crosses back over to quadrant I, and assumes a positive value as the motor accelerates in this
direction. The signs of the signals of the applied torque and resultant speed are illustrated in the
gure above.
The injection frequency must always be opposing the direction of rotation and is only used in the
case of braking or negative energy ow. Therefore, it is zero in the motoring quadrants, I and III,
and is the inverse polarity of the electrical frequency in the braking quadrants, II and IV. See Table
Signal Polarities.
Operating the Control
7.2 Frame of Reference
NXGPro+ Control Manual
180 Operating Manual, A5E50491925A
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