Lenze 8400 motec Manual - Manual (Page 90)

Commissioning
Overview of the commissioning steps with keypad
Keypad control
6
l
90 EDS84DG752 EN 4.0
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Note!
In the Lenze setting, the V/f characteristic control (VFCplus) with linear
characteristic is set in C00006 as motor control.
ƒ The V/f characteristic control (VFCplus) is an operating mode for standard
frequency inverter applications based on a simple and robust control
process which is suitable for the operation of machines with linear or
square−law load torque characteristic (e.g. fans).
ƒ The parameter settings have been set in advance in such a way that, if the
drive controller and 50 Hz asynchronous machine match each other in terms
of performance, the drive controller is immediately ready for operation
without any further parameter setting work and the motor works
satisfactorily.
I
Tip!
Recommendations for the following application cases:
ƒ If the controller and motor differ greatly from each other in terms of
performance: Set the Imax limit (in motor mode) in C00022 to double the
rated motor current.
ƒ If a higher starting torque is required: In idle state of the motor, set the
Vmin boost in C00016 in such a way that the rated motor current flows at a
field frequency of f = 3 Hz (display in C00058).
ƒ For noise optimisation: As switching frequency in C00018, set the selection
"3: 16 kHz var./drive−optimised".
ƒ If a high torque is to be available at low speed and without a feedback:
Select the "vector control (SLVC)" mode in C00006 as motor control.