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This paper investigates a three-phase 12/8 poles bearingless doubly salient permanent magnet machine (BDSPMM) with suspending windings, armature windings and PMs on the stator. Based on the topology and operating principle, the influence of PM magnetization length on the performance of the BDSPMM is analyzed and a mathematical model of radial suspending force is deduced from the magnetic circuit....
Bearingless motor is an advantageous choice when a short rotor structure is needed for high-speed applications. Short rotor structure permits higher operational speed without crossing the critical frequencies of the rotor. Effects of the three different winding arrangements are investigated based on rotordynamics, mechanical and electromagnetic analysis. Comparison is done with interior permanent...
Conventional switched reluctance motor undergoes extensive vibration and undesirable acoustic noise caused by the production of significant amount of radial force. The reason behind this is the non-uniformity in air-gap of the motor which can be controlled in order to make it more efficient. A viable solution to pacify this problem is the introduction of bearingless technology with a special winding...
In this paper, the performance analysis of the bearingless switched reluctance motor (BSRM) is studied under rotor asymmetric faults. The rotor asymmetric faults cause acoustic noise and vibrations in BSRM, and also affect the performance of the motor. At different currents and different eccentric faults (i.e. SE, DE and ME) the flux linkages, inductance of suspension and motoring windings are taken...
Recently, bearingless switched reluctance motor (BLSRM) has been received more and more attention. To realize the stable levitation and rotation, the corresponding suspending force and torque should be controlled. In this paper, different from the conventional bearingless SRM control, one independent control scheme for levitation force and torque is presented. In the control, a complex control algorithm...
This paper presentes a bearingless permanent magnet synchronous motor model. Based on this model, the principle of radial force production by interaction of two windings with different pole pair numbers is discussed. Furthermore the finite element validate analysis are presented on ANSOFT. Analysis results, confirming the theoretical predications, are shown.
Vibration is a serious problem in switched reluctance motors (SRMs) for its unbalanced radial force distribution on the rotor during the rotation. The paper analyzes the principle of radial force generation with radial force winding short-circuited in bearingless switched reluctance motors (BSRMs). The short-circuited radial force winding can be operated as a damping winding. A short-circuited control...
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