Control Loop - Danfoss iC7 Motion Series Application Manual

Application Guide | iC7 Series Motion
Sensorless motor/speed/position control
Position
Speed
Controller Controller
Feedback source Feedback source
Motor/speed/position control with motor feedback
Position Speed
Controller
Controller
Feedback source Feedback source
Figure 4: Control Configuration in FVC+ Motor Control

Control Loop

2.12.1.3
Position control is always closed-loop control. It can be either sensorless, or with physical feedback using an encoder or resolver. In
sensorless mode, the motor rotor angle, estimated by the motor controller, is used as feedback for the position controller. The Encoder/
Resolver Option OC7M0 can be used to connect various encoder/resolver types as physical position feedback.
The position controller, in combination with speed feedforward, provides a speed reference for controlling the motor. Handling of the
speed reference depends on how the speed and motor control is configured. The following illustrations show examples of the control
structure and related parameters:
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Motor control
FVC+ sensorless
Motor control
FVC+ with
feedback
Sensorless motor/speed control, position control with feedback
Position Speed
Controller Controller
Feedback source Feedback source
Motor/speed control with motor feedback, position control with application feedback
Speed
Position
Controller Controller
Feedback source Feedback source
AB318753549016en-000301 / 136R0284
Motor control
FVC+ sensorless
Motor control
FVC+ with
feedback