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6F3A4768
5.1.3 Main Circuit Operation for Three-level Inverter
Fig.
5.1.5 and Fig. 5.1.6 show the main circuit operation for the three-level IGBT inverter.
(1) When Q1 and Q2 are ON (positive current)
Fig. 5.1.5 Main Circuit Operation for Three-level Inverter
(2) When Q2 and Q3 are ON (positive current)
Q1
Q4
Q2
Q3
P(+900V)
N(-900V)
D5
D6
(3) When Q3 and Q4 are ON (positive current)
P(+900V)
Q1
D5
D6
Q2
Q3
Q4
N(-900V)
Q1
Q4
Q2
Q3
P(+900V)
N(-900V)
D5
D6
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