Multilevel inverters are widely used for high power
and high voltage applications. The performance of multilevel
inverters are superior to conventional two level inverters in terms
of reduced total harmonic distortion, higher dc link voltages,
lower electromagnetic interference and increased quality in the
output voltage waveform. This paper presents a single phase
hybrid eleven level multilevel inverter topology with reduced
switch count to compensate the above mentioned disadvantages.
This paper also presents various high switching frequency based
multi carrier pulse width modulation strategies such as Phase
Disposition PWM Strategy (PDPWM), Phase Opposition and
Disposition PWM Strategy (PODPWM), Alternate Phase
opposition Disposition PWM (APODPWM), Carrier Overlapping
PWM (COPWM), Variable frequency carrier PWM (VFPWM),
Third Harmonic Injection PWM (TFIPWM) applied to the
proposed eleven level multilevel inverter and is analyzed for RL
load. FFT analysis is carried out and total harmonic distortion,
fundamental output voltage are calculated. Simulation is carried
out in MATLAB/SMULINK.