Danfoss VLT AQUA Drive FC 202 Design Manual

Also see for VLT AQUA Drive FC 202: Service guide Installation guide Installation guide Operating guide Installation guide

Contents

UL Underwriters Laboratories (US organization for thesafety certification)V VoltsVT Variable torqueVVC+ Voltage Vector Control plusTable 14.1 Abbreviations and Symbols14.2 DefinitionsBrake resistorThe brake resistor is a module capable of absorbing thebrake power generated in regenerative braking. Thisregenerative brake power increases the DC-link voltageand a brake chopper ensures that the power is transmittedto the brake resistor.Break-away torquens = 2 × par . 1 − 23 × 60 spar . 1 − 39175ZA078.10Pull-outRPMTorqueIllustration 14.1 Break-away Torque ChartCoastThe motor shaft is in free mode. No torque on the motor.CT characteristicsConstant torque characteristics used for all applicationssuch as conveyor belts, displacement pumps, and cranes.InitializingIf initializing is carried out (parameter 14-22 OperationMode), the drive returns to the default setting.Intermittent duty cycleAn intermittent duty rating refers to a sequence of dutycycles. Each cycle consists of an on-load and an off-loadperiod. The operation can be either periodic duty or non-periodic duty.Power factorThe true power factor (lambda) takes all the harmonicsinto consideration and is always smaller than the powerfactor (cos phi) that only considers the 1st harmonics ofcurrent and voltage.cosϕ = P kWP kVA = Uλ x Iλ x cosϕUλ x IλCos phi is also known as displacement power factor.Both lambda and cos phi are stated for Danfoss VLT®drives in chapter 7.3 Mains Supply.The power factor indicates to which extent the driveimposes a load on the mains supply.The lower the power factor, the higher the IRMS for thesame kW performance.In addition, a high-power factor indicates that theharmonic currents are low.All Danfoss drives have built-in DC coils in the DC link tohave a high-power factor and reduce the THD on the mainsupply.Pulse input/incremental encoderAn external digital sensor used for feedback information ofmotor speed and direction. Encoders are used for high-speed accuracy feedback and in high dynamic applications.Set-upSave parameter settings in 4 set-ups. Change between the4 parameter set-ups and edit 1 set-up while another set-upis active.Slip compensationThe drive compensates for the motor slip by giving thefrequency a supplement that follows the measured motorload, keeping the motor speed almost constant.Smart logic control (SLC)The SLC is a sequence of user-defined actions executedwhen the associated user-defined events are evaluated astrue by the SLC. (Parameter group 13-** Smart Logic).FC standard busIncludes RS485 bus with FC protocol or MC protocol. Seeparameter 8-30 Protocol.ThermistorA temperature-dependent resistor placed where thetemperature is to be monitored (drive or motor).TripA state entered in fault situations, such as when the driveis subject to an overtemperature or when it protects themotor, process, or mechanism. Restart is prevented untilthe cause of the fault has disappeared and the trip state iscanceled. Cancel the trip state by either:• Activating reset.• Programming the drive to reset automatically.Do not use trip for personal safety.Trip lockA state entered in fault situations when the drive isprotecting itself and requires physical intervention. Alocked trip can only be canceled by cutting off mains,removing the cause of the fault, and reconnecting thedrive. Restart is prevented until the trip state is canceledby activating reset.Appendix Design GuideMG22B102 Danfoss A/S © 05/2017 All rights reserved. 12514 14