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In three-phase induction motor drives, addition of certain zero-sequence signal which divides the null vector time equally between the two zero states is known to improve the harmonic performance over sinusoidal modulation. Similarly, in split-phase induction motor (SPIM) drives also, addition of such a zero-sequence signal to each set of three-phase sinusoidal modulating waves leads to reduction...
Space vector modulated voltage-source inverters require an overmodulation algorithm for continuous control of line-side voltage during overmodulation and for a smooth transition from PWM to six-step mode. Overmodulation increases the dc bus utilisation of a voltage source inverter, but requires significantly higher computational effort than linear modulation. This paper proposes a novel single-zone...
Space vector based PWM strategies for three-level inverters have a broader choice of switching sequences to generate the required reference vector than triangle comparison based PWM techniques. However, space vector based PWM involves numerous steps which are computationally intensive. A simplified algorithm is proposed here, which is shown to reduce the computation time significantly. The developed...
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