General information
Kendrion INTORQ | BA 14.0225 | 05/2022
8
Letter symbol Unit
Designation
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 op-
erating frequency
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 distributed
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
t
1
ms
Engagement time, sum of the delay time and braking torque:
rise time t
1
= t
11
+ t
12
t
2
ms
Disengagement time, time from switching the stator until reaching 0.1 M
dyn
t
3
ms
Slipping time, operation time of the brake (according to t
11
) until standstill
t
11
ms
Delay during engagement (time from switching off the supply voltage to the be-
ginning of the torque rise)
t
12
ms
Rise time of the braking torque, time from the start of torque rise until reaching
the braking torque
t
ue
s
Over-excitation period
U
V
Voltage
U
H
V DC
Holding voltage, after voltage change-over
U
L
V DC
Release voltage, before voltage change-over
U
N
V DC
Rated coil voltage; in the case of brakes requiring a voltage change-over,
U
N
equals U
L
