13.1 General notes
STOBER synchronous servo motors are designed for connection to STOBER drive controllers in the standard
version. STOBER offers an extensive assortment of high-quality, trusted power and encoder connection ca-
bles for this purpose. However, STOBER synchronous servo motors can also be operated on drive controllers
from third-party manufacturers. Notes and information for this purpose can be found in the following chap-
ters. You can find all other information about STOBER synchronous servo motors in the corresponding chap-
ters of this catalog.
13.1.1 Nominal data
Nominal data for synchronous servo motors specified in the selection tables of this catalog were calculated
for connecting to STOBER drive controllers. Note that this nominal data may change when STOBER synchro-
nous servo motors are connected to drive controllers of third-party manufacturers. The following drive con-
troller plug connectors are determining factors here:
• f
2PU
• f
PWM,PU
• U
ZK
• Compensation of the field weakening range.
The maximum achievable speed of a synchronous servo motor depends on the number of pole pairs (p) of
the synchronous servo motor and, if applicable, on the restriction of f
2PU
by Regulation (EC) No. 428/2009
(EC Dual Use Regulation). Details are shown in the figure below.
Some encoders feature integrated temperature monitoring, the warning and switch-off thresholds of which
may overlap with the corresponding values set for the thermal winding protection in the drive controller. In
some cases, this may result in an instance where an encoder with internal temperature monitoring forces
the motor to shut down, even before the motor has reached its nominal data.
Fig.1: Speed/frequency graph for EZ motors
13.1 General notes 13 Connecting to drive controllers of third-party manufacturers
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