187results about "Other resistor networks" patented technology

The utility model relates to the technical field of lightning arresters, and discloses a lightning arrester with an on-off function, which comprises a lightning arrester shell and a bottom plate, the lightning arrester shell is fixedly mounted on the outer wall of the top of the bottom plate, a lightning arrester conductive core is mounted on the inner side of the lightning arrester shell, an on-off guide rod is arranged on the inner side of the lightning arrester shell, and the bottom plate is fixedly mounted on the bottom plate. The top end of the on-off guide rod is electrically connected with the bottom end of the lightning arrester conductive core, an insulating sealing plate is fixedly arranged at the bottom end of the on-off guide rod, a limiting groove is formed in the outer wall of the middle of the bottom of the bottom plate, and the insulating sealing plate is arranged on the inner wall of the limiting groove in a sliding mode. According to the utility model, the insulating sealing plate is pulled down to drive the on-off guide rod to move downwards, and the on-off guide rod continuously moves downwards in the movable hole until the on-off guide rod completely moves to the outer side of the lightning arrester shell, so that the disconnection work of the conductive core of the lightning arrester and the on-off guide rod can be realized, the operation is convenient, the lightning arrester can be prevented from bearing overvoltage, and the service life of the lightning arrester is prolonged. The device is practical and suitable for being widely popularized and used.

The invention relates to the technical field of resistors, in particular to a high-performance heat dissipation load unit which comprises an air duct, a motor fixed to the air duct, a rotating shaft installed on an output shaft of the motor, a supporting disc fixed to the rotating shaft and a plurality of supporting fan blades fixed to the supporting disc in a spaced mode in the circumferential direction. The air duct is provided with an external liquid groove, and the outer end part of each supporting fan blade is provided with an external leading-out terminal inserted into the external liquid groove; the air duct is provided with an internal liquid receiving groove; an inner leading-out terminal inserted into the inner liquid receiving groove is arranged at the inner end part of each supporting fan blade; the supporting fan blades are insulators, and the two ends of the resistance wire of each supporting fan blade are connected with the outer leading-out terminal and the inner leading-out terminal of the corresponding supporting fan blade respectively, so that the resistance wires are electrically conducted through the conductive liquid. Compared with an existing load, the heat dissipation effect is good, the wind resistance is low, and the requirement for a draught fan is lowered. Whether the group of resistance wires are used or not can be adjusted by changing whether the external leading-out terminals are immersed into the conductive liquid in the external liquid tank or not, so that the power of the whole resistor unit can be adjusted.

The invention discloses an umbrella skirt used for a lightning arrester and an insulator and having a passive deicing function and a preparation method thereof.The umbrella skirt used for the lightning arrester and the insulator and having the passive deicing function comprises solid mixed silicone rubber and silicone rubber wrapping the outer surface of the solid mixed silicone rubber and having the passive deicing function; the silicone rubber with the passive deicing function comprises the following components: a silicone rubber-based material, a soft substance with low shear modulus and an inorganic filler, the adhesive force between the silicone rubber and ice is low (less than 100 kPa), the interface of the silicone rubber and the ice is very easy to separate due to stress concentration, and the passive deicing effect is achieved; the deicing function of the silicone rubber has a volume characteristic, cannot be lost due to damage to the surface of a material, has the service life equal to the service life of the material, and has a wide application prospect in the field of icing prevention and control.

To provide a resistance element and a resistor capable of reducing the peeling force generated at a welding point where an end of a resistance wire is welded to a cap terminal.SOLUTION: A resistance element 2 includes a resistor 21 having a columnar main body portion 211 and a pair of attached portions 213 located on both sides of the longitudinal direction of the main body portion 211, a pair of cap terminals 22 respectively attached to the pair of attached portions 213, and a resistance wire 24 wound around the outer peripheral surface of the main body portion 211, the cap terminal 22 has a weldable region 222 to which an end 242 of the resistance wire 24 is welded, there is a height difference between the weldable region 222 and the outer peripheral surface of the main body portion 211, and an intermediate portion 214a is provided between the main body portion 211 and one of the cap terminals 22a, and when viewed from the front, the outer peripheral surface of the intermediate portion 214a coincides with the outer peripheral surface of the attached portion 213.SELECTED DRAWING: Figure 3

The invention relates to the technical field of intelligent resistor control, and discloses a self-adaptive temperature compensation intelligent resistor system and a control method, and the system comprises a sensor module, a temperature compensation module, a self-adaptive control module, an electromagnetic shielding structure and a power management module. By applying an advanced temperature compensation algorithm, a reasonable electromagnetic shielding design, an intelligent self-adaptive control strategy and a perfect self-diagnosis function, the stability problem caused by the fact that a traditional resistance system is affected by environmental interference and element aging is effectively solved. According to the system, the resistance drift can be controlled to be + / -0.05% within the temperature range of-40 DEG C to 125 DEG C; in the aspect of electromagnetic interference suppression, the signal-to-noise ratio can be increased by 30dB; and the element aging compensation rate exceeds 90%.

An apparatus is provided. The apparatus includes a first resistor stack having a first temperature coefficient. The apparatus also includes a second resistor stack coupled to the first resistor stack having a second temperature coefficient different than the first temperature coefficient. The apparatus further includes a measurement circuit associated configured to determine a temperature of the apparatus based on a differential between a first voltage across the first resistor stack and a second voltage across the second resistor stack and determine a set of resistances of a field-effect transistor (FET) that is coupled to the apparatus based on additional differentials between additional voltages across the first resistor stack and the second resistor stack.

A die 10A implementing an integrated circuit 20A comprises: a substrate; a plurality of electronic devices integrated on the substrate and interconnected to form at least a portion of an electronic ci

The invention relates to the technical field of rail transit vehicle power supply protection, in particular to a vehicle-mounted lightning arrester which comprises a body, a base, a sealing cavity, a flow guide passage and a restraint mechanism, and when pressure in the sealing cavity reaches the opening condition of a pressure relief opening and under the action of directional jet flow formed by a jet opening, the body is separated from a limiting piece; and the rotating shaft rotates towards the off-position direction around the rotating supporting part. According to the application, destructive voltage breakdown is taken as an action power source, gas is generated and rapidly expanded due to electric arc during breakdown of the sealing cavity in the body, after the cavity pressure rises to a set threshold value, the pressure relief opening with the pressure opening characteristic is selectively opened, and expanded gas is directionally discharged from the spraying opening along the flow guide passage; the offset of the spraying port relative to the rotary supporting part converts the spraying momentum into a dumping moment to the body, so that the body is quickly and certainly switched to the off position from the working position under the condition of no additional operation, the electric connection interruption with the high-voltage conductor is formed, and the risk of secondary pressurization of the reclosing is reduced.

The application provides a double-row lead frame resistance. The double-row lead frame resistance comprises a lead frame, a resistance, and the two ends of the first coil and the second coil are respectively installed with the lead wires; a protective cover; a cooling mechanism, the inside of the protective cover is fixedly connected with the supporting rod, the bottom end of the supporting rod is installed with the air bag; the top end of the supporting rod is internally installed with the fixed block and the fixed frame, the inside of the fixed block is slidably connected with the piston, the inside of the piston and the fixed block is respectively installed with the magnetic ring, the magnetic rings are attracted to each other; the inside of the fixed frame is slidably connected with the sliding rod, the sliding rod is fixedly connected with the piston, the side wall of the sliding rod is sleeved with the spring, and the two ends of the spring are respectively connected with the fixed frame and the piston; a cooling mechanism; a connecting mechanism. The double-row lead frame resistance provided by the application has the advantages of eliminating the self-induction of the coil, reducing the eddy current, and facilitating the dissipation of the heat inside the coil.

The invention provides a resistor element and a resistor, which can alleviate peeling force generated at a welding part where an end part of a resistance wire is welded to a cover terminal. A resistive element (2) is provided with: a resistor (21) having a columnar main body section (211) and a pair of sections to be mounted (213) positioned on both sides of the main body section (211) in the longitudinal direction; a pair of cover terminals (22) respectively attached to the pair of attachment sections (213); and a resistance wire (24) wound around the outer peripheral surface of the main body part (211), the cover terminal (22) has a weldable region (222), an end part (242) of the resistance wire (24) is welded to the weldable region (222), there is a height difference between the weldable region (222) and the outer peripheral surface of the main body part (211), and an intermediate part (214a) is provided between the main body part (211) and one cover terminal (22a). The outer peripheral surface of the intermediate section (214a) coincides with the outer peripheral surface of the mounted section (213).

The application relates to an overcurrent-preventing resistor, which comprises a shell and a resistance coil, the bottom of the shell is internally provided with a bobbin and externally provided with a first pin and a second pin, the resistance coil is electrically connected to the first pin and the second pin, the resistance coil is sleeved on the bobbin and electrically insulated from the bobbin, the bobbin is internally provided with a magnetic piece, the magnetic piece is in sliding connection with the bobbin, the magnetic poles of the magnetic piece are distributed along the axis of the bobbin, the magnetic piece is electrically connected with the bobbin, the top of the inside of the shell is provided with an electric contact opposite to the bobbin, the top of the outside of the shell is provided with an indicating lamp electrically connected with the electric contact, and the inside of the shell is provided with a wire for electrically connecting the second pin. The application has the functions of quickly determining overcurrent in a laboratory and giving a warning.

The utility model discloses a thermal protection type piezoresistor which comprises a piezoresistor body, the two sides of the piezoresistor body are electrically connected with a first wire pin and a second wire pin respectively, and one side of the piezoresistor body is further connected with a third wire pin. The third lead pin is electrically connected with the second lead pin through a thermal fuse, and the thermal fuse is of a tubular structure. According to the thermal protection type piezoresistor, compared with a hard shell design, the overall size and the shell cost are reduced; and compared with an explosion-proof coating design, the risk that the coating bursts after the thermal fuse is subjected to high-temperature hot melting is avoided.

The utility model provides an electronic device capable of adjusting resistance, which belongs to the technical field of rheostats and comprises two mounting seats and a plurality of wiring components arranged on the mounting seats, and mounting sleeves are mounted on the outer walls of one sides of the mounting seats. According to the utility model, the lamp bead arranged on the wiring assembly is conducted when the position is wired, the path of current is judged by judging the lightening position of the lamp bead, meanwhile, when the sliding block is moved to adjust the resistance value of the resistor, the change of the resistance value can be intuitively reflected through the brightness of the lamp bead, and meanwhile, the direction of the current can be judged; according to the utility model, students can intuitively judge the current direction when the slide rheostat demonstrates and the current change when the slide rheostat changes, the teaching efficiency is improved, the arranged sliding sleeve is matched with the positioning sleeve to protect and fix the wire clamp in the process of conducting the lamp bead by wiring, the wire clamp connection position is prevented from loosening in the demonstration process, and the teaching quality is improved. Therefore, the stability of the demonstration process is improved.

The invention provides a lightning arrester core fixed based on an insulating rod and an assembly method thereof, which are used for solving various problems of a traditional metal oxide lightning arrester core. According to the lightning arrester core body fixed based on the insulating rods, the first groove and the second groove are matched and clamped with the Y-shaped clamping heads at the two ends of the insulating rods, and the core body is fixed through the plurality of insulating rods, so that the additional arrangement of structures such as an insulating cylinder is avoided, and the volume of the lightning arrester core body is reduced; meanwhile, the axial displacement of the insulating rod in the assembling and using processes is effectively avoided, so that the close contact among a plurality of resistor discs is ensured; compared with the prior art, the resistor discs pressed in a Y-shaped clamping mode are higher in stability, the plurality of resistor discs are in closer contact and do not generate gaps, and when the outer sides of the resistor discs are directly wrapped with the rubber jackets, rubber is not prone to permeating into the space between every two adjacent resistor discs.

The invention relates to the technical field of lightning arresters, and discloses a vehicle direct current lightning arrester with a built-in separation device, the vehicle direct current lightning arrester comprises an outer sleeve and a core body, the core body comprises an insulating tube, an electrode is arranged in the insulating tube, the electrode divides the interior of the insulating tube into an upper cavity and a lower cavity, the upper cavity is provided with a functional module, the functional module is used for realizing an overvoltage protection function, and the lower cavity is provided with a power supply. A separating device is arranged in the lower cavity and located on the upper portion of the lower cavity, a connecting hole communicated with the lower cavity is formed in the core body, a grounding end is arranged in the connecting hole, and the grounding end is connected with the separating device; according to the lightning arrester, when the insulating property of the upper cavity is completely lost due to a short-circuit fault, the accurate and reliable action of the separating device of the lower cavity can still be ensured when the fault occurs, the disconnection of a circuit is realized, the insulating property of the lower cavity can be kept after the action, and the risk of a secondary fault is avoided; as the disengagement device is limited in the lightning arrester, the adverse effect of scattered objects generated when the external disengagement device acts on the vehicle can be avoided.

The present invention provides an alloy resistor stamping device, a resistor production process and an alloy resistor. The alloy resistor stamping device includes an upper die and a lower die. The lower die is provided with a main body forming area, a lead forming area, a blanking area and a plurality of guide pins. A plurality of main body sheaths are arranged in the main body forming area, a plurality of lead sheaths are arranged in the lead forming area, and a plurality of cutting sheaths are arranged in the blanking area. Knife edges are formed on the main body sheaths, the lead sheaths and the cutting sheaths, and a floating top is arranged inside. The floating top includes a contact block and a spring; the upper die is provided with a main body cutting knife, a lead cutting knife and a side material cutting knife; when the upper die and the lower die are closed, the above-mentioned cutting knives extend into the corresponding sheaths and contact the contact blocks inside the sheaths. The lead cutting knife includes a first tool and a second tool. This can avoid lead shedding and position deviation, improve the quality of the alloy resistor, and reduce the defective rate in the production process of the alloy resistor.

The utility model discloses a thermistor, which belongs to the technical field of resistors, and comprises a shell, a resistor body positioned in the shell, a conductive strip and a thermal expansion displacement mechanism, one end of the thermal expansion displacement mechanism is fixedly connected with the resistor body, the resistor body is connected with two pins extending out of the shell, at least one pin comprises two separated parts, and the two parts are connected with the conductive strip. The first conductive section is fixedly connected with the resistor body, and the second conductive section is fixedly connected with the shell; the conductive strip is simultaneously connected with the first conductive section and the second conductive section in a conductive state; the conductive strip is separated from the first conductive section or the second conductive section to be in a power-off state; the free end of the thermal expansion displacement mechanism is in linkage with the conductive strip and used for triggering the conductive strip to be switched from the conductive state to the power-off state. According to the utility model, the thermistor is protected in an over-temperature power-off mode, the structure is simple, the cost is low, and the control is more accurate.

The invention relates to the technical field of resistors, in particular to a high-voltage constant-power water-cooling load resistor unit and a manufacturing method thereof.The high-voltage constant-power water-cooling load resistor unit comprises an insulated supporting pipe and a plurality of resistor modules, and the two ends of the supporting pipe penetrate through to form a heat dissipation channel; a plurality of limiting grooves are formed in the inner wall of the supporting pipe, and the resistor modules are inserted into the limiting grooves from ports of the supporting pipe in a one-to-one correspondence mode. Each resistor module comprises a plurality of resistor blocks which are arranged at intervals and a conductive strip which is used for positioning the plurality of resistor blocks and is connected in series. Compared with the prior art, the inner pipe formed by high-pressure blow molding is adopted, the pipe wall of the inner pipe is very thin, heat of the resistor can be easily dissipated into water, and the heat dissipation performance is good. The plurality of resistor modules are arranged at the limiting grooves in the inner wall of the supporting tube, so that more resistor modules can be accommodated, different numbers of resistor modules can be electrically connected according to requirements during use, and the use is more flexible; and when a local resistor module has a fault, the corresponding resistor module can be conveniently replaced.

To miniaturize a plane shape of a strain gauge having four resistance parts constituting a Wheatstone bridge circuit.SOLUTION: A strain gauge includes a resin flexible base material, and a resistor, wherein the resistor includes a first functional layer formed from metal, an alloy or a metallic compound directly on one surface of the base material, a first resistance part and a second resistance part which are formed from a film containing Cr, CrN and Cr2N and contain α-Cr as a main component, directly on one surface of the first functional layer, a second functional layer formed from metal, an alloy or a metallic compound directly on the other surface of the base material, and a third resistance part and a fourth resistance part which are formed from a film containing Cr, CrN and Cr2N and contain α-Cr as a main component, directly on one surface of the second functional layer, wherein the first functional layer and the second functional layer have a function for promoting crystal growth of α-Cr and film-forming the film containing α-Cr as a main component, and the first resistance part, the second resistance part, the third resistance part and the fourth resistance part constitute a Wheatstone bridge circuit.SELECTED DRAWING: Figure 3

A high-power direct-current load cooling method based on variable modular combination comprises the steps that a high-power load is divided into a plurality of resistor modules, resistor load bodies of the resistor modules are sealed and then placed in an independent cooling water tank, and then the independent cooling water tank is placed on a supporting frame in an overall resistor cabinet; the water inlets and the water outlets of the independent cooling water tanks are arranged in series according to a thermal sequence through cooling water pipes to form independent cooling water tank groups, cooling water sequentially flows through all the independent cooling water tanks, heat of the resistor modules in the independent cooling water tanks is taken away in a layered mode, and cooling and heat dissipation are conducted on resistor loads of the resistor modules. High-power direct-current loads are modularized and then are respectively arranged in the independent water-cooling box bodies, and all the independent water-cooling box bodies are connected in series through the cooling water pipes, so that cooling water flows through each independent water-cooling box body according to a rule, and cooling of each resistor module can be effectively controlled; the high-power direct-current load can be well cooled in various selection modes.

The invention provides a laminated resistor and a manufacturing method thereof, and aims to realize a miniaturized and low-cost NTC (Negative Temperature Coefficient) thermistor. The method comprises the steps of film layer preparation, laser trepanning, electrode slurry printing, lamination pressing, vertical cutting, sintering, electroplating and the like. Holes are formed in the substrate through the laser ablation technology, electrode slurry is filled in the holes, interlayer connection is achieved, a traditional end sticking technology is omitted, the production process is simplified, and cost is reduced. And cutting to form a terminal electrode and a bottom electrode, sintering to form a compact ceramic structure, and finally electroplating to obtain a finished product. The laminated resistor and the manufacturing method thereof are suitable for manufacturing resistors with smaller sizes, and the production efficiency and the product performance are improved.

The utility model discloses an anti-surge current safety device which comprises a box body, the box body is provided with an accommodating groove, a box cover is arranged at the opening of the accommodating groove, and the box cover and the box body are enclosed to form an accommodating space; a fuse link and an NTC thermistor are arranged in the accommodating space; the fuse link is spiral, one end of the fuse link is connected with one end of the NTC thermistor, and the other end of the fuse link penetrates through the box cover outwards to form a first connecting end of the current safety device; the other end of the NTC thermistor penetrates through the box cover outwards to form a second connecting end of the current safety device; the fuse link and the NTC thermistor are integrated in the box body, so that the space in the box body can be fully utilized, the occupied space of the fuse link and the NTC thermistor is saved, the circuit design of a product is simplified, and the fuse can be suitable for application scenes with compact space; and meanwhile, by arranging the spiral fuse link, the surge current can be further inhibited, so that the product circuit is effectively protected.

In one example, an apparatus comprise: a first power stage having a first power stage input and a first power stage output; a second power stage having a second power stage input and a second power stage output; a driver circuit having a first driver input, a second driver input, a first driver output, and a second driver output, the first driver output coupled to the first power stage input, and the second driver output coupled to the second power stage input; a first resistor network coupled between a first input of a pair of differential inputs and the first power stage output, the first resistor network including a trimmable resistor network and a trim input; a second resistor network coupled between a second input of the pair of differential inputs and the second power stage output; and a control circuit having a trim output coupled to the trim input.

A micromechanical piezoresistive pressure sensor (40;340) includes a diaphragm (44) configured to mechanically deform in response to an applied load, a sensor substrate located on the diaphragm, and a number of piezoresistive resistance devices located on the sensor substrate. The piezoresistive resistance devices are arranged in a first planar array defining a grid pattern having two or more rows, each row being aligned in a first direction. The piezoresistive resistance devices are configured to be electrically connected in a number of bridge circuits (30), whereby the piezoresistive resistance devices in each row is electrically connected in an associated bridge circuit. A method of using the micromechanical piezoresistive pressure sensor is also disclosed.

The present invention discloses an integrated monitoring lightning arrester, which includes a lightning arrester outer casing and lightning arrester resistor chips arranged therein, and further includes a pressure sensor and a sealing performance monitoring module. The pressure sensor is arranged between the lightning arrester outer casing and the lightning arrester resistor chips, and the pressure sensor is electrically connected to the sealing performance monitoring module. It can accurately monitor key state variables such as the internal sealing performance, resistive current and phase angle of the lightning arrester, reflect the operation state of the lightning arrester in real time, which has great significance for preventing the further expansion and development of lightning arrester faults, correctly guiding its maintenance work and ensuring the safety of the power grid; moreover, it can replace the power-off test and live detection of the lightning arrester, saving a large amount of manpower and material resources.

The utility model relates to a fuse type resistor. The fuse type resistor comprises a base part, a first lead end and a second lead end, wherein the first lead end and the second lead end are fixed on the base part; the resistance wire is arranged on the base part, and one end of the resistance wire is connected with the first lead end; the fuse is arranged on the carrying part; the carrying part is provided with at least two conductive parts which are connected with the two ends of the fuse respectively, the carrying part is detachably connected with the base part, and the two conductive parts are in contact conduction with the second lead wire end and the other end of the resistance wire respectively. The base part and the carrying part which are detachably connected are configured, so that the fuse and the resistance wire can be integrally assembled, meanwhile, the requirement for separation of the fuse and the resistance wire is met, the fuse part can be independently replaced in the using process, meanwhile, the whole machining and manufacturing process is simpler through a detachable mode, and the cost is reduced. And the cost is lower.

An example method includes: (i) depositing an insulating layer on a substrate; (ii) forming a conductive polymer layer on the insulating layer; and (iii) repeating deposition of a respective insulating layer, and formation of a respective conductive polymer layer to form a multilayer stack of respective conductive polymer layers interposed between respective insulating layers. Each respective conductive polymer layer has a respective electrical resistance, such that when the respective conductive polymer layers are connected in parallel to a power source, a resultant electrical resistance of the respective conductive polymer layers is less than each respective electrical resistance. (Fig. 9)

The utility model provides a lightning arrester which comprises a first lightning arrester body and a second lightning arrester body, one end of the first lightning arrester body is connected with one end of the second lightning arrester body through an upper connecting assembly, the other end of the first lightning arrester body is connected with the other end of the second lightning arrester body through a lower connecting assembly, and therefore a high-insulation lightning arrester body is formed. The first lightning arrester is provided with a base, the base comprises an insulating base, a fastening insulating ring is arranged at the top end of the insulating base, the fastening insulating ring is connected with an insulating sleeve in an inserted manner, an insulating protection seat is arranged in the insulating sleeve in an adhesive manner, and an insulating sleeve is arranged in the insulating protection seat. According to the utility model, the insulating protection seat and the insulating sleeve are arranged in the insulating base, and the lightning arrester core body of the first lightning arrester is arranged in the insulating sleeve, so that the base has a sufficient insulating effect, and the base is prevented from being damaged by a generated alternating-current arc.

The invention relates to a resistor chip and a detection device and method for the state of a voltage-sharing resistor. The resistor chip comprises a voltage-sharing resistor unit, a sampling unit and an insulating substrate, the voltage-sharing resistor unit is used for being connected to the two ends of a target energy storage capacitor of an external circuit in parallel and carrying out voltage division on the target energy storage capacitor based on the fixed resistance value of the voltage-sharing resistor unit so as to passively adjust the voltage value of the target energy storage capacitor; the sampling unit is connected with the voltage-sharing resistor unit in parallel and is used for collecting working information of the voltage-sharing resistor unit, and the working information is used for indicating the working state of the voltage-sharing resistor unit; and the insulating substrate is used for fixing the voltage-sharing resistor unit and the sampling unit. Through the resistor chip, a risk prompt is provided for operation and maintenance personnel in time, so that the safety risk caused by faults of the voltage-sharing resistor unit is reduced.