Mannesmann Rexroth DDS 2.1 - Setting the Short-Time Operation Torque M

• DOK-DIAX02-DDS02.1*ANA-ANW1-EN-E1,44 • 12.96
89
7. Commissioning the functions of the digital AC servo drive
The short-time operation torque M
KB
is entered in the parameter "over-
load factor". Consult the selection data list Doc. No. 209.0069.4302-00
IDE for the value corresponding to the installed motor/controller combi-
nation.
If a value other than that given in the selection data list for the relevant
motor/controller combination is required, this can be changed in the
parameter "overload factor".
For the overload factor in the "OPERATING MODES, SCALING" menu
the following applies:
Overload factor
)
= x 100 [%]
M
KB
= Short-time operation torque [Nm]
M
dN
= Nominal torque [Nm]
1)
Settable range = 0 to 400 [%]
The short-time operating torque for intermittent operation can be se-
lected according to the "duty cycle" column of the selection data list (Doc.
No. 209-0069-4302-00) (load condition S6 to DIN 57530/VDE0530). The
maximum cycle time depends on the size of the motor and is indicated
in the operating characteristics of the relevant motor documentation. For
lower short-time torque levels, the duty cycle can be calculated as
follows:
ED = x 100 [%]
ED = duty cycle [%]
M
dN
= nominal torque [Nm]
M
KB
= short-time operation torque [Nm]
When in continuous operation, the AC servo motor can sustain the
nominal torque M
dN
as follows:
– up to 25% of n
max
(max. NC useful velocity)
– up to an ambient temperature of 45°C.
An overtemperature of 60 K will develop on the motor frame correspond-
ing to the thermal time constant. The nominal torque for higher speeds
can be found in the relevant motor documentation.
7.15. Setting the short-
time operation torque
"M
KB
"
M
KB
M
dN
Overload factor
( M
dN
)
2
( M
KB
)
2