In this paper, hybrid modulation methods suitable for H-bridge MLI are discussed. The results of experimental work using dSPACE system only are presented for three phase five level cascaded type inverter. Different hybrid carrier PWM (Pulse Width Modulation) strategies using sinusoidal reference, third harmonic injection reference, 60 degree reference and stepped wave reference for the chosen i...

Space Vector Pulse Width Modulation is popular for variable frequency drives. The method has several advantages over carried based PWM and is computation intensive. The implementation of SVPWM for multilevel inverter requires special attention and at the same time consumes considerable resources. Due to faster processing power and reduced over all computational burden, FPGAs are being investiga...

1,2 Electrical and Electronics Engineering, Sree Buddha College Of Engineering Abstract—This paper highlights the performance of a five level inverter fed ac drive system. The presence of harmonics in the output voltage and current waveforms of traditional voltage source inverter (VSI) causes significant amount of energy loss. Multilevel inverters can reduce this harmonic content in the output ...

Absrracr-Various circuit topologies and control techniques have been proposed on inverters for AC power supply applications but without much emphasis on very high power systems. Incorporation of a non conventional inverter topology known as multilevel inverter with an optimal PWM based control scheme is proposed in this work for high voltage applications when the switching frequency of the inve...

This paper presents a new transformer based multilevel inverter, with a novel pulse width modulation scheme to achieve seven-level inverter output voltage. The proposed inverter switching pattern consists of three fundamental frequency sinusoidal reference signals with an offset value, and one high frequency triangular carrier signal. This switching scheme has been implemented using an 8-bit Xi...

This paper presents the novel multilevel inverter fed control structure for induction motor based Direct Torque Control (DTC) strategy using a seven-level Multi Point Clamped (MPC) Voltage Source Inverter (VSI) is presented. It is shown that the multilevel topology presents enough degrees of freedom to control both electromagnetic torque and stator flux with very low ripple and high dynamics on...

Minimum Total Harmonic Distortion (THD) is one of the most important requirements from multilevel inverter concerning good Power Quality. This paper presents the optimization of THD in 13 level Cascaded Multilevel Inverter with unequal dc source using Genetic Algorithm (GA). THD minimization is taken as an optimization problem derived from Selective Harmonic Elimination Pulse width Modulation (...

A multilevel inverter is a power electronic device made to synthesize a desired AC voltage from several levels of DC voltages. Some industrial drives require medium voltage and megawatt power level. For a medium voltage grid, it is troublesome to connect only one power semiconductor switch directly. A multilevel power converter structure has been introduced as an alternative in high power and m...

A hybrid structured asymmetric switching capacitor multilevel inverter (ASC-MLI) is suggested in this work. The notion behind presenting topology to reduce the device count and DC sources as compared with conventional MLI. step by operating mode of single phase ASC-MLI presented doing slight modifications same configuration used three utility application electric drive. proposed configurations ...