Boost Method of Guiding Property for PM Electrodynamic Suspension Based on Asymmetrically Magnetized Halbach PM Array

In recent years, permanent magnet electrodynamic suspension (PMEDS) is gradually becoming the focus of maglev transportation research due to its dynamic self-stability, low cost, and low magnetic reluctance. In this article, a new guiding electromagnetic force boost method for PMEDS based on cross-connected null flux coil (CCNFC) with asymmetrically magnetized Halbach permanent magnet array (AMHPMA) is proposed. In this regard, numerical analysis and finite element solution models are established. The effects of symmetrically magnetized Halbach permanent magnet array (SMHPMA) and AMHPMA on the guiding property of PMEDS based on CCNFC are analyzed. The effectiveness of AMHPMA under CCNFC and non-CCNFC (NCCNFC) on the guidance force enhancement is explored. Then, the boosting effect of guidance attribute is verified by experiment. Moreover, the overheating of the coil by the SMHPMA based on CCNFC is tested. Furthermore, the efficiency of the boost method is analyzed. Finally, based on dynamics model of the PMEDS bogie, the bogie lateral stability of AMHPMA about CCNFC and NCCNFC is compared. The comprehensive results show that without changing the mechanical structure, the proposed scheme can improve the stability of the bogie. The conclusions can provide a reference for the engineering application of the PMEDS.