Fault-Tolerant Control Strategy for Neutral-Point-Clamped Three-Level Inverter

Table 3

The sequence and action time of voltage vectors in each region.

Region	Switching sequence	Action time
I-1	POO-PPO-PPP-PPP-PPO-POO
I-2	POO-PPO-PPP-PPP-PPO-POO
I-3	PON-POO-PPO-PPO-POO-PON
I-4	PON-POO-PPO-PPO-POO-PON
I-5	PNN-PON-POO-POO-PON-PNN
I-6	PON-PPN-PPO-PPO-PPN-PON
IV-1	NNN-NNO-NOO-NOO-NN0-NNN
IV-2	NNN-NNO-NOO-NOO-NN0-NNN
IV-3	NNO-NOO-NOP-NOP-NOO-NNO
IV-4	NNO-NOO-NOP-NOP-NOO-NNO
IV-5	NOO-NOP-NPP-NPP-NOP-NOO
IV-6	NNO-NNP-NOP-NOP-NNP-NNO