Detailed operation by function groups
164
6.2.4.4 Detecting the initial pole position of a synchronous
motor
The following table explains the parameter setting for initial pole position
detection which is required for operating a synchronous motor. The result can be
viewed at DIS_08.
Code
Keypad display
Name
Range
Unit
Setting
PAR_43
DetAve Num
Number of detections for average
1–30
5
PAR_44
MagDet Volt
Pole position detection voltage
5–200
V
80
PAR_45
MagDet Curr
Pole position detection current
10–150
%
70
Preparation
If this is the first pole position detection, and if PAR_23 (Enc Type) is set to “A/B
Pulse,” follow the steps listed below.
Note
If PAR_23 (Enc Type) is set to “EnDat,” “Sin/Cos_All,” or “Sin/Cos_1387,” refer
to the instruction manual that is supplied with the Sin/Cos EnDat encoder add-
on module.
Set the speed reference to “0 (rpm)”.
Keep the brake in the held position during operation.
Check the initial angle detected on the keypad (DIS_08), and then stop the
operation.
Repeat step 3 for 5 times.
Initial pole position detection is successful if the difference of the angles
displayed at DIS_08 is less than 5 degrees. If the difference is more than 5
degrees, repeat the steps 1 through 5 after adjusting PAR_44 (Pole
detection voltage) and PAR_45 (Pole detection current).