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This paper designs a System-in-Package (SiP) device with DSP + FPGA + ADC as the basic architecture. The diffusion thermal resistance model of SiP devices is established, which reduces the thermal resistance of the device by using special encapsulation materials and high heat transfer efficiency. At the same time, the temperature grade of SiP devices is improved. The laboratory temperature test shows...
To investigate the feasibility of replacing SF6 in gas insulated transmission line (GIL) using eco-friendly gas, the physical characteristics and dielectric strength of potential SF6 alternative gases are compared in this paper. These gases include c-C4F8-N2 mixtures, CF3I-N2 mixtures and so on. The by-products and yielding condition of these mixtures are summarized, and the thermal characteristics...
In this paper an ultrasonic reflectometry approach to measure the thermal conductivity and temperature of a material by contact is presented. This device can be utilized for monitoring material properties during manufacturing, and robotic handling of objects. The sensor comprises an AlN piezoelectric ultrasonic transducer operating at GHz frequencies, situated on one side of a silicon chip. The transducer...
Increasing availability of thermal imaging technology made it possible to carry out thermal quality control of vegetables and fruits in the process of sorting them. For the effective management of thermal control, it is necessary to ensure its optimal regimes, which are largely determined by the power and time of the thermal impact. In order to choose these parameters it is necessary to know the thermophysical...
The electrostatic adsorption method can be used to produce composite materials with an arbitrary structure, and their properties may be tuned by changing the size of the individual components, which in turn alters the composition of the material. To develop a thermally conductive and electrically insulating composite material with high thermal conductivity and an acceptable breakdown strength, polymethylmethacrylate...
Thermal simulations are a powerful tool for the development and design of new electronics to predict their thermal behaviour during operation. To obtain accurate thermal simulations the knowledge of thermal properties of all the materials integrated in electronic devices is essential. Most materials show a decrease of thermal conductivity and thermal diffusivity with increasing temperatures, which...
Battery thermal management (BTM) system is indispensable for compact lithium-ion (Li-ion) energy storage system used in aerospace and automotive applications. Besides maintaining the battery temperature within an optimum range, thus extending their lifespan and improving their electrochemical and electrical performance, the BTM system also needs to be well designed with considering the rigorous constraints...
The three-dimensional (3-D) NAND flash memory technology has been considered as a promising candidate for future memory solutions, because it overcomes the scaling limitation and reliability issues faced by conventional planar memory. Even though 3-D NAND flash memory structures have many merits, self-heating effect is aggravated seriously due to the poor thermal conductivity of some of the materials...
In this paper, we mainly focused on analyzing the thermoelectric property i.e. figure of merit of different nanostructured materials in room temperature (300–310 K). Here we studied the transition-metal dichalcogenides, particularly Molybdenum Disulfide (MoS2); Metal Oxides, specifically Zinc Oxide (ZnO); and conventional semiconductor materials, i.e. n-type and p-type Silicon (Si) and Silicon Germanium...
Thermally conductive polymer composites without the deterioration of electrical insulating property are highly desirable for electronic packaging and high voltage devices on account of their ease of processing, flexibility and low cost. In this paper, high thermoconductive boron nitride nanoplatelets (BNNPs) with an average diameter of 5 to 8μm and thickness of around 50nm and semiconductive titania...
Calorimetrie flow meter of motor fuel (bio-fuel) with extended precision of fuel consumption measurement was developed. Extended precision is provided by the temperature control at the entrances of the tube of fuel forward flow and the tube of fuel backflow.
Solder paste material is widely used for power devices as a standard die attach adhesive. But current solder paste material is not suitable to support high power devices which are requiring large current and high voltage application because it has low thermal and electrical conductance property. The characteristics of good die attach material should have high thermal conductance and low coefficient...
This paper presents an equivalent winding model of a small and medium permanent-magnet synchronous motor. The model considers fill factor and void ratio. To verify the model, two winding samples are made. One is annular and adopts ordinary enameled wires. The other is circle but adopts self-adhesion wires. Temperature rises of the winding samples supplied with different current densities are tested...
In a previous contribution[1], a temperature raise equation has been developed to predict the central temperature raise of carbon black/polymerized styrene butadiene rubber (CB/SBR) composites during the compression flexometer test. In the present contribution, the influence of silica/CB ratio on heat generation, thermal conductivity and compression fatigue temperature raise of solution polymerized...
In this study, the temperature characteristics of a one-stage and a two-stage structure of Peltier devices were measured. We identified that the two-stage structure was able to suppress the temperature rise at the endothermic end. A temperature difference was established based on the charge transfer in semiconductors, with respect to both Joule heating and thermal conductivity.
In this paper the boundary value problem for the thermal conductivity of an isotropic piecewise homogeneous plate with a through foreign inclusions, heated heat flow, focused on one of its boundary surfaces is considered. Thermal conductivity of the entire system as a whole is described by means of asymmetric single function. The result is a heat equation with discontinuous and singular coefficients...
Taking the advantage of high specific surface area, fine silver particles were recently attract much attention since they can be sintered as conductive circuits or joints at relatively low processing temperatures. Although various methods have been applied to produce silver particles, the spray pyrolysis (SP) process has an advantage in its low cost and feasibility for mass production. In this study,...
As the power source of robot, the temperature characteristics of the lithium-ion battery directly affect the robot working performance. The thermal characteristics of lithium-ion battery have been intensively studied through both temperature rise tests and the discharging tests, and the PTC thermal management system of power battery was designed to enhance the performance of robot. Battery surface...
The simulation of the temperature field in the diamond-polymer matrix system was conducted. The influence of the matrix's thermal conductivity on the temperature field was explored. Ways of reducing the thermal load on the tool were suggested.
Archaeological studies using computer vision based analysis methods on thermal imageries mainly lack an important stage of pointwise detection of artifact positions, which is needed for the automation of the system in a generic application. In this paper, we propose a pointwise detection method working in the thermal range of hyperspectral band for archaeological artifacts. The proposed method first...
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