A Full-Period Generating Mode for Bearingless Switched Reluctance Generators
ABSTRACT A bearingless switched reluctance generator (BSRG) is developed, which is operated in full-period generating mode. In the proposed 12/8 bearingless generator, two sets of windings are embedded in the stator. The coils of excitation winding wound on each stator pole are separately controlled, whereas the coils of generation winding are connected in series for each phase. To begin with, the voltage equations of the generator are built for the dynamic analysis model. Then, the mathematical model of radial force is derived for the control of the unbalanced magnetic force. Furthermore, a control algorithm is introduced to generate the required radial forces and output voltage. Finally, dynamic analysis results are included to verify the proposed analysis.
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ABSTRACT: Some types of bearingless switched reluctance motors (BSRMs) have been developed up to now. Their differences mainly focus on different stator-rotor tooth number and winding structures: two layers of windings and single layer of windings for 12/8 or 8/6 BSRM. Their driving principles are just the same: driving current and radial force current are regulated to generate torque and radial force separately. The main difference is the loading of two currents on one single layer of windings or on two separate layers of windings. Further analysis proves that single layer winding structure has more advantages, for example simpler motor and winding structure. Based on the above researches, one 8/6 BSRM with simpler single layer of winding structure has been developed furthermore. Its main characteristic is that the total winding number of motor is decreased from eight to six, which is only two more than four windings of a normal 8/6 SRM. Only six converters are demanded to achieve levitation operation. Its special driving theory and speed regulation technique of the motor by applying three phase windings have been introduced. To testify the new idea, theoretical analysis and practical test have been finished for one test motor. One initial speed of 5000 r/min of levitation operation has been achieved.IEEE Transactions on Industrial Electronics 01/2012; 59(6):2592-2600. · 5.17 Impact Factor
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ABSTRACT: This paper investigates a new converter circuit for a three windings per phase, 6 by 4 switched reluctance generator. This converter utilizes forward topology for the generator converter circuit. The switched reluctance generator and energy conversation are described in this paper. Simulation results are presented finally. This converter output voltage is compared with conventional bifilar converter output voltage.Power Electronics, Drive Systems and Technologies Conference (PEDSTC), 2013 4th; 01/2013
Conference Paper: Study on switched reluctance generator for rural electrification[Show abstract] [Hide abstract]
ABSTRACT: This paper addresses the need for the utilization of cost effective, maintenance free electric machines in stand alone wind energy conversion system meant for rural areas. The suitability of switched reluctance machine as generator for stand alone rural wind energy conversion system has been explored through design and analysis. The design procedure, selection of pertinent topology, static and transient magnetic characteristics has been presented. Finite element analysis has been extensively used to refine as well as to analyze the finalized design.Industrial and Information Systems (ICIIS), 2009 International Conference on; 01/2010