What is the total harmonic distortion (THD) analysis?
What is the total harmonic distortion (THD) analysis Cascaded MLI typically use IGBT switches which have low block voltage and high switching frequency for tremendous input current and output voltage waveform. Output voltage has smooth step,so the output filter is not needed.The harmonic spectra depend on the switching frequency and the control techniques.Carrier based PWM is highly conventional technique is based on the comparison of a sinusoidal reference with carrier signals which are usually selected triangular and modified in phase or vertical position to reduce the output voltage harmonic content.The harmonic in induction motor sometimes exhibit to run stably at speed as low as 1/7 of thier synchronous speed. technicaleduarkujur.blogspot.com