Parameters design and characteristics analysis of E-core radial magnetic bearings

ZHAN Zhi-jun， ZHU Chang-sheng
（School of Electrical Engineering， Zhejiang University， Hangzhou 310027， China）

Abstract： Aiming at the problem that traditional C-type radial magnetic bearing can't meet the design objectives under some certain design requirements，the new E-type radial magnetic bearing was proposed. The expression of the electromagnetic force was deduced and the accuracy was verified. The comparison of magnetic circuit，air gap flux density，stator structure and rotor loss of this two kinds magnetic bearings under the finite element software named ANSYS was elaborated in detail. The result shows that E-core radial magnetic bearing is superior to the traditional C-core radial magnetic bearing under some certain design requirements.
Key words： E-core radial magnetic bearing； C-core radial magnetic bearing； electromagnetic force； magnetic circuit； air gap flux density； stator structure； rotor loss