| 摘要 |
PURPOSE: A method for controlling the three phase z source inverter of a voltage type is provided to prevent the range shortfall or the excess of a following modulation index and optimize a modulation index through the comparison of a command modulation index and a real modulation index. CONSTITUTION: A voltage gain detection unit(100) detects a voltage gain using a relational expression between an input voltage and a capacitor. A modulation index converting unit(200) determines a modulation index based on a voltage gain relational expression. A modulation index following unit(300) determines a following modulation index. A switch unit(500) controls the switch unit of the inverter using the following modulation index.
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