264results about "Resistor cooling/heating/ventillation" patented technology

Systems, apparatuses, and methods for a modular resistor grid system include a mount and a plurality of modular resistor grid assemblies that interchangeably couple to the mount. At least two modular resistor grid assemblies are in the plurality. Each has a housing and a plurality of resistor plates. Each housing has input and output terminals. Each plurality of resistor plates is connected between the input and the output terminal of a housing. Each resistor plate has a thickness, and each plurality of resistor plates provides a target electrical resistance for a modular resistor grid assembly. A first modular resistor grid assembly has a first number of resistor plates with a first thickness. A second modular resistor grid assembly has a second number of resistor plates with a second thickness. The first number of resistor plates is greater than the second number. The first thickness is greater than the second thickness.

The invention discloses a power type negative temperature coefficient thermistor and method for suppressing surge current, and relates to the technical field of negative temperature coefficient thermistors, the thermistor comprises a core body and pins, the pins are respectively arranged on electrodes on two sides of the core body by adopting a multi-contact-surface structure, and the pins are arranged on the two sides of the core body. The core body is made of a Mn-Co-Ni-La oxide with a nano composite gradient structure; the Mn-Co-Ni-La oxide with the nano-composite gradient structure determines the upper limits of core capabilities such as surge suppression, wide temperature stability and low power consumption of the thermistor, and the redesign of the pin is the key of performance transfer, so that the electrical properties (low contact resistance and high surge tolerance) of the Mn-Co-Ni-La oxide with the nano-composite gradient structure are not counteracted by structural defects; the arrangement of the bracket prevents the Mn-Co-Ni-La oxide with the nano-composite gradient structure from losing the effect due to heat accumulation and physical damage through thermal management and mechanical protection, and the three components supplement one another and cooperate with one another, so that the performance of the thermistor of the Mn-Co-Ni-La oxide with the nano-composite gradient structure is guaranteed.

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 utility model discloses a mounting structure of a wire wound resistor, comprising two brackets for detachably connecting with the resistor, the two brackets are symmetrically distributed along the length direction of the resistor, the brackets comprise an elastic metal sheet and a conductive cap, the upper end of the elastic metal sheet is welded and fixed to the outer side of the conductive cap, the inner side of the conductive cap is provided with an assembly cavity adapted to the resistor end cap, and the spacing between the inner walls of the assembly cavities on the two conductive caps is less than the length of the resistor. The resistor of the utility model is more convenient to replace later, saving time and effort, and the replacement efficiency is improved.

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%.

The invention provides a lightning arrester for a 10KV distribution network, and relates to the technical field of lightning arresters, the lightning arrester comprises a shell part and a core body, the shell part is provided with a cylindrical inner cavity, and the core body is arranged in the inner cavity of the shell part; the core body comprises at least one zinc oxide resistor disc and one or two discharge cavity assemblies, and by designing the structure of the core body and the design of the discharge cavity assemblies, the two ends of a cylinder structure formed by the zinc oxide resistor disc and the discharge cavity assemblies form an open-circuit state, and compared with a traditional low-energy-consumption state, the energy consumption is reduced; the lightning arrester can solve the problem that the lightning arrester is in a low-energy-consumption state for a long time, so that energy conservation is realized, and when a line bears a high-voltage state, a pole piece in the discharge cavity assembly generates a discharge effect, and the discharge cavity assembly is in a conducting state; the zinc oxide resistor disc is also in a conducting state when the circuit bears high voltage due to the characteristic that the zinc oxide resistor disc belongs to a non-linear resistor piece, so that the core body is in a conducting state, the circuit is conducted with the ground in a short time, and the purpose of protecting the power distribution element is achieved.

The invention discloses an aluminum shell heat dissipation and heating tube resistor integrated structure which comprises a heat dissipation aluminum shell, a plurality of installation cavities are formed in the heat dissipation aluminum shell, heating assemblies are installed in the installation cavities, lead terminals are installed on the heating assemblies, a closed cooling cavity is formed in the heat dissipation aluminum shell, and a resistor is arranged in the closed cooling cavity. According to the aluminum shell heat dissipation and heating tube resistor integrated structure, through the integrated fusion design of the aluminum shell and the heating tube resistor and the combination of the phase change material cooling technology, the heat dissipation bottleneck problem of a high-power resistor is solved, and the aluminum shell heat dissipation and heating tube resistor integrated structure is compact in structure and efficient in heat dissipation; the resistor is particularly suitable for high-end industrial application such as robots and new energy equipment, and is expected to replace a traditional aluminum shell resistor and an independent cooling system, the reliability of equipment is enhanced, and meanwhile, the equipment cost and maintenance requirements are reduced.

The utility model relates to the technical field of circuit elements, and specifically to a high-power plug-in alloy resistor, comprising a resistor housing, a sealing shell component, a connecting component and a heat dissipation component, wherein the heat dissipation component comprises a heat sink, a resistor core, an insulating sheet and quartz sand, wherein the heat sink is fixedly mounted in the resistor housing, the resistor core is fixedly mounted on the heat sink, the insulating sheet is fixedly mounted on the resistor core, and the quartz sand is fixedly mounted in the resistor housing, the resistor housing is welded and fixed on a circuit board through pins, and is electrically conductive through a conductive block, the resistor core emits heat during the flow of current, the emitted heat is dissipated through the heat sink, the high temperature generated by the resistor core is effectively taken away, and the performance is improved, while under the action of the insulating sheet and the quartz sand, the resistor core is protected, and the heat generated by the resistor core can be quickly conducted to the heat sink for heat dissipation, thereby effectively dissipating the generated heat and improving the service life of the resistor.

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.

A resistor assembly, in particular a resistor assembly for a power combiner, includes a resistor chip and a clamping element for fixing the resistor chip to a cooling element, the clamping element having a clamping arm that applies pressure to the resistor chip.

Electrothermal converter (ETC) for converting electrical energy into thermal energy, comprising: - a heat sink (CC) with at least one cooling channel (CC) for passing a cooling medium or at least one heat dissipation surface for transferring heat to a cooling medium that passes by the at least one heat dissipation surface; - an electrical insulating layer formed on a surface (OF1) of the heat sink (KK); - at least one heating conductor (HL) which is formed by thermal spraying on a surface (OF2) of the insulating layer facing away from the heat sink (KK); - at least two connection frames (AR1, AR2) for electrically connecting the at least one heating conductor (HL), which are spatially separated from each other and are electrically and physically connected to the at least one heating conductor (HL), characterized in that - the at least one heating conductor (HL) through thermal spraying and subsequent laser trimming is formed, and contains a chromium-nickel alloy; - where the chromium-nickel alloy contains nickel in a mass fraction of less than 10%.

The present application relates to the technical field of high-power resistor, conductive connection, electrothermal technology, and provides a production method of a high-power resistor with separated resistor sheets and the high-power resistor. The method comprises: processing a metal material through a laser device to make a resistor shell with convection heat dissipation holes; processing a plurality of cuboid-shaped resistor sheets, each resistor sheet being provided with an insulating support at an end portion and being capable of being connected in series and parallel according to resistance requirements as an independent resistance unit; and installing the resistor sheets into the shell at intervals to form a convection space of a preset height between adjacent resistor sheets, which is communicated with an external environment through the convection heat dissipation holes. The method of the present application obtains a high-power resistor composed of independent resistance units through a separated design and convection heat dissipation, effectively reduces the thermal load and energy consumption of the high-power resistor, and prolongs the service life.

The invention discloses a special-shaped precision detection resistor and production equipment thereof, and relates to the technical field of resistor production and manufacturing, the special-shaped precision detection resistor comprises an alloy red copper shell and two resistor cores arranged in the alloy red copper shell, and one side of the alloy red copper shell is provided with two leading-out ends; the lead-out end is electrically connected with the resistor core, the outer wall of the bottom of the alloy red copper shell and the outer wall of the top of the alloy red copper shell are respectively provided with a plurality of groups of heat dissipation grooves and heat dissipation assemblies which are distributed at equal intervals, and the heat dissipation mechanism is located in the alloy red copper shell and comprises two water cooling pipes. The special-shaped precision detection resistor and the production equipment thereof disclosed by the invention have the effects of improving the stability of the resistor core during use, enhancing the heat dissipation performance of the resistor core, ensuring the reliability and safety of a system, improving the working efficiency of a brake resistor, prolonging the service life of the brake resistor, controlling and reducing the thermoelectromotive force and avoiding the occurrence of a condition of overhigh parasitic inductance.

A demister heater comprising a tubular heater body (10) comprising a spirally wound electrical conductor (30) embedded in a tube of high thermally conductive resin (32), the tubular body sized to fit within a demister tube through which air passes.

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.

A quench protection arrangement for a superconducting magnet is disclosed. The arrangement comprises: a superconducting magnet comprising a plurality of magnet sections; a plurality of varistors, wherein each of the plurality of varistors is electrically connected in parallel across a respective one of the plurality of magnet sections; and a heater arrangement electrically connected to the plurality of varistors and configured to apply heat to each of the plurality of magnet sections in response to a change in a voltage across any one or more of the plurality of varistors. A method of protecting a superconducting magnet is also disclosed.

A battery pack according to one embodiment of the present invention includes: a battery module in which a plurality of battery cells are mounted; and a discharge member electrically connected to the battery module, wherein the discharge member includes: a frame member having an open upper portion and containing coolant; a top cover for covering the upper portion of the frame member; and a resistor mounted in the frame member, wherein both ends of the resistor are exposed to the outside of the discharge member and electrically connected to the battery module.

The utility model discloses a high-temperature-resistant winding resistor device which comprises a ceramic winding reel, two ends of the ceramic winding reel are fixedly connected with pin caps, the circumferential outer wall of the ceramic winding reel is connected with a resistance wire in a winding mode, a contact pin is arranged between the ceramic winding reel and the pin caps in a penetrating mode, the outer side of the resistance wire is sleeved with an insulating shell, and the outer side of the insulating shell is sleeved with an insulating sleeve. A plurality of heat dissipation fins are clamped on the outer wall of the circumference of the insulating shell, and a plurality of heat dissipation holes are formed in the circumference of the insulating shell. According to the utility model, heat generated by the resistance wire is efficiently transmitted to the insulating shell through the insulating heat-conducting glue, and then is dissipated into the air through the heat dissipation fins, so that the resistance wire is subjected to heat dissipation and cooling at a high speed, and meanwhile, the heat of the resistance wire is dissipated from the heat dissipation holes, so that the resistance wire is better subjected to heat dissipation and cooling, and the service life of the resistance wire is prolonged. Therefore, the resistance device is prevented from generating stress due to high-temperature expansion, the resistance wire is prevented from loosening and deforming, and the precision and stability of the resistor are prevented from being reduced.

The invention relates to an electronic device comprising: - a component having a resistance (R120) with a negative temperature coefficient, and - a temperature control means having an electrical resistance (R130) varying as a function of the temperature T such that the sum of the total resistance (R) is, on a second temperature subrange (302), greater than a setpoint temperature (305), strictly greater than the total resistance (R) at the setpoint temperature (305).

The utility model provides a chip resistor. The chip resistor comprises a substrate, a back electrode, a front electrode, a resistive layer, a protective layer and a side electrode, the protective layer comprises a first protective layer and a second protective layer; the first protective layer is made of a glass material, and the second protective layer is made of at least two layers of epoxy resin materials; a third protective layer is formed on the left electrode and the right electrode which are not covered, and the third protective layer is made of a resin silver material; through a multi-layer protection structure formed by the first protection layer made of the glass material and the second protection layer made of the epoxy resin material, invasion of moisture, chemical corrosion and mechanical damage is effectively prevented, the service life of the resistor in a severe environment is remarkably prolonged, and particularly, through the third protection layer made of the resin silver material, the service life of the resistor is prolonged. The anti-corrosion performance of the electrode part is enhanced, so that the resistor can keep stable electrical performance during long-time work.

The utility model relates to a resistor box body, in particular to a heat dissipation window for the resistor box body, which solves the problems that the open-air environment is not considered in the design of the heat dissipation window of the existing resistor box body, and sand and dust are easy to gather in an air duct of the heat dissipation window, so that the through-flow area is reduced, and the heat dissipation is influenced. The projection parts of the second vertical sections of the S-shaped shutter strips located at the top and the projection parts of the first vertical ends of the S-shaped shutter strips located at the bottom in the plane where the first vertical sections or the second vertical sections are located coincide; the two flow guide plates guide the hot air to enable the hot air to flow to the outside, if external sand and dust enter the resistance box, the sand and dust need to move upwards against the gravity, the flow guide plates block the sand and dust, part of the sand and dust can fall on the second flow guide plate, and the included angle between the first flow guide plate and the first vertical section is 100-170 degrees; and the included angle between the second guide plate and the second vertical section is 100-170 degrees, so that a large amount of dust cannot be gathered, and smooth through-flow is ensured.

The invention discloses a thermal control structure of a large-scale array microsystem, which relates to the technical field of large-scale array microsystems and comprises seven microsystem sub-modules, a temperature information acquisition board, a structural framework, a cover plate and a heat conduction pad. Each microsystem sub-module is of a multi-layer structure, the middle layer is a ceramic carrier plate, an antenna array plane and a thermal resistor used for heating an equivalent chip are welded to the upper layer, and a molybdenum copper plate is welded to the lower layer to serve as a supporting structure; the micro-system sub-module is in threaded connection with the structural frame through a screw hole in the molybdenum copper plate, and the heat conduction pad is located between the micro-system sub-module and the structural frame; the temperature information acquisition board is used for reading the temperature near the thermal resistor and is connected with the micro-system sub-module through a low-frequency connector; the cover plate is in threaded connection with the structural frame, so that the problems that a large-scale array microsystem is poor in temperature uniformity and the performance is affected are solved.

The utility model discloses a locomotive brake resistor quick replacement device, which relates to the technical field of brake resistor replacement devices and comprises a mounting frame, mounting openings are formed in two sides of the mounting frame in a penetrating manner, fixing mechanisms are arranged in the mounting openings, and a wire placement groove is formed in the back surface of the mounting frame. The fixing mechanism comprises a mounting groove formed in the inner bottom wall of the mounting opening, clamping plates are arranged in the mounting groove, and symmetrical limiting clamping strips are arranged on the upper surfaces of the two clamping plates. According to the quick replacing device for the locomotive brake resistor, due to the arrangement of the fixing mechanism, the clamping plates on the two sides are pushed under the action of the spring to clamp and fix the brake resistor device in the mounting frame, so that the brake resistor device can be mounted and dismounted, and when the brake resistor device is dismounted, the push rod is pushed to drive the clamping plates to move in the mounting grooves; and the brake resistor can be taken out from the mounting frame, so that the replacement efficiency of the brake resistor is improved while the operation is simple.

An electronic device, comprising a component having a resistance with a negative temperature coefficient, and a temperature control means having an electrical resistance varying according to the temperature, such that the sum of the total resistance is, over a second temperature subrange greater than a setpoint temperature strictly greater than the total resistance at the setpoint temperature

The utility model relates to the technical field of control cabinets, and in particular to a control cabinet resistor heat dissipation bracket, comprising a bracket main body installed on the back of the resistor and two mounting parts respectively arranged at two ends of the bracket main body, and the mounting part is located on the back of the bracket main body, and the back of the bracket main body is provided with a plurality of heat dissipation fins and a heat dissipation fan for driving air flow around the heat dissipation fins. By arranging the bracket main body, the mounting part and the heat dissipation fins, the resistor is installed inside the electric control cabinet through the bracket main body and the mounting part. The bracket main body and the heat dissipation fins can quickly conduct away the heat generated by the resistor when it is working, and at the same time reduce the contact area with the mounting plane, so as to avoid mutual influence between the resistor and other electrical components. By arranging the heat dissipation fan, the flow of air can be driven, and the heat dissipation effect is better.

The high-temperature-resistant and corrosion-resistant ceramic resistor comprises a ceramic resistor, the ceramic resistor is placed in a support, first placing grooves are formed in the centers of the two sides of the support, pins of the ceramic resistor are placed in the first placing grooves, through grooves are formed in the centers of the two ends of the support, and second heat dissipation assemblies are arranged in the through grooves. A plurality of clamping grooves are formed in the two ends of the bottom of the inner surface of the support, first heat dissipation pieces are connected to the clamping grooves in a clamped mode, second heat dissipation assemblies are arranged at the two ends of the support where the ceramic resistor is installed, and heat generated in the working process of the ceramic resistor is guided into sliding blocks through heat conduction plates through the second heat dissipation assemblies; and the heat is finally guided into the second cooling fins, and is guided out through the second cooling fins, so that the bracket is provided with a corresponding heat dissipation mechanism, the heat dissipation of the ceramic resistor is carried out, and the heat dissipation of the ceramic resistor is prevented from being influenced after the ceramic resistor is mounted through the bracket, so that the high-temperature-resistant characteristic of the ceramic resistor is prevented from being influenced.

The invention relates to the technical field of resistors, in particular to a convenient-to-install special resistor device for a medium-voltage load, which comprises a plurality of stacked resistor units, each resistor unit comprises a support frame and a plurality of resistor tubes, the periphery of each support frame is enclosed, the upper and lower parts of each support frame are open, and the resistor tubes are arranged in the support frames. Each resistor tube comprises an insulated supporting tube and a resistor strip, the resistor strip is an exposed metal strip, the resistor strip comprises a main body section and a connecting section which are integrally and continuously bent and sequentially alternate, the main body section keeps a linear shape by virtue of the strength of the main body section, the connecting section is in an arc shape, and two adjacent main body sections are connected through the connecting section and are arranged in a V shape; a plurality of positioning grooves are formed in the outer side of the supporting pipe, and the middle of each main body section is lapped and embedded in the corresponding positioning groove. Compared with the prior art, the heat dissipation performance is good, and the power density is higher. In addition, the side wall of the supporting frame is provided with the side air holes capable of being opened and closed, and therefore the inner side and the outer side of the supporting frame can be selectively communicated in the using process.

The invention discloses a dynamic reactive power support operation method of a hybrid commutation converter, the converter and equipment. The method comprises the following steps: detecting whether the hybrid commutation converter has a reactive power demand or not; starting an advanced turn-off mode under the condition that the hybrid commutation converter has a reactive power demand; determining an initial trigger angle according to a preset target reference value and the output value of the hybrid commutation converter; adjusting the initial trigger angle in a preset second quadrant angle range to obtain a target trigger angle; the next trigger bridge arm is triggered and conducted based on the target trigger angle, so that the hybrid commutation converter outputs reactive power, and the range of the second quadrant angle is 180-270 degrees; according to the embodiment of the invention, the hybrid commutation converter can be supported to realize advanced turn-off in the second quadrant angle range, and the target trigger angle of the next trigger bridge arm is dynamically adjusted by adjusting the initial trigger angle, so that the dynamic reactive power support technology of the hybrid commutation converter is realized.

The utility model discloses a low-temperature-resistant shunt resistor assembly which comprises a resistor body, an input side wire connector, an output side wire connector and two substrates, one end of the resistor body is electrically connected with the input side wire connector, the other end of the resistor body is electrically connected with the output side wire connector, one substrate is connected into a gap between the resistor body and the input side wire connector, and the other substrate is connected into a gap between the resistor body and the output side wire connector; the resistor body comprises two T-shaped blocks and a plurality of groups of sheet-shaped resistors which are distributed at equal intervals, one side of each sheet-shaped resistor is connected to one T-shaped block, and the other side of each sheet-shaped resistor is connected to the other T-shaped block. The low-temperature-resistant shunt resistor assembly disclosed by the utility model has the beneficial effects that the substrate can bear and conduct deformation of the resistor body caused by temperature change in high and low temperature environments, so that the influence of the temperature change on the performance of the chip resistor is reduced.

Systems and methods for modulating power provided to a heating element of a vehicle exhaust system is provided. One system includes a controller controlling a switch, and an alternator having a first field terminal input, wherein the first field terminal input is connected to the switch. The system further includes a heating element connected to at least an output of the alternator. The controller is configured to determine a power demand for the electric heating element and modulate the first field terminal input to cause the alternator to provide power to the heating element according to the power demand.