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A five-/nine-level twelve-switch inverter is described for three-phase high-speed electric machines having a low per-unit leakage reactance. By reducing the voltage blocking requirement of the semiconductors, the neutral-point-clamped (NPC) variant of the coupled inductor (CI) inverter topology (NPC-CI) is more suited to high dc bus voltages than the six-switch alternative (six-switch CI). Operational...
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