Watson-Marlow MM440 - Manual (Page 237)

Issue 10/06 3 Functions
MICROMASTER 440 Operating Instructions
6SE6400-5AW00-0BP0 237
5 Application
adaptation
This is a characteristic which takes into consideration the special
technological issues of an application (e.g. textile applications),
a) Where the current limiting (Imax controller) only influences the output
voltage and not the output frequency, and
b) By inhibiting the slip compensation
6 Application
adaptation
with
FCC
This is a characteristic which takes into consideration the special
technological issues of an application (e.g. textile applications),
a) Where the current limiting (Imax controller) only influences the output
voltage and not the output frequency, and
b) By inhibiting the slip compensation
19 Independent
voltage
input
The user can enter the output voltage of the drive inverter, independently of
the frequency, using a BICO parameter P1330 via the interfaces (e.g.
analog input
→ P1330 = 755).
3.23.1.1 Voltage boost
Parameter range: P1310, P1311, P1312
r0056 bit 05
Warnings -
Faults -
Function chart number:
FP6100
For low output frequencies, the V/f characteristics only output a low output voltage.
Even at low frequencies, the ohmic resistances of the stator winding play a role,
which are neglected when determining the motor flux in Section 3.23.1. This means
that the output voltage can be too low in order to
¾
implement the magnetization of an induction motor,
¾ to hold the load
¾ to compensate voltage drops (ohmic losses in the winding resistances) in the
system or
¾ to provide a breakaway / accelerating / braking torque.
The output voltage can be increased (boosted) in MICROMASTER using the
following parameters (refer to Table 3-39):