Modeling and Implementation of Controller for Switched Reluctance Motor With Ac Small Signal Model

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dc.contributor.authorWang, Xiaoyanen
dc.contributor.committeechairLai, Jih-Shengen
dc.contributor.departmentElectrical and Computer Engineeringen
dc.date.accessioned2014-03-14T20:46:47Zen
dc.date.adate2001-10-19en
dc.date.available2014-03-14T20:46:47Zen
dc.date.issued2001-10-05en
dc.date.rdate2002-10-19en
dc.date.sdate2001-10-18en
dc.description.abstractAs traditional control schemes, open-loop Hysteresis and closed-loop pulse-width-modulation (PWM) have been used for the switched reluctance motor (SRM) current controller. The Hysteresis controller induces large unpleasant audible noises because it needs to vary the switching frequency to maintain constant Hysteresis current band. In contract, the PWM controller is very quiet but difficult to design proper gains and control bandwidth due to the nonlinear nature of the SRM. In this thesis, the ac small signal modeling technique is proposed for linearization of the SRM model such that a conventional PI controller can be designed accordingly for the PWM current controller. With the linearized SRM model, the duty-cycle to output transfer function can be derived, and the controller can be designed with sufficient stability margins. The proposed PWM controller has been simulated to compare the performance against the conventional Hysteresis controller based system. It was found that through the frequency spectrum analysis, the noise spectra in audible range disappeared with the fixed switching frequency PWM controller, but was pronounced with the conventional Hysteresis controller. A hardware prototype is then implemented with digital signal processor to verify the quiet nature of the PWM controller when running at 20 kHz switching frequency. The experimental results also indicate a stable current loop operation.en
dc.description.degreeMaster of Scienceen
dc.identifier.otheretd-10182001-134439en
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-10182001-134439/en
dc.identifier.urihttp://hdl.handle.net/10919/35423en
dc.publisherVirginia Techen
dc.relation.haspartxwthesis.pdfen
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subjectPI Controlleren
dc.subjectSRMen
dc.subjectMotor Driveen
dc.subjectSwitched Reluctance Motoren
dc.subjectAC Small Signal Modelen
dc.titleModeling and Implementation of Controller for Switched Reluctance Motor With Ac Small Signal Modelen
dc.typeThesisen
thesis.degree.disciplineElectrical and Computer Engineeringen
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen
thesis.degree.levelmastersen
thesis.degree.nameMaster of Scienceen

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