Figure 24: Minimum Current Course - KEB COMBIVERT F6 Programming Manual

Protection functions
fc32 min. current mode
Bit Function Valu
e
0
1
0...2
mode
2
The compensation of the minimum current is in the range of -2*Imin...+2*Imin. If,
for example, the stabilisation current is adjusted via the Isd offset (ds55), it may not
be possible to compensate this via the minimum current function in order to
achieve the "set" sign.
21
1

Figure 24: Minimum current course

SM/IPM without encoder with ramp time (tr, fc32[3]) and Imin=20% of rated motor
current, speed leakage values via stabilisation current (here ds38=100%,
ds35=50%, ds36=10%, ds37=20%). The speed hyteresis results from ds37 +
(ds37-ds36).
© 2022 KEB Automation KG
Plaintext Notes
off Off
The minimum current is monitored de-
pending on the setpoint in the stabilising
stabilisation current
current axis.
The minimum current is monitored de-
pending on the level of the total current
setpoint.
I.e. if the total current setpoint is above
the minimum current, no additional stabi-
apparent current
lisation current is supplied. This depend-
ency can cause the system to oscillate if
the position is misaligned, but has the
advantage that the motor is not heated
with additional current under load.
1fghfh
0x3720 Sub Idx. 1
115