Stober PK - Page 452

Symbol Unit Explanation
M
2eff*
Nm Actual effective torque on the gear unit output
M
2eq*
Nm Equivalent torque present on the gear unit output
M
2k*
Nm Actual tilting torque on the gear unit output
M
2k100
Nm Permitted tilting torque on the gear unit output for n
2m*
≤ 100 rpm
M
2k20
Nm Permitted tilting torque on the gear unit output for n
2m*
≤ 20 rpm
M
2k,acc
Nm Permitted acceleration tilting torque at the gear unit output
M
2k,acc*
Nm Acceleration tilting torque present at the gear unit output
M
2k,acc,1*
Nm Acceleration tilting torque present at the gear unit output in the first time pe-
riod
M
2k,acc,n*
Nm Acceleration tilting torque present at the gear unit output in the nth time pe-
riod
M
2k,eq*
Nm Actual equivalent tilting torque on the gear unit output
M
2kN
Nm Permitted nominal tilting torque at the gear unit output
M
2max
Nm Maximum torque at the gear unit output
M
2N
Nm Nominal torque on the gear unit output (relative to n
1N
)
M
2NOT
Nm Gear unit emergency-off torque on the gear unit output for max. 1000 load
changes
Without consideration of the maximum torque of the motor
M
2NOT*
Nm Actual emergency off torque for the gear unit on the gear unit output
M
2th
Nm Thermal limit torque on the gear unit output
M
Bdyn
Nm Dynamic braking torque at 100°C
M
Bstat
Nm Static braking torque of the motor brake at 100°C
m
dyn
kg Weight of a motor in dynamic operation
M
eff*
Nm Actual effective torque of the motor
m
F
kg Weight of the forced ventilation unit
M
k
Nm Permitted tilting torque on the output
M
k*
Nm Actual tilting torque on the output
M
k,1*
– M
k,n*
Nm Actual tilting torque of the motor in the respective time segment
M
k,eq*
Nm Actual equivalent tilting torque at the output
M
k100
Nm Permitted tilting torque on the output for n
m*
≤ 100rpm
M
k300
Nm Permitted tilting torque on the output for n
m*
≤ 300 rpm
M
L
Nm Load torque
M
L*
Nm Actual load torque
M
lim
Nm Torque limit without compensating for field weakening
M
limF
Nm Torque curve of the motor with forced ventilation in continuous operation
M
limFW
Nm Torque limit with compensation for field weakening (applies to operation on
STOBER drive controllers only)
M
limK
Nm Torque curve of the motor with convection cooling in continuous operation
M
max
Nm Maximum torque: the maximum permitted torque the motor is able to de-
liver over a short period (when accelerating or decelerating) (tolerance ±10%)
M
max*
Nm Actual maximum torque
m
n
mm Module
M
n*
Nm Actual torque of the motor in the n-th time segment
M
N
Nm Nominal torque: the maximum torque of a motor in S1 mode at nominal
speed n
N
(tolerance ±5%)
You can calculate other torque values as follows: M
N*
= K
M0
⋅ I* – M
R
.
M
Nred
Nm Reduced nominal torque of the motor
M
op
Nm Torque of motor at the operating point from the motor characteristic curve
at n
1m*
M
R
Nm Frictional torque (of the bearings and seals) of a motor at winding tempera-
ture Δϑ = 100 K
n rpm Speed
|n| rpm Absolute value of speed
n
1limF
rpm Intersection of torque curve M
lim
and torque curve with forced ventilation
M
limF
n
1limK
rpm Intersection of torque curve M
lim
and torque curve with convection cooling
M
limK
n
1m*
rpm Actual average input speed
15.1 Symbols in formulas 15 Appendix
452