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Application Manual CDA3000
6 Control modes
Recording variables of the scope function in the DRIVEMANAGER
Optimization of the D-current
Adaptation of fault voltage characteristic
At low asynchronous motor resistances (e.g. in motors with higher power
outputs) it may be necessary to optimize the current controller by fault
voltage compensation by way of parameter 803-VCSFC in subject area
“_80 CC-Current controller”.
Note: A compromise needs to be found between formation of a high
torque at low speeds (VCSFC high) and stability of the con-
trol (VCSFC low).
Optimization instructions:
1. Run motor with reference 0 Hz (parameter 597-RF0 = 0 Hz) in
subject area “_59 DP-Driving profile generator”
2. Open scope and set the currents “d-axle current” (i
sd
)and“d-axle
reference current” (i
sd_soll
). (Note: User level 4 required!)
3. Compare the currents and set them to the following ratio by way of
parameter 803-VCSFC:
“d-axle current” (i
sd
)=0.9*“d-axle reference current” (i
sd_soll
)
Recording variable Abbreviation User level menu
d-axle reference current idsoll 4
q-axle reference current iqsoll 4
d-axle current isd 4
q-axle current isq 4
Phase current phase U isa 1
Phase current phase V isb 1
Phase current phase W isc 1
Apparent current after filter for current-
controlled startup
is_ramp 3
DC-link voltage uzk 1
Slip frequency wFR 4
Output frequency (SFC) wFS 3
Rotor frequency wRS_est 1
Table 6.16 Recording variables in the SFC structure diagram
3.
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