Technical data

Rexroth IndraDyn H Technical Data 4-3
DOK-MOTOR*-MBS-H******-PR02-EN-P
Operating characteristic
The following sample characteristic curves explain the operating
behavior of IndraDyn H motors, as does information found in the motor
data sheet.
M [Nm]
n [min
-1
]
M
max
M
N
M
max
n
N
n
max
MBS_Definitions3.EPS
[1]: Rated torque M
nenn
[2]: Rated speed n
nenn
[3]: Maximum torque M
max
[4]: Max. speed with max. torque n
Mmax
[5]: Max. speed n
max
Fig. 4-4: Example motor characteristic curve
Note: The attainable motor torque depends on the drive device
used: it is available for IndraDyn H motors only if the drive
controller is able to set the input control angle optimally. This
is the case for all IndraDrive devices of Bosch Rexroth.
If the drive controller is not able to do this, the reluctance
torque cannot be used, and 10-15% less rated torque will be
available.
The maximum torque M
max
is available up to the speed n
Mmax
. When the
velocity rises, the available DC bus voltage is reduced by the velocity-
dependent back-EMF (electromotive force) of the motor. This leads to a
reduction of the maximum torque with rising velocity.
The specified characteristic curves can be linearly extrapolated to the
existing voltages if the connection voltages or mains voltages are
different.
Example:
() nenn
neu,DC
neu,U
n
V540
U
n
DC
⋅=
Fig. 4-5: Example for conversion
nenn
V750
nennmax
V750
max
nenn
V750
nennmax
V750
max
n
V540
V750
nn
V540
V750
n
ttanconsMMttanconsMM
⋅=⋅=
====
Fig. 4-6: Conversion-example to DC bus voltage 750V
DC
Conversion to DC bus voltage
750V
DC