A Study On Control Strategy Of Bearingless Switched Reluctance Motor In Full-period Generating Mode

As a generator, low cost and high reliability of switched reluctance motor (SRM) attracts worldwide attention in resent years. Bearingless Switched Reluctance Generators (BSRGs), which apply bearingless technology in switched reluctance generaor (SRG), not only maintain characteristic of SRM, but also possess high-speed performance of bearingless motor. The dissertation researches a Bearingless Switched Reluctance Motor (BSRM) in full-period generating mode, which can also be generated in excitation-period has combined the excellent characteristics of SRM and the bearingless technology. The dissertation focuses on mathematical models, designing platform of BSRM and control strategies, and mainly does the following work:Firstly, On the basis of introducing the theory of SRM, the levitation and full-period generating principles and related indexes of BSRM are analyzed. A mathematical model is built.Secondly, the composition of digital signal control system of BSRM is presented. Based on this, power converter, A/D converter, and the digital signal under the key chips of DSP F2812 and CPLD EPM1270 are designed. The control program with C language is compiled which offers the stable experiment conditions.Summarizing three modes of SRM, a control strategy is proposed based on the co-ordination control of power voltage and radical forces. The performance of that strategy is investigated in Matlab/Simulink. At last, experiments are completed on the platform of BSRG, realizing the BSRG in full-period mode.