Axial fans

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Speed setting with EC motorsThe speed of EC motors is set via commutation electronics. Via electroniccircuits and depending on the rotor position, this commutation switchesthe motor currents on and off.Principle of AC-fed commutation electronicsPrinciple of DC-fed commutation electronicsInterfaceControl unitPower unitInterfaceControl unitPower unit0-10 VDCPWMDC/DC transformerEMC filterRectifier0-10 VDCPWMCommutations unitEMC filterFeedbackCommutations unitLink electrolytic capacitorFeedbackCANLONDriveInverter stageCANLONDriveInverter stageRS485RS485(with electrically isolated interface)Integrated commutation electronics– Compact unit– Easy to install– Low installation expenditure– Can be operated all over the worldNote: Motors with 12-72 VDC supply voltage have to be fed viaelectrically isolated supply unit.ACDCIntegrated commutation electronics with switch power supply– Protective extra-low voltage 24 / 48 VDCNote: Switch power supply is not included but has to be orderedas accessory.ACDC418
AC axialA seriesEC axial <strong>fans</strong>EC axialS seriesQ-motorESMEC-SYSTEMSTechnologyAccessoriesAC axialK seriesAC axialS seriesAC axial <strong>fans</strong>GeneralinformationTypical features of the ebm-papst commutation electronics:– Input for analogue and digital signals– Open and closed loop control as well as monitoring of the motor– Integrated EMC filter– High efficiency throughout the entire speed range– Speed setting via linear set value (0-10 VDC) or PWM signal– Low-noise operation across the entire speed range– Minimal extra costs for additional functions(open/closed loop control)– Optional BUS interfaceTypes of alarms and reactions with EC motorsWith DC-fed EC motors, certain faults in modes of operation arerecognised by the electronics, and the motor is automatically restarted.With AC-fed EC motors, certain faults in modes of operation arerecognised by the electronics, and the motor is switched off.The motor restarts automatically after the following failures have beendiagnosed:– Line failure– Phase failure– Line under-voltage– DC link voltage too high or too low– Locked rotorWith the following types of failures, there is no automatic restart.Here, hardware or software reset is required:– Motor temperature too high– Temperature of cooling element or ambient temperature ofelectronics too high– Hall failureHardware resetSwitching off the fan and restarting it after one minute results inhardware reset.Software resetSoftware reset is via ebmBUS and LISA software, hand-held controlterminal, or PDA with Fan Control Software.419Contacts
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Axial fansversion 07The engineer’
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