Electromagnetic performance of the high-speed permanent magnet generator (HSPMG) used a hydrogen fueled vehicle turbocharged drive recovery with random vibration excitation is researched thoroughly in this paper. Random vibration excitation of unevenness of road surface is acquired by random vibration model constructed by comprehensive consideration of road condition. The natural frequencies and mode of vibration needed in random vibration analysis are extracted by modal analysis of the rotor of generator. The radial deformation of the rotor of HSPMG under extreme driving conditions is obtained by random vibration analysis and the maximum value of eccentric displacement in the air gap is 0.0075 mm. But the radial deformation of the rotor of HSPMG under normal driving conditions can be ignored. The electromagnetic performance of HSPMG with uneven air gap length caused by rotor eccentric displacement, such as flux density distribution of air gap, cogging torque, no-load torque and the no-load voltage are further studied, which the performance of HSPMG is optimized.
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