Siemens SINAMICS PERFECT HARMONY GH180, Function Manual

Page: 183 / 538

7.3 Signal Polarities
Table 7-1 Signal polarities
Signals Quadrant I Quadrant II Quadrant III Quadrant IV
Rotation speed (ω
r
) + + - -
Electrical frequency (ω
s
) + + - -
Slip (ω
slip
) + - - +
Torque + - - +
Current (I
q
) + - - +
Voltage (V
qs
) + - - +
Acceleration + - - +
Injection Frequency (ω
inj
) 0 - 0 +
Power (flow) + - + -
Mag Current (I
d
) + + + +
Voltage (V
ds
) + + + +
Note
Signal polarity for the electrical frequency (ω
s
)
The electrical polarity is uncertain for the electrical frequency (ω
s
) in the braking quadrants (II
and IV), where the slip opposes the rotational speed, when the speed magnitude approaches the
slip magnitude. The sign will match that of the slip rather than the sign of the rotor speed, when
the slip magnitude is greater than the rotor speed. This is due to the relationship between slip
and torque.
Operating the Control
7.3 Signal Polarities
Control Manual
Operating Manual, A5E50491925A
181