Siemens SINAMICS PERFECT HARMONY GH180 - Maintenance

• I
ds,ref
< 0
• Drive output PF < 1 based on the stator current vector
• Motor PF (rotor reference) < 1
• X
L
compensation is o󹪜 (motor inductance voltage drop not compensated)
Manual network mode
This mode is similar to manual mode but does not have all the protections of manual mode. I
ds,ref
is provided by the network as a percentage * 10 for scaling purposes.
• I
ds,ref
is entered via the network
• V
s
is aligned to the q-axis
• Drive Output PF < 0 based on the stator current vector
• Motor PF (rotor reference) < 1 (motor inductance voltage drop not compensated)
Refer to 󹪝gures 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
ds,ref
. The 󹪞ux produced in the
stator counteracts the constant 󹪞ux of the magnets, thereby maintaining the motor terminal
volts constant as the counter EMF goes up. PMMs have a 󹪝xed 󹪞ux and therefore a 󹪝xed V/Hz
ratio.
• Below base speed, the voltage regulator output is clamped at zero, so it adds no more 󹪞ux 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
ds
current starts
to move in a negative direction, producing a counter 󹪝eld in the stator inductance that
maintains the motor terminal voltage to the motor rated value.
9
UDWHG
)OX[YROWDJH
UHJXODWRU


9
7
ː3,/3)
,
GVUHI

,
GVUDWHG
Figure 4-11 Auto Phase Advance Voltage Regulator
The 󹪝gures below show the vector diagrams for auto phase advance mode below and above
base speed:
NXGPro+ Control Description
4.7 Control Modes
NXGPro+ Control Manual
Operating Manual, A5E50491925A 57