User Manual

Brushless Specific Commands
Advanced Digital Motor Controller User Manual 341
Example:
^SSF 1 150 : Set the sensorless start-up frequency of motor 1 at 15,0Hz.
SVT – BEMF Integrator Limit
HexCode: BE
Description:
This configuration parameter is applicable only for sensorless motor controllers. This
defines the limit to which the back-EMF of a given phase should be integrated to commu-
tate. It is representation of maximum flux linkage of the rotor. This number is filled after
the automatic motor tuning.
Syntax Serial: ^SVT cc nn
~SVT [cc]
Syntax Scripting: setconfig(_SVT, cc, nn)
Number of Arguments:
Argument 1: Channel
Min: 1 Max: Total Number of Motors
Argument 2: Integrator Limit
Type: Unsigned 32-bit
Min: 0 Default: 1000
Where:
cc = Motor channel
nn = Flux Linkage (miliWebber)
Example:
^SVT 1 1500 : Set the BEMF Integrator Limit motor 1 at 1,500 miliWebber.
SWD - Swap Windings
HexCode: A4
Description:
The concept of swap windings (can also be termed as sensor polarity) is a relative rela-
tionship between sensor direction and stator magnetic field rotational direction. During
calibration if angle, reported by the sensor, is changing in same direction as angle com-
manded to the stator then Swap Windings should be “None”, else “Swapped”.
In case of Hall + Encoder, two different Swap Windings are needed, one for hall and one
for encoder. So, instead we use 2 bits of same variable Bit 1 for Hall and Bit 0 for Encoder.
The following table shows the truth table for swap windings