Switched Capacitor Based High Step-Up Multilevel Inverter with Self-Balancing Ability and Low Switching Stress

Table 1

. Modes of operation and state of capacitors.

Voltage level	Conduction of switches	Conduction of diodes	State of capacitors
			C1	C2	C3	C4	C5
+Vdc	Sa3, Sb2, Sc2, Sd2, Se2, Sf2, Sa2	Sb4, Sc4, Sd4, Se4, Sf4	↑	↑	↑	↑	↑
+2Vdc	Sa3, Sb2, Sb3, Sc2, Sd2, Se2, Sf2, Sa2	Sc4, Sd4, Se4, Sf4	↓	↑	↑	↑	↑
+3Vdc	Sa3, Sb2, Sb3, Sc2, Sc3,Sd2, Se2, Sf2, Sa2	Sd4, Se4, Sf4	↓	↓	↑	↑	↑
+4Vdc	Sa3, Sb2, Sb3, Sc2, Sc3,Sd2, Sd3, Se2, Sf2, Sa2	Se4, Sf4	↓	↓	↓	↑	↑
+5Vdc	Sa3, Sb2, Sb3, Sc2, Sc3,Sd2, Sd3, Se2, Se3, Sf2, Sa2	Sf4	↓	↓	↓	↓	↑
+6Vdc	Sa3, Sb2, Sb3, Sc2, Sc3,Sd2, Sd3, Se2, Se3, Sf2, Sf3, Sa2	—	↓	↓	↓	↓	↓
−6Vdc	Sa1, Sf4, Sf1, Se4, Se1,Sd4, Sd1, Sc4, Sc1,Sb4, Sb1, Sa4	—	↓	↓	↓	↓	↓
−5Vdc	Sa1, Sf4, Se4, Se1,Sd4, Sd1, Sc4, Sc1,Sb4, Sb1, Sa4	Sf2	↓	↓	↓	↓	↑
−4Vdc	Sa1, Sf4, Se4, Sd4, Sd1, Sc4, Sc1,Sb4, Sb1, Sa4	Sf2, Se2,	↓	↓	↓	↑	↑
−3Vdc	Sa1, Sf4, Se4, Sd4, Sc4, Sc1,Sb4, Sb1, Sa4	Sf2, Se2, Sd2	↓	↓	↑	↑	↑
−2Vdc	Sa1, Sf4, Se4, Sd4, Sc4, Sb4, Sb1, Sa4	Sf2, Se2, Sd2, Sc2	↓	↑	↑	↑	↑
−Vdc	Sa1, Sf4, Se4, Sd4, Sc4, Sb4, Sa4	Sf2, Se2, Sd2, Sc2, Sb2	↑	↑	↑	↑	↑

↑ = Charging; ↓ = Discharging.