New multilevel inverter topology with reduced number of switches

The multi-level inverter system is very promising i n ac drives, when both reduced harmonic contents and high power are required. In this paper, a new topology for sym metrical and asymmetrical multilevel inverter is introduced. Bot h types have many steps with fewer power electronic switches, which results in reduction of installation area and cost and have si mplicity of control system. Firstly, we describe briefly the st ructural parts of the inverter then switching strategy and operationa l principles of the proposed inverter are explained and operational topologies are given. A new algorithm for determination of dc voltage sources' magnitudes has also been presented. Finall y, the simulation results verify the effectiveness of the both topology in multilevel inverter configuration and validate the proposed theory. Keywords—Asymmetrical multilevel Inverter, Bidirectional switch, Total Harmonic Distortion (THD)

[1]  J. Chiasson,et al.  A cascade multilevel inverter using a single DC source , 2006, Twenty-First Annual IEEE Applied Power Electronics Conference and Exposition, 2006. APEC '06..

[2]  A.S. Samosir,et al.  A new topology -Reversing Voltage (RV) - for multi level inverters , 2008, 2008 IEEE 2nd International Power and Energy Conference.

[3]  Saad Mekhilef,et al.  Design and Implementation of a Multi Level Three-Phase Inverter with Less Switches and Low Output Voltage Distortion , 2009 .

[4]  Hirofumi Akagi,et al.  A New Neutral-Point-Clamped PWM Inverter , 1981, IEEE Transactions on Industry Applications.

[5]  Saad Mekhilef,et al.  Novel Vector Control Method for Three-Stage Hybrid Cascaded Multilevel Inverter , 2011, IEEE Transactions on Industrial Electronics.

[6]  Saad Mekhilef,et al.  Modelling of three-phase uniform symmetrical sampling digital PWM for power converter , 2004, PESC 2004.

[7]  E. Babaei,et al.  A Cascade Multilevel Converter Topology With Reduced Number of Switches , 2008, IEEE Transactions on Power Electronics.

[8]  Ebrahim Babaei,et al.  Reduction of dc voltage sources and switches in asymmetrical multilevel converters using a novel topology , 2007 .

[9]  Ebrahim Babaei,et al.  New cascaded multilevel inverter topology with minimum number of switches , 2009 .

[10]  E. Babaei,et al.  A novel structure for multilevel converters , 2005, 2005 International Conference on Electrical Machines and Systems.

[11]  Saad Mekhilef,et al.  Modeling of Three-Phase Uniform Symmetrical Sampling Digital PWM for Power Converter , 2005, IEEE Transactions on Industrial Electronics.

[12]  Leon M. Tolbert,et al.  Multilevel converters as a utility interface for renewable energy systems , 2000, 2000 Power Engineering Society Summer Meeting (Cat. No.00CH37134).

[13]  Saad Mekhilef,et al.  Dual Vector Control Strategy for a Three-Stage Hybrid Cascaded Multilevel Inverter , 2010 .

[14]  Saad Mekhilef,et al.  Voltage Control of Three-Stage Hybrid Multilevel Inverter Using Vector Transformation , 2010 .

[15]  S. Camur,et al.  Design and application of a novel structure and topology for multilevel inverter , 2008, 2008 International Symposium on Power Electronics, Electrical Drives, Automation and Motion.

[16]  Man Hyung Lee,et al.  A new single-phase five-level PWM inverter employing a deadbeat control scheme , 2003 .

[17]  Fang Zheng Peng,et al.  Multilevel inverters: a survey of topologies, controls, and applications , 2002, IEEE Trans. Ind. Electron..

[18]  Leon M. Tolbert,et al.  Multilevel inverters for electric vehicle applications , 1998, Power Electronics in Transportation (Cat. No.98TH8349).

[19]  Dong-Seok Hyun,et al.  An Improved Carrier-Based SVPWM Method Using Leg Voltage Redundancies in Generalized Cascaded , 2003 .

[20]  T.A. Meynard,et al.  Multi-level conversion: high voltage choppers and voltage-source inverters , 1992, PESC '92 Record. 23rd Annual IEEE Power Electronics Specialists Conference.

[21]  Yifan Zhao,et al.  Current control of a 3-level rectifier/inverter drive system , 1994, Proceedings of 1994 IEEE Industry Applications Society Annual Meeting.

[22]  Chintan Patel,et al.  A simple five-level inverter topology for induction motor drive using conventional two-level inverters and flying capacitor technique , 2009, 2009 35th Annual Conference of IEEE Industrial Electronics.

[23]  Leon M. Tolbert,et al.  Multilevel PWM methods at low modulation indices , 2000 .

[24]  D. S. Hyun,et al.  Simple harmonic analysis method for multi-carrier PWM techniques using output phase voltage in multi-level inverter , 2005 .

[25]  Dong-Seok Hyun,et al.  An improved carrierwave-based SVPWM method using phase voltage redundancies for generalized cascaded multilevel inverter topology , 2000, APEC 2000. Fifteenth Annual IEEE Applied Power Electronics Conference and Exposition (Cat. No.00CH37058).

[26]  G.B. Gharehpetian,et al.  Comparison of OMTHD and OHSW harmonic optimization techniques in multi-level voltage-source inverter with non-equal DC sources , 2007, 2007 7th Internatonal Conference on Power Electronics.