Bruce Renouard, CEO of Pre-Switch, comments: “Over a year ago, we announced peak efficiency figures exceeding 99%. Since then, we have refined our AI algorithm to improve low-load performance. The results are astounding. An efficiency of 98.5% at 5% load far surpasses what can be achieved with any other approach today, demonstrating that soft switching and the Pre-Switch™ architecture will lead the electrification revolution in electric mobility.”
Pre-Switch eliminates switching losses and enables switching frequencies 10 times higher, resulting in a massive increase in efficiency. In electric vehicles, this translates to greater efficiency, range, and motor reliability. The Pre-Switch architecture addresses the challenges that have thus far prevented the industry from transitioning to soft switching for EV inverters. The exceptional efficiency at low loads and the high-frequency, low-distortion signal waveform delivered to the motor significantly improve WLTP (Wide Range Test Procedure) range performance. The topology is a variation of the Auxiliary Resonant Switched Poles (ARCP) soft-switching converter design. However, Pre-Switch employs sophisticated embedded artificial intelligence to dynamically solve the complex timing calculations of the switching system to ensure precise soft switching under changing input voltage, output load, device tolerances, and temperature variations. Adaptations are made cycle by cycle to minimize losses and maximize efficiency.
Renouard adds: “We believe our technology is the paradigm shift that EV OEMs have been seeking, enabling essential differentiation in efficiency and EV leadership. These results demonstrate the effectiveness of our technology and definitively validate our previous claims.”
Pre-Switch is already working with leading EV manufacturers and other e-mobility companies. Evaluation systems are available for other stakeholders.

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