Lenze DSD - Manual (Page 213)

7A
pp
lic
ati
on
s
7.2
2
Wind
ing drive for
re
wind
er/unwinde
r
Lenze ·
Dri
ve
Soluti
on
Desi
gner ·
M
anual
· DM
S
4.
2
EN
·
12/2013 ·
TD23
21
3
_ _
_ _
_ _
_ _
_ _
_ _
_ _
_ _
_ _
_ _
_ _
_ _
_
_ _
_ _
_ _
_ _
_ _
_ _
_ _
_ _
_ _
_ _
_ _
_ _
_ _
_ _
_ _
_ _
_ _
_ _
_ _
_
Description Indirect tension control via the
drive torque with disturbance com-
pensation (friction, acceleration).
Closed-loop torque-controlled
mode with a higher-level trac-
tion control loop and distur-
bance compensation (friction,
acceleration). Actual value of
tensile force is detected via sen-
sor in web.
Closed-loop speed-controlled
mode with a higher-level traction
control loop and disturbance
compensation (friction, accelera-
tion). Actual value of tensile force
is detected via sensor in web.
Tension control via dancer. Speed-control-
led and position-controlled operation of
the drive. Further tasks of the dancer: de-
tection of the actual position. Web accu-
mulator for the compensation of
eccentricities of the reel (e.g. in the case of
unwinders) and discontinuities.
The tensile force is determined by the
upstream system. The winder acts as
master in the drive system and conveys
material at a constant circumferential
speed. Closed-loop control of the cir-
cumferential speed and speed.
Application area Universal, cost-effective winding
procedure for low to high require-
ments with regard to tensile force
quality and tensile force profile.
Winding procedure for high re-
quirements with regard to ten-
sile force quality and tensile
force profile.
Winding procedure for high re-
quirements with regard to tensile
force quality and tensile force
profile.
Universal, cost-effective winding proce-
dure for low to high requirements with re-
gard to tensile force quality and tensile
force profile. Well suited for eccentric
reels, e.g. in the case of unwinders.
Unwinders for slitting lines.
Control system
SC
Rewinder/unwinder + + + + +
VFCplus without encoder
Rewinder/unwinder – – – 0 0
SLVC
Rewinder + – – 0 +
Unwinder – – – – –
VFCplus with encoder
Rewinder 0 – – 0 0
Unwinder – – – 0 0
VFCplus eco
Rewinder/unwinder – – – – –
+ Well-suited SC Servo control
0 Suitable with restrictions VFCplus V/f control
– Not suitable VFCplus eco V/f control with energetically optimised field injection in the partial load operational range
1) Comparison of tension-controlled winder control modes ( 214) SLVC Sensorless vector control
Tension control (M) Tension control (M) 1) Tension control (n) 1) Dancer position control (n) Velocity control (n)