Siemens SINAMICS PERFECT HARMONY GH180 Function Manual page 57

Disabled mode
This mode is the basic PMM control configuration. Since the flux is along the D-axis and I
are zero, the drive voltage is uncompensated and motor back EMF is unknown.
The figure below shows the vector diagram for disabled mode:
Figure 4-7
• I
• Drive output PF = 1
• Motor PF (rotor reference) is less than unity
• I
Auto mode
In this mode, the PF is controlled to produce the maximum torque per amp of the PMM motor
by ensuring the torque producing current is aligned to the motor Cemf. This is accomplished by
compensating for the voltage loss and phase delay caused by the total stator inductance,
parameter Stator Ls Total (1081). Total Stator inductance is defined as:
Total Stator Inductance = Leakage inductance + Magnetizing stator inductance
The figure below shows the vector diagram for auto mode:
Figure 4-8
NXGPro+ Control Manual
Operating Manual, A5E50491925A
Disabled Mode
= 0
ds,ref
compensation is off
ds
Auto Mode
NXGPro+ Control Description
4.7 Control Modes
and V
ds ds
55