![]() We have taken advantage of both SiC and GaN devices to do that.” “Faster switching can lead to smaller magnetic designs. “Silicon carbide offers better characteristics in terms of voltage and current capability, and it all depends on how fast you want to switch and how low our R DS(on) is when selecting devices,” he added. “But we are also looking at GaN FETs in possible implementations.” “We use silicon carbide components and high magnetic permeability materials to increase efficiency,” said Germinario. ![]() The key is to achieve maximum efficiency by minimizing the thermal load in the first place. This focus is applied to all aspects of having a flight-worthy design.” And that’s where we need to focus to make sure we meet the environmental requirements. “Humidity is related to protecting the electronics with a conformal coating. “Performance in terms of temperature, humidity, and shock vibration are important elements to consider,” he added. “1-STEP also delivers numerous other advantages such as higher reliability, less harmonic distortion, and the ability to step up or step down output voltage, to name a few,” said Germinario. A 1-STEP converter is a circuit solution that achieves active power-factor correction, output voltage regulation, and electrical isolation in a single conversion step. The aim of the AC-DC 1-STEP, as Germinario said, is to minimize these tradeoffs.ġ-STEP converts AC input power to DC output power in a single, simplified conversion step to reduce weight, cost, and risk in a wide range of commercial and military applications. In turn, designers are involved in tradeoffs in terms of size, weight, power, and cost. The steps involved in converting a three-phase AC power supply add their own complexity and components, contributing to the loss of efficiency and adding mass. In an interview with Power Electronics News, Michael Germinario, senior technical director at Marotta, highlighted that the PS11200 has passed all qualification tests necessary to ensure the reliability and performance of the power converter within harsh environments commonly presented by military/heavy transport aircraft such as C-130 Hercules cargo planes and CH-47 Chinook transport helicopters, as well as unmanned aerial vehicles. ![]() The PS11200 is rated at 11,200 W (28 VDC 400 A) with a three-phase input power of 115 VAC, 50 Hz to 800 Hz. It is designed to replace legacy 400-A solutions that typically produce unregulated or loosely regulated power in a larger footprint. This switching power supply delivers 11,200 W of fully isolated output power with 91% efficiency at full load. Marotta Controls announced the availability and final qualification of the PS11200, the fourth variant of the 1-STEP product line.
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