Analysis and Design of Oil Cooling Structure in Motor Shaft of New Energy Vehicle

2021 ◽  
Vol 69 (4) ◽  
pp. 26-34
Author(s):  
Xuejun Chen Chen ◽  
◽  
Lin Ma ◽  
Jun Shen ◽  
◽  
...  
Keyword(s):  
Temperature Rise ◽  
Heat Dissipation ◽  
Cooling System ◽  
Structure Design ◽  
Coupling Analysis ◽  
Efficient Operation ◽  
Fluid Structure ◽  
Analysis And Design ◽  
New Energy ◽  
New Energy Vehicle

Due to the small volume and high-power density of new energy vehicle motor, a large number of losses in the working process are converted into heat accumulation, resulting in temperature rise, which affects its efficient operation. Based on the heat conduction mechanism, four kinds of shaft oil cooling models with different structures are designed, which are comprehensively analysed by using the thermal-fluid-structure coupling analysis method, and the most effective cooling shaft oil cooling model is solved. The simulation is based on Ansoft Maxwell, and the loss results of each component of the motor are obtained, and the loss data is imported into the Fluent software for fluid-structure coupling analysis. By keeping the other variables consistent, the oil flow rate, pressure drop, and temperature rise of four kinds of in shaft oil cooling structures are analysed and compared. The experimental results show that the rectangle around type is the optimal oil cooling structure. In addition, based on the rectangle around oil duct model , the thermal-fluid-structure coupling analysis of the whole motor is carried out, and compared with the motor without cooling system. The temperature rise cloud diagram of the two motors shows that the former has more obvious heat dissipation effect than the latter, and effectively reduces the temperature rise of the motor, especially the rotor and permanent magnet parts, which verifies the rationality of the shaft cooling structure design.

scholarly journals Engine Cooling Device of New Energy Vehicle

2021 ◽  
Vol 2066 (1) ◽  
pp. 012103
Author(s):  
Feifei Liu
Keyword(s):  
Temperature Rise ◽  
Heat Dissipation ◽  
Cooling System ◽  
Permanent Magnet Synchronous Motor ◽  
Flow Channel ◽  
Cooling Device ◽  
Engine Cooling ◽  
New Energy ◽  
Motor Cooling ◽  
New Energy Vehicles

Abstract With the environmental pollution and the shortage of oil resources becoming more and more serious, the development and application of new energy vehicles have attracted more and more attention. Engine is an important part of new energy vehicles, and its performance has a great impact on the vehicle. Compared with traditional industrial motors, new energy vehicle engines have higher requirements on power density, and the improvement of power density poses new challenges to the design of motor cooling system. The purpose of this paper is to study the engine cooling device of new energy vehicles and improve the overall performance of the vehicle. The main research content of this paper is to lay a foundation for the theoretical basis of the engine cooling device, elaborate the working principle of the motor cooling system and the loss of the motor in operation. Then, the heat dissipation system of permanent magnet synchronous motor based on heat pipe is studied experimentally. Aiming at the problem of only considering the temperature rise and ignoring the pressure loss in the flow channel design, a flow channel design method considering the motor temperature rise and the flow channel pressure loss is proposed, and the motor flow channel is optimized. The test results show that the maximum temperature rise at the end is close to 16.56 °C, which is in good agreement with the simulation results. It shows that the heat pipe based heat dissipation system can effectively reduce the temperature rise of motor winding, which provides a new idea for the heat dissipation design of permanent magnet synchronous motor

Calculation of Thermal Performance in Amorphous Core Dry-Type Transformers

2014 ◽  
Vol 986-987 ◽  
pp. 1771-1774 ◽  
Author(s):  
Yan Li ◽  
Yin Jun Guan ◽  
Yang Li ◽  
Tian Yuan Li
Keyword(s):  
Finite Element ◽  
Temperature Distribution ◽  
Energy Saving ◽  
Thermal Performance ◽  
Temperature Rise ◽  
Structure Design ◽  
Iron Core ◽  
Distribution Characteristics ◽  
Element Calculation ◽  
New Energy

The amorphous core dry-type transformer is a new energy-saving transformer. In this paper, a SCBH15-600/10 type amorphous core dry-type transformer is analyzed by 3-D finite element calculation of iron core and winding thermal. Analyzing the temperature distribution characteristics of amorphous transformer, assure the temperature rise highest point. It is in the permitted error between the simulation value and test value. It has important engineering value for the calculation of similar transformer temperature rise; and has certain guiding significance on the amorphous transformer structure design.

The Application of UX Research in New Energy Vehicle Innovation

2019 ◽  
Vol 1 (1) ◽  
Author(s):  
Menghan TAO ◽  
Ning XIAO ◽  
Xingfu ZHAO ◽  
Wenbin LIU
Keyword(s):  
Early Stage ◽  
Rapid Expansion ◽  
The Other ◽  
Innovative Product ◽  
Stage Of Development ◽  
New Energy ◽  
New Energy Vehicle ◽  
The One ◽  
New Energy Vehicles ◽  
Degree Of Innovation

New energy vehicles(NEV) as a new thing for sustainable development, in China, on the one hand has faced the rapid expansion of the market; the other hand, for the new NEV users, the current NEVs cannot keep up with the degree of innovation. This paper demonstrates the reasons for the existence of this systematic challenge, and puts forward the method of UX research which is different from the traditional petrol vehicles research in the early stage of development, which studies from the user's essence level, to form the innovative product programs which meet the needs of users and being real attractive.

scholarly journals Numerical Study of a Cooling System Using Phase Change of a Refrigerant in a Thermosyphon

Energies ◽  
2021 ◽  
Vol 14 (12) ◽  
pp. 3634
Author(s):  
Grzegorz Czerwiński ◽  
Jerzy Wołoszyn
Keyword(s):  
Mass Transfer ◽  
Phase Change ◽  
Heat Dissipation ◽  
Cooling System ◽  
Numerical Study ◽  
Relaxation Parameter ◽  
Phase Changes ◽  
Transfer Time ◽  
Two Phase ◽  
Time Relaxation

With the increasing trend toward the miniaturization of electronic devices, the issue of heat dissipation becomes essential. The use of phase changes in a two-phase closed thermosyphon (TPCT) enables a significant reduction in the heat generated even at high temperatures. In this paper, we propose a modification of the evaporation–condensation model implemented in ANSYS Fluent. The modification was to manipulate the value of the mass transfer time relaxation parameter for evaporation and condensation. The developed model in the form of a UDF script allowed the introduction of additional source equations, and the obtained solution is compared with the results available in the literature. The variable value of the mass transfer time relaxation parameter during condensation rc depending on the density of the liquid and vapour phase was taken into account in the calculations. However, compared to previous numerical studies, more accurate modelling of the phase change phenomenon of the medium in the thermosyphon was possible by adopting a mass transfer time relaxation parameter during evaporation re = 1. The assumption of ten-fold higher values resulted in overestimated temperature values in all sections of the thermosyphon. Hence, the coefficient re should be selected individually depending on the case under study. A too large value may cause difficulties in obtaining the convergence of solutions, which, in the case of numerical grids with many elements (especially three-dimensional), significantly increases the computation time.

scholarly journals Research and Implementation of New Energy Vehicle Servo Motor EMC Testing System

2021 ◽  
Vol 1846 (1) ◽  
pp. 012016
Author(s):  
Peipei Li ◽  
Qingjun Deng ◽  
Yi Zhao ◽  
Jianyu Hu ◽  
Yong Liu ◽  
...  
Keyword(s):  
Testing System ◽  
Servo Motor ◽  
New Energy ◽  
New Energy Vehicle
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