Design and Development of High-Frequency Switching Amplifiers Used for Smart Material Actuators With Current Mode Control

dc.contributor.authorLuan, Jiyuanen
dc.contributor.committeechairLee, Fred C.en
dc.contributor.committeememberHua, Guichaoen
dc.contributor.committeememberLai, Jih-Shengen
dc.contributor.departmentElectrical and Computer Engineeringen
dc.date.accessioned2014-03-14T20:52:11Zen
dc.date.adate1998-08-18en
dc.date.available2014-03-14T20:52:11Zen
dc.date.issued1998-07-29en
dc.date.rdate1998-08-18en
dc.date.sdate1998-07-29en
dc.description.abstractThis thesis presents the design and development of two switching amplifiers used to drive the so-called smart material actuators. Different from conventional circuits, a smart material actuator is ordinarily a highly capacitive load. Its capacitance is non-linear and its strain is hysteretic with respect to its electrical control signal. This actuator's reactive load property usually causes a large portion of reactive power circulating between the power amplifier and the driven actuator, thus reduces the circuit efficiency in a linear power amplifier scenario. In this thesis, a switching amplifier design based on the PWM technique is proposed to develop a highly efficient power amplifier, and peak current mode control is proposed to reduce the actuator's hysteretic behavior. Since the low frequency current loop gain tends to be low due to the circuit's capacitive load, average current mode control is further proposed to boost the low frequency current loop gain and improve the amplifier's low frequency performance. Both of the circuits have been verified by prototype design and their experimental measurement results are given.en
dc.description.degreeMaster of Scienceen
dc.identifier.otheretd-71898-95410en
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-71898-95410/en
dc.identifier.urihttp://hdl.handle.net/10919/36914en
dc.publisherVirginia Techen
dc.relation.hasparttnew315.PDFen
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subjectCurrent Mode Controlen
dc.subjectElectrostrictive Actuatoren
dc.subjectPiezoelectric Actuatoren
dc.subjectSmart Materialen
dc.subjectSwitching Amplifieren
dc.titleDesign and Development of High-Frequency Switching Amplifiers Used for Smart Material Actuators With Current Mode Controlen
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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