Dissertation > Excellent graduate degree dissertation topics show

Torque Analysis and Stator Optimization of a Permanent Magnet Spherical Motor

Author: LiuChao
Tutor: LiBin
School: Tianjin University
Course: Electrical Engineering
Keywords: PM spherical motor MEC method MST method ArtificialImmune Algorithm
CLC: TM351
Type: Master's thesis
Year: 2012
Downloads: 2
Quote: 0
Read: Download Dissertation

Abstract


Traditional robot joints are combined by more than one motor. If the permanentmagnet (PM) spherical motor that can achieve the three-DOF (3-D) motion is used,the mechanical structure is greatly simplified, the position accuracy and the responsespeed of transmission systems are improved. The kind of motor present its uniqueadvantages and potential prospect in engineering application. At present, the study onthe spherical motor is in the early stage of exploration.The paper presents a novel permanent magnet spherical motor. The3-Dsimulation model of the PM spherical motor is established, the magnetic fielddistributions of motor and stator are analyzed by magnetic equivalent circuit (MEC)method, the Maxwell stress tensor (MST) method is applied to analyze theelectromagnetic force and torque, the stator winding inductance is calculated withenergy method, the stator winding’s power consumption is calculated by Ohm’s law.The stator size is optimized with multi-objective immune algorithm.The magnetic field distributions of stator are analyzed by MEC method. For thestator, first, based on the body current model of the PM, the relationship between thecurrent density and PM magnetization was derived, and then the equivalent PM modelof the stator coil was obtained. Furthermore, the PM model and the air region weremeshed in cylindrical coordinates. Taking the symmetry and analogy with electriccircuit into account, the magnetic field boundary conditions were represented by thecorresponding states of nodes and branches of the reluctance elements. Finally, asimplified2-D MEC network was obtained. The expressions of the reluctances andmagnetomotive force sources of the element were deduced, and the spatialdistribution of flux density was analyzed by means of the average magnetic energy.Based on this, the MST method is applied to analyze the electromagnetic forceand torque, the corresponding torque matrix is given, and the relationship between themotor torque and winding location is obtained. The stator winding inductance iscalculated with energy method, the stator winding’s power consumption is calculatedby Ohm’s law Compared with the FEM, this method is proved to have a high accuracyand helpful to the optimization design of the PM spherical motor. The stator size is optimized with multi-objective immune algorithm. Firstly, asummary of previous work is done, Secondly, a novel multi-objective optimizationtheory-artificial immune algorithm-is introduced. Finally, the spherical stator shapeis optimized with the artificial immune algorithm in order to obtain the maximumtorque and maximum inductance and minimum power consumption. The results provethat the artificial immune algorithm is an effective way to optimize the stator shape.

Related Dissertations

  1. Study of Dynamics Decoupling Control and Electrifying Strategy of Permanent Magnet Spherical Motor,TM351
  2. Research on Virtual Prototype Based Ai Fault Diagnosis Method of Pneumatic Actuator,TP273
  3. Research on Multi-level Spam Short Messages Filtering System Based on Text Classification,TN929.532
  4. The Research of the Manipulator Self-recognition Target Based on Immune Ant Colony Algorithm,TP242.62
  5. Study on the Influence of Drive Strategies on the Loss in AC Permanent Magnet Motor,TM351
  6. Design of Low-Cost Pemanent Magnet AC Machines,TM351
  7. Study on Design of Pernanent-Magnet Brushless DC Motor for Washing Machine,TM351
  8. Switching flux permanent magnet motor three-dimensional finite element analysis and experimental research,TM351
  9. Thermoacoustic novel linear generator power system design and thermal calculations,TM351
  10. Appliances with three-phase permanent magnet motor of variable speed,TM351
  11. Wound rotor self- start permanent magnet motor design and performance analysis,TM351
  12. Injection molding machine with a permanent magnet synchronous motor design and performance analysis,TM351
  13. Submersible screw pump direct-drive permanent magnet motor research,TM351
  14. Axially segmented outer claw pole permanent magnet rotor motor performance analysis,TM351
  15. Brushless DC Motor Design and Analysis of Noise,TM351
  16. Belt conveyor with direct-drive permanent magnet external rotor motor research,TM351
  17. The Electromagnetic Design and Analysis of the Low Speed High Torque Rare Earth Permanent Magnet Motor Driving the Beam Pumping Unit,TM351
  18. The Research on a Novel Repulsion Actuator with Permanent Magnetic Holding Structure,TM351
  19. Noise Analysis and Electromagnetic Design of Car Sunroof Motor,TM351
  20. Research on Brushless Doubly-fed Hybrid Poles Permanent Magnet Motor and Its Speed Regulating System,TM351
  21. Flux reverse permanent magnet motor,TM351

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