Magnetically Levitated Slice Motors

Nußbaumer, Thomas; Karutz, P.; Zürcher, Franz; Kolar, Johann W.

doi:10.1109/tia.2010.2102731

Cited by 102 publications

(33 citation statements)

References 20 publications

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“…The choice of iron tooth width tw s (relative to the rotor tooth width tw r ) did not change the general characteristic and influenced only higher harmonic orders. The torque components from Equation Equation (4). were evaluated with the help of:…”

Section: Modeling Of the Single-phase Characteristicmentioning

confidence: 99%

“…Other fields of application for bearingless slice motors are also being investigated. These include hermetically sealed process chambers for wafer processing [4], mixers and bioreactors for ultrapure fluid treatment [5], high speed drives for micro-turbines and compressors, [6] and blowers or fans for transporting special gases [7]. Further laboratory prototypes have been implemented, such as the viscometer [8], flywheel [9], and small scale wind turbine [10].…”

Section: Introductionmentioning

confidence: 99%

“…However, in all state-of-the-art bearingless slice motors, the permanent magnets that excite the air gap bias flux are located in the rotor system [4]. Thus, the rotor cross-section of bearingless slice motors bears a strong similarity to rotors of brushless permanent magnet synchronous machines.…”

Section: Introductionmentioning

confidence: 99%

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Modeling and Realization of a Bearingless Flux-Switching Slice Motor

Gruber

Radman

2017

Actuators

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This work introduces a novel bearingless slice motor design: the bearingless flux-switching slice motor. In contrast to state-of-the-art bearingless slice motors, the rotor in this new design does not include any permanent rotor magnets. This offers advantages for disposable devices, such as those used in the medical industry, and extends the range of bearingless slice motors toward high-temperature applications. In this study, our focus is on the analytical modeling of the suspension force torque generation of a single coil and the bearingless motor. We assessed motor performance in relation to motor topology by applying performance factors. A prototype motor was optimized, designed, and manufactured. We also presented the state-of-the-art nonlinear feedback control scheme used. The motor was operated, and both static and dynamic measurements were taken on a test bench, thus successfully demonstrating the functionality and applicability of the novel bearingless slice motor concept.

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Section: Modeling Of the Single-phase Characteristicmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Modeling and Realization of a Bearingless Flux-Switching Slice Motor

Gruber

Radman

2017

Actuators

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“…However, in the case of 5DOF bearingless motor, high cost and large motor size are unavoidable, because five displacement sensors and amplifiers, three units of three-phase inverter and one single-phase inverter are needed. For reducing cost a motor with active positioning of two degree-of-freedom has been studied and applied in the semiconductor industry (1)-(4), (8) and (10). In addition, active positioning of only one degree-of-freedom (1DOF) with magnetic bearing has been studied (11)- (17) .…”

Section: Introductionmentioning

confidence: 99%

Fold Angle of Winding Arrangement in Single-Drive Bearingless Motor with Radial Gap

et al. 2015

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A novel single-drive bearingless motor with a high passive stiffness and wide gap factor is proposed. The singledrive bearingless motor has only one set of three-phase windings. It independently generates both the torque and axial suspension force with only one three-phase inverter and one displacement sensor. Therefore, the single-drive bearingless motors have the advantages of low cost and small size. Only the axial direction z-axis is actively positioned. The other axes, the radial movements x and y and the tilting movements θ x and θ y , are passively stabilized by repulsive passive magnetic bearings. The stator consists of six C-shaped cores and one set of three-phase windings. A novel V-shaped winding structure is proposed to simultaneously generate the torque and active axial force. In this paper, the winding arrangement is presented. In addition, the mathematical calculations are presented in this paper.

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“…The controller of the bearingless machine requires knowledge of both the radial and the angular rotor position in order to ensure stable levitation and high drive performance (Nussbaumer et al 2011). The position is commonly obtained with the use of radial and angular sensor systems that are usually complex and sensitive to harsh environments.…”

mentioning

confidence: 99%