Xponential Commercial Part 2 | Show report generator’s alternating current (up to 70 V AC and 40 A) into direct current for charging a battery. But, rather than using passive rectification with a six-diode bridge (which can incur significant losses), IntelliGen runs using active rectification and can set the voltage coming off the DC rail to match the battery requirements independent of engine speed. Downstream of the rectifier, a regulator is installed in IntelliGen for outputting regulated 28 V DC power to the rest of the UAV (this output can be configured for an 8S LiFePO4 pack or a 6S LiPo pack). Installed with that are additional 6 V and 12 V regulators, ensuring diversity of power supplies for differently sized DC buses across voltage architectures. “Perhaps most uniquely, we’ve designed a variable, real-time, currentlimit control function into it, which means the amount of power the regulator can supply can be chosen through the software at any given time, or set to limits based on certain engine speeds or temperatures,” Vaglienti added. “That also means we can configure the system to avoid overloading the engine if the electrical load becomes too big – not something that is possible in a passive rectification system. If your payload suddenly pulls 1000 W, but your engine is overheating, we can trigger a backup battery to take the load while the engine slows down and then pay the battery back later once the engine is in a safe thermal state to recharge it.” From its 28 V output, IntelliGen nominally provides up to 15 A, though with adequate cooling this can increase to 30 A. The system weighs 300 g, measures 126 mm x 78 mm x 28 mm, and communicates over either CAN or a serial interface. One Stop Systems (OSS) exhibited the PCIe Gen4 version of its 3U short-depth server, a rack- or flangemountable chassis compatible with flexible power inputs ranging from 48 V DC up to 240 V AC, the past versions of which are currently deployed in several autonomous systems operating in rugged environments. “This version is our liquid-cooled 3U SDS, supporting four NVIDIA A100 GPUs,” said Jaan Mannik from OSS. “It still has the forced-air system of the previous generation to cool PCBAs and other devices, but today’s CPUs generate too much heat. Some new CPUs have a 250 W TDP [thermal design power] and GPUs are around 350 W of power.” To compensate, OSS has engineered a fully self-contained liquid-cooling system into the server (bypassing the need for any external hoses or fittings for coolant), the first unit of which is deployed in a submarine as of writing. The coolant itself is a proprietary mix of ethylene glycol and some other components from OSS’s partner. It sits in a reservoir in the chassis, runs into a radiator, and out into a switch that proliferates the mil-spec hoses outwards to the heatsinks on the GPU and CPU. “The design is ideal for any integrator or operator who has to deal with extended ambient operating temperatures, or who just doesn’t like generating a lot of noise,” Mannik added. “It is also fully configurable for customers to implement PCIe 4.0 or 5.0. They can also use Intel CPUs or AMD CPUs, and select their endpoint devices.” The company also showcased its Donati and Cernis solutions, its first embedded compute platforms. The former is a 4.8 kg system with 64 Tensor cores and 275 TOPS of AI processing performance, while the latter is an 8.66 kg system with 32 Tensor cores and 40 TOPS processing. “These were highly purpose-built for a specific army application for 360o situational awareness in an armoured 107 Uncrewed Systems Technology | August/September 2024 Power4Flight’s IntelliGen controller One Stop Systems’ PCIe Gen4 version of its 3U short-depth server
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