Lenze 9400 Manual de usuario descargar pdf (Pagina 182)

5 Motor interface

5.6 V/f control (VFCplus)

182

Lenze · Servo-Inverter 9400 HighLine · Reference manual · DMS 10.0 EN · 11/2013 · TD05/06

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5.6.1.1 Defining the V/f characteristic

Linear/square-law characteristic

C00950

serves to select the shape of the characteristic to adjust the characteristic to different load

profiles:

• Linear characteristic for drives with constant load torque over the speed.

• Square-law characteristic for drives with a linear or square-law load torque over the speed:

• Square-law V/f characteristics are mostly used in centrifugal pump and fan drives. However,

it must be checked in each individual case if your pump or fan drive can be used in this

operating mode!

• If your pump or fan drive is not suitable for operation with a square-law V/f characteristic,

you have to use the linear or user-definable V/f characteristic or the sensorless vector control

instead of the V/f control.

[5-16] Linear/square-law V/f characteristic

• The calculation of the characteristic considers the rated motor voltage (C00090) and the V/f

base frequency (C00951

).

Short overview: Parameters for V/f characteristic

 C00090: Rated motor voltage

 C00951: V/f base frequency

0

0

C00951

f

soll

0

0

C00951

f

soll



U

C00090

U

C00090



Parameter Info Lenze setting

Value Unit

C00950 VFC: V/f characteristic shape Linear (V/f)

C00951 VFC: V/f base frequency 50 Hz

C00952/1...11

VFC: Frequency interpol. point n Defining a user-defined V/f

characteristic ( 189)

C00953/1...11

VFC: Voltage interpol. point n

C00954/1...11

VFC: Activat. interpol. point n

1 2 ... 177 178 179 180 181 182 183 184 185 186 187 ... 953 954

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