Mathematical Problems in Engineering

Research Article

An Improved Phase Disposition SPWM Strategy for Cascaded Multilevel Inverter

Figure 5

Carrier signal sets of the improved PD control method.
731574.fig.005a
(a) Ca.1
731574.fig.005b
(b) Ca.2
731574.fig.005c
(c) Ca.3
731574.fig.005d
(d) Ca.4