Bosch rexroth MBT, Manual

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4.8 Frame size 251
4.8.1 Data sheet MST251
Designation Symbol Unit MST251F-0040-F
Standstill torque
M
0
Nm 635
Standstill current
I
0
A 66.9
Rated torque M
N
Nm 546.0
Rated power P
N
kW 22.90
Rated current
I
N
A 59.0
Rated speed
n
N
min -1 400
Maximum torque
M
max
Nm 1250
Maximum current
I
max
A 177.0
Max. speed (electrical)
n
max
min -1
700
Power wire cross-section A
mm 2
16.0
Torque constant at 20 °C
K
M_N
Nm/A 9.26
Voltage constant at 20 °C
K
EMK_1
V/min -1
0.670
Thermal time constant
T
th_nom
min 4.0
Winding resistance at 20 °C
R
12
Ohm 0.63
Winding inductivity L
12
mH 8.9
Leakage capacitance of the com‐
ponent
C
ab
nF 24.4
Number of pole pairs p - 15
Details about liquid cooling
Power dissipation
P
V
kW 6.62
Coolant inlet temperature T
in
°C 10 ... 40
Permissible coolant temperature
increase for P
V
ΔT
max
K 10
Required coolant flow at P
V
Q
min
l/min 9.5
Pressure drop at Q
min
Δp bar 1.0
Volume of coolant duct
V
cool
l 0.48
Maximum allowed inlet pressure p
max
bar 6.0
Latest amendment: 2020-01-07
Tab. 4-13: MST251 - Technical data
MBT High Synchronous Torque Motors 51/409
Technical data
R911298798_Edition 08 Bosch Rexroth AG