6-20
Application Manual CDA3000
6 Control modes
Note: The current injection reference is a percentage of the device
rated current (I
GN
) of the inverter module.
Up to firmware V1.35 at motor power outputs < inverter
output the reference should be adjusted manually to 80% of
the motor rated current (I
MN
).
%
From firmware V1.4 the adjustment is made during auto-
tuning (see section 5.1 “_15 FC-Initial commissioning”)to
100% of the motor rated current.
From firmware V2.10 the adjustment is made during auto-
tuning to 120% of the motor rated current up to 1.5 times the
motor rated slip. This limit frequency CIFMx is likewise auto-
matically calculated during auto-tuning. Also, after the time
CITMx the injected current is reduced to CICTx.
Attention: In motors with internal cooling:
When application data sets DRV_4, DRV_5, ROT_2, ROT_3,
M-S_2 or M-S_4 are switched from closed-loop control mode
300-CFCON=FOR to open-loop control mode VFC, parame-
ter 597-RF0=0Hz from subject area _59DP Driving profile
generator must be set to OFF. Otherwise at standstill a cur-
rent in the amount of CICNx will be injected which may over
time destroy the motor by overheating, because internally
cooled motors have no fan cooling when at a standstill.
CICNx
I
MN
I
GN
------- 80⋅=
[I%]
t [s]
CICTx
CICNx
CICTx
CITNx
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