Active Magnetic Bearings and Self-Bearing Motors

The book "Active Magnetic Bearings and Self-Bearing Motors" offers a comprehensive examination of the modeling and control of magnetic levitation systems, particularly active magnetic bearings (AMBs) and self-bearing motors (SBMs). The dissertation discusses the functioning of AMBs in the initial chapters, which are used for the levitation of high-speed shafts in various applications. Fundamental modeling approaches, parameter identification, and feedback control designs are presented, which are practically demonstrated on a commercially available test bench. The various control strategies aim to achieve basic stabilization, vibration suppression, and trajectory tracking. In the later chapters, the SBM is addressed, which levitates and rotates a shaft simultaneously to provide a compact and cost-effective solution. The dissertation highlights the latest developments in SBM design that utilize the Lorentz force for levitation, in contrast to AMBs that rely on the Maxwell force. Topics include the characterization of the levitation force and motor torque, as well as dynamic modeling and necessary control approaches for robust performance.