VFD-F (CURVE).cdr

5.12 Group 11: Fan and Pump Control ParametersVFD-F Series11 - 00 V/f Curve Selection Factory Setting: 00Settings 00: Determined by group 101: 1.5 power curve02: 1.7 power curve03: 2 power curve04: cube curve This parameter is to set V/f curve. If this parameter isn’t set to 00, parameter 01-03 and01-04 will disable. Input current of the motor could divide into two orthogonal vectors: magnetic vector andtorque vector. Gap flux, which is produced by Magnetic vector, is in direct proportion withoutput voltage of motor. Torque vector produces torque. Torque is in direct proportion withthe result of magnetic vector multiply by torque vector. In theory, if the value of magnetvector is the same with torque vector (in unsaturated flux condition), the input current isminimum. If motor loading is unsteady torque loading (loading torque is in direct proportionwith speed. For example, the loading of fan or pump), loading torque is low during lowspeed, suitable lower input voltage will decrease input current of magnetic field to lower fluxloss and iron loss of the motor and promote whole efficiency.5 When this parameter is set to high power V/f curve and low frequency torque is lower, it isnot suitable for AC drive to accel/decel quickly. If it needs to accel/decel quickly, it is notrecommended to use this parameter.01-02 Voltage%100901.5 power curve801.7 power curve70602 power curve503 power curve40Frequency20%1001-010 20 40 60 80 100V/F Curve Diagram11 - 01 Circulative Control Factory Setting: 00Settings 00: No function01: Time circulation (by time)02: Fixed amount circulation (by PID)03: Fixed amount control (an AC drive runs with 4 motors) This parameter is to set an AC drive runs with multiple motors in circulation control mode.DELTA ELECTRONICS, INC. ALL RIGHTS RESERVED 5-63