Optimisation of Superconducting Motors with YBCO Bulk Material

Oswald, B.; Krone, M.; Söll, M.; Strasser, T.; Oswald, Johannes von; Best, K.-J.

doi:10.1007/978-1-4615-4215-5_89

Cited by 8 publications

(6 citation statements)

References 2 publications

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“…2024, 14, x FOR PEER REVIEW Figure 2. Harmonic forcing, where A-vibration amplitude; ω-circula φ0-phase shift angle; t-time [22].…”

Section: Natural Frequencies Of the Spindle Systemmentioning

confidence: 99%

Optimization of the Control Algorithm for an Active Bearing Support

Turek

2024

Applied Sciences

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This article presents a spindle system with an active bearing support for which the author proposed a control system based on a PID controller. This type of solution improves the mechanical properties of this spindle by changing the stiffness, which results in a wider range of permissible rotational speeds, lower power losses and an increased resistance to vibrations of the entire system. This work describes the mechanism of changing the bearing preload. During tests on a real test stand, the correct functioning of the preload control system was checked for various dynamic conditions. In this work, the author describes the controller used to work in a feedback system, explains how the settings for this controller were selected and their optimization. The assessment of the correct operation of the controller is based on minimizing the amplitude of forced vibrations for the front spindle end by actively controlling the preload of the bearings. This publication is intended to present one of the ways to solve the important problem of limiting the maximum values of the vibration amplitude in the spindle system for its wide range of operating conditions. It also shows how important its optimal settings are in control systems.

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“…2024, 14, x FOR PEER REVIEW Figure 2. Harmonic forcing, where A-vibration amplitude; ω-circula φ0-phase shift angle; t-time [22].…”

Section: Natural Frequencies Of the Spindle Systemmentioning

confidence: 99%

Optimization of the Control Algorithm for an Active Bearing Support

Turek

2024

Applied Sciences

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“…In order to increase the efficiency, the acceleration and the speed of these motors it would be of great interest to provide superconducting types which could promise improved characteristics (small in volume, low in weight) in this respect [12,15,16]. In the case of short motion amplitudes the frequency required for the stator windings is relatively low (below 10 Hz) compared to rotating motors (50 Hz and more), which in fact depends on the pole width of the stator poles and the maximum speed expected.…”

Section: Linear Motors Using Superconducting Tapesmentioning

confidence: 99%

Conceptual design of a SC HTS linear motor

Oswald¹,

Best²,

Maier³

et al. 2004

Supercond. Sci. Technol.

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OSWALD Elektromotoren GmbH, Miltenberg, Germany, is experienced in direct linear motors with high power density. For some special applications the requirements are extremely demanding and almost beyond reach, even for state-of-the-art linear motors operated at room temperature. In order to obtain even higher power density, and hence also increased acceleration, we have to develop a new technology for linear motors. In this paper we propose a round superconducting linear motor. The stator windings will be made of YBCO coated conductors in the shape of double pancake coils. The frequency will be limited to approximately 10 Hz for this application. The actuator will be provided with NdFeB permanent magnets. The special cryogenic design will be discussed. The cooling of the stator will be provided by lN2 at 77 K or lower. The calculated force of this SC linear motor is 10 000 N. The force density will be 2–3 times more than the normal conducting counterpart of the same dimensions.

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“…The HTS plates confine the field to the iron. Alternative designs, based on the same principle are possible where HTS blocks flank a salient iron rotor [8]. The HTS sections are acting as flux barriers, their induced magnetization opposes the field attempting to cross the rotor in the perpendicular direction.…”

Section: Composite Iron/hts Reluctance Machinesmentioning

confidence: 99%

Applications and modelling of bulk HTSs in brushless ac machines

Barnes

McCulloch²,

Dew‐Hughes³

2000

Supercond. Sci. Technol.

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The use of high temperature superconducting material in its bulk form for engineering applications is attractive due to the large power densities that can be achieved. In brushless electrical machines, there are essentially four properties that can be exploited; their hysteretic nature, their flux shielding properties, their ability to trap large flux densities and their ability to produce levitation. These properties translate to hysteresis machines, reluctance machines, trapped-field synchronous machines and linear motors respectively. Each one of these machines is addressed separately and computer simulations that reveal the current and field distributions within the machines are used to explain their operation.

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Optimisation of Superconducting Motors with YBCO Bulk Material

Cited by 8 publications

References 2 publications

Optimization of the Control Algorithm for an Active Bearing Support

Optimization of the Control Algorithm for an Active Bearing Support

Conceptual design of a SC HTS linear motor

Applications and modelling of bulk HTSs in brushless ac machines

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