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Journals and Conferences
In this paper a positioning control of a nonlinear elastically coupled two-mass system is presented. Structures of two-mass systems can often be found e.g. in robotics or machine tools. The contained mechanical parts, like gears and shafts, can lead to limited cycles and stick-slip effects. In order to avoid the unwanted effects an H/sub /spl infin//… (More)
The torque and unbalanced magnetic forces in a small flux concentrating permanent magnet transverse flux machine (FCPM-TFM) in segmented compact structure, which are the resultants of the tangential; axial and normal magnetic forces, respectively, are in general influenced by pole-teeth-winding configuration. The paper calculates the torque and unbalanced… (More)
This paper presents a new analytical model of an induction machine which can consider saturation effects in inductances. The principle is based on the idea that the air gap flux can be used to characterize the analytic function of the leakage and magnetizing inductances.
Elastically coupled multi-mass systems are found in many industrial applications, like wind energy plants or in robotics. Dynamic load changes often cause peaks in the shaft torsion torque and result in damages to the system. This paper presents a control strategy to reduce the dynamic loads on the drive train and the stress in wind turbines and other… (More)
The future for wind power generation in Germany is offshore wind energy. The preferred concept for power transmission over long distances from the offshore wind farm to the mainland is the high voltage direct current (HVDC) power transmission. In this paper a new transmission concept based on HVDC is presented.
Controlling a multi-mass system is a common problem in industrial automation. Varying or even unknown parameters cause the difficulty of the control. A powerful tool in order to control systems with uncertain parameters is a robust H∞-control. Unfortunately the complex structure and the mathematical theory prevent known H∞ controllers from… (More)
Transverse flux machine (TFM) useful for in-wheel motor applications is presented. This transverse flux permanent magnet motor is designed to achieve high torque-to-weight ratio and is suitable for direct-drive wheel applications. As in conventional TFM, the phases are located under each other, which will increase the axial length of the machine. The idea… (More)
Flux concentrated permanent magnet transverse flux machine (FCPM-TFM) that is designed to achieve a compact design for in-wheel applications, has been set under test experiments to verify the published investigations that are demonstrated in and achieved through many computer simulations via using FLUX3D, a 3D finite element (FE-) package from Cedrat. The… (More)
This paper investigates the existing structures of transverse flux machines (TFMs) that can be constructed as an outer rotor in-wheel motor which is suitable for low speed applications. As the main characteristic of TFM is providing the best torque density at low speeds, it would be a suitable choice and having a great future for low speed mobile platforms.… (More)
In this paper the flux linkage between the permanent magnets in the rotor and the stator core of a Transverse Flux machine is investigated, with a special focus on the flux concentrating setup, which allows to utilize the core materials up to their saturation limits. FEM simulations are carried out to find the relation between the flux linkage and the size… (More)