scholarly journals Research on the Electromagnetic-Heat-Flow Coupled Modeling and Analysis for In-Wheel Motor

2020 ◽  
Vol 11 (2) ◽  
pp. 29
Author(s):  
Haojie Xue ◽  
Di Tan ◽  
Shuaishuai Liu ◽  
Meng Yuan ◽  
Chunming Zhao
Keyword(s):  
Electromagnetic Field ◽  
Temperature Field ◽  
Flow Field ◽  
Weak Coupling ◽  
Working Condition ◽  
Electromagnetic Torque ◽  
Coupling Analysis ◽  
Field Coupling ◽  
Field Temperature ◽  
Coupling Factors

In this paper, a 15 KW in-wheel motor (IWM) is taken as the research object, and the coupling factors among the electromagnetic field, temperature field and flow field are analyzed, and the strong and weak coupling factors between the three fields are clarified, and by identifying the strong and weak coupling factors between the three fields, a three-field coupling analysis model for IWM with appropriate complexity is established, and the validity of the model is verified. In a certain driving condition, the electromagnetic field, temperature field and flow field characteristics of IWM are analyzed with the multi-field coupling model. The result shows that, after the IWM runs 8440 s under driving conditions, in this paper, the IWM electromagnetic torque of the rated working condition is 134.2 Nm, and IWM the electromagnetic torque of the peak working condition is 451.36 Nm, and the power requirement of the motor can be guaranteed. The highest temperature of the IWM is 150 °C, which does not exceed the insulation grade requirements of the motor (155 °C), the highest temperature of the permanent magnet (PM) is 65.6 °C, and it does not exceed the highest operating temperature of the PM, and ensures the accurate calculation of components loss and the temperature of the motor. It can be found, through research, that the electromagnetic torque difference between unidirectional coupling and bidirectional coupling is 3.2%, the maximum temperature difference is 7.98% in the three-field coupling analysis of IWM under rated working conditions. Therefore, it is necessary to consider the influence of coupling factors on the properties of motor materials when analyzing the electromagnetic field, temperature field and flow field of IWM; it also provides some reference value for the simulation analysis of IWM in the future.

Research on Temperature Rise of Wet Clutch Based on Multi-Field Coupling

2019 ◽  
Author(s):  
Bangzhi Wu ◽  
Datong Qin ◽  
Jianjun Hu ◽  
Qing Zhang
Keyword(s):  
Temperature Field ◽  
Numerical Calculation ◽  
Flow Field ◽  
Field Distribution ◽  
Working Conditions ◽  
Temperature Rise ◽  
Automatic Transmission ◽  
Calculation Model ◽  
Field Coupling ◽  
Wet Clutch

Abstract Wet clutch is widely used in vehicle power transmission, especially in dual clutch automatic transmission. However, due to the unclear understanding of clutch temperature distribution and its influencing factors, the clutch is prone to excessive temperature rise or even wear under severe working conditions or continuous starting conditions. In this paper, the finite element model of stress field distribution of friction pair is established by considering the non-uniform fixed constraint of clamping spring and the non-uniform contact of hydraulic cylinder. Based on the inclined groove structure of the friction plate, the numerical calculation model of the flow field in the groove is established by the finite volume method. On this basis, considering the time-varying characteristics of stress distribution and cooling flow field distribution of clutch friction pairs, a numerical calculation model of clutch temperature field is established, and a multi-field coupling calculation method of clutch is proposed. The distribution of temperature field under different working conditions during clutch engagement is obtained by numerical calculation. The results show that the temperature rise of clutch depends on the target speed of the clutch driving end and the load on the driven end. The research results can provide guidance for the design and control of the clutch.

scholarly journals Specific features of thermal deforming of composite inductors during magnetic-pulse processing of materials

2021 ◽  
pp. 127-130
Author(s):  
Galina Ottovna Anishchenko ◽  
Vladimir Ivanovich Konokhov ◽  
Denis Vladimirovich Lavinsky
Keyword(s):  
Electromagnetic Field ◽  
Temperature Field ◽  
Strain State ◽  
Nonlinear Effects ◽  
Magnetic Pulse ◽  
The Finite Element Method ◽  
Stress Strain ◽  
Pulse Processing ◽  
Stress Strain State ◽  
Field Temperature

The problem of taking into account a non-stationary inhomogeneous temperature field in the analysis of the stress-strain state of inductor systems for magnetic-pulse processing of materials is considered. It follows from the analysis of open information sources that the problem of analyzing a non-stationary temperature field arising from the presence of a non-uniform electromagnetic field and its effect on deformation has been sufficiently studied in relation to induction heating. At the same time, during other operations of magnetic-pulse processing of materials, heating of equipment can cause additional deformations of a significant magnitude, which, in turn, can lead to a loss of equipment performance due to destruction or irreversible deformation. A general approach to the analysis of such problems is proposed, which involves the determination of the spatial-temporal distributions of the quantitative characteristics of the electromagnetic field, temperature field and stress-strain state. The necessity of using numerical methods for carrying out such an analysis has been substantiated. The most effective numerical method is the finite element method, which makes it possible to analyze the unsteady electromagnetic field, temperature field, and stress-strain state within the same calculation scheme. In this case, within the framework of the finite element method, iterative schemes can be created that allow taking into account nonlinear effects. Here, nonlinear effects can be due to the dependence of the mechanical and electro-physical properties of the material on temperature, the plastic nature of deformation, and the need to take into account contact phenomena. The results of complex analysis for a composite single-turn inductor with a dielectric band are presented. The features of contact interaction were taken into account by introducing layers of contact finite elements. The stress-strain state of the inductor is estimated for two variants of the materials used: copper and non-magnetic steel.    

Coupled Numerical Simulation Study on Electromagnetic Field, Flow Field and Heat Transfer in ø210mm Round Billet Mold with M-EMS

2013 ◽  
Vol 651 ◽  
pp. 722-727
Author(s):  
Wei Chen ◽  
Bao Xiang Wang ◽  
Na Zheng ◽  
Ying Chen ◽  
Yong Ping Feng
Keyword(s):  
Electromagnetic Field ◽  
Temperature Field ◽  
Flow Field ◽  
Magnetic Induction ◽  
Electromagnetic Force ◽  
Recirculation Zone ◽  
Current Intensity ◽  
Distribution Law ◽  
Element Analysis ◽  
Round Billet

aking the ∅210mm round billet M-EMS as study subject, a mathematical model coupling electromagnetic field, flow field and temperature field is established by use of Finite Element Analysis Software ANSYS. The distribution law of magnetic induction and electromagnetic force is investigated in mold; the effects of current intensity and frequency on magnetic induction, electromagnetic force, flow and temperature field is studied. The results show that: the values of magnetic induction and electromagnetic force reach its maximum near the edge of billet and became smaller towards the center; in the mold with EMS, the rotary flow is generated, and the flow pattern are upper recirculation zone, rotary zone and down recirculation zone, the location of hot area is moved up compared with the condition without EMS; in the considered parameters range, electromagnetic force and velocity of molten steel increase with the rise of current intensity and frequency.

Analysis and Improvement on Acoustic Performance of Muffler with the Consideration of Temperature and Flow Velocity

2014 ◽  
Vol 875-877 ◽  
pp. 1143-1147
Author(s):  
Yi Xiang Hu ◽  
Shun Ming Li ◽  
Qing Liu
Keyword(s):  
Temperature Field ◽  
Flow Field ◽  
Flow Velocity ◽  
Output Power ◽  
Insertion Loss ◽  
Structural Parameters ◽  
Acoustic Fields ◽  
Influence Of Temperature ◽  
Acoustic Performance ◽  
Field Temperature

Aiming for the acoustic performance of expanded-muffler, the acoustic fields, flow field, temperature field and flow regenerated noise inside the expanded-muffler were studied. Furthermore, with the consideration of temperature and flow velocity, the influence of temperature and flow velocity on acoustic performance was obtained. Based on the research, the acoustic performance of an exhaust muffler was studied. By adjusting the structural parameters, without affecting the engine output power, the insertion loss of muffler has average increased by 5.1 dB (A).

scholarly journals Flow Field, Temperature Field, and Inclusion Removal in a New Induction Heating Tundish with Bent Channels

Metals ◽  
2019 ◽  
Vol 9 (5) ◽  
pp. 561 ◽  
Author(s):  
Fei Xing ◽  
Shuguo Zheng ◽  
Zonghui Liu ◽  
Miaoyong Zhu
Keyword(s):  
Temperature Field ◽  
Flow Field ◽  
Induction Heating ◽  
Flow Characteristics ◽  
Heating Power ◽  
Inclusion Removal ◽  
Good Efficiency ◽  
Heating Efficiency ◽  
Channel Radius ◽  
Field Temperature

In order to study the flow field, temperature field, and inclusion removal in a new induction heating tundish with bent channels, a three-dimensional (3D) transient mathematical model is established. The effects of both the channel radius and heating power on the multi-physical field and inclusion removal in the bent channels’ induction heating tundish are investigated. The results show that the tundish with the channel radius of 3 m shows better flow characteristics than those with the channel radii of 4 m and 2 m. With the increase of channel length, the heating efficiency increases at first, and then decreases, while the radius of 3 m is the best one for heating efficiency. After all the inclusions are placed into the tundish, the radii of 3 m and 2 m show good efficiency regarding inclusion removal, while it is poor when the radius is 4 m. Therefore, 3 m is the optimal radius of the channel in this work. Under the optimal channel radius, the heating power of 800 kW seems better than those of 600 kW and 1000 kW on flow characteristics control in the tundish. The temperature in the receiving chamber rises gradually and distributes quite uniformly with the increasing heating power, and the removal rate of inclusions increases with the increasing heating power.

Sign in / Sign up

Export Citation Format

Share Document