Vector control 4.4 Speed controller adaptation

Note

In comparison with speed control with an encoder, the dynamic response of drives without an encoder is significantly reduced. The actual speed is derived by means of a model calculation from the converter output variables for current and voltage that have a corresponding interference level. To this end, the actual speed must be adjusted by means of filter algorithms in the software.

Function diagrams (see SINAMICS S List Manual)

● 6040 Speed controller with/without encoder

Overview of key parameters (see SINAMICS S List Manual)

p0340[0...n] Automatic calculation of control parameters

p1442[0...n] Speed actual value smoothing time

p1452[0...n] Speed actual value smoothing time (SLVC)

p1460[0...n] Speed controller P gain lower adaptation speed

p1462[0...n] Speed controller integral time lower adaptation speed

p1470[0...n] Speed controller sensorless operation P gain

p1472[0...n] Speed controller sensorless operation integral time

p1960 Speed controller optimization selection

r0062 CO: Speed setpoint after the filter

r0063[0...1] CO: Speed actual value

r0345[0...n] Nominal motor starting time

r1482 CO: Speed controller I torque output

r1508 CO: Torque setpoint before supplementary torque

4.4Speed controller adaptation

Description

Two adaptation methods are available, namely free Kp_n adaptation and speed-dependent Kp_n/Tn_n adaptation.

Free Kp_n adaptation can also also be activated in "operation without encoder" mode and is used in "operation with encoder" mode as an additional factor for speed-dependent Kp_n adaptation.

The speed-dependent Kp_n/Tn_n-adaptation is only active during "operation with encoder".

Drive Functions

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Function Manual, (FH1), 07/2007 Edition, 6SL3097-2AB00-0BP4

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Image 121
Efficient Networks S120 manual Function diagrams see Sinamics S List Manual, Vector control 4.4 Speed controller adaptation