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Although numerous valuable research has been conducted by many authors, the relation between evolving mechanical faults and their fault-indicating reflections in the electrical signals of rotating electric machinery still requires extensive attention. This lack of information implies serious obstructions in the evolution of applying motor current signature analysis as a complete and reliable condition...
In the complex rotor bearing systems all the components and control are interdependent. Changes in one non-modular element might require complete system redesign. Research on high-speed levitated blowers, pumps and compressors requires ability to test effectively different, often novel or customized, hardware and software components. This work introduces the laboratory test rig of modular construction...
Linear motors have many applications because of their unique characteristic which are different from rotary machines. In particular, Linear Induction Motors (LIMs) have a simple and strong structure, a flexible mechanism, and so on. The most popular application of LIMs is in transportation systems. It is important to investigate the dynamic characteristics of LIMs in order for them to be successfully...
Slotless windings, skewed and rhombic, are widely used in industry. Beside the drive torque, possibly undesired transverse torques and forces are generated, which have not been analyzed previously. An analytical derivation of the torque and force components in all three directions is detailed in this paper for the skewed winding. It is shown that for some winding configurations alternating transverse...
In direct drive applications TFM have been proposed as a powerful alternative. A working TFG and an appropriate power converter were developed. Transient simulation of the system with relevant disturbance influences is done efficiently. A current control is used to optimize power-feedback into the grid. Measurements show positive results.
Tranverse flux machines (TFM) have been proposed as a powerful direct drive alternative. The construction and control of TFM have often proved a problem. In this paper the construction of a working transverse flux generator is presented. Its characteristics are predicted by a detailed FE simulation. Also a current control is designed that compensates unsymmetries and maximizes the power output. Measurements...
In order to improve rotor-impeller suspension performance of the developing ventricular assist device, axial magnetic bearing with various permanent magnet arrangements are designed and fabricated. Separate permanent magnets type stator shows wide linear range and improved force characteristics.
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