REXROTH MKD025A-144, Manual, Page: 39 / 184

Synchronous Motors MKD General Notes on Technical Data
5-5
DOK-MOTOR*-MKD*******-PR07-EN-P Version7.0 19.05.2004
5.4 Sample Curve
Housing overtemperature
60 K
Insulated structure
Winding overtemperature
100 K
Non-insulated structure
Stahlplatte
M [Nm] M [Nm]
n [min-1]
1 2 3 4
n [min-1]
1 2 3 4
C
B
A
M
max
C
B
A
M
max
U
DC
[V] U
DC
[V]
thermal limiting
curves
voltage limiting
curves
theoretical maximum
torque
S6
25% ED
S1
surface cooled
S1
natural convection
thermal limiting
curves
voltage limiting
curves
S6
25% ED
S1
surface cooled
S1
natural convection
theoretical maximum
torque
M_n_KennlinieMKD_en.fh7
M
KB
M
dN
M
dN
M
KB
M
dN
M
dN
Speed-torque curve (example)
[A]-[C]: Thermal limit curves
[A]: M
dN
S1 continuous operation curve of the motor (according to EN
60034-1; 1998), natural convection
[B]: M
dN
S1 continuous operation curve of the motor (according to EN
60034-1; 1998), surface cooling
[C]: M
KB
S6 intermittent operation curve with a motor ON time of 25%
(according to EN 60034-1; 1998). The maximum cycle duration is 15
min.
[ M
max
]: Corresponds to the theoretically possible maximum torque of the motor.
The value can be limited by the drive controller.
[1]-[4]: Characteristic voltage limit curves. When a speed at the safe
commutation limit is reached, the voltage limit curve limits the available
maximum torque M
max
. The maximum motor speed is determined by the
DC link voltage used. There are separate characteristic curves for the
various drive controllers in connection with the power supply unit and
the supply voltage used.
[1]: HDS to HVR
[2]: HDS to HVE or DKCxx.3 with a power connection of 3 x AC 480 V
[3]: HDS to HVE or DKCxx.3 with a power connection of 3 x AC 440 V
[4]: HDS to HVE or DKCxx.3 with a power connection of 3 x AC 400 V
Fig. 5-4: Sample curves