2026 Vol.9 Jun.N03

• Title: Design of Bearingless Synchronous Reluctance Motor Control System Based on Nonlinear Inverse Decoupling Differential Equations
• Name: Wenbin Wan
• Company: East China University of Technology,Fuzhou,344000,China
• Abstract:

  The magnetic field coupling of the stator double winding of a bearingless synchronous reluctance motor causes magnetic saturation effect and cross coupling nonlinearity, resulting in strong coupling between radial suspension force and electromagnetic torque and time-varying parameter drift. When the rotor is eccentric, suspension force control fails and torque pulsation fluctuates widely. Design a control system based on nonlinear inverse decoupled differential equations for this purpose. The hardware uses TMS320F28335 floating-point DSP as the computing core, combined with LA28 NP Hall sensor, AD7606 synchronous sampling chip, and FP75R12KT4 intelligent power module, to achieve dual winding six channel current synchronous acquisition and high-speed driving; The software constructs a full order differential equation considering magnetic saturation and cross coupling nonlinearity, introduces a low order extended state observer for online compensation of time-varying drift and unmodeled disturbances, and adopts a torque channel self disturbance rejection control and suspension force channel PID ESO feedforward composite strategy to achieve dual channel independent decoupling and coordinated control. The experimental results show that the rotor accurately regresses to the center equilibrium position (0,0), and the steady-state suspension error is zero; The designed system synergistically eliminates the control constraints of magnetic saturation and cross coupling from both hardware synchronous acquisition and software inverse decoupling control levels, significantly improving suspension stability and torque output quality under wide operating conditions.

  
  

• Keyword: Bearingless synchronous reluctance motor; Nonlinear inverse decoupling; Extended state observer; Self disturbance rejection control; Torque pulsation suppression
• DOI: 10.12250/jpciams2026090606
• Citation form: Wenbin Wan.Design of Bearingless Synchronous Reluctance Motor Control System Based on Nonlinear Inverse Decoupling Differential Equations[J]. Computer Informatization and Mechanical System,2026,Vol.9,pp.

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