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Pre-Switch Publishes Highest Efficiency Figures For 200kW Inverter


Inc., a Silicon Valley start-up that has developed the world's-first AI-based
DC/AC, AC/DC soft-switching controller, has published performance data that
shows that its 200kW (space vector modulated) CleanWave200 evaluation inverter
exceeds 99.3% at 100kHz using only three discrete, low cost 35 mΩ SiC MOSFETs
per switch location. This is expected to revolutionize EV and renewable
energy designs.

Comments Bruce Renouard, Pre-Switch
CEO: “We are shipping the CleanWave200 evaluation systems to initial customers
around the world, and the efficiency data we are making public today more than
justifies our design goals. Customers could use the Pre-Switch technology with
even better MOSFETs and expect to get incremental performance gains, but there
is no other approach that even comes close to 99.3% efficiency at 100kHz with
such few, low cost SIC MOSFETs.”

The Pre-Switch AI enables users to
migrate from lossy, expensive hard-switching implementations to high
efficiency, soft-switching designs with a 10X higher switching frequency which
produces an almost pure sine wave output. The
Pre-Switch controller analyzes multiple inputs on a
cycle-by-cycle basis, making adjustments in real time to small, forced-resonant
transistors enabling perfect soft-switching in harsh changing environments.
Variations in system temperature, device degradation, changing input voltages
and abrupt current swings are all accounted for and
optimized within the Pre-Switch AI algorithm.

The published data plots system
efficiency for 50-100 kHz switching speeds, input voltages, power output and
current output, enabling system designers to compare the Pre-Switch results to
their own requirements. Adds Renouard: “Switching losses using our Pre-Switch
technology are effectively zero. If we put that into perspective, an EV with
Pre-Switch technology improves inverter efficiencies, producing a pure sine
wave output that dramatically improves motor efficiency at low torques where
people drive. This will result in an increase its range by up to 12%.”

The Cleanwave200 evaluation system,
reference design and design files can be ordered from Pre-Switch.

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