Research on the Electromagnetic-Heat-Flow Coupled Modeling and Analysis for In-Wheel Motor
Abstract
:1. Introduction
2. Structure of IWM
2.1. Basic Structure of IWM
2.2. Basic Parameters of IWM
3. Analysis of Electromagnetic-Heat-Flow Coupling Factors
3.1. Analysis of the Coupling Factors of Electromagnetic Field and Temperature Field
3.1.1. Influence Factors of Electromagnetic Field on Temperature Field
(1) Core Loss
(2) Eddy Current Loss of the PM
(3) Copper Loss
3.1.2. Influence of Temperature Field on Electromagnetic Field
(1) Influence of Temperature on the Conductivity of Materials
(2) Influence of Temperature on Residual Flux Density of PM
3.2. Analysis of the Coupling Factors of Temperature Field and Flow Field
3.2.1. Influence of Temperature on Thermal Conductivity of Fluid
3.2.2. Influence of Temperature on the Specific Heat Capacity of Fluid
3.2.3. Influence of Temperature on the Dynamic Viscosity of Fluid
3.2.4. Influence of Temperature on the Density of Fluid
3.3. Analysis of the Coupling Factors of Electromagnetic Field and Flow Field
4. The Establishment of Electromagnetic-Fluid-Thermal Coupling Model for IWM and Model Validity Verification
4.1. The Establishment of the Finite Element Model of IWM
4.2. Determination of Boundary Conditions and Material Properties of IWM
4.2.1. Determination of Material Properties of IWM
4.2.2. Determination of Boundary Conditions of IWM
4.3. Grid Division of IWM
4.4. Model Validity Verification
4.5. Three-Field Coupling Calculation Method
5. Analysis of Electromagnetic-Heat-Flow Coupling, Based on Working Conditions
5.1. Comparison and Analysis of the Simulation Results of Unidirectional Coupling and Bidirectional Coupling
5.2. Vehicle Working Condition Setting
5.3. Analysis of Electromagnetic Field Simulation Results of IWM
5.4. Analysis of Temperature Field Simulation Results of IWM
5.5. Analysis of Flow Field Simulation Results of IWM
5.6. Variation of Maximum Temperature of IWM at Different Flow Rates
6. Results
Author Contributions
Funding
Conflicts of Interest
References
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Name | Numerical Value | Name | Numerical Value |
---|---|---|---|
Stator outer diameter | 310 mm | Rotor inner diameter | 200 mm |
Stator inner diameter | 240 mm | Air gap length | 0.9 mm |
Stator length | 69 mm | Rotor length | 71 mm |
Diameter of inlet and outlet | 15 mm | Rib width | 4 mm |
Channel cross section | 232 mm2 | Channel height | 10 mm |
Name | Numerical Value | Name | Numerical Value |
---|---|---|---|
Rated power | 15 KW | Speak speed | 1100 rpm |
Peak power | 54 KW | Rated speed | 1000 rpm |
Component | Material | Thermal Conductivity | Density | Specific Heat Capacity |
---|---|---|---|---|
Stator and rotor core | DW465-50 | 40/40/0.95 | 7700 | 426 |
Winding | copper | 379 | 8900 | 390 |
PM | NdFeB | 6.16 | 7800 | 460 |
Insulation layer | Insulation material | 0.3 | 1300 | 1340 |
Housing | 45 steel | 50.2 | 7850 | 480 |
Air | Air | 0.0267 | 1.29 | 1000 |
Maximum Temperature (°C) | ||||
---|---|---|---|---|
Stator Core | Rotor Core | Winding | PM | |
electromagnetic-heat-flow | 54.2 | 52.7 | 57.6 | 51.3 |
flow-heat | 50.1 | 47.1 | 53 | 46.2 |
Maximum Temperature (°C) | ||||
---|---|---|---|---|
Stator Core | Rotor Core | Winding | PM | |
flow-heat coupling factors | 54.2 | 52.7 | 57.6 | 51.3 |
without fluid-heat coupling factors | 52.1 | 50.7 | 55.1 | 50.2 |
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Xue, H.; Tan, D.; Liu, S.; Yuan, M.; Zhao, C. Research on the Electromagnetic-Heat-Flow Coupled Modeling and Analysis for In-Wheel Motor. World Electr. Veh. J. 2020, 11, 29. https://doi.org/10.3390/wevj11020029
Xue H, Tan D, Liu S, Yuan M, Zhao C. Research on the Electromagnetic-Heat-Flow Coupled Modeling and Analysis for In-Wheel Motor. World Electric Vehicle Journal. 2020; 11(2):29. https://doi.org/10.3390/wevj11020029
Chicago/Turabian StyleXue, Haojie, Di Tan, Shuaishuai Liu, Meng Yuan, and Chunming Zhao. 2020. "Research on the Electromagnetic-Heat-Flow Coupled Modeling and Analysis for In-Wheel Motor" World Electric Vehicle Journal 11, no. 2: 29. https://doi.org/10.3390/wevj11020029