Lenze EVF9383 - Manual (Page 190)

Optimising the operating behaviour
Boost correction with V/f characteristic control 6.11
6.11.3
l
6.11−6 EDSVF9383V EN 7.1−04/2012
(
Stop!
A longer operation of the motor in standstill may destroy the
motor by overheating, especially in case of small motors.
ƒ Connect the thermal contact (NC contact), PTC, or KTY of the
motor and activate the motor temperature monitoring of the
controller.
ƒ Operate self−ventilated motors with a blower, if required.
Setting voltage boost
1. Set a voltage boost in C0016. (
¶ 6.8−6)
– When C0016 = 0 % no boost is possible.
2. For magnetising the motor, consider enough time from controller
enable to the start of the speed ramp−function generator.
– The bigger the motor the longer the time for magnetisation. A motor
with the power of 90 kW requires up to 2 s.
– If the desired continuous current does not flow, correct the boost
using the codes C0080, C0095 and C1583.
Carry out a boost correction
3. If required, set the desired motor magnetising current (standstill
current) in C0095 which is to be achieved by the boost correction.
– The value in the Lenze setting has been evaluated by the controller
from the entered motor data of the motor nameplate.
– When C0095 = 0, the boost correction is deactivated.
4. Set the influence of the boost correction in C0080.
Adjustment