Title :
Thrust ripple free control of cylindrical linear synchronous motor using finite element method
Author :
Kim, Heui-Wook ; Kim, Jung-Won ; Sul, Seung-Ki
Author_Institution :
Dept. of Electr. Eng., Seoul Nat. Univ., South Korea
Abstract :
In this paper, a new vector control method using FEM (finite element method) analysis is proposed to reduce the thrust ripple of a cylindrical linear permanent magnet synchronous motor. The thrust ripple of the linear motor is larger than that of a rotary motor because of the finite length of the stator or mover, and a wide slot opening. This is the basic and inherent problem of linear motors. This thrust ripple can be reduced considering by the variation of the reluctance and MMF according to rotor position. Computer simulations are performed for a cylindrical linear permanent magnet synchronous motor and a prototype motor is built to check the validity of the proposed method. The thrust ripple can be reduced to 0.4% of the rated value by the proposed method
Keywords :
control system analysis computing; electric machine analysis computing; finite element analysis; linear synchronous motors; machine control; machine testing; machine theory; permanent magnet motors; rotors; stators; MMF variation; computer simulation; control simulation; cylindrical linear permanent magnet synchronous motor; finite element method; reluctance variation; rotor position; stator; vector control method; wide slot opening; Computer simulation; Finite element methods; Machine vector control; Magnetic analysis; Permanent magnet motors; Reluctance motors; Rotors; Stators; Synchronous motors; Virtual prototyping;
Conference_Titel :
Industry Applications Conference, 1996. Thirty-First IAS Annual Meeting, IAS '96., Conference Record of the 1996 IEEE
Conference_Location :
San Diego, CA
Print_ISBN :
0-7803-3544-9
DOI :
10.1109/IAS.1996.556995
