Axial fans

Control technologyOpen and closed loop control using ebm-papst technologyDepending on the field of application, fan speed has to be adjusted. In AC technology, the speed setting option canresult in an increase in installation expenditure and, typically, a less favourable noise performance and an increase inpower input.Here, ebm-papst EC technology is a more eco-friendly and cost-efficient alternative. The EC motor with integratedcommutation electronics offers high efficiency across the entire speed range and optimal acoustic performanceat minimal installation expenditure.FeaturesACEC commutating electronicsSeries resistanceTransformerSpeed steppingPhase-angle controlPhase-angle controlwith sine filterFrequency inverterFrequency inverterwith sine filterIntegratedIntegrated withswitch powersupplyExternalInstallation + – + – – – – ++ – –Noise behaviour+++–––––+++++Power input––––––++++++Service life++––+–+++++ = positive + + = very positive – = negative – – = very negativeAcoustic performance of controlled motorsPower input of controlled motors[dBA][W]701500605010004050030010002000 3000 4000 5000 6000[CFM]010002000 3000 4000 5000 6000[CFM]20004000 6000 8000 10000 [m³/h]20004000 6000 8000 10000 [m³/h]Key:ebm-papst EC controlsFrequency inverter with sine filterPhase-angle control without sine filterPhase-angle control with sine filterTransformerKey:ebm-papst EC controlsFrequency inverter with sine filterPhase-angle control without sine filterPhase-angle control with sine filterTransformer414