Design and Implementation of a Novel Multilevel DC–AC Inverter

Abstract— A novel multilevel dc–ac inverter is pro-posed. The proposed multilevel inverter generates s even-level ac output voltage with the appropriate gate signals’ design. Also, the low-pass filter is used to reduce the total harmonic distortion of the sinusoidal output voltage. The switching losses and the voltage stress of power devices can be reduced in the proposed multi-level inverter. The operating principles of the proposed inverter and the voltage balancing method of input capacitors are d is-cussed. Finally, a laboratory prototype multilevel inverter with 400-V input voltage and output 220 Vrms /2 kW is implemented. The multilevel inverter is controlled with sinusoidal pulse-width modulation (SPWM) b y T MS320LF2407 digital signal processor (DSP). Experimental results s how that the maximum efficiency is 96.9% and the full load efficiency i s 94.6%. Because of the advancement of semiconductor, the specification of power device and power conversion technique is promoted. One of the power converters which can trans-form dc–ac is called inverter.< final year projects >