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

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.

Direct-Drive Permanent Magnet Synchronous Motor in the Application of New Energy Vehicles

2014 ◽  
Vol 953-954 ◽  
pp. 1321-1324 ◽  
Author(s):  
Yuan Fei ◽  
Quan Liu
Keyword(s):  
Permanent Magnet ◽  
Future Development ◽  
Electric Potential ◽  
Permanent Magnet Synchronous Motor ◽  
Development Trend ◽  
Direct Drive ◽  
Analysis Software ◽  
Drive Motor ◽  
New Energy ◽  
New Energy Vehicles

This paper introduces the new energy vehicles drive system for the future development trend, analysis and comparison in the new energy vehicles drive motor technical indicators. By Ansolf analysis software to optimize the motor rotor, to improve the air gap flux density and the electric potential sine.

Application of Micro-Tube Water-Cooling Device for the Improvement of Heat Management in Mixed White Light Emitting Diode Modules

2011 ◽  
Vol 308-310 ◽  
pp. 2422-2427 ◽  
Author(s):  
Maw Tyan Sheen ◽  
Ming Der Jean ◽  
Yu Tsun Lai
Keyword(s):  
Thermal Management ◽  
White Light ◽  
Heat Dissipation ◽  
Cooling System ◽  
Light Emitting Diode ◽  
Thermal Dissipation ◽  
Water Cooling ◽  
Cooling Device ◽  
Heat Management ◽  
Light Emitting

This paper introduces a module using the RGB-based LED design to improve the thermal management of a mixied white light LED and describes a system for heat dissipation in illuminated, high-power LED arrays. Mixed light LEDs can be produced by combining appropriate amounts of light from the red, green and blue LEDs in an array. A LED cooling system, using a micro- tube water-cooling device, was fabricated. Recycling water in the system, gave more efficient convection and the heat created by the LEDs was easily removed, in the experiments. It was shown that micro-tube water-cooling systems rendered an improvement in thermal management that effectively decreases the thermal resistance and provides very good thermal dissipation. Furthermore, the results of experiment and simulation demonstrated that a micro-tube water-cooling system is very effective in heat dissipation in LEDs and the fabrication of practical micro-water tube cooling devices for mixing light LEDs was feasible and useful

scholarly journals Oil-Cooling Method of the Permanent Magnet Synchronous Motor for Electric Vehicle

Energies ◽  
2019 ◽  
Vol 12 (15) ◽  
pp. 2984 ◽  
Author(s):  
Fulai Guo ◽  
Chengning Zhang
Keyword(s):  
Temperature Rise ◽  
Heat Dissipation ◽  
Permanent Magnet Synchronous Motor ◽  
Convection Heat Transfer ◽  
Working Environment ◽  
Installation Space ◽  
Lubricating Oil ◽  
Stator Core ◽  
Torque Density ◽  
Operation Temperature

The typical motor has poor heat dissipation conditions that are limited by the installation space and working environment, and the high operation temperature increase has been a bottleneck to improve the power density and torque density. The inner rotor motor is considered to be the research object, and an oil-cooling structure for end winding and stator core is proposed. The heat inside the motor is mainly carried away through the lubricating oil in the form of heat conduction and convection heat transfer. The 3d motor model was built using the ANSYS software. The temperature field of the motor was simulated to analyze the temperature distribution inside the motor under rated and peak working conditions. The low-speed high-torque test and one-hour temperature-rise test of the motor prototype were performed on a bench built in the laboratory. The comparison between the test results with water-cooled motor shows that the temperature-rise rate of oil-cooled motor with the same electromagnetic structure is slower than that of water-jacketed cooled motor, and the temperature difference between the front and back of the motor decreases by 18 °C in half an hour. The oil-cooled method has a good cooling effect on the stator core and works for longer time under rated conditions.

The impact of the self-sealing coolant channel across the stator core on the electromagnetic performance of the permanent magnet motor

2022 ◽  
pp. 1-23
Author(s):  
Tian Xia ◽  
Falong Zhu ◽  
Peng Kang ◽  
Buyun Sheng ◽  
Yiming Qiu
Keyword(s):  
Permanent Magnet ◽  
Temperature Rise ◽  
Heat Dissipation ◽  
Design Method ◽  
Permanent Magnet Synchronous Motor ◽  
Core Loss ◽  
Synchronous Motor ◽  
Permanent Magnet Motor ◽  
Stator Core ◽  
The Impact

For avoiding the damage of the insulation and permanent magnet, the temperature rise of the PMSM (permanent magnet synchronous motor) should be controlled strictly, it is usually one of the main objectives during improving the output power and torque density beyond the state-of-the-art in motor design. In this research, the coolant channel will be placed within the yoke of the stator core to enhance the heat transfer between the stator core and the coolant. Hydrophobic coating is applied to replace the metal tube for increasing the utilization of the cross area of the coolant channel. The impact of the coolant channel on the performance of the permanent magnet motor is analyzed. A general design method of the coolant channel is presented. The result shows that the change of the stator core loss is within about 10% as the coolant channel is moved away from the slot along the radial direction while the back electromotive force of the motor could keep constant through appropriate design. The impacts of the coolant channels on the magnet performance and the heat dissipation performance could be divided completely with the design method. The method can be applied on various PMSM including SPM (surface-mounted permanent magnet motor) and IPMSM (interior permanent magnet synchronous motor). Sufficient coolant flow could be provide to help conduct the temperature rise of the motor.

scholarly journals Thermal performance analysis and optimal control of power lithium cell thermal management system for new energy vehicles

2020 ◽  
Vol 24 (5 Part B) ◽  
pp. 3375-3383
Author(s):  
Xiangyang Zhao
Keyword(s):  
Thermal Management ◽  
Electric Vehicles ◽  
Management System ◽  
Heat Dissipation ◽  
Calculation Model ◽  
Inlet Temperature ◽  
Lithium Cell ◽  
Thermal Management System ◽  
New Energy ◽  
New Energy Vehicles

To improve the service life and performance of lithium cells in new energy electric vehicles, the thermal management system of lithium cells in new energy vehicles is analyzed through simulation experiments in this research. Firstly, the calculation model of set of cells and cooling structure is built, and then a lithium cell management system is designed. On this basis, the cooling structure of lithium cell is optimized. Finally, the simulation results of the calculation model and the simulation results of the heat dissipation performance of the thermal management system in the cooling structure of lithium cell are analyzed, including influence of three factors (coolant flow, inlet temperature of coolant, and discharge multiple) on the heat dissipation of the thermal management system of lithium cell. The results show that the calculation model constructed in this research is feasible. When the optimal structure, coolant flow value, inlet temperature of coolant, and discharge multiple are determined, the thermal management system of lithium cell has a good cooling effect under the optimal parameters. Therefore, the results of this research can provide a good theoretical basis for heat management and heat dispersion technology in new energy electric vehicles.

scholarly journals Simulation and Multi-Objective Optimization of the Vehicle Thermal Management System of Electric Cars

2021 ◽  
Vol 39 (3) ◽  
pp. 969-978
Author(s):  
Fei Zhao ◽  
Xiaowei Li ◽  
Jiangli Hou
Keyword(s):  
Thermal Management ◽  
High Speed ◽  
Heat Dissipation ◽  
Cooling System ◽  
Thermal Adaptation ◽  
Multi Objective Optimization ◽  
Electric Cars ◽  
Multi Objective ◽  
Engine Cooling ◽  
Medium Speed

The research on the vehicle thermal management (VTM) system is very important for ensuring the driving reliability of electric cars, however, currently there’re few research concerned about this topic, and the existing ones mostly focus on matching and optimizing parameters to improve the management of driving kinetic energy, and the heat dissipation and cooling performance of the cars; however, there isn’t a uniform standard for evaluating these performances, and the research on closed thermal energy management and control based on the evaluation results is pending. This paper studied the simulation and multi-objective optimization of the VTM system of electric cars, and proposed accurate methods and ideas for evaluating the heat dissipation efficiency of the engine cooling system, the cooling efficiency of the air conditioning system, and the thermal management performance of the VTM of electric cars. Based on the model predictive control (MPC) algorithm of vehicle motion control, this paper constructed temperature control optimization objective functions for electric cars under various thermal adaptation working conditions such as low-speed slope climbing, medium-speed gentle slope climbing, high-speed driving, and idling; and it designed several strategies for the coordinated control of the VTM system of electric cars. At last, this paper used test results to verify the effectiveness of the proposed strategies.

Experimental study on the effect of different components collocations on flow of automotive cooling fan

2019 ◽  
Vol 234 (1) ◽  
pp. 270-282 ◽  
Author(s):  
Suping Wen ◽  
Yuwei Hao ◽  
Zhixuan Zhang ◽  
Yifei Wang
Keyword(s):  
Flow Field ◽  
Flow Structure ◽  
Heat Dissipation ◽  
Cooling System ◽  
Flow Data ◽  
Engine Cooling ◽  
Cooling Fan ◽  
Downstream Region ◽  
Piv Measurement ◽  
Series Of Experiments

The flow structure in the downstream region of the cooling fan has great impact on engine heat dissipation. An integrated PIV measurement system was designed and constructed to understand the flow field behind the cooling fan. In order to analyze the influence of interaction of different components on flow structure in downstream region, a series of experiments were conducted in four arrangements at three flow coefficients. The flow field was evaluated by velocity profile, vorticity, and turbulent intensity. These flow data reflect the effect of isolated components and their combinations quantitatively. This work provides useful information for engine cooling system design.

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