Digital control system design and analyses of a 3-phase bearingless induction motor

The overall conguration of a magnetic suspension decoupling control system is designed to realize the reliable digital control of a 3-phase bearingless induction motor whose rotor windings are not pole-specic. Based on a digital signal processor complementary metal-oxide semiconductor chip, the digital control hardware and software systems are analyzed and designed. In this paper, the calculation and regulation of the motor rotational speed, correction and regulation methods of the radial displacements, calculation and compensation algorithms of the unilateral magnetic pulls, induction compensation algorithm of the eective suspension control current, current regulation, and space-vector pulse width modulation algorithms, are presented in detail. The experimental results verify the feasibility and practicability of the designed decoupling digital control system of the 3-phase bearingless induction motor.

[1]  Lei Huang,et al.  Sensorless Operation of an Inset PM Bearingless Motor Implemented by the Combination Approach of MRAS and HF Signal Injection , 2006, 2006 6th World Congress on Intelligent Control and Automation.

[2]  M. A. Rahman,et al.  A Novel Middle-Point-Current-Injection-Type Bearingless PM Synchronous Motor for Vibration Suppression , 2011, IEEE Transactions on Industry Applications.

[3]  Gang Yang,et al.  Independent Control of Average Torque and Radial Force in Bearingless Switched-Reluctance Motors With Hybrid Excitations , 2009, IEEE Transactions on Power Electronics.

[4]  Seong-yeol Yoo,et al.  Toroidally-Wound Self-Bearing BLDC Motor With Lorentz Force , 2010, IEEE Transactions on Magnetics.

[5]  Yuan Lan,et al.  Induction compensation control of bearingless induction motor , 2011, 2011 IEEE International Conference on Mechatronics and Automation.

[6]  José Andrés Santisteban,et al.  An Improved Control System for a Split Winding Bearingless Induction Motor , 2011, IEEE Transactions on Industrial Electronics.

[7]  Johann W. Kolar,et al.  Robust Angle-Sensorless Control of a PMSM Bearingless Pump , 2009, IEEE Transactions on Industrial Electronics.

[8]  Shenghua Huang,et al.  General Analytical Models of Inductance Matrices of Four-Pole Bearingless Motors With Two-Pole Controlling Windings , 2009, IEEE Transactions on Magnetics.

[9]  Akira Chiba,et al.  An air-gap-flux-oriented vector controller for stable operation of bearingless induction motors , 2000 .

[10]  Fang Lin Luo,et al.  Direct Control of Radial Displacement for Bearingless Permanent-Magnet-Type Synchronous Motors , 2009, IEEE Transactions on Industrial Electronics.

[11]  A. Chiba,et al.  A stable operation of induction type bearingless motor under loaded conditions , 1996, IAS '96. Conference Record of the 1996 IEEE Industry Applications Conference Thirty-First IAS Annual Meeting.

[12]  M.A. Rahman,et al.  A Novel Magnetic Suspension-Force Compensation in Bearingless Induction-Motor Drive With Squirrel-Cage Rotor , 2007, IEEE Transactions on Industry Applications.

[13]  A. Chiba,et al.  A PWM harmonics elimination method in simultaneous estimation of magnetic field and displacements in bearingless induction motors , 2011, 2011 IEEE International Electric Machines & Drives Conference (IEMDC).

[14]  Huang Shenghua,et al.  Hardware implement of numerical control system for bearingless induction motor , 2011, 2011 IEEE International Conference on Mechatronics and Automation.

[15]  W. Amrhein,et al.  Nonlinear Feedback Control of a Bearingless Brushless DC Motor , 2010, 2005 International Conference on Power Electronics and Drives Systems.

[16]  Akira Chiba,et al.  Evaluation of Magnetic Suspension Performance in a Multi-Consequent-Pole Bearingless Motor , 2011, IEEE Transactions on Magnetics.