Dissertation > Excellent graduate degree dissertation topics show

Research on Thermal Calculation of Permanent-Magnet Machines

Author: HuShuHuan
Tutor: TangRenYuan
School: Shenyang University of Technology
Course: Motor and electrical
Keywords: Permanent-Magnet Machine Flow Field Temperature Field Finite Element Method
CLC: TM351
Type: Master's thesis
Year: 2009
Downloads: 417
Quote: 5
Read: Download Dissertation

Abstract


With the development of single-machine capacity, heat generation and cooling are becoming more and more important. It is one of the most important issues in the process of electric machine design and has impact on operating life and operational reliability of the electric machine. Temperature field of permanent-magnet machines is studied in this thesis. Heat generation and temperature distribution during the steady-state operation are researched. The practical operation of the permanent-magnet is a complex physical process, and the heat transfer process in electric machine is also very complex. In order to describe this physical process it is necessary to exactly calculate the value of the thermal parameter of every component of the machine.Losses of permanent-magnet machine are represented firstly in the thesis, and equivalent insulation material is used. Winding insulations and insulation layers are usually ignored in previous temperature field calculation. Although winding insulation is thin, the whole area of stator winding insulation may exceed that of one piece of winding. The coefficient of heat conductivity of insulation materials is very small and has influence on temperature field variation. So it will have a certain effect on the calculation precision. The insulation layers are very thin and the stator winding insulation distributes thickly in the slot, which make the meshing more complex. In order to simplify the calculation process on the basis of acceptable calculation precision, the stator winding insulations are treated with equivalent method in this paper.Second, coefficients of heat conductivity in electric machines are corrected by machines with the same material and temperature test results. According to fluid mechanics and heat transfer theory, fluid field of 90kW permanent-magnet machine is analyzed and calculated. Then air speed distribution diagram is attained. Coefficients of heat transmission are determined by experience formulas. 3D temperature field is calculated and coefficients of heat transmission are corrected by temperature test results. 2D temperature field is calculated and compared to test results, and then the error of 2D results and 3D results is analyzed.Finally, according to the corrected coefficients of heat conductivity and transmission, fluid field and temperature field of 950kW prototype model are calculated by the software of ANSYS with the finite element method. Temperature distribution of the prototype model is attained. And the temperature distributions of the stator, windings and insulations are also analyzed, which offer an instruction to electric machine design.

Related Dissertations

  1. Research on the Structure and Characteristics of Permanent Magnetic Coupling,TH139
  2. Study on Contact Fatigue Life Based on Grease Variation with Temperature,TH117.22
  3. Simulation Analysis on Temperature Stress of RCC Arch Dam and Its Construction Joints Design Research,TV642.2
  4. Analysis and Study of Abutment Stability in Concrete High Arch Dam by Three-Dimensional Nonlinear Finite Element Method,TV642.4
  5. Stability Analysis of Roller Compacted Concrete Gravity Dam Based on Time-history Method,TV642.2
  6. The Effect of Frequencycontron on Flow Fields Environment in Bulk Curing Barn and Quality of Flue Cured Tobacco,S572
  7. Research on Intelligent Aerial Bomb for Forest Fire Fighting,S762
  8. On the Simulant Research of the Pneumatic Cleaning Mechanism of Mini-combine Harvester,S225.3
  9. Parametric Design of Flow Channels and Analysis of the Flow Field,TP391.72
  10. The Study on the Vestibular 3d Reconstruction of Guinea Pig and the Numerical Simulation of Temperature Field,R764
  11. Numerical Simulation of Displacement Ventilation’s Influence on Air Quality Indoor,TU834
  12. Theoretical Study and Simulation of Hydrocyclone Separator,TH237.5
  13. The Band Structure in 2D Resonant Phononic Crystal,O735
  14. Research on Sensing with High Birefringent Photonic Crystal Fiber,TP212
  15. Analysis of the Thermal Lens Effect on Yb: YAG Thin-Disk Laser Crystal,TN248
  16. Research on Sheet Metal CNC Cutting 3D Simulation,TG48
  17. Study on Temperature Field and Residual Stress Model Research of MEMS Accelerometer,TH824.4
  18. Numerical and Experimental Studies for Multi-Cracks of Asphalt Pavement with Semi-Rigid Basement Asphalt,U416.217
  19. The Study of Complex Monitoring for Energy Transfer Based on Temperature Field Reconstruction,TU111
  20. Study on the Influence of Various Defects on the Characteristics of Infrared Photonic Crystal Fiber,TN253
  21. Applications of Vector Finite Element Method to Simulate Logging While Drilling Resistivity Tools,P631.83

CLC: > Industrial Technology > Electrotechnical > Motor > A special motor > Permanent magnet motor
© 2012 www.DissertationTopic.Net  Mobile