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MotorsMotors made by ebm-papstIn AC and EC technology, ebm-papst relies on the proven external-rotor motor principle, with the rotor turningaround the stator within. Advantages of the ebm-papst external-rotor principle are:– Space saving design due to integrated bearings and direct installation inside the impeller– Lower load and more precise balancing of the bearing due to the fixed connection of all rotating elements– Prolonged service life due to the motor-impeller unit placed right within the air flowThe ebm-papst motors achieve very good results in efficiency and acoustic behaviour when used in EC technology.FeaturesAC motorsEC motorsShaded-pole motorSingle-phasecapacitor motor3-phase motorSingle-core motor3-core motor1 ~ AC voltageconnectorLimited useYes Yes Yes Yes(Steinmetz circuit)3 ~ AC voltageconnectorNoNoYesNoYesDC voltageconnectorNoNoNoYesYesElectronics(see p. 418)Electronics(see p. 418)Design ofcircuit diagram- Stator -Steinmetz circuitRotor principleEfficiencyContinuous speedsetting integratedNoise behaviourSquirrel cage Squirrel cage Squirrel cage Magnetic rotor Magnetic rotorLow Medium GoodExcellent ExcellentNo No NoYes YesMedium Good ExcellentMedium Excellent410
AC axialK seriesAC axialA seriesTechnologyEC axial <strong>fans</strong>EC axialS seriesQ-motorESMEC-SYSTEMSAccessoriesAC axialS seriesAC axial <strong>fans</strong>GeneralinformationAC motorsAC motors (induction motors) are based in their function on the principleof the asynchronous rotation of the stator rotating field and rotor.Torque curves of the motor types[Ncm]213Shaded-pole motorEach pole of the motor is divided electro-magnetically into a mainand auxiliary pole (split) via a cage winding in order to generate astarting torque.At ebm-papst, shaded-pole motors are available as 2 or 4-polesymmetrical external or internal rotor designs.M SaM St5M K4Key:1 - EC motor5 - System characteristic2 - 3-phase motor M St - Starting torque3 - Single-phase motor M Sa - Saddle torque4 - Shaded-pole motor M K - Breakdown torqueAdvantages:– Extremely robust motor design due to cast squirrel cage rotorand stable bearing system– Cost-efficient motor– Extremely easy to connect– Long service lifeStart-up currentThe start-up current of our AC motors is maximally 4x higher than thenominal current given.411Contacts
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Axial fansversion 07The engineer’
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