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This article proposes a new method to eliminate undesired harmonics in the output of a single-phase square-wave inverter. The method has some important advantages that outweigh square-wave inverters and similar types. Besides being easy to control and construct, it has a high efficiency due to its low-frequency switching pattern. It would also be very useful in high-power demands, and capable of driving huge motors used in heavy industries. In this paper, the Matlab/Simulink simulation results of the whole system by the proposed method are presented and compared with experimental results of a prototype to verify its advantages over existing methods. [ABSTRACT FROM AUTHOR]