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A novel thermal network analysis method is introduced to investigate heat characteristic of high power density motor YJKK-500-4 in the paper. According to the special structure of motor and the related theories, and the influence of the motor cooler, radial ventilation channel, air gap and air flow in the rotor field spider to the motor temperature rise is fully considered, the thermal network model...
3D FEM mathematic model which takes into account adequately the effect of stator magnet partition and rotor bearing is establish for the structure characteristics of submersible motor and solve to get the end leakage reactance curve team which is provided with prevalent applied worthiness in this paper. Simple method of mechanical loss is gained by a combination of basic theory of hydrodynamics and...
According to the problem of immeasurable working temperature of submersible motor, it established three-dimension finite element model of part of rotor iron core and half a rotor bearing in rotor three-dimension temperature field. The convective heat transfer coefficient between the lubrication oil in air gap of motor and rotor surface , oil of hollow shaft's were got by the heat transfer and fluid...
To calculate the temperature of 40 kW submersible motor of YQY143 Series, established the three-dimensional mathematical model of stator and rotor. To got the Temperature distribution in map through calculating the coupling field of Temperature field and fluid field by the method of FVM. And also we make the Comparison with the results calculated by FEM to make sure the result is correct, it shows...
Data variation monitor system can get all the data variation details and creates a uniform, multiple point, and conformational isomerization system by analyzing the file system and specified applications. It provides the immediate, accurate and detailed data variation information for system administrator.
One of the significant environmental consequences of urbanization is the urban heat island (UHI). To study the urban heat island in Suzhou city, remote sensing and GIS technology were utilized to quantitatively analysis the thermal spatial and temporal distributions. Landsat TM images from 1986 and 2004 were selected to derive brightness temperature and land cover maps. Then statistics and GIS buffer...
MODIS data provides good data resources in fog detection for its abundant bands and high resolution. The heavy fogs in the Yangtze River Delta during Dec. 20th and 22th in 2007 are detected by multi-spectral threshold method. According to the differences of the radiation features of the cloud, the fog and the land in the visible, middle infrared and far infrared bands, the multi-spectral method is...
Remote sensing plays an important role in the mineral exploration. One of the common applications is to locate alteration zones related to gold deposits. Many studies based on landsat thematic mapper (TM) imagery have been carried out and several methods have been developed. However, the advanced spaceborne thermal emission and reflection radiometer (ASTER) imagery, which has better spectral resolution...
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