Performance Evaluation of Multiple Carrier Scalar PWM Algorithms for Cascaded Multilevel Inverter Fed Induction Motor Drive
Nayeemuddin. M1, T. Bramhanada Reddy2, M. Vijaya Kumar3
1Nayeemuddin. M, Associate Professor, Department of Electrical Engineering, G. Pulla Reddy Engineering College Autonomous, Kurnool (Andhra Pradesh), India.
2T. Bramhanada Reddy, Professor, Department of Electrical Engineering, G. Pulla Reddy Engineering College Autonomous, Kurnool (Andhra Pradesh), India.
3M.Vijaya Kumar, Professor, Department of Electrical Engineering, JNTUA, Ananthapuramu (Andhra Pradesh), India.
Manuscript received on 03 June 2019 | Revised Manuscript received on 28 June 2019 | Manuscript Published on 04 July 2019 | PP: 160-165 | Volume-8 Issue-1S4 June 2019 | Retrieval Number: A10320681S419/2019©BEIESP
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© The Authors. Blue Eyes Intelligence Engineering and Sciences Publication (BEIESP). This is an open access article under the CC-BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)
Abstract: This paper explores and compares about different multiple carrier PWM techniques for three-level three-phase voltage source Inverter. Several algorithms for CMV decrease have been proposed in the literature. This paper investigate four various control strategies namely Common Carrier (CC), Inverted Carrier (IC), Phase Shifted (PS) and Inverted Phase Shift (IPS) for cascaded multilevel inverter fed induction motor drive. In Sinusoidal PWM, variable AC output voltage of inverter is produced by comparing a sinusoidal reference signal with triangular signal, where as Conventional SVPWM utilizes complex voltage vector for PWM control. It is seen that SVPWM method makes it conceivable to the fundamental output voltage to increase 15.5% in comparison with SPWM. More over traditional SVPWM method requires angle and sector information for calculating sequences for the gate terminal of the inverter, a simplified SVPWM algorithm is also described, which does not require angle and sector calculation. In this algorithm with the proposed technique it easy to program for pulse patterns generation of various multi carrier based PWM algorithms. To verify and validate the proposed research work laboratory experimental tests have been conducted using dSPACE controller, which proved the reduction in common-mode voltage with fewer harmonics for a motor drive.
Keywords: Cascaded Inverters, Multicarrier PWM, SVPWM, Common Mode Voltage (CMV), Total Harmonics Distortion.
Scope of the Article: Web Algorithms