Siemens SINAMICS PERFECT HARMONY GH180 Function Manual page 59

• I
• Drive output PF < 1 based on the stator current vector
• Motor PF (rotor reference) < 1
• X
Manual network mode
This mode is similar to manual mode but does not have all the protections of manual mode. I
is provided by the network as a percentage * 10 for scaling purposes.
• I
• V
• Drive Output PF < 0 based on the stator current vector
• Motor PF (rotor reference) < 1 (motor inductance voltage drop not compensated)
Refer to figures in Manual Mode Section for vector diagrams associated with this mode.
Both manual and manual network mode can be used to test PMMs that require a full current test
where no torque load is available.
Auto phase advance mode
Auto phase advance mode is similar to auto mode in that it works below the base speed of the
motor, to obtain maximum torque per amp, by compensating for the voltage loss and phase shift
due to the stator inductance. Above base speed, a voltage regulator is enabled to maintain the
voltage of the PMM at the base rating, by producing negative I
stator counteracts the constant flux of the magnets, thereby maintaining the motor terminal
volts constant as the counter EMF goes up. PMMs have a fixed flux and therefore a fixed V/Hz
ratio.
• Below base speed, the voltage regulator output is clamped at zero, so it adds no more flux to
the machine. The reference for the voltage is rated motor voltage.
• Above base speed, the voltage regulator comes out of the clamp limits, and I
to move in a negative direction, producing a counter field in the stator inductance that
maintains the motor terminal voltage to the motor rated value.
Figure 4-11
The figures below show the vector diagrams for auto phase advance mode below and above
base speed:
NXGPro+ Control Manual
Operating Manual, A5E50491925A
< 0
ds,ref
compensation is off (motor inductance voltage drop not compensated)
L
is entered via the network
ds,ref
is aligned to the q-axis
s
Auto Phase Advance Voltage Regulator
NXGPro+ Control Description
4.7 Control Modes
. The flux produced in the
ds,ref
current starts
ds
ds,ref
57