Barton, Thomas H.Rajakaruna, Rajakaruna Mohotti Appuhamilage Sumedha2005-07-212005-07-2119890315543132http://hdl.handle.net/1880/21734Bibliography: p. 156-162.As a help in selecting a PWM technique for a given application, a comparative study of the performance of a three-phase induction motor is made for current hysteresis modulation and conventional sinusoidal voltage modulation. Frequency domain analysis as normally applied for sinusoidal voltage modulation using the Fourier series representation of the waveforms is inapplicable for the analysis of current hysteresis modulation, because the waveforms are aperiodic. Since the switching instants of the current hysteresis modulated inverter can only be determined from a time domain analysis, a time domain technique using the system eigenvalues is applied for the analysis of both PWM strategies. The comparisons made for average values of torque and power loss, waveforms and spectra of line currents and e.m. torque for various operating conditions lead to the conclusion that highly variable inverter switching frequency of current hysteresis modulation brings many adverse results and thereby make it inferior to the sinusoidal voltage modulation.xvii, 162 leaves ; 30 cm.engUniversity of Calgary graduate students retain copyright ownership and moral rights for their thesis. You may use this material in any way that is permitted by the Copyright Act or through licensing that has been assigned to the document. For uses that are not allowable under copyright legislation or licensing, you are required to seek permission.TK 7868 P8 R34Pulse-duration modulationmaster thesis10.11575/PRISM/21225TK 7868 P8 R34