Siemens SINAMICS PERFECT HARMONY GH180, Function Manual

Page: 180 / 538

7.2 Frame of Reference
Assignment of motor control signals
The control signals controlling the motor are assigned a polarity for use over four quadrants of
control to maintain consistency of the algorithms.
This section clarifies what the control signals are and what their polarities mean in the various
quadrants.
Frame of reference
The four quadrant frame of reference is defined as the four quadrants of operation of a motor.
They are divided left to right by the direction of rotation and from top to bottom by the polarity
of the torque in the machine. Energy flow from the drive into the machine is called motoring.
Energy flow out of the machine and into the drive is called regeneration or braking.
Quadrants I and II represent the forward motoring and braking quadrants, respectively.
Quadrants III and IV represent the reverse motoring and braking quadrants, respectively. Top and
bottom of the diagram represent the positive and negative directions of the applied torque
respectively.
Operating the Control
7.2 Frame of Reference
Control Manual
178
Operating Manual, A5E50491925A