Star-Delta Or Motor Changeover; Pole Position Identification - Siemens SINAMICS S120 System Manual

Configuring
11.1 Features
Take into account the series inductance, if L_motor < 2 • p0233, so that
L_motor + p 0353 ≥ 2 • p0233.
Is the output frequency < 1200 Hz?
YES Is the calculated maximum motor speed (in accordance with the formula with the filter of the HF Drive without VPM)
less than the required maximum speed?
YES Is the motor a short-circuit proof synchronous motor?
YES
NO
NO Operate the HF drive mit 16 kHz.
NO Is the calculated maximum speed of the motor (in accordance with the formula with the filter of the HF Drive at 32
kHz with VPM) less than the required maximum speed?
YES Is the motor a short-circuit proof synchronous motor?
YES
NO
NO Operate the HF drive mit 32 kHz.
11.1.2

Star-delta or motor changeover

In principle, motors that can be changed over from a star-delta connection or motors with motor
data set changeover can be operated on a High Frequency drive.
For the parameterization it is imperative that the motor leakage inductance/armature
inductance must, for all connected motors, be either > 3.6 • p0233 or < 3.6 • p0233.
If this condition is not met, no star-delta changeover can be executed because the additional
capacitance in the HF Sine Filter Module cannot be changed over depending on the data set.
11.1.3

Pole position identification

Synchronous motors
For synchronous motors, which are operated with pole position identification, the HF Sine Filter
Module does not support the saturation-based technique (p1980 < 10).
160
Is the calculated maximum speed of the motor (in accordance with the formula with VPM) less
than the required maximum speed?
YES Use the HF Drive with VPM and the series inductance, which satisfies this formula.
NO Use the HF Drive with VPM.
Is the calculated maximum speed of the motor (according to the formula with filter of the HF Drive
32 kHz without VPM) less than the required maximum speed, or is the module current too low?
YES The motor can only be operated up to the calculated speed as a maximum. Current and
maximum speed must be weighed up against one other (HF Drive with 16 kHz <-> HF
Drive with 32 kHz)
NO Operate the HF drive mit 32 kHz.
Is the calculated maximum speed of the motor (in accordance with the formula with the filter of
the HF Drive at 32 kHz with VPM) less than the required maximum speed?
YES Operate the HF drive with 32 kHz and VPM - as well as the series inductance, which
satisfies this formula.
NO Operate the HF drive mit 32 kHz.
With the HF drive, the motor can only be operated up to the calculated (maximum) speed at 32 kHz.
High Frequency Drive
System Manual, 10/2020, 6SL3097-5AH10-0BP0