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The radial and lévitation forces, necessary to suspend a double conical permanent magnet synchronous rotor, are generated by superposition of the rotor field and two stator fields with one pole pair difference. Due to the superposition of the fields in the air gap, some force interferences are disturbing the levitated drive. The origin of these perturbations are explained and described in a simplified...
The pole placement control with motion decoupling and integral action, according to the full modal synthesis, is addressed in this paper, to control a 1 kW, 18000 min−1 double conical Bearingless Permanent Magnet Synchronous Motor prototype. An electro-mechanical model of the prototype is derived analytically together with the design of the control scheme. The design of a pole placement scheme, with...
A synthetic test bench with two different voltage sources is described to investigate bearing currents, based on a lumped element model of an electrical motor. The aim of this synthetic test bench is to reproduce the voltage and current wave form at the bearing, which actually happen in bearings of inverter-fed motors, to investigate the influence of these electric quantities on bearing failures.
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