Owner:TIANJIN RUIKEN NEW MATERIAL TECH
A method to fabricate high resistance value polysilicon resistance in high voltage IC
InactiveCN100490121CStable resistanceImprove in-plane uniformitySemiconductor/solid-state device manufacturingHigh resistanceElectrical resistance and conductance
The disclosed manufacture method for high-resistance multicrystal sensistor in high-voltage IC comprises: using the non-silicatized in-situ doped-arsenic multicrystal grid material as the resistance element; etching the high-resistance area and the grid; finally, taking the thermal process after material sedimentation. This invention can obtain 1000omega block resistance element.
Owner:SHANGHAI HUAHONG GRACE SEMICON MFG CORP
Current collector, battery and electric equipment
The utility model discloses a current collector, a battery and electric equipment. The current collector comprises a base material layer, a conductive layer and a positive temperature coefficient thermistor layer. In the first direction, the base material layer comprises a first surface and a second surface; the conductive layer is arranged on at least one of the first surface and the second surface, and the conductive layer comprises a first end and a second end in the second direction; the positive temperature coefficient thermistor layer is arranged on at least one side, in the first direction, of the conductive layer and makes contact with the conductive layer, the length of the positive temperature coefficient thermistor layer extends from the first end to the second end, and in the third direction, the width of the positive temperature coefficient thermistor layer is smaller than that of the conductive layer. The problem that when the thinned copper foil is used as the current collector, the current collector is likely to generate an overflowing phenomenon is solved.
Owner:YIBIN JINMEI NEW MATERIAL TECHNOLOGY CO LTD
Airflow velocity measuring apparatus and airflow rate measuring apparatus
ActiveUS11243223B2Easy to manufactureReduce manufacturing costVolume/mass flow measurementThermometers using electric/magnetic elementsEngineeringPulse voltage
An airflow velocity measuring apparatus that includes a fixed-temperature heat generating device. The fixed-temperature heat generating device includes a power supply, a positive-temperature-coefficient thermistor element, a switching element, a comparator element, a first negative-temperature-coefficient thermistor element, a second negative-temperature-coefficient thermistor element, and plural resistor elements. The positive-temperature-coefficient thermistor element is disposed at a measuring point at which the velocity of airflow is measured. The switching element is repeatedly turned ON and OFF so as to cause the positive-temperature-coefficient thermistor element to generate heat at a preset temperature, thereby applying a pulse voltage from the power supply to the positive-temperature-coefficient thermistor element. The airflow velocity measuring apparatus measures the velocity of airflow at the measuring point based on the waveform of this pulse voltage. Adding of a second switch makes it possible to correct measurement errors caused by a rise or a fall in the temperature of subject airflow.
Owner:MURATA MFG CO LTD
A simulation analysis method and device for protection characteristics of power supply circuit of electric energy meter
ActiveCN108254712BHigh precisionElectrical measurementsElectrical resistance and conductanceThermodynamics
The invention discloses a method and a device for the simulation and analysis of the protection characteristic of the power circuit of an electric energy meter. The method comprises the following steps: obtaining the change of the resistance of a positive temperature coefficient thermistor in a pressure-sensitive and heat-sensitive composite resistor in the power circuit of an electric energy meter with temperature, and analyzing the dispersity of the Curie temperature at the positive temperature coefficient thermistor; measuring the electrical parameters of the transformer in the power circuit of the electric energy meter, substituting the obtained electrical parameters into a circuit simulation model and carrying out simulation to obtain the loss power of the transformer, and analyzing the dispersity of the loss power of the transformer; loading the loss power into a thermal simulation model, setting a limit condition as the thermal simulation condition, and carrying out thermal simulation to obtain the temperature distribution at the positive temperature coefficient thermistor under the limit condition; drawing a dispersity curve of the Curie temperature at the positive temperature coefficient thermistor and a curve of the influence of the loss power change of the transformer under the limit condition on the temperature of the thermistor; and analyzing the protection characteristic of the power circuit of the electric energy meter according to the two curves.
Owner:ELECTRIC POWER RES INST STATE GRID JIBEI ELECTRIC POWER COMPANY +5