ABB ACQ810, Руководство по прошивке

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220 Parameters
40.03 Slip gain Defines the slip gain which is used to improve the estimated
motor slip. 100% means full slip gain; 0% means no slip
gain. The default value is 100%. Other values can be used if
a static speed error is detected despite of the full slip gain.
Example (with nominal load and nominal slip of 40 rpm): A
1000 rpm constant speed reference is given to the drive.
Despite of the full slip gain (= 100%), a manual tachometer
measurement from the motor axis gives a speed value of
998 rpm. The static speed error is 1000 rpm - 998 rpm = 2
rpm. To compensate the error, the slip gain should be
increased. At the 105% gain value, no static speed error
exists (2 rpm / 40 rpm = 5%).
0 … 200% Slip gain. 1 = 1%
40.04 Voltage reserve Defines the minimum allowed voltage reserve. When the
voltage reserve has decreased to the set value, the drive
enters the field weakening area.
If the intermediate circuit DC voltage
U
dc
= 550 V and the
voltage reserve is 5%, the RMS value of the maximum
output voltage in steady-state operation is
0.95 × 550 V / sqrt(2) = 369 V
The dynamic performance of the motor control in the field
weakening area can be improved by increasing the voltage
reserve value, but the drive enters the field weakening area
earlier.
-4 … 50% Voltage reserve. 1 = 1%
40.07 IR-compensation Defines the relative output voltage boost at zero speed (IR
compensation). The function is useful in applications with a
high break-away torque where direct torque control (DTC
mode) cannot be applied.
See also section IR compensation for a scalar controlled
drive on page 70 .
0.00 … 50.00% Voltage boost at zero speed in percent of nominal motor
voltage. 100 = 1%
40.10 Flux braking Defines the level of braking power.
Disabled Flux braking is disabled. 0
No. Name/Value Description FbEq
U / U
N
(%)
f (Hz)
Field weakening point
Relative output voltage. No
IR compensation.
Relative output voltage. IR
compensation set to 15%.
15%
100%
60% of nominal
frequency