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首页> 外文期刊>International Journal of Engineering Research and Applications >Design and Simulation of Low Pass Filter for Single phase full bridge Inverter employing SPWM Unipolar voltage switching
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Design and Simulation of Low Pass Filter for Single phase full bridge Inverter employing SPWM Unipolar voltage switching

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Sinusoidal pulse width modulation SPWM technique is widely preferred to other modulation techniques as the Inverter output frequency obtained is equal to the required fundamental frequency. SPWM with unipolar voltage switching is used as it results in cancellation of harmonic component at the switching frequencyin the output voltage, also the sidebands of the switching frequency harmonics disappear and in addition to this, other dominant harmonic at twice the switching frequency gets eliminated. Hence, due to these advantages unipolar voltage switching with SPWMis used for Inverter switching. In this paper, an in-depth analysis of unipolar voltage switching technique with SPWM as applied to a single-phase full bridge Inverter is described and designing of an efficient, active low pass filter LPF is discussed for an particular cut-off frequency,?? and damping factor zeta, ? and the filter is placed at the output side of a single-phase full bridge Inverter and therefore eliminating the harmonic component from the Inverter output voltage resulting in a pure sinusoidal ac voltage waveform.

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