Delta Electronics AC Drive VFD-F Series Spezifikationen PDF herunterladen (Seite 106)

VFD-F Series

5-73

5.12 Group 11: Fan and Pump Control Parameters

11 - 00

V/f Curve Selection

Factory Setting: 00

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.

Frequency

02040

100

Voltage%

01-02

01-01

1.5 power curve

1.7 power curve

2 power curve

3 power curve

V/F Curve Diagram

1 2 ... 101 102 103 104 105 106 107 108 109 110 111 ... 189 190

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Delta Electronics AC Drive VFD-F Series Spezifikationen Seite 106