Slot Ripple And Accuracy - Siemens SIMOTICS T-1FW3 Configuration Manual

n
Speed limits
max Inv
The maximum permissible speed is limited by the mechanical speed limit
(centrifugal forces at the rotor, bearing service life) or the electrical limit speed
NOTICE
Converter destroyed due to overvoltage
When the machine is operational (when motoring or separately driven) at speeds higher
than
permissible converter voltage. This can cause irreparable damage to the converter.
• Operation is not permissible above the speed
Converter type
SINAMICS S120, 3AC 380-480 V
The following formula can be used to determine the maximum permissible speed
to which the system can be operated without restrictions.
n
max Inv
U
Perm Inv
k
in V/1000 rpm,
E
(Page 162)").
The SINAMICS S120 drive system calculates this value automatically.
When the converter is functioning properly, the voltage that occurs at the motor terminals in
field-weakening mode can be limited by generating a voltage in phase opposition to the
induced voltage.
6.2

Slot ripple and accuracy

The values in the table "slot ripple and accuracy" apply under the following conditions:
● Synchronous motor on SINAMICS S with servo control
● Type of construction: booksize or chassis
● Default setting: Pulse frequency 4 kHz or 2 kHz
● Torque control
1FW3 complete torque motors
Configuration Manual, 08/2020, A5E46027705B AA
n
, a voltage can be induced in the winding that exceeds the maximum
max Inv
other additional measures. Siemens AG accepts no liability for any damage occurring as
a result of failing to observe the danger warning.
in rpm
in V
k
= voltage constant (see Chapter "Data sheets and characteristics
E
Technical data and characteristics
n
without protective measures or
max Inv
Max. permissible voltage at the converter
820 V
6.2 Slot ripple and accuracy
n
max mech
n
.
max Inv
U
Perm Inv
n
max Inv
up
161