Title :
Design and analysis of a permanent magnet motor integrated with journal bearing
Author :
Wang, Fengxiang ; Xu, Longya
Author_Institution :
Dept. of Electr. Eng., Ohio State Univ., Columbus, OH, USA
Abstract :
In the application for artificial hearts, the journal bearing is one part of the integrated magnetic design of the “inside-out” PM motor. During blood pumping, a small quantity of blood enters the gap between the rotor and stator, creating a thin hydrodynamic film which separates and lubricates the rotating and stationary surfaces. In this integrated design, the stator-rotor axial magnetic attraction also acts as the thrust “journal bearing”. This paper presents a design and detailed analysis for a PM motor integrated with journal bearing. Application of Halbach array permanent magnet structure for high torque density, cogging torque minimization, and design optimization by 2-D and 3-D finite element method specifically for a blood-pump system are discussed
Keywords :
artificial organs; finite element analysis; machine bearings; permanent magnet motors; pumps; rotors; stators; torque; 2-D finite element method; 3-D finite element method; Halbach array permanent magnet structure; artificial hearts; blood pumping; blood-pump system; cogging torque minimization; design optimization; high torque density; inside-out PM motor; integrated magnetic design; journal bearing; lubrication; permanent magnet motor; rotating surfaces; rotor; stationary surfaces; stator; stator-rotor axial magnetic attraction; thin hydrodynamic film; thrust journal bearing; Artificial heart; Blood; Hydrodynamics; Magnetic analysis; Magnetic levitation; Magnetic separation; Permanent magnet motors; Rotors; Stators; Torque;
Conference_Titel :
Industry Applications Conference, 1997. Thirty-Second IAS Annual Meeting, IAS '97., Conference Record of the 1997 IEEE
Conference_Location :
New Orleans, LA
Print_ISBN :
0-7803-4067-1
DOI :
10.1109/IAS.1997.643003
