Title :
Static Characteristics of Novel Air-Cored Linear and Rotary Halbach Permanent Magnet Actuator
Author :
Ping Jin ; Yue Yuan ; Guo Jian ; Heyun Lin ; Shuhua Fang ; Hui Yang
Author_Institution :
Sch. of Energy & Electr. Eng., Hohai Univ., Nanjing, China
Abstract :
This paper investigates the static characteristics of a novel air-cored linear and rotary permanent magnet actuator (LRPMA) with a Halbach permanent magnet array. By the given magnetization distributions and boundary conditions in the cylindrical coordinate system, the magnetic field distributions of the actuator are analytically analyzed using the magnetic scalar potential and the modified BESSEL functions. A 3-D finite-element (FE) model is established to validate the correctness of the analytical results. Analytical linear electromagnetic force and rotary electromagnetic torque, respectively, are derived and verified using the FE method for the characterization and optimization design of the air-cored Halbach LRPMA.
Keywords :
finite element analysis; magnetic actuators; magnetic fields; magnetisation; permanent magnets; 3D finite-element model; FEA; Halbach permanent magnet array; LRPMA; air-cored linear-rotary permanent magnet actuator; analytical linear electromagnetic force; boundary conditions; cylindrical coordinate system; magnetic field distributions; magnetic scalar potential; magnetization distributions; modified BESSEL functions; rotary electromagnetic torque; static characteristics; Actuators; Arrays; Finite element analysis; Iron; Magnetic analysis; Permanent magnets; Torque; Analytical method; linear and rotary Halbach permanent magnet (PM) actuator; linear electromagnetic force; magnetic scalar potential (MSP); rotary electromagnetic torque;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2013.2284277
