By analyzing the structure of the permanent magnet-electromagnetic hybrid electromagnet,the structure and mathematical model of a new type hybrid electromagnet was put forward.The working conditions of the maglev trains at the normal levitation gap (8 mm),landing gap (16 mm),and sorption gap (3 mm) were calculated by using 3D finite element method.Results indicated that the new hybrid electromagnet satisfies the requirements of the maglev trains; the levitation capability provided by the permanent magnet meets the demand of the maglev trains under normal load; the maximal negative control current through the electromagnet guarantees the permanent magnet not to be demagnetized; the current through the coil is less than the maximum current that the levitation control system can provide at the landing gap as well as at the sorption gap.%通过对永磁-电磁混合电磁铁的结构分析,提出一种新型的电磁铁结构并建立数学模型;在此基础上,应用三维有限元算法,对列车悬浮、起浮和防“吸死”3种工况进行计算.计算结果表明,由永磁磁体提供的悬浮力可满足列车额定载荷的零功率控制要求,控制系统最大反向电流,不会引起永磁磁体失磁,列车在起浮和防“吸死”间隙下所需电磁线圈的电流小于控制系统所能输出的电流最大值.
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