Faculty Publications
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Item A bus-clamping pulse width modulation method for a dodecagonal space vector generation scheme for 3-phase open-end winding induction motor drives(Institute of Electrical and Electronics Engineers Inc., 2017) Arumalla, R.T.; Figarado, S.Obtaining better harmonic profile at relatively lower switching frequencies is one of the key tasks in the present day power electronics world. Several pulse width modulation (PWM) techniques have been developed earlier in time, to reduce the harmonic content from the output of the inverter. Dodecagonal space vector generation scheme is one of them, which eliminates the most dominant lower order harmonics for the entire modulation range. In this paper, bus-clamping PWM technique is developed for a dodecagonal space vector structure, which is capable of reducing the switching frequency in the linear modulation range compared to conventional dodecagonal space vector technique. In order to compare the performance of the PWM schemes in terms of harmonic content, analytical expressions are derived based on the notion of stator flux ripple in the space vector domain. The results are verified by simulating and comparing the voltage harmonic distortion of the scheme with conventional dodecagonal scheme in terms of voltage weighted total harmonic distortion (VWTHD) and current total harmonic distortion (ITHD). © 2017 IEEE.Item Selective Lower Order Harmonic Elimination in DC-AC Converter Using Space Vector Approach(Institute of Electrical and Electronics Engineers Inc., 2021) Arumalla, R.T.; Figarado, S.; Panuganti, K.; Nagendrappa, N.A novel space vector-based approach is introduced in this brief to selectively eliminate the lower order harmonics from the DC-AC converter output waveform by making use of double switching clamping sequences. This technique uses a volt-second balance for control of fundamental voltage while using the dwell time rearrangement of the active vector in a sub-cycle to obtain the elimination of fifth or seventh harmonics. Further, the closed-form expression of the dwell time-division coefficient (DTDC) for the active vector dwell time division rearrangement is expressed. The proposed PWM technique is compared with other space vector-based PWM techniques in terms of voltage weighted total harmonic distortion, switching power loss, and lower order harmonic magnitudes. Further, the experimental results are presented to show the effectiveness of the proposed PWM techniques in terms of harmonic elimination. © 2004-2012 IEEE.