Tension sensorless torque control details
136
TENSION SENSORLESS TORQUE CONTROL
Mechanical loss compensation function selection (Pr.1230, Pr.1419 to
Pr.1429)
• The maximum of five approximate break points can be set as mechanical loss points. Set mechanical loss parameters
(mechanical loss setting frequency, mechanical loss) and linearly interpolate the values between the set points.
• The mechanical loss compensation value is calculated from the mechanical loss setting and the motor rotation speed
(output frequency) and added to the torque command value. The mechanical loss compensation amount is added as
follows according to the winding/unwinding setting.
• For setting the mechanical loss (
Pr.1419
,
Pr.1421
,
Pr.1423
,
Pr.1425
,
Pr.1427
,
Pr.1429
), regard 1000 as 0% and set an
offset from 1000.
• Operate the line with a load (with a reel inside), and set the motor speed frequency and the monitored torque value in
Pr.1420 to Pr.1429
.
NOTE
• When "9999" is set in the mechanical loss setting frequency, the corresponding mechanical loss setting is invalid.
• If the same frequency is set in two or more of the
Pr.1420
,
Pr.1422
,
Pr.1424
,
Pr.1426
, and
Pr.1428
settings, the mechanical
loss set in the parameter with the smallest parameter number is valid.
• When the mechanical loss setting frequency (1 to 5) setting is 0 Hz, the
Pr.1419
setting is invalid.
Mechanical loss compensation function setting example
• The mechanical loss compensation value after linear interpolation is limited within the range of
±
100%.
• The pairs of parameters (
Pr.1420
/
Pr.1421
), (
Pr.1422
/
Pr.1423
), (
Pr.1424
/
Pr.1425
), (
Pr.1426
/
Pr.1427
), and (
Pr.1428
/
Pr.1429
) are arranged internally in the inverter from the pair with the smallest mechanical loss setting frequency to the one
with the largest.
Winding/unwinding
Commanded torque after mechanical loss compensation
Winding shaft (
Pr.1230
= "0")
Torque command value minus mechanical loss compensation value
Unwinding shaft (
Pr.1230
= "1")
Torque command value plus mechanical loss compensation value
Parameter setting
Actual mechanical loss setting
900.0 to 999.9%
-100.0 to -0.1%
1000.0%
0.0%
1000.1 to 1100.0%
0.1 to 100.0%
N1
Pr.1420
N2
Pr.1422
Pr.1421
L1
Pr.1423
L2
100%
Mechanical loss compensation value
Motor speed
Mechanical loss setting frequency
Mechanical loss
Pr.1419
LB
Pr.1420
= 10 Hz
Pr.1419
= 1000%
Pr.1422
= 20 Hz
Pr.1421
= 1030%
Pr.1424
= 9999
Pr.1423
= 1080%
Pr.1426
= 9999
Pr.1425
= 1000%
Pr.1428
= 9999
Pr.1427
= 1000%
Pr.1429
= 1000%
Mechanical loss compensation value
Motor
Rotation speed
Mechanical loss setting frequency
Mechanical loss
Pr.1420
= 50 Hz
Pr.1419
= 1000%
Pr.1422
= 20 Hz
Pr.1421
= 1010%
Pr.1424
= 30 Hz
Pr.1423
= 1030%
Pr.1426
= 10 Hz
Pr.1425
= 1040%
Pr.1428
= 40 Hz
Pr.1427
= 1070%
Pr.1429
= 1080%
N1
Pr.1420
N2
Pr.1422
N3
Pr.1424
N4
Pr.1426
N5
Pr.1428
Pr.1421
L1
Pr.1423
L2
Pr.1425
L3
Pr.1427
L4
Pr.1429
L5
Pr.1419
LB
Summary of Contents for A800 Plus Series
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