Silicon Valley start-up Pre-Switch is claiming >99.3% efficiency at 100kHz and 100kW from its 200kW space vector modulated automotive traction inverter design, which uses 18x 35mΩ SiC mosfets in its three-phase bridge. The company’s topology, ‘called auxiliary resonant commutated pole’, is soft-switched to save switching losses, using a separate bank of relatively-small carefully-timed silicon IGBT series ...

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