scholarly journals Experimental study and thermal analysis of cooling systems for brushless motors with double stator and axial gap

2021 ◽  
Vol 18 (3) ◽  
pp. 333-349
Author(s):  
Boris Velev ◽  
Ivan Ivanov ◽  
Vladimir Kamenov
Keyword(s):  
Thermal Analysis ◽  
Experimental Study ◽  
Permanent Magnets ◽  
Heat Fluxes ◽  
Electric Motors ◽  
Liquid Cooling ◽  
Cooling Systems ◽  
Brushless Motors ◽  
Labview Software ◽  
World Environment

The results of experimental research and thermal analysis of several types of cooling of brushless electric motors with nominal power 10-12kW (PMAC), suitable for ?light? EV/HEV vehicles are presented in the research paper. The studied motors have permanent magnets, a double stator and an axial magnetic flux with air or liquid cooling. The Motor-CAD software performed the presented thermal analysis. The experimental study was made on the basis of precision results, obtained from the measurement of process temperatures during operation in a real-world environment. For this purpose, the electric motors were equipped with a number of thermocouples with which the temperatures are measured. The precise measurement and recording of the heat flux temperatures is performed using LabVIEW software. The calculations from the thermal analysis coincide with the experimental results and can be used to predict the heat fluxes in different designs and types of cooling systems. The possibilities for improving the cooling and power of standard PMAC electric motors with double stators have been studied and analyzed.

Compact Modeling of Fractal Tree-Shaped Microchannel Liquid Cooling Systems

2011 ◽  
Author(s):  
Cheng Chen ◽  
Emad Samadiani ◽  
Bahgat Sammakia
Keyword(s):  
Flow Rate ◽  
Cooling System ◽  
Maximum Flow ◽  
Heat Fluxes ◽  
Compact Model ◽  
Temperature Fields ◽  
Compact Modeling ◽  
Liquid Cooling ◽  
Cooling Systems ◽  
Full Field

Demands for higher computational speed and miniaturization have already resulted in extremely high heat fluxes in microprocessors. Fractal tree-shaped microchannel liquid cooling systems are novel heat transfer enhancement systems to keep the temperature of the microprocessors in a safe range. Due to the complexity of these systems, their full field numerical modeling for simulation of the flow and temperature fields is too time consuming and costly, particularly to be used within iterative optimization algorithms. In this paper, a quick but still accurate compact modeling approach based on Flow Network Modeling (FNM) is introduced for analysis of the flow filed in fractal microchannel liquid cooling systems. The compact method is applied to a representative fractal microchannel cooling system and the obtained velocity and flow rate distribution are validated against a full Computational Fluid Dynamics (CFD)-based model for three different designs. The compact model shows good agreement with the CFD results and robustness on different designs, while requiring much less computational capability and time. Afterwards, the compact model is used for optimization of the geometry of the fractal cooling system to achieve maximum flow rate and uniform flow distribution among the channels for a fixed pressure drop.

Experimental study of oil cooling systems for electric motors

2015 ◽  
Vol 75 ◽  
pp. 1-13 ◽  
Author(s):  
Tanguy Davin ◽  
Julien Pellé ◽  
Souad Harmand ◽  
Robert Yu
Keyword(s):  
Experimental Study ◽  
Electric Motors ◽  
Cooling Systems

Thermal Analysis of a Microhotplate - An Experimental Study

2020 ◽  
Vol 29 (3) ◽  
pp. 408-417
Author(s):  
Gaurav Saxena ◽  
Dushyant Singh ◽  
Maitraye Raaj
Keyword(s):  
Thermal Analysis ◽  
Experimental Study

scholarly journals Thermal Analysis of Cold Plate with Different Configurations for Thermal Management of a Lithium-Ion Battery

Batteries ◽  
2020 ◽  
Vol 6 (1) ◽  
pp. 17
Author(s):  
Seyed Saeed Madani ◽  
Erik Schaltz ◽  
Søren Knudsen Kær
Keyword(s):  
Thermal Analysis ◽  
Temperature Distribution ◽  
Lithium Ion Battery ◽  
Thermal Management ◽  
Electric Vehicles ◽  
Heat Dissipation ◽  
Lithium Ion ◽  
Cold Plate ◽  
Liquid Cooling ◽  
Cooling Design

Thermal analysis and thermal management of lithium-ion batteries for utilization in electric vehicles is vital. In order to investigate the thermal behavior of a lithium-ion battery, a liquid cooling design is demonstrated in this research. The influence of cooling direction and conduit distribution on the thermal performance of the lithium-ion battery is analyzed. The outcomes exhibit that the appropriate flow rate for heat dissipation is dependent on different configurations for cold plate. The acceptable heat dissipation condition could be acquired by adding more cooling conduits. Moreover, it was distinguished that satisfactory cooling direction could efficiently enhance the homogeneity of temperature distribution of the lithium-ion battery.

Thermal Analysis and Design of the Cryogenic System for 12 MW Offshore Superconducting Wind Turbine

2013 ◽  
Vol 860-863 ◽  
pp. 242-248
Author(s):  
Xiao Yu Li ◽  
Jie He ◽  
Li Ren ◽  
Meng Song ◽  
Kun Nan Cao ◽  
...  
Keyword(s):  
Finite Element Method ◽  
Thermal Analysis ◽  
Previous Analysis ◽  
Cryogenic System ◽  
Thermal Loss ◽  
Electric Motors ◽  
Large Capacity ◽  
Analysis And Design ◽  
Superconducting Coil ◽  
Multilayer Insulation

Applied superconductivity technology has been thought of being utilized in manufacturing large capacity wind turbines for several years. It is regarded as the only way to minify the volume and mass for large electric motors. Cryogenic system for the generator is fatally important, to create the necessary low temperature maintaining field windings superconducting state. Aiming at designing a reliable cryogenic system for large capacity as 12 MW superconducting generators field winding, in this paper, thermal numerical calculation and analysis for the superconducting coil with cold shield with multilayer insulation (MLI) are done, a dynamic model is established with finite element method (FEM) to verify the previous analysis. Optimization is also done to reduce the thermal loss. Proposal for the numbers of Cryocoolers needed and their layout in generator are given.

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