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① The closed-loop starting current control optimizes the speed control at low speeds
② The inverter compensates the voltage drop across the motor stator resistance
Figure 6-42 Characteristics after selecting Standard Drive Control
Table 6-49 Linear and parabolic characteristics
Requirement Application examples Remark Character‐
istic
Parameter
The required torque is in‐
dependent of the speed
Conveyor belts, roller conveyors, chain
conveyors, eccentric worm pumps, com‐
pressors, extruders, centrifuges, agita‐
tors, mixers
- Linear p0501 = 0
The required torque in‐
creases with the speed
Centrifugal pumps, radial fans, axial fans Lower losses in the motor
and inverter than for a lin‐
ear characteristic.
Parabolic p0501 = 1
Additional information on the characteristics can be found in the parameter list and in the
function diagrams 6851 ff of the List Manual.
Advanced commissioning
6.24 Motor control
Converter with the CU230P-2 Control Units
Operating Instructions, 09/2017, FW V4.7 SP9, A5E34257946B AE 301
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