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SVPWM for two Legged Three Phase Multilevel Inverters ? a Simplified Approach on 16 Bit Microcontroller Platform

Shinu N Yohannan, Kiran T.S, Anish Gopinath

The paper brings out the observation that the space vector representation of four switch three phase inverter. It is used to develop a simple and generalized Space Vector Pulse Width Modulation (SVPWM) algorithm for two legged multilevel inverters. The space vectors of any n-level inverter can be generated from the vectors of 2-level inverter using simple addition operation and doesn’t use any look up tables. The simple addition operation used for the generation of space vectors of n-level inverter is also used to generate the inverter switching states of the corresponding vectors. The proposed algorithm is a generalized algorithm and can be extended to any n-level inverter configuration without any computational complexity. The validation of the algorithm through simulations in MATLAB/SIMULINK and experimental in PIC24HJ128GP310 microcontroller has been carried out for 3-level inverter configurations for which the results are also presented.

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