Design and Modeling of 2 MW AMB Rotor With Three Radial Bearing-Sensor Planes

Design of Thick-Lamination Rotor Configuration for a High-Speed Induction Machine in Megawatt Class

“…The radius of the shaft in the AMB section is roughly determined relative to the active part of the rotor. Next, the specific load capacity based on achievable magnetic pressure (typically 30 -40 N/cm 2 ) and dynamic load factor over 4 is used used to determine the length of the AMBs [19]. Radials AMBs are usually separated from the sensors using a spacer to avoid electromagnetic interference between the sensor and the radial actuator.…”

Dynamics of High-Power Multi-Rotor System

“…However, the more accurate values are taken from electromagnetic FEM simulations (see Fig. 5) or measured experimentally [14]. Additionally, inner current controlled closed-loop dynamics can be identified from the experimental frequency responses.…”

“…To enable better modularity of the design and broader applicability of the single machine variant, in this study, the generalization of AMB supported motor is investigated. We use a case study of a multi-megawatt (MMW) AMBrotor that has been introduced in [13], [14] and [11]. The modularity is achieved by using flexible coupling which can be tailored for the application specific needs, and enables utilization of the same driving motor for various applications.…”

Active Magnetic Bearing Positioning in the Conceptual Design Phase of a High-Speed Electric Machine

“…[4], [5] To improve the scalability and modularity, multiple bearings are proposed in the integrated machine structure to accommodate the design for different applications. [6] The control of the AMBs in the industry still relies on the traditional PID controller and is widely applied in industrial applications due to its robustness and performance, even though the scientific community proposes several developments by applying advanced controls for improved performance. [7] The design and manufacturing of integrated solutions require work and at high power rates, the manufacturability becomes challenging, especially the rotor part, which is operating near the physical limits.…”

“…The AMBs are typically dimensioned based on the static load, i.e. structure own weight, which they should be able to carry and multiplying that with a factor 4-7 [6], also the maximum pressure achievable with magnetic forces are limited [6]. The AMB dimensions (length and outer radius of the magnetic bearings) are important parameters for achieving magnetic levitation.…”