Example Characteristic Curves - Bosch Rexroth MAD Project Planning Manual

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Technical data
Maximum allowed coolant input
pressure
4.2.2

Example characteristic curves

(1) Key speed
Bosch Rexroth AG R911295781_Edition 11
See chapter 8.9.3 "Coolant input pressure " on page
P Mechanical output power in kilowatt [kW]
M Torque available at the output shaft in newton meter [Nm]
n
Motor speed in revolutions per minute [min
① Key speed (n
② Rated speed (n
③ Maximum speed (n
④ Characteristic curve without derating
⑤ Characteristic curve with derating
Fig. 4-6: Example characteristic curves
The achievable motor torque depends on the drive controller
used. The reference value for the motor characteristic curves is
an unregulated DC bus voltage of 540 V
Explanation:
Start of a drop in torque and power before the rated speed n
This behavior is called De-rating and occurs only with some versions of motor
windings. If there is no derating behavior, the key speed is equal to the rated
speed.
Until the key speed is reached, continuous current at standstill I
fective value). If there is no derating behavior, the continuous current at
standstill is equal to the rated current I
Before the key speed is reached, the continuous torque at standstill M
available for S1 operation mode. If there is no derating behavior, the continu‐
ous torque at standstill is equal to the rated torque M
MAD / MAF Asynchronous Housing Motors
in data sheet)
1
)
N
)
max
DC
.
N
N
188.
-1 ]
.
is reached.
N
applies (ef‐
1
is
1
.