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3.2.5 Control Structure in Flux Sensorless (FC 302 only)
Control structure in Flux sensorless open loop and closed loop configurations.
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130BA053.11
Ref.
Config. mode
P 1-00
P 7-20 Process feedback
1 source
P 7-22 Process feedback
2 source
Process
PID
P 4-11 Motor speed
low limit [RPM]
P 4-12 Motor speed
low limit [Hz]
P 4-14 Motor speed
high limit [Hz]
P 4-13 Motor speed
high limit [RPM]
Low
High
Ramp
P 3-**
+f max.
P 4-19
Max. output
freq.
Motor
controller
-f max.
Speed
PID
P 7-0*
In the shown configuration, 1-01 Motor Control Principle is set to “Flux sensorless [2]” and 1-00 Configuration Mode 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 (parameter group 7-0*).
Select “Process [3]” in 1-00 Configuration Mode 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 parameter group 7-2* and 7-3*.
Introduction to FC 300 FC 300 Design Guide
20 MG.33.BD.02 - VLT
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