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Technical data
Designation
Thermal time constant
Winding resistance at 20 °C
Winding inductance
Leakage capacitance
Number of pole pairs
Stator mass
Power dissipation
Coolant inlet temperature
Permissible coolant tempera‐
ture increase at P
V
Required coolant flow at P
V
Pressure drop at Q
min
Volume of coolant duct
Maximum permissible inlet
pressure
Designation
Moment of inertia of the rotor
Rotor mass
Maximum speed of rotor
Bosch Rexroth AG R911298798_Edition 08
Toler‐
Symbol
Unit
ance
T
min
th_nom
R
Ohm
12
L
mH
12
C
nF
dis
p
-
m
kg
stat
P
kW
V
T
°C
in
ΔT
K
max
Q
l/min
min
Δp
bar
V
l
cool
p
bar
max
General technical data for rotors MRT
Toler‐
Symbol
Unit
ance
J
± 10%
kgm
2
rot
m
kg
rot
n
min
-1
max_mech
MBT High Synchronous Torque Motors
Description
Duration of the temperature rise to 63% of the final temperature of the
winding at motor load with permissible S1 continuous torque. The thermal
time constant is determined by the cooling type used.
①: chronological profile of the winding temperature
Θmax: max. winding temperature
T
: Thermal time constant
th
Measured winding resistance among two strands.
Measured inductance between two strands.
Capacity of short-circuited power connections U, V, W against the motor
housing.
Quantity of pole pairs of the motor.
For stator mass depended from frame size and cooling mode refer to
Chapter 4.15
.
Power loss in operation mode S1 (continuous operation) at nominal veloc‐
ity v
.
N
Allowed coolant inlet temperature
The coolant inlet temperature should be maximum 5°C lower than the ex‐
isting ambient temperature T
. In case of a higher temperature differ‐
um
ence, danger of condensation!
Temperature difference between coolant inlet and outlet temperature dur‐
ing operation with liquid cooling (coolant water) and rated power loss P
Required coolant flow for compliance with the specified motor torque.
Pressure loss within the internal coolant circuit of the motor Q
Coolant volume of the motor.
Maximum permitted inlet pressure of the liquid cooling on the motor with
coolant water.
Description
Moment of inertia of the rotor without brake, bearing and motor encoder.
Mass of the components without attached parts (brake, encoder, etc.).
Mechanic maximum speed of the rotor.
.
V
.
min
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