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Elmark Automatyka S.A.
ul. Niemcewicza 76, 05-075 Warszawa, tel. (+48) 22 773 79 37; [email protected]; www.elmark.com.pl
NIP: 5252072585; KRS: 0000803828, Sąd Rejonowy dla M-St. Warszawy, XIV Wydział Gosp. KRS; Kapitał Zakładowy 525.000 zł, w pełni opłacony
P4.07
Multi-point V/F frequency 3 (F3)
Default
0
Setting Range
P4.05~rated motor frequency (P2.04)
P4.08
Multi-point V/F voltage 3 (V3)
Default
0.0%
Setting Range
0.0%~100.0%
These six parameters are used to define the multi-point V/F curve. The multi-point V/F curve is set based on the motor's load
characteristic. The relationship between voltages and frequencies must meet: V1 < V2 < V3, F1 < F2 < F3. At low frequency, higher
voltage may cause overheat or even burnt out of the motor and overcurrent stall or overcurrent protection of the AC drive.
Figure 4-6 Setting of multi-point V/F curve
V1-V3: multi-spot V/F 1-3 stage voltage percentage F1-F3: multi-spot V/F 1-3 stage frequency
Vb: Rated motor voltage Fb: Rated motor running frequency
P4.09
V/F slip compensation gain
Default
0.0%
Setting Range
0.0%~200.0%
This parameter is valid only for the asynchronous motor.
It can compensate the rotational speed slip of the asynchronous motor when the load of the motor increases, stabilizing the motor
speed in case of load changes.
If this parameter is set to 100%, it indicates that the compensation when the motor bears rated load is the rated motor slip. The
rated motor slip is automatically obtained by the AC drive through calculation based on the rated motor frequency and rated
motor rotational speed in group P2.
When adjust the V/F slip compensation gain, Generally, At rated load, if the motor rotational speed is different from the target
speed, slightly adjust this Parameter.
P4.10
V/F over-excitation gain
Default
64
Setting Range
0~200
During deceleration of the AC drive, over-excitation can restrain rise of the bus voltage, to prevent the overvoltage fault. The
larger the over-excitation is, the better the restraining result is.
Increase the over-excitation gain if the
AC drive is liable to overvoltage error during deceleration. However, too large over
excitation gain may lead to an increase in the output current. Set P4.09 to a proper value in actual applications.
Set the over-excitation gain to O in the applications where the inertia is small and the bus voltage will not rise during motor
deceleration or where there is a braking resistor.
P4.11
V/F oscillation suppression gain
Default
Model dependent
Setting Range
0~100
Summary of Contents for elmatic ED2000
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