![WEG SSW-06.0085 Скачать руководство пользователя страница 130](http://html.mh-extra.com/html/weg/ssw-06-0085/ssw-06-0085_user-manual_950611130.webp)
CHAPTER 7 - APPLICATIONS AND PROGRAMMING
131
7.1.6.3 Loads with constant torque
and S speed curve
(P202=3 and P120=3
points)
1) Through the load curve you can set the torque 10% to 20% higher
than the load torque for the initial and the end points, P121 and
P122, are 30% to 40% higher than load torque for the middle point
P123;
2) Maintain P124 between 45% to 55% and set P102 according to the
starting time;
3) For the first start you can use a speed measuring instrument, thus
ensuring the desired acceleration or the desired speed curve;
4) If no load curve is available, but you are sure that the torque is
constant, you can use the torque limit, P120=1 for executing the
first start-ups and changing to this function afterwards.
Figure 7.13
– Starting with quadratic torque control, 3 points, with constant load
7.1.6.4 Loads with quadratic torque
and S speed curve
(P202=3 and P120=2
points)
1)
Through the linear torque ramp you can obtain a speed curve
very similar to a S-curve with quadratic load, but not very steep;
2)
Through the load curve you can set the torque 10% to 20% higher
than the load torque for the initial point P121, and 20% to 30%
than the load torque for the end point, P122;
3)
If no load curves are available, proceed as follows:
3.1) Set P121 to the required torque to run the motor + load;
3.2) Set P122 to 110% to 130% of the rated motor torque;
3.3) First set P102 firstly to low values, 10s to 15s and then increase
these values.
Figure 7.14
– Starting with linear torque control, 2 points, quadratic load
Tn(%)
Start
Speed
P124
0
Enable
Disable
t(s)
Maximum Time
P121
Tn Nominal
Load Torque
Torque Control
P123
P102
P122
P120
=3
P102
Torque
Control
P401
P400
P122
P121
P640
P406
P404
P402
P405
P123
P124
P104
=0
Tn(%)
Start
Speed
0
Enable
Disable
t(s)
Maximum Time
P121
Tn Nominal
Load Torque
Torque Control
P102
P122
P401
P400
P640
P406
P404
P402
P405
P120
=2
P102
Torque
Control
P122
P121
P104
=0
Phone: 800.894.0412 - Fax: 888.723.4773 - Web: www.clrwtr.com - Email: [email protected]