Study on Direct Suspension Force Control of Bearingless Permanent Magnetic Slice Motor

The theory of direct torque control of traditional permanent magnet synchronous motor is applied to the radial suspension force control of a BPMSM in this paper.With the integration of the space vector pulse width modulation, a novelty SVPWM direct suspension force control system for the BPMSM is constructed.On the basis of mathematical modeling,the detail control algorithm is deduced.Then the control system is simulated with Matalab/Simulink,and the results show that the control algorithm is simplified and the torque ripples are restrained，fine static and dynamic performance is brought to the motor.