Subject to changes without notice !
Änderungen vorbehalten !
Gearless Lift Machine
WSG-SF
Operating Instructions
EN
Code: GM.8.004284.EN
Date:
28. Jan 2020
Version: 0.16
Page: 68
Preface and general information
INTORQ | BA 14.0214 | 09/2017
7
1.4
Abbreviations used
Letter sym-
bol
Unit
Designation
F
R
N
Rated frictional force
I
A
Current
I
H
A
Holding current, at 20 °C and holding voltage
I
L
A
Release current, at 20 °C and release voltage
I
N
A
Rated current, at 20 °C and rated voltage
M
A
Nm
Tightening torque of fastening screws
M
dyn
Nm
Braking torque at a constant speed of rotation
M
K
Nm
Rated torque of the brake, rated value at a relative speed of rotation of 100
rpm
n
max
rpm
Maximum occurring speed of rotation during the slipping time t
3
P
H
W
Coil power during holding, after voltage change-over and 20 °C
P
L
W
Coil power during release, before voltage change-over and 20 °C
P
N
W
Rated coil power, at rated voltage and 20 °C
Q
J
Quantity of heat/energy
Q
E
J
Max. permissible friction energy for one-time switching, thermal parameter of
the brake
Q
R
J
Braking energy, friction energy
Q
Smax
J
Maximally permissible friction energy for cyclic switching, depending on the
operating frequency
R
m
N/mm
2
Tensile strength
R
N
Ohms
Rated coil resistance at 20 °C
R
z
µm
Averaged surface roughness
S
h
1/h
Operating frequency: the number of switching operations evenly spread over
the time unit
S
hue
1/h
Transition operating frequency, thermal parameter of the brake
S
hmax
1/h
Maximum permissible operating frequency, depending on the friction energy
per switching operation
s
L
mm
Air gap: the lift of the armature plate while the brake is switched
s
LN
mm
Rated air gap
s
Lmin
mm
Minimum air gap
s
Lmax
mm
Maximum air gap
s
HL
mm
Air gap for hand-release
t
1
ms
Engagement time, sum of the delay time and braking torque - rise time
t
1
= t
11
+ t
12
Summary of Contents for WSG-SF Series
Page 111: ......
