dc-ac inverter Multilevel Flying Capacitor configuration (sine wave) MATLAB

Описание: This video shows the theory and Matlab simulation model of Multilevel inverter Flying Capacitor configuration in a simple way for beginners in MATLAB.
Who needs to watch this video?
1. Professionals.
2. Engineering students.
3. Diploma students.
4. PhD students.
5. M.Tech students.

FLYING-CAPACITOR CONFIGURATION
• FC ( Flying capacitor) converters present higher degrees of freedom (redundant states) to synthesize a specific output voltage and employ a lesser number of semiconductor power devices than the neutral point clamped (NPC) topology.
• The main challenge of the FC configuration is to keep the FC voltage under the desired level, avoiding distortion at the ac part of the converter.
• A simple pulse width modulation (PWM) approach is employed to generate a three-level output voltage. It is demonstrated that the PWM approach affects the voltage ripple of the FC voltage.
• There are different strategies to regulate the capacitor voltage, which can be sorted into two main types: natural-balancing and active schemes.
PWM GENERATION CIRCUIT FOR SWITCHES
• Figure (a) and (b) shows the states of the four switches PWM implementation known as level-shift, in which the states of the four power switches are determined by a comparison among two high-frequency triangular waveforms (v t2 and v t2) and a sinusoidal waveform (v sine).
• Figure (c) and (d) shows that the switches q1 and q1 bar are in operation (on and off during the positive half cycle of v sine) the switch q2 is on and consequently the switch q2 bar is off for the whole half period.
• On the other hand, on the negative half cycle of v sine, when the switches q2 and q2 bar are in operation (alternating on and off) the switch q1 is off and consequently the switch q1 bar is on.
The parameters employed in these simulation tests were: Vdc = 200 Volt, R = 5 ohm, and L = 5 milli Henry, and switching frequency equal to 500 Hz.