8results about How to "Reduce hot spot temperature" patented technology

The application relates to the technical field of energy-saving motors, in particular to a heat-dissipation type permanent magnet motor which comprises a machine shell, a stator arranged in the machine shell, a rotor rotatably supported in the machine shell through a rotating shaft, and a heat-dissipation unit arranged on the machine shell and used for accelerating heat dissipation of the motor. The cooling medium is directly led to pass through the surface of the permanent magnet on the rotor by the rotation of the spiral outer circulation cavity, the permanent magnet is directly cooled, the copper consumption is reduced, energy saving is realized, the cooling medium is driven into the spiral inner circulation cavity by the rotation of the spiral outer circulation cavity, the secondary heat exchange is completed with the stator core and the winding end part, the average temperature of the stator core is reduced, the iron loss is reduced, the local hot spot temperature of the winding end part is reduced, the resistance is reduced, the copper consumption is further reduced, the cooling medium after absorbing heat is discharged into the spiral cooling ribs through the exhaust port by the centrifugal fan and the spiral outer circulation cavity, and the third heat exchange is carried out with the inner wall of the machine shell and the outer wall of the core of the stator.

The invention discloses a GPU (Graphic Processing Unit) chip temperature sensing thread bundle management method, relates to the technical field of GPU chip application, and solves the problems of low efficiency of a thermal management strategy and the like caused by the fact that a thermal prediction method in the prior art cannot cover hot spots of a whole chip, is high in modeling complexity and poor in real-time performance. The thermal prediction model is used for predicting the hot spot temperature of the chip in the running process of the graphics processor; the TAWS scheduling module is constructed based on a two-stage Warp scheduling strategy and is used for comparing the hot spot temperature with a preset maximum temperature threshold value and selectively executing a normal scheduling mode or a temperature control scheduling mode; the temperature of the chip is regulated and controlled; and when the duration of the high-temperature state exceeds the preset maximum allowable duration, the TAWS scheduling module triggers a scheduling freezing mechanism to realize safety control of the chip temperature. According to the method, cross-architecture high-precision generalization, a low-overhead instruction-level thermal sensing scheduling mechanism, refined analysis of instruction-level thermal characteristics and the like are realized.

The application discloses a manufacturing method of a high-heat-dissipation-efficiency pouring type driving transformer, and belongs to the technical field of power electronic equipment manufacturing. The method aims to solve the technical problems of low heat dissipation efficiency and insufficient long-term reliability of the existing driving transformer caused by the limited heat conduction performance of the pouring material, the simple surface heat dissipation structure and the difficult coordination of internal thermal stress. The method comprises the following steps: constructing a three-dimensional digital model of a reinforced heat dissipation structure with a boss array and a groove array and preparing a corresponding forming die; positioning a magnetic core and a winding as an insert in a die cavity; pouring insulating colloid with different mechanical and heat conduction properties in batches in a vacuum environment; through a segmented curing process, the flexible colloid is fully filled in the internal gap and buffers the stress, and at the same time, the high-heat-conduction rigid colloid forms an external main body and a heat dissipation structure, thereby forming an integrated pouring body. The method is used for manufacturing the driving transformer suitable for high-power-density and high-heat-dissipation scenes, and can significantly improve the heat dissipation capacity and operation reliability of the driving transformer.

This invention discloses a power battery module based on a PCM heat absorber plate, comprising a battery pack consisting of several cylindrical batteries arranged in an array; a PCM heat absorber plate, the interior of which is filled with a thermally conductive porous structure and paraffin phase change material, which absorbs heat through melting of the phase change material to reduce battery temperature; the PCM heat absorber plate is provided with several sleeve structures, the sleeves being connected front and rear along the air-cooling flow direction via sleeve connecting plates, and the cylindrical batteries being mounted on the PCM heat absorber plate through the sleeve structures; heating strips, located at the bottom of the PCM heat absorber plate and perforated, fitting around the sleeves, used to heat the battery pack at low temperatures; and a cooling fan, located at the head or tail of the PCM heat absorber plate, used for air-cooling heat dissipation of the battery pack and the PCM heat absorber plate. This invention, using a PCM heat absorber plate, can enhance the thermal conductivity and heat absorption capacity between batteries, thereby reducing local hot spots and temperature differences between batteries, achieving efficient thermal management.

The utility model belongs to the technical field of power capacitor manufacturing, and particularly relates to a composite capacitor core shaft and a capacitor element. The composite capacitor core shaft comprises a core shaft body provided with a regular hexagon through hole, the core shaft body is composed of insulators, annular long holes are formed in the wall thickness of the two ends of the core shaft body in the length direction of the core shaft body, and an insulator interval is arranged between the two ends, close to each other, of the two annular long holes to form isolation. Heat conduction metal bodies are inserted into the two annular long holes respectively, the heat conduction metal bodies and the mandrel body are integrally formed, and the ends, away from each other, of the two heat conduction metal bodies make contact with metal spraying layers at the two ends of a metallized film on the capacitor element so that heat transfer of the capacitor element can be achieved. The internal hot spot temperature of the capacitor element is effectively reduced, the transverse heat conduction efficiency of the capacitor element is improved, the heat transfer effect is further improved, and the problem that heat dissipation and heat balance in the capacitor element with the enlarged geometric size become poor is solved.

The present application relates to the technical field of composite materials, in particular to a high-thermal-conductivity polyaryletherketone composite material with a gradient thermal conduction path and a preparation method thereof, comprising the following steps: S1, thermal-conductivity filler prepreg preparation: mixing and uniformly dispersing flaky thermal-conductivity fillers and spherical thermal-conductivity fillers in a PAEK solution to form a suspension slurry, and then forming a thermal-conductivity filler prepreg through the suspension slurry; S2, stacking the PAEK film and the thermal-conductivity filler prepreg according to a gradient periodic layering to obtain a stack; S3, hot-pressing the stack to form the high-thermal-conductivity polyaryletherketone composite material with the gradient thermal conduction path; the gradient composite material of the present application has a small filler content ratio and still has high thermal conductivity, high insulation and strong interface bonding at a low filler content; the gradient composite material of the present application can effectively reduce the highest local temperature when coping with a non-uniform heat source, and is suitable for heat dissipation components of electronic components.

The shoveling type transformer cooling system comprises a closed circulation loop formed by a transformer oil tank, a first oil collecting pipe, a second oil collecting pipe and a heat sink; the heat sink is packaged by two identical aluminum alloy metal plates, a closed cavity is formed between the two aluminum alloy metal plates, a plurality of welding seams are distributed on the heat sink and divide the closed cavity into a plurality of oil channels, a plurality of same growth type fins are processed on the outer surface of the oil channels, an oil inlet is arranged at the upper end of the heat sink and is communicated with the oil distribution port and the oil channel, and an oil outlet is arranged at the lower end of the heat sink and is communicated with the oil collecting port and the oil channel. The shoveling type transformer cooling system has the advantages that when the heat generation power of the main transformer is constant, the air side convection area of the cooling device is significantly improved, the heat dissipation capacity of the cooling device is significantly increased, the heat inside the main transformer can be discharged to the surrounding environment in time, the hot spot temperature inside the main transformer is reduced, and the safe and stable operation of the main transformer is ensured.

The invention relates to the technical field of methane oxidative coupling, and discloses a methane oxidative coupling method and a method for improving the conversion rate and selectivity of a methane oxidative coupling reaction. The method comprises the following steps: raw material gas is introduced into a reactor filled with a lanthanum-containing catalyst for a methane oxidative coupling reaction, the raw material gas comprises methane, water, CO2 and oxygen-containing gas, and the molar concentration of the introduced CO2 is more than 1 mol% on the basis of the total mole of the raw material gas. By adopting the method, the hot-spot temperature of the catalyst bed can be reduced, and the service life of the catalyst can be prolonged. Meanwhile, the initial reaction activity of the methane coupling reaction can be improved, and the initial conversion rate of methane and the initial selectivity of C2 and above hydrocarbons are improved.