Fig. 1. Circuit diagram of three phase two level VSI
Fig. 2. Space vector diagram of three phase two level VSI
Fig. 3. Circuit diagram of three phase three level neutralpoint clamped VSI
Fig. 4. (a) Space vector diagram of three phase three levelVSI (b) equivalent two level space vector
Fig. 5. Timing diagram for signal generation
Fig. 6. Simulation Results for Two level VSI (a) Polevoltage waveform (b) Line voltage waveform (c)Current waveform
Fig. 7. Experimental Results for Two level VSI (a) Polevoltage waveform (b)Line voltage waveform (c)Current waveform
Fig. 8 Simulation Results for Three level VSI (a) Polevoltage waveform (b) Line voltage waveform (c)Current waveform
Fig. 9. Experimental results for Three level VSI (a) Polevoltage waveform (b) Line voltage waveform (c)Current waveform
Fig. 10. (a) & (b) Performance evaluation of clamping andadvanced bus clamping strategies in two levelinverter, (c) & (d) Performance evaluation ofclamping and advanced bus clamping strategies inthree level inverter
Table 1. Switching table for three phase two level VSI
Table 2. Switching sequence for three phase two level VSI
Table 3. Switching table for three phase three level VSI
Table 4. Switching Sequences for various triangles in sector I in three level SVPWM
Table 5. Switching sequences for three phase three level VSI
Table 6. Performance evaluation in two and three level inverter at modulation index=0.85 Pulse number = 15
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