Objects and locations: airplanes, unmanned aerial vehicles, meteo-probes, atmospheric and earth-surface monitoring equipment, aerial laboratories, etc. Constructive volumes protected from external factors, however there may be slightly protected volumes as well. Factors: vibrations, impacts with acceleration up to hundreds and thousands of G’s, sometimes short-term moisture, sand, dust, low pressure. Temperature of the converter case from -60 °С to +100…+110 °С. In some cases, from -70 °С to +120…+130 °С. At such heights natural radiation occurs, a careful selection of electronic components is necessary. Requirements for power units: protection from moisture, the design should be vibration and shock-resistant, case mounting should necessarily be multi-point via threaded holes. Very important are low-profile, small size and weight, high efficiency, often required parallel operation. Cooling method – forced air or conductive via heat sink.
Objects and locations: airplanes, unmanned aerial vehicles, hot-air balloons, atmospheric and earth-surface monitoring equipment, aerial laboratories, etc. Constructive volumes protected and slightly protected from external factors. Factors: vibrations, impacts with acceleration up to hundreds and thousands of G’s, moisture, sand, dust. Decreased pressure, low-level radiation. Temperature of the converter case from -60 °С to +80…+110 °С, with rapid temperatures changes. Requirements for power units: protection from moisture via polymeric cover, construction should be vibration and shock-resistant, case mounting – should be multi-point via threaded holes, mounting via unit outputs is not allowed. Very important are low-profile, small size and weight, high efficiency. Parallel operation may be required. Cooling method – forced air or conductive via heat sink.