Table 1.

Generalized switching states pattern for HCHB inverters.

${\mathit{S}}_{\mathit{x}1}$	${\mathit{S}}_{\mathit{x}2}$	${\mathit{S}}_{\mathit{x}3}$	${\mathit{S}}_{\mathit{x}4}$	${\mathit{v}}_{\mathit{x}\mathit{N}}$	${\mathit{i}}_{\mathit{C}1,\mathit{x}}$	${\mathit{i}}_{\mathit{C}2,\mathit{x}}$	${\mathit{i}}_{\mathit{f}\mathit{x}}$
1	1	0	1	$V_{C1}+V_{C2}+V_{fx}$	$\uparrow$	$\uparrow$	$\uparrow$
1	1	1	1	$V_{C1}+V_{C2}$	$\uparrow$	$\uparrow$	$-$
1	1	0	0	$V_{C1}+V_{C2}$	$\uparrow$	$\uparrow$	$-$
1	1	1	0	$V_{C1}+V_{C2}-V_{fx}$	$\uparrow$	$\uparrow$	$\downarrow$
0	1	0	1	$V_{C2}+V_{fx}$	$-$	$\uparrow$	$\uparrow$
0	1	1	1	$V_{C2}$	$-$	$\uparrow$	$-$
0	1	0	0	$V_{C2}$	$-$	$\uparrow$	$-$
0	1	1	0	$V_{C2}-V_{fx}$	$-$	$\uparrow$	$\downarrow$
0	0	0	1	$V_{fx}$	$-$	$-$	$\uparrow$
0	0	1	1	0	$-$	$-$	$-$
0	0	0	0	0	$-$	$-$	$-$
0	0	1	0	$-V_{fx}$	$-$	$-$	$\downarrow$

$-$: No current flows through the corresponding capacitor $\left(i_x>0\right)$. $\uparrow$: Current discharges the corresponding capacitor $\left(i_x>0\right)$. $\downarrow$: Current charges the corresponding capacitor $\left(i_x>0\right)$.