Danfoss VLT AutomationDrive EZ FC 321, Руководство по программированию

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Parameter 1-47 Torque Calibration
Table 100: Parameter 1-47 Torque Calibration
1-47 Torque Calibration
Default value: Size related Parameter type: Option Setup: All setups
Conversion index: – Data type: Uint8 Change during operation: True
Use this parameter to optimize the torque estimate in the full speed range. The estimated torque is based on the shaft power, P
shaft
= P
m
- R
s
x I
2
. Make sure that the R
s
value is correct. The R
s
value in this formula is equal to the power loss in the motor, the cable,
and the drive. When this parameter is active, the drive calculates the R
s
value during power-up, ensuring the optimal torque esti-
mate and optimal performance. Use this feature in cases when it is not possible to adjust parameter 1-30 Stator Resistance (Rs) on
each drive to compensate for the cable length, drive losses, and the temperature deviation on the motor.
Op-
tion Name Description
[0] Off
[1] 1
st
start af-
ter pwr-up
Calibrates at the 1
st
start-up after power-up and keeps this value until reset by a power cycle.
[2] Every start Calibrates at every start-up, compensating for a possible change in motor temperature since last start-up.
The value is reset after a power cycle.
[3] 1
st
start
with store
The drive calibrates the torque at the 1
st
start-up after power-up. This option is used to update motor pa-
rameters:
Parameter 1-30 Stator Resistance (Rs).
Parameter 1-33 Stator Leakage Reactance (X1).
Parameter 1-34 Rotor Leakage Reactance (X2).
Parameter 1-37 d-axis Inductance (Ld).
[4] Every start
with store The drive calibrates the torque at every start-up, compensating for a possible change in motor tempera-
ture since last start-up. This option is used to update motor parameters:
Parameter 1-30 Stator Resistance (Rs).
Parameter 1-33 Stator Leakage Reactance (X1).
Parameter 1-34 Rotor Leakage Reactance (X2).
Parameter 1-37 d-axis Inductance (Ld).
[5] Enable ro-
tating AMA
II Performs rotation with 60% of nominal speed in Flux Sensorless with soft PID independent of selection in
parameter 1-01 Motor Control Principle . Measures Back EMF on PM motors and re-measures main reactance
(X
h
) on induction motors. Ensure that the motor poles specified in parameter 1-39 Motor Poles are correct
for accurate back EMF measurement.
[6] Enable 360°
turn OL
Sensorless: Performs a 360 degree test run in sensorless mode to verify the number of motor poles speci-
fied in parameter 1-39 Motor Poles .
Closed loop: Performs a 360 degree test run in sensorless mode to test the encoder before running in
closed loop. The speed is set in parameter 3-19 Jog Speed [RPM] . During the test run, the direction of rota-
tion is verified and the number of pulses per revolution is verified to match the configuration in
parameter
group 17-** Motor Feedb. Option or parameter group 5-** Digital In/Out based on the selected encoder.
After completing the 360 degree test run, either of the following messages are shown:
Encoder/Resolver OK
Encoder/Resolver Fail
Encoder/Resolver Inverted
AU373327181955en-000101 / 130R1208 | 75 Danfoss A/S © 2021.08
Parameter Descriptions
VLT® AutomationDrive EZ FC 321
Programming Guide