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Note
Maximum frequency resonance damping
When p1349 = 0, the changeover limit is automatically set to 95% of the rated motor
frequency, but only up to a maximum of 45 Hz.
Function diagram
FP 6310
Parameters
• r0066
• r0078
• p1338
• p1339
• p1349
7.3.3
Slip compensation
Description
The slip compensation acts so that the speed of induction motors is essentially kept constant
independent of the load (M
When the load is increased from M
so that the resulting frequency, and therefore also the motor speed, remain constant. For a
decrease in the load from M
accordingly.
For p1300 = 4 and 7 (V/f controllers with ECO), the slip compensation must be activated to
ensure correct operation.
For p1300 = 5 and 6 (textiles) the slip compensation is internally disabled in order to be able
to precisely set the output frequency.
If a motor holding brake is applied, a setting value can be specified at the slip compensation
output via p1351. A parameter setting of p1351 > 0 automatically activates the slip
compensation (p1335 = 100%).
Enclosed Drives
Operating Instructions, 12/2018, A5E36652151A
Resonance damping and slip compensation
Output frequency
Torque-generating actual current value
V/f control resonance damping gain
V/f control resonance damping filter time constant
V/f control resonance damping maximum frequency
or M
).
1
2
to M
1
to M
, the setpoint frequency is automatically decreased
2
1
Setpoint channel and closed-loop control
, the setpoint frequency is increased automatically
2
7.3 V/f (V/Hz) control
455
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