V/F Control With Linear Characteristic - Siemens SINAMICS G120 CU240B-2 Operating Instructions Manual

Functions
7.6 Motor control
7.6.1.1

V/f control with linear characteristic

V/f control with a linear characteristic is
mainly used in applications in which the
motor torque must be independent of the
motor speed. Examples of such
applications include horizontal conveyors
or compressors.
V/f control with a parabolic characteristic
is used in applications in which the motor
torque increases with the motor speed.
Examples of such applications include
pumps and fans.
V/f control with square-law characteristic
reduces the losses in the motor and
inverter due to lower currents than when
a linear characteristic is used.
Parameters
P1300
Note
V/f control with a square-law characteristic must not be used in applications in which a high
torque is required at low speeds.
170
Description
Open-loop/closed-loop control operating mode
0: V/f control with linear characteristic
2: V/f control with parabolic characteristic
Inverter with CU240B-2 and CU240E-2 Control Units
Operating Instructions, 07/2010, FW 4.3.2, A5E02299792B AA