Delta Electronics VFD-F Series V/F Curve Diagram, Circulative Control, Settings, No function

VFD-F Series

Factory Setting: 00

5.12 Group 11: Fan and Pump Control Parameters

11 - 00 V/f Curve Selection

Settings	00: Determined by group 1
	01: 1.5 power curve
	02:	1.7 power curve
	03:	2 power curve

04: cube curve

This parameter is to set V/f curve. If this parameter isn’t set to 00, parameter 01-03 and 01-04 will disable.

Input current of the motor could divide into two orthogonal vectors: magnetic vector and torque vector. Gap flux, which is produced by Magnetic vector, is in direct proportion with output voltage of motor. Torque vector produces torque. Torque is in direct proportion with the result of magnetic vector multiply by torque vector. In theory, if the value of magnet vector is the same with torque vector (in unsaturated flux condition), the input current is minimum. If motor loading is unsteady torque loading (loading torque is in direct proportion with speed. For example, the loading of fan or pump), loading torque is low during low speed, suitable lower input voltage will decrease input current of magnetic field to lower flux loss and iron loss of the motor and promote whole efficiency.

When this parameter is set to high power V/f curve and low frequency torque is lower, it is not suitable for AC drive to accel/decel quickly. If it needs to accel/decel quickly, it is not recommended to use this parameter.

	01-02Voltage%
100	1.5 power curve
90
80	1.7 power curve
70

602 power curve

		50	3 power curve
		40						Frequency
		30
								%
		20
		10						01-01
		0	20		40	60	80	100
				V/F Curve Diagram
11 - 01	Circulative Control								Factory Setting: 00
	Settings	00: No function
		01: 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.

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