In order to solve the problem that the rotor radial suspension dynamics model in the double-winding bearingless flux switching permanent magnet motor drive system is seriously coupled

nonlinear and unmodeled with a large proportion

which restrict the rotor radial suspension control performance

a decoupling dynamic model based on suspension current reconstruction is proposed

and based on this

the rotor radial suspension internal model control strategy is further proposed. Firstly

the dynamic model of rotor radial suspension subsystem is derived based on finite element method and Lagrange equation. Then

from the Angle of canceling the known feature terms and uncertainty terms of the kinetic model

the suspension current is reconstructed

and the dynamic model of the decoupling of the two suspension channels is obtained. Finally

based on the proportion and differential factors

the rotor radial magnetic suspension internal model control strategy with fast dynamic response and strong stability is designed. The experimental results demonstrate the effectiveness of the proposed control strategy.