Pre-Switch, supplier of soft switching technology, introduced Pre-Flex technology. The embedded AI (Artificial Intelligence) controller IC (Integrated Circuit) eliminates transistor switching losses in hard-switched architectures for virtually any solar power converter topology. Pre-Flex reduces cost, size and weight, while increasing efficiency and reliability of solar power converters.
Pre-Flex technology learns and adapts in-system, on a cycle-by-cycle basis to reliably force resonant soft-switch across changing loads, input voltages, temperatures and manufacturing tolerances. The technology has proven efficiencies greater than those of five-level topologies at a fraction of the cost and complexity. Pre-Flex also significantly lowers EMI (Electromagnetic interference) and dramatically decreases dV/dt for any switch type. Pre-Flex enables Silicon carbide-like performance for low-cost IGBTs and allows SiC- and GaN-based topologies to switch up to 20x faster than they do today. Built into the architecture are innovative cycle-by-cycle safety features and communications that were never possible before. Pre-Flex has switched 900V Wolfspeed SiC MOSFETs up to 1MHz, and 650V Infineon IGBTs at over 100 kHz with unprecedented efficiencies. The technology presently scales from 1 kW to above gigawatts.
“We have removed the biggest barrier to advancing the power conversion industry,” said Bruce Renouard, chief executive officer of Pre-Switch. “Our technology enables simple, reliable, and cost effective forced resonant soft-switching on any topology.”
Pre-Switch is working with development partners interested in leading their respective industries by designing their next-generation power converters with Pre-Flex technology.
“By significantly reducing IGBT switching losses without increasing dV/dt, Pre-Switch is creating a possibility to redefine our VFD motor drives to be smaller and more efficient without being harmful to motor insulation and bearings.” said Adalberto Jose Rossa, Drives R&D manager of WEG Drives & Controls. “We are investigating this technology, and initial test results at double-pulse and at short-circuit conditions have inspired us to test a complete drive with Pre-Switch technology. We look forward to analyzing reliability data of the system under real motor load conditions.”
“The higher switching frequencies enabled by Pre-Switch are able to provide a lower motor current ripple,” said Carlos Afonso Hümmelgen, Drives R&D coordinator from WEG Drives & Controls. “Lower motor current ripple yields reduced motor harmonic losses and increased motor and system efficiency.”
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