Hello
Dear researchers
In recent years self-balanced switched capacitor boost Multilevel inverters become a more trending research area. In which the capacitor is connected across the DC source to charge in a short period. But in the practical application how far this is feasible without the current limiting inductor.
1) Maybe in most cases, researchers are assuming the initial capacitor voltage is charged at its rated position. otherwise, it would draw a very high surge current from the input source in starting. In real-time there will be a voltage deterioration when it is not in operation. so if it is switched it will damage the IGBT?
2) I have observed in the MATLAB/ simulation. The switch resistance is considered as 1m.ohms(Ron). Even in normal conditions also the capacitor draws impulses current is nearly 100 times of rated load current. but that impulse is not observed in DSO(oscilloscope) while measuring the capacitor voltage in real-time experimentation may be due to IGBT resistance(it is approximately 14m.ohms).
4) what is the impact of this impulse current on the switch (IGBT) and input DC source during starting and normal conditions? how far this is a problem for the SCMLI.
Thank you for your valuable comments
hi,
A multilevel inverter is a power electronic device that is used for high voltage and high power application because of its characteristics of generating a sinusoidal voltage based on several DC voltage levels.
A switched capacitor (SC) is an electronic circuit element implementing a filter. It works by moving charges into and out of capacitors when switches are opened and closed. Usually, non-overlapping signals are used to control the switches, so that not all switches are closed simultaneously.
for more info:
https://www.mdpi.com/2079-9292/9/10/1703/pdf
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