Parameter Description | Issue 01/06 |
3.29.1.1Slip compensation
P1335[3] Slip compensation |
|
| Min: | 0.0 | |
CStat: | CUT | Datatype: Float | Unit: % | Def: | 0.0 |
CONTROL | Active: Immediately | QuickComm.: No | Max: | 600.0 |
Level
2
Dynamically adjusts output frequency of inverter so that motor speed is kept constant independent of motor load.
In the
Increasing the load from M1 to M2 (see diagram) will decrease the motor speed from f1 to f2, due to the slip. The inverter can compensate for this by increasing the output frequency slightly as the load increases. The inverter measures the current and increases the output frequency to compensate for the expected slip.
Without slip compensation |
| With slip compensation | ||
M |
|
| M |
|
M2 |
|
| M2 |
|
M1 |
|
| M1 |
|
| ∆ f | f | ∆ f | f |
|
|
| ||
| f2 f1 |
| f2 f1 | fout M2 |
|
|
|
| fout M1 |
Index: |
|
|
|
|
P1335[0] | : 1st. Drive data set (DDS) |
|
| |
P1335[1] | : 2nd. Drive data set (DDS) |
|
| |
P1335[2] | : 3rd. Drive data set (DDS) |
|
| |
Value: |
|
|
|
|
P1335 = | 0 % : |
|
|
|
Slip compensation disabled.
P1335 = 50 % - 70 % :
Full slip compensation at cold motor (partial load).
P1335 = 100 % :
Full slip compensation at warm motor (full load).
Range of slip compensation :
|
|
|
| f out |
|
% |
|
|
| fN | with |
|
|
|
|
| slip compensation |
P1335 |
|
|
|
| without |
|
|
|
|
| slip compensation |
|
|
| f out |
| f set |
6 % | 10 % | 100 % | fN | 6 % 10 % | fN |
Notice:
The applied value of the slip compensation (scaled by P1335) is limited by following equation:
fSlip_act
r0065
fset
r1078
P1335
100
Setpoint channel
fSlip_comp_max P1335
fact
r0063
= P1336 ⋅
f Slip_comp_max 100 r0330
r1337
fout
162 | MICROMASTER 440 Parameter List |