Stober PK - Page 453

Symbol Unit Explanation
n
1max
rpm Maximum permitted input speed
n
1max*
rpm Actual maximum input speed
n
1maxDB
min
-1
Maximum permitted input speed of the gear unit in continuous operation
(at surrounding temperature of 20 °C)
n
1maxDBEL1,2
rpm Maximum permitted input speed of the gear unit in continuous operation
Mounting positions EL1, EL2
(at surrounding temperature of 20 °C)
n
1maxDBEL1,2,3,4
rpm Maximum permitted input speed of the gear unit in continuous operation
Mounting positions EL1, EL2, EL3, EL4
(at surrounding temperature of 20 °C)
n
1maxDBEL1,2,5,6
rpm Maximum permitted input speed of the gear unit in continuous operation
Mounting positions EL1, EL2, EL5, EL6
(at surrounding temperature of 20 °C)
n
1maxDBEL3,4
rpm Maximum permitted input speed of the gear unit in continuous operation
Mounting positions EL3, EL4
(at surrounding temperature of 20 °C)
n
1maxDBEL3,4,5,6
rpm Maximum permitted input speed of the gear unit in continuous operation
Mounting positions EL3, EL4, EL5, EL6
(at surrounding temperature of 20 °C)
n
1maxDBEL5,6
rpm Maximum permitted input speed of the gear unit in continuous operation
Mounting positions EL5, EL6
(at surrounding temperature of 20 °C)
n
1maxZB
min
-1
Maximum permitted input speed of the gear unit in cyclic operation
(at surrounding temperature of 20 °C)
n
1N
rpm Nominal speed at the gear unit input
n
2
rpm Speed at the gear unit output
|n
2
| rpm Absolute value of output speed
n
2m*
rpm Actual average output speed
n
2m,1*
– n
2m,4*
rpm Actual average output speed in the respective time segment (1 to 4)
n
2m,n*
rpm Actual average output speed in the n-th time segment
n
2N
min
-1
Nominal speed at the gear unit output
N
Bstop
– Permitted number of braking processes from full speed (n = 3000rpm) with
J
Bstop
(M
L
= 0). The following applies if the values of n and J
Bstop
differ: N
Bstop
=
W
B,Rlim
/ W
B,R/B
.
n
m*
rpm Actual average motor speed
n
m,1*
– n
m,4*
rpm Actual average speed of the motor in the respective time segment (1 to 4)
n
m,n*
rpm Actual average speed of the motor in the n-th time segment
n
mot
rpm Speed of the motor
n
N
rpm Nominal speed: The speed for which the nominal torque M
N
is specified
p – Number of pole pairs
P
holdB
W Holding capacity of the brake
P
N
kW Nominal power: the power the motor is able to deliver long term in S1 mode
at the nominal point (tolerance ±5 %)
P
N,B
W Nominal power of the brake
P
N,F
W Nominal output of the forced ventilation unit
P
O,B
W Overexcitation output of the brake
P
st
mm Pitch of the screw drive
R
U-V
Ω Winding resistance of a motor between two phases at a winding temperature
of 20 °C
q
vF
m³/h Delivery capacity of the forced ventilation unit in open air
S – Service factor: Quotient of the nominal torque from the gear unit and the
motor without consideration for thermal limiting performance. Represents a
value for the reserve of the geared motor.
t s Time
t
1*
– t
4*
s Duration of the respective time segment (1 to 4)
t
1B
ms Linking time: time from when the current is turned off until the nominal brak-
ing torque is reached
15 Appendix 15.1 Symbols in formulas
453