关键词: 磁轴承设计, 储能飞轮, 电磁仿真, 转子动力学仿真

Abstract: A five-degree-of-freedom support scheme multi-physical field optimization design was carried out for the energy-storage flywheel with a rotor weight of 9 kg and a rotating speed of 100 000 r/min, including the design and simulation analysis of electromagnetic field, rotor dynamics, stress field and temperature field. The iron losses of homopolar permanent magnet biased radial magnetic bearing (HOPRMB) and heteropolar permanent magnet biased radial magnetic bearing (HEPRMB) were compared through electromagnetic field simulation. HOPRMB was selected to realize non-contact support with two-degree-of-freedom radial levitation to reduce the loss of magnetic bearing in the energy storage flywheel system. The permanent magnet biased axial-radial magnetic bearing (PARMB) was selected to realize non-contact support with three-degree-of-freedom levitation to reduce the axial length of the flywheel system. Theoretical analysis and parameter design process oftwo-degree-of-freedom HOPRMB and three-degree-of-freedom PARMB were presented. The multi-physical field simulation results show that the magnetic suspension bearing support system involved can meet the design requirements of the energy storage flywheel.

Key words: design of magnetic bearing, energy storage flywheel, electromagnetic simulation, rotor dynamics simulation