Research Article
An Enhanced Space Vector PWM Strategies for Three Phase Asymmetric Multilevel Inverter
Table 5
Selection of 2L hexagons from 4L SVD and mapping of Vref2 from Vref4.
| | Hexagon No | Magnitude of Vref4 | Range of θ | V2αi | V2βi |
| | IH | ≤E | — | — | — | | >E | 340° to 20° | V4α − 2E | V4β | | 20° to 40° | V4α − 1.73E cos (π/6) | V4β − 1.73E sin (π/6) | | 40° to 80° | V4α − 2E cos (2π/6) | V4β − 2E sin (2π/6) | | 80° to 100° | V4α | V4β − 1.73 E | | 100° to 140° | V4α − 2E cos (4π/6) | V4β − 2E sin (4π/6) | | 140° to 160° | V4α − 1.73Ecos (5π/6) | V4β − 1.73Esin (5π/6) | | 160° to 200° | V4α + 2E | V4β | | 200° to 220° | V4α − 1.73Ecos (7π/6) | V4β − 1.73E sin (7π/6) | | 220° to 260° | V4α − 2Ecos (8π/6) | V4β − 2E sin (8π/6) | | 260° to 280° | V4α − 1.73Ecos (9π/6) | V4β − 1.73Esin (9π/6) | | 280° to 320° | V4α − 2Ecos (10π/6) | V4β − 2E sin (10π/6) | | 320° to 340° | V4α − 1.73Ecos (11π/6) | V4β − 1.73E sin (11π/6) |
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