Lenze 8200 Frequency inverters - Manual (Page 117)

Commissioning
8200SHB0199 5-12
5.4.2.3 Optimise V/f-characteristic control with constant V
min
boost
(C014 = -2-/ -3-)
Required codes
Code Name Possible settings IMPORTANT Code Name
Lenze Choice Info
IMPORTANT
C015 V/f-rated frequency Standard controllers C015
820X 50.00 30.0 {0.05 Hz} 960.00
821X/822X/
824X
50.00 7.50 {0.02 Hz} 960.00
C015 V/f-rated frequency 50.00 7.50 {0.02 Hz} 960.00 Variant “HVAC”
C016 V
min
setting C016
820X * 0.0 {0.2 %} 40.0 *depends on the unit
821X/822X/
824X
0.0 0.0 {0.2 %} 40.0
C021 Slip compensation Standard controllers C021
820X 0.0 0.0 {0.1 %} 12.0
821X/822X/
824X
0.0 0.0 {0.1 %} 20.0
C021 Slip compensation 0.0 -50.0 {0.1 %} 50.0 * depends on
the unit
Variant “HVAC” C021 Slip compensation 0.0 -50.0 {0.1 %} 50.0 * depends on
the unit
Variant “HVAC”
C077* Gain I
max
controller 0.25 0.00 {0.01} 1.00 Variant “HVAC”
(see chapter 7.5.4)
C078* Integral action time
I
max
controller
65 12 {1 ms} 9990
Variant “HVAC”
(see chapter 7.5.4)
Setting sequence
1.If necessary, select V/f
characteristic (C014).
2.Select V/f-rated frequency
(C015).
- The V/f-rated frequency determines the slope of the V/f characteristic and has considerable
influence on the current, torque and power performance of the motor.
- An internal mains voltage compensation compensates deviations in the mains during operation.
Therefore, they do not have to be considered for the setting of C015.
Adjustment
Calculate the frequency to be set under C015:
C015 [Hz]
400 V
V
rmotor
[V]
ô f
dr
[Hz]
V
rmotor
Rated voltage to motor nameplate [V]
f
dr
Rated frequency to motor nameplate [Hz]
For standard motors with f
dr
= 50 Hz, the following settings result for C015:
Motor voltage Motor connection C015
230/400 V Y 50 Hz
230/400 V D 87 Hz
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