TY - JOUR U1 - Zeitschriftenartikel, nicht wissenschaftlich A1 - Zahoransky, Richard A. A1 - Geimer, Marcus A1 - Dengler, Peter T1 - Variable Speed Generators with High Fuel Savings JF - Beiträge aus Forschung & Technik N2 - Auxiliary power units (APUs) are used in mobile applications to supply electrical power in the range of 3 to 10 kW. The state of the art generators are driven by a diesel engine at constant speed. They have a low efficiency (high fuel consumption) as they operate mostly in partial load conditions. A higher efficiency for partial loads is feasible by adjusting the speed of the diesel engine to its optimum efficiency. A frequency converter provides a constant electric frequency at variable speed of the generator. The resulting higher investments for such a variable speed generator (VSG) need a proof of economics, which is demonstrated by this investigation. KW - Fuel KW - Hilfstriebwerk KW - Generator KW - Auxiliary Power Units KW - fuel consumption KW - fuel savings KW - diesel engine Y1 - 2012 U6 - https://nbn-resolving.org/urn:nbn:de:bsz:ofb1-opus-1650 UN - https://nbn-resolving.org/urn:nbn:de:bsz:ofb1-opus-1650 SN - 1866-9352 SS - 1866-9352 VL - 2012 SP - 72 EP - 76 ER -