Control Structure In Flux Sensorless (Fc 302 Only); Control Structure In Flux With Motor Feedback - Danfoss VLT AutomationDrive FC 300 Design Manual

FC 300 Design Guide
reference handling system is received and fed through the ramp limitation and speed limitation
before being sent to the motor control. The output of the motor control is then limited by the
maximum frequency limit.
If par. 1-00 is set to "Speed closed loop [1]" the resulting reference will be passed from the ramp
limitation and speed limitation into a speed PID control. The Speed PID control parameters are
located in the par. group 7-0*. The resulting reference from the Speed PID control is sent to the
motor control limited by the frequency limit.
Select "Process [3]" in par. 1-00 to use the process PID control for closed loop control of e.g.
speed or pressure in the controlled application. The Process PID parameters are located in par.
group 7-2* and 7-3*.

3.2.5. Control Structure in Flux Sensorless (FC 302 only)

Control structure in Flux sensorless open loop and closed loop configurations.
In the shown configuration, par. 1-01
par. 1-00 is set to "Speed open loop [0]". The resulting reference from the reference handling
system is fed through the ramp and speed limitations as determined by the parameter settings
indicated.
An estimated speed feedback is generated to the Speed PID to control the output frequency.
The Speed PID must be set with its P,I, and D parameters (par. group 7-0*).
Select "Process [3]" in par. 1-00 to use the process PID control for closed loop control of i.e. speed
or pressure in the controlled application. The Process PID parameters are found in par. group 7-2*
and 7-3*.

3.2.6. Control Structure in Flux with Motor Feedback

Control structure in Flux with motor feedback configuration (only available in FC 302):
Motor Control Principle
MG.33.B9.02 - VLT ® is a registered Danfoss trademark
3. Introduction to FC 300
is set to "Flux sensorless [2]" and
3
23