44results about "Adjustable resistors" patented technology

The invention discloses a resonance elimination circuit, method and device, and relates to the technical field of circuits, and the circuit comprises a controller, a resonance elimination resistor and a switching circuit. Two ends of the resonance elimination resistor are respectively connected with the neutral point of the voltage transformer and the ground. The controller controls the switching circuit to be switched off when ferromagnetic resonance is detected, so that the resonance elimination resistor is connected to suppress resonance; after the fault disappears, the control switch is switched on, and the neutral point is directly grounded. The controller compares the neutral point current with a first threshold value to determine resonance generation, and determines fault disappearance when the current is smaller than a second threshold value. And when the resonance elimination resistor is a variable resistor, the controller adjusts the resistance value according to the current change rate and a pre-learned mapping relation. The switching circuit can adopt a switching tube or a relay, and the controller realizes switching by controlling the switching tube to be turned off or a relay coil to be powered off. The circuit can rapidly suppress ferromagnetic resonance, guarantee system stability and improve fault processing efficiency.

The application discloses an integrated battery thermal runaway energy-absorbing resistor and a battery pack. The integrated battery thermal runaway energy-absorbing resistor is used for being integrated on a preset component of the battery pack. The integrated battery thermal runaway energy-absorbing resistor is a laminated body, which comprises a first clamping plate, a second clamping plate and an energy-absorbing laminated body clamped between the first clamping plate and the second clamping plate. The energy-absorbing laminated body comprises a plurality of resistance resistance core plates arranged at intervals. The plurality of resistance resistance core plates are connected in series to form a conductive connection. Adjacent resistance resistance core plates and the energy-absorbing laminated body and the first clamping plate and the second clamping plate are separated by phase change material plates. The application can integrate the energy-absorbing resistor with other structural components in the battery pack from the structure, improve the space utilization and improve the integration degree.

This invention discloses a low-cost heating resistor paste for thermal printheads. The paste uses porous ruthenium dioxide microspheres and porous lead ruthenate microspheres as heating resistor materials, and molybdenum oxide and manganese oxide glass powder as insulating and binding materials. Submicron-sized porous microspheres form the framework structure of the heating resistor material, while micron-sized porous microspheres fill the gaps between the submicron-sized microspheres, improving the particle filling rate of the resistor body. Manganese oxide enhances the bonding force between the glass and the heating resistor material, while molybdenum oxide strengthens the resistance stability at high temperatures. Simultaneously, the addition of nano-sized yttrium trioxide further reduces the porosity of the resistor body and improves the particle filling rate. This invention's heating resistor paste abandons traditional single-particle-size materials, significantly improving resistance consistency through a special particle size combination and the addition of nano-sized yttrium trioxide. It also improves thermal conductivity, resistance adjustment performance, energy resistance characteristics, and printing efficiency. The preparation process is simple and easy to promote.

The invention relates to a model for representing a cell module for an electrical energy storage device with a number of individual cells electrically connected in parallel by means of a cell contacting unit. According to the invention, each individual cell of the cell module is designed as a potentiometer (1) with an adjustable electrical resistance, wherein each potentiometer (1) has a cell housing (1.1) with electrically insulated electrical poles (P1, P2) arranged on a cell cover (1.2), wherein one electrical pole (P1) is formed by means of a threaded sleeve (2) rotatably mounted about its longitudinal axis, one end of which is electrically insulated from the cell cover (1.2).2) protrudes, a further electrical pole (P2) is formed by means of an electrically conductive conductor track (4) and a sliding contact (3) can be positioned by rotating the threaded sleeve (2) along the conductor track (4) and thus a running length of the conductor track (4) is specified or can be specified for setting an electrical resistance value.

Disclosed in the present invention is a short-range optical potentiometer module, comprising a potential base body provided with a key slot, and a potential key which is mounted inside the key slot and can be displaced up and down, wherein a reset member for resetting the potential key is also arranged inside the key slot, an optical pair transistor composed of a photosensitive element and a light-emitting element is arranged inside the potential key, the optical pair transistor can be displaced up and down along with the potential key, a key base is internally provided with a fixed grating corresponding to the optical pair transistor, the reset member is sleeved on the grating, and the grating is configured such that the flux of light received by the photosensitive element from the light-emitting element changes along with the up-and-down displacement of the potential key, thereby causing an electrical signal generated by the photosensitive element to change along with the displacement of the potential key. The module of the solution uses non-contact photoelectric elements, thereby greatly increasing the service life; when the change in flux of light at the same distance is adjusted, the overall height of the module is close to or the same as the height of a potential base body; and the module has a skillful overall structure layout, can be conveniently assembled and replaced, and has strong practicality.

To provide an axial runout prevention member which can prevent increase in size of a device on which an axial runout prevention member is mounted.SOLUTION: An input switching mechanism 30 includes a rotary encoder 32 and an axial runout prevention member 50. The rotary encoder 32 includes a body 34 and a rotary shaft 36 protruding from the body 34. An encoder knob 20 is attached to a tip of the rotary shaft 36. The axial runout prevention member 50 is attached between the rotary encoder 32 and the encoder knob 20. The axial runout prevention member 50 includes: a fixed part 52 fixed to the body 34 of the rotary encoder 32; and a restriction part 54 which is connected to the fixed part 52 and comes into contact with a side surface of the rotary shaft 36. The restriction part 54 directly presses the rotary shaft 36 to enable downsizing of a device on which the input switching mechanism 30 is mounted.SELECTED DRAWING: Figure 7

The invention discloses an optical potential device which comprises a light-emitting element and a light-sensitive element, and a peep-proof membrane is arranged between the light-emitting element and the light-sensitive element. Compared with the prior art, the peep-proof optical potential device has the advantages that the peep-proof membrane is adopted to replace a shading plate of an existing optical potential device, and the louver type light-transmitting unit is arranged on the peep-proof membrane, so that when the peep-proof membrane is overturned, the intensity of light passing through the light-transmitting unit can be stably and uniformly changed; therefore, the resistance value generated by the photosensitive element can be correspondingly and stably changed, and the condition that the resistance value is instantly increased or decreased is avoided.

Disclosed are ways for creating openings through metal oxide varistor (MOV) coatings. In some embodiments, an assembly can include a cutting apparatus including a cutting device, a rotatable platform coupled with the cutting apparatus, and a plurality of metal oxide varistors (MOVs) coupled with the rotatable platform, wherein the cutting device is capable of being biased toward the rotatable platform to form an opening in a coating formed on each of the plurality of MOVs.

The utility model discloses a PET base material potentiometer circuit which comprises an upper circuit and a lower circuit, interlayer glue is arranged between the upper circuit and the lower circuit, back glue is arranged below the lower circuit, the upper circuit is composed of an upper circuit base material, a first silver paste layer and an upper circuit insulating oil layer, and the lower circuit is composed of a lower circuit base material, a second silver paste layer and a lower circuit insulating oil layer. The upper circuit substrate, the first silver paste layer and the upper circuit insulating oil layer are sequentially arranged from top to bottom. According to the utility model, silver paste, carbon paste, insulating oil and the like are printed on the upper PET and the lower PET to form an upper circuit and a lower circuit, and then the upper circuit and the lower circuit are adhered through the double faced adhesive tape to form a resistor loop, so that the function of the potentiometer is realized; a plurality of potentiometers can be unified in the same circuit, the thickness of the product is not more than 1mm, the cost is low, the potentiometer can be freely designed and combined, even a special-shaped potentiometer can be designed, and the degree of freedom of design is improved.

A power supply device comprises an input port, an active rectification circuit, a surge bleeder circuit, a detection circuit, a rectification control circuit, a protection control circuit and a drive circuit. The surge bleeder circuit is coupled between the input port and the active rectification circuit. The detection circuit outputs an output signal which is a normal signal in a normal state to the protection control circuit, and changes the output signal into an actuating signal in response to detecting a surge signal output by the surge bleeder circuit. The protection control circuit outputs a control signal as an operation signal in response to receiving a conventional signal, so that the driving circuit outputs a driving signal to the active rectification circuit according to the operation signal. The protection control circuit transiently interrupts the output of the control signal as the operation signal in response to receiving the actuation signal such that the drive circuit does not output the drive signal.

A resistor substrate production method according to the present invention comprises: a coating step for coating an ink that contains a solvent, a thermosetting resin, and conductive particles onto a substrate and forming a conductive coating film; a drying step for drying a workpiece, which is obtained by providing the conductive coating film on the substrate, at a second temperature that is lower than a first temperature at which a curing reaction of the thermosetting resin progresses, and removing the solvent; a hot pressing step for sandwiching the workpiece after the drying step between a first press platen and a second press platen, which are kept at the first temperature, pressing the workpiece, and partially curing the thermosetting resin; and a firing step for placing the workpiece after the hot pressing step into a firing furnace, firing the workpiece at the first temperature, and completing the curing of the thermosetting resin. In the hot pressing step, pressing is performed after a cushioning sheet that is softer than the pressing surface of the first press platen has been placed between the pressing surface of the first press platen and the workpiece. Therefore, the produced resistor substrate has excellent wear resistance with respect to sliding.

This invention provides low-inductance components and methods for forming them. [Solution] The low-inductance component 200 includes a multilayer monolithic device 201 which includes a first active terminal 204, a second active terminal 206, at least one ground terminal 208, 210, and a pair of capacitors connected in series between the first active terminal and the second active terminal. Leads 246, 248, 250, 251 are coupled to the first active terminal, the second active terminal and / or at least one ground terminal. The leads have respective lengths and maximum widths. The ratio of the length to the maximum width of each lead is less than about 20.

The utility model discloses an electric brush upper layer connecting material breaking-off device which comprises a supporting table, a fixed limiting structure arranged along the edge of the supporting table, an adjustable limiting structure arranged on the fixed limiting structure, a bending part, a breaking-off part and a stepping type feeding device, wherein the bending part, the breaking-off part and the stepping type feeding device are sequentially arranged along the fixed limiting structure from front to back. The utility model provides an electric brush upper layer connecting material breaking-off device which can stably and accurately complete removal of an upper layer material belt, is simple and stable in structure, not only greatly improves the removal efficiency of the upper layer material belt, but also has better operation stability, reduces the maintenance frequency of the device, and ensures the yield of production.

The invention relates to a potentiometer applied to a rail transit locomotive master electric appliance, in particular to an integrated redundant electronic potentiometer, and solves the problems of high material requirement, complex process, poor flexibility and adaptability, long-term abrasion between an electric brush and a resistor body in the use process, low cost and the like of the existing potentiometer in a railway locomotive control electric appliance. Product faults are easily caused, and the service life of the product is short. The potentiometer comprises an upper-end magnetic coding circuit board, an upper-end base, a lower-end hollow magnetic coding circuit board, a lower-end base, an upper-end control shaft, cylindrical magnetic steel, a lower-end control shaft and annular magnetic steel, the lower end control shaft is used for being connected with a control handle of a driver controller. A shaft end magnetic field shaft angle measuring circuit is used for measuring the magnetic field direction variable quantity of the cylindrical magnetic steel, and the rotating angle of the upper end control shaft is obtained; the shaft side magnetic field shaft angle measuring circuit is used for measuring the magnetic field direction variation of the annular magnetic steel, and the rotation angle of the lower end control shaft is obtained.

The invention provides a surge protection device and a manufacturing method thereof. The surge protection device comprises a first carrier and a second carrier. A first release unit mounted to the first carrier and a second release unit mounted to the second carrier. Each release unit includes a first terminal and a second terminal. The first electrode has a first insert portion for electrically and mechanically connecting the surge protection device with an external socket, and is electrically connected to the first terminals of the first and second release units. The second electrode has a second insert portion and a spring loaded movable finger. A holding member is provided to the second terminals of the first and second release units. In the first connection state, the finger portion is connected to the holding member via a low-temperature solder joint. In the second disconnected state, when the low-temperature solder joint is released, the finger is disconnected from the holding member.

The invention relates to an annular bridge arm electric reactor, and the electric reactor comprises a body which comprises a plurality of winding units, each winding unit is formed by winding a wire along a spiral path, the plurality of winding units are coaxially nested, and the winding units are annular; the connecting wire is connected with the head end of one of the two adjacent winding units and the tail end of the other of the two adjacent winding units so as to connect the adjacent winding units in series; one of the two leads is connected to the head end of the winding unit, located on the outermost side, of the body, the other of the two leads is connected to the head end of the winding unit, located on the innermost side, of the body, and the connecting wires are all located in the cross section, in the circumferential direction, of the winding unit, located on the outermost side, of the body. The connecting wire does not need to extend out of the body, the potential difference between the connecting wire and other winding units is reduced, the overall insulation design difficulty of the connecting wire and the annular bridge arm reactor is reduced, and the reliability of the annular bridge arm reactor is improved.

The present application relates to the technical field of signal processing, in particular to a resistor adjusting method and system based on MEMS technology. The present application constructs an initial conduction link by preferentially screening a topology structure with the maximum number of parallel branches, maximizes the current shunt capability at the physical level and provides redundancy space for subsequent adjustment, quantifies the load deviation degree based on the real-time collected branch current distribution data, accurately modulates the electrostatic driving force applied to a specific micro-cantilever beam by using the sensitivity mapping relationship of the driving voltage to the contact resistance, dynamically compensates the impedance difference between the branches by fine-tuning the contact pressure of the contact point, forcibly realizes the uniformization of current distribution to eliminate local hot spots and suppress the electron migration effect, and executes the maximum common substructure matching logic under the resistance value transition instruction, locks the driving voltage state of the coincident node to inherit the established load balancing parameters, and only minimizes the action of the switch combination of the residual part.

The utility model discloses a plate-type resistor which comprises a resistor body, the resistor body comprises a plurality of layers of alloy plates which are coaxially arranged, the alloy plates are detachable, the distance between every two adjacent layers of alloy plates is adjustable, each layer of alloy plate is provided with a ceramic ring and a conducting ring, the ceramic rings serve as insulation structures between the layers of alloy plates and are used for separating the plurality of alloy plates, and the conducting rings are used for conducting the plurality of alloy plates. The conducting rings serve as electrical connection structures between the alloy plates and are used for communicating the alloy plates. According to the plate-type resistor disclosed by the utility model, the alloy plates with a multi-layer structure are adopted, the number, the layer distance and the arrangement mode of the alloy plates can be adjusted according to actual pre-charging conditions so as to adapt to working conditions of different energy grades, the suitability is improved, and meanwhile, the whole resistor participates in the energy absorption process as the multi-layer alloy plates are used as the resistor, so that the energy absorption efficiency is improved. And the mass of the alloy plate is relatively large, and the mass of the resistor body formed by the alloy plate is also relatively large, so that the high-energy impact resistance is relatively high.

The utility model provides a kind of terminal drop layer riveting's film potentiometer, including upper layer substrate, upper layer circuit, lower layer substrate, lower layer circuit, glue barrier layer, all-round conductive adhesive layer, metal terminal;Upper layer circuit is set in the inner side of the upper layer substrate corresponding printing, the upper surface of the lower layer circuit is set in the lower layer substrate corresponding printing, glue barrier layer is formed interval space before the upper layer circuit and the lower layer circuit corresponding coating arrangement;The outlet end of upper layer circuit is formed in the interval space, the lower layer circuit is provided with the wire corresponding to the upper layer circuit, the outlet end of upper layer circuit is connected with the wire conduction by all-round conductive adhesive layer, the other end of wire extends to the position corresponding to the outlet end of the lower layer circuit, metal terminal is riveted and arranged in lower layer circuit outlet end corresponding. Terminal and line surface contact, increase contact area, improve conductive performance, and stability is stronger, not easy to occur virtual road.

The invention relates to the technical field of resistor cabinet resistance adjustment, in particular to an automatic resistance value control method and system applied to a resistor cabinet, and the method comprises the steps: obtaining voltage data and current data of a line in different states in a plurality of collection periods; according to the frequency characteristics of the voltage data of each acquisition time period, the average value of bandwidths of different frequencies in the voltage data of each acquisition time period, and the variation amplitude and the variation rate characteristics of the current data of each acquisition time period, in combination with the maximum value of the voltage data and the maximum value of the current data of each acquisition time period, obtaining a fault electrical variable vector of each acquisition time period; and obtaining a state type prediction tree according to the fault electrical variable vectors of all the collection time periods in all the states and the corresponding line states, thereby obtaining the state type of the current collection time period, and further adjusting the resistance value by using a resistance cabinet. By analyzing the data characteristics of the voltage and the current under different fault types, the adjustment accuracy of the resistance value of the resistor cabinet is improved.

A current controlling element includes: a first magnetic core forming a magnetic circuit; a coil for generating a magnetic flux in the first magnetic core when energized; a second magnetic core arranged at a distance from the first magnetic core; and a magnetoresistive conductor arranged in a first air gap between the first magnetic core and the second magnetic core.

The application relates to the field of systems for adjusting electric variables, and discloses a dynamic resistance compensation adjustment method for a high-linearity potentiometer, which comprises the following steps: collecting real-time voltage and excitation current of an adjustment node, and calculating the apparent resistance of an adjustment tap position; using a first-order difference operator to extract a dynamic evolution gradient representing impedance distribution characteristics and interface random interference noise; comparing the evolution gradient with an ideal linear slope to determine a deviation ratio coefficient; adjusting the feedback branch gain according to the deviation ratio coefficient, and introducing a phase lead compensation link based on the change rate of the deviation ratio coefficient; the application generates a forward reverse adjustment level, neutralizes signal phase lag caused by micro contact hysteresis of materials, makes the output electric parameter stable in a preset linear interval, effectively reduces full-range linearity error, suppresses the interference of interface transition impedance fluctuation on adjustment smoothness, and ensures that a precision adjustment link maintains a high-precision adjustment reference in a wide-temperature environment.

The present invention provides a high-stability contactless Hall-effect joystick potentiometer, comprising a base and a cover case, wherein the cover case covers the base to form an assembling space, a spring, a gland, and a joystick structure are sequentially arranged in the assembling space from bottom to top, and the joystick structure comprises a lower joystick arm, an upper joystick arm, and a joystick handle; a first protective shell is mounted on one side of the cover case, and a second protective shell is mounted on an adjacent side of the cover case; a first circuit board is mounted in the first protective shell, and a second circuit board is mounted in the second protective shell; a first contactless Hall sensor is mounted on the first circuit board, and a second contactless Hall sensor is mounted on the second circuit board; a magnet mounting recess is formed in the part of a free end of one side of each of the upper joystick arm and the lower joystick arm extending beyond the cover case, a first magnet is mounted in the magnet mounting recess of the lower joystick arm, and a second magnet is mounted in the magnet mounting recess of the upper joystick arm; a rotating shaft, the second magnet, and the second contactless Hall sensor are coaxially arranged. The stability of voltage output is improved.

The high-precision Hall rocker potentiometer comprises a Hall rocker potentiometer body, the upper end of the Hall rocker potentiometer body is fixedly connected with a rocker handle, the upper end of the rocker handle is connected with a direction adjusting assembly, and the upper end of the direction adjusting assembly is fixedly connected with a grabbing ball; the direction adjusting assembly comprises a rotation adjusting assembly connected to the rocker grab handle, the upper end of the rotation adjusting assembly is connected with a deflection adjusting assembly, and the upper end of the deflection adjusting assembly is fixedly connected with an inner threaded pipe. According to the Hall rocker potentiometer, the angle of the grabbing ball can be flexibly adjusted according to actual use requirements, and the height of the grabbing ball can be adjusted through thread fit between the adjusting screw rod and the internal thread pipe, so that the use flexibility of the Hall rocker potentiometer is further improved, and the use comfort of the Hall rocker potentiometer can be improved.

An electrostatic discharge protection tool for reducing electrostatic charge present on a workpiece within a workpiece processing module has a moveable head and forms an at least partially conductive path between a tip of the tool and a body of the tool for grounding a charged workpiece in contact with the tip.

This invention discloses an Sb-enhanced AgCu alloy, its preparation method, and its applications, relating to the field of high-end electrical contact metal materials technology. The composition of this Sb-enhanced AgCu alloy, by mass percentage, includes: 20-40% Cu, 1-10% Sb, and the balance Ag. The specific preparation method is as follows: alloy raw materials are weighed and mixed in proportion to obtain mixed raw material powder; the mixed raw material powder is vacuum melted to obtain alloy melt; the alloy melt is cast to obtain an ingot; the ingot is subjected to homogenization treatment, cold rolling, annealing, drawing, solution treatment, and aging treatment to obtain the Sb-enhanced AgCu alloy. This invention, by introducing Sb into the AgCu alloy and combining it with a precisely controlled heat treatment process, achieves microstructure optimization and synergistic performance improvement, preparing an Sb-enhanced AgCu alloy with excellent mechanical, electrical, and processing properties, which can be applied to micro-motor brush filament materials, potentiometer brush filaments, or semiconductor test probe materials.

The turn number limiting mechanism comprises a shell and a rotating shaft arranged in the middle of the shell in a penetrating mode, the rotating shaft can rotate relative to the shell, the shell is provided with an annular cavity, a limiting disc is arranged in the annular cavity, and the rotating shaft is sleeved with the middle of the limiting disc in a sliding mode. The circumferential outer side of the limiting disc is in threaded connection with the side wall of the annular cavity; when the rotating shaft is rotated, the limiting disc can axially move along the rotating shaft under the action of thread transmission; the two axial ends of the annular cavity are provided with a starting stop structure and an end stop structure respectively, and the movement range of the limiting disc is between the starting stop structure and the end stop structure. The limiting device has the advantages that stroke limiting is carried out on the axial movement range of the limiting disc through the starting stop structure and the terminal stop structure, namely, the number of rotation turns of the limiting disc is limited, and therefore the number of rotation turns of the rotating shaft is accurately limited.

The utility model provides an impedance multiplication structure which comprises a substrate, a first external electrode, a second external electrode, a plurality of surface resistors and a plurality of impedance adjusting electrodes, and the impedance multiplication structure adjusts the total impedance value of the impedance multiplication structure by cutting off at least one of the impedance adjusting electrodes.

The long-service-life electric brush assembly comprises an insulated electric brush seat and a conductive electric brush, the ellipse-like electric brush is formed by arranging a plurality of annularly closed electric brush wires side by side, the electric brush is arranged on the outer wall of the ellipse-like or ellipse-like electric brush seat, and the electric brush is arranged on the outer wall of the ellipse-like or ellipse-like electric brush seat. Two ends of a short shaft of the electric brush are respectively connected with two ends of a short shaft of the electric brush seat, gaps are reserved between two ends of a long shaft of the electric brush and two ends of a long shaft of the electric brush seat, and the two ends of the long shaft of the electric brush are respectively bent to form electric brush contact parts. The two symmetrical electric brush contact parts at the two ends of the long shaft of the electric brush can provide a push-pull effect when operating in a vibration environment, the friction force of the electric brush contact parts is dispersed to two fulcrums, the electric brush contact parts are not easy to shake, the deformation is small, the electric brush contact parts follow well, the return error is small, the contact stability is good, and the service life of the electric brush is prolonged. Finally, the detection precision or the output voltage control precision of the potentiometer is obviously improved, and the service life is obviously prolonged.

The present invention relates to a sensor comprising a ceramic substrate (1) and two metallisation layers (2) applied on opposite surfaces of the ceramic substrate (1), wherein the two metallisation layers (2) each comprise an adhesive layer (2A) which is applied directly onto the ceramic substrate (1) and each comprise a gold layer (2B) which is applied to the respective adhesive layer (2A). The invention further relates to a method for producing the sensor.