Control System Simulation Analysis of a Bearingless Permanent Magnet Synchronous Motor with Midpoint Injection

Single-Winding Bearingless Permanent Magnet Synchronous Motor (SW-BPMSM), a novel motor type, holds significant promise for a wide range of applications in both industrial and aviation domains. The primary research objective of this paper is the SW-BPMSM with midpoint injection type. The aim is to investigate its performance advantages and analyze its system control performance. To accomplish this objective, the paper begins by introducing the fundamental structure and operational principles of the SW-BPMSM with midpoint injection. Following this, mathematical models describing the radial suspension force and electromagnetic torque are derived. Finally, based on the working principles of the motor, the control system structure was established, and simulations of the control system were conducted using Matlab/Simulink. The performance of the motor under various operating conditions was analyzed. The simulation results demonstrate the motor's ability to generate stable electromagnetic torque and radial suspension force, as well as its robust resistance to interference. These findings are expected to facilitate the further adoption and advancement of this motor technology in practical applications.