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描述了一种中低速磁悬浮列车用永磁和电励磁混合悬浮电磁铁结构形式,并利用二维和三维有限元数值方法,分析了满载8 mm气隙额定悬浮、满载18 mm气隙起浮、满载10 mm悬浮和空载3 mm气隙防吸死4种典型工况下悬浮电磁铁的电磁特性。通过计算分析指出,采用新型混合悬浮电磁铁是可行的;与传统纯电励磁方式相比,在小气隙防吸死工况下,其漏磁与大气隙下一样严重。
A structure of permanent magnet and electro-magnetic hybrid suspension electromagnet for medium and low speed maglev train is described. Based on the two-dimensional and three-dimensional finite element method, the full-load air-gap rated suspension with 8 mm air gap, air- Electromagnetic characteristics of suspended electromagnets under four kinds of typical conditions with full load 10 mm suspended and no - load 3 mm air gap. The calculation and analysis indicate that it is feasible to adopt the new hybrid suspension electromagnet. Compared with the traditional pure electric excitation method, the leakage flux is as serious as the air gap under the small air-gap anti-aspiration condition.