Ac Brushless Motor Commutation Factor (Cycles/Rev) - Aerotech UNIDEX 500 Operation & Technical Manual

Parameters
0. Position Tracking
1. Advanced Motion
2. Basic Motions
3. Homing/Limits
4. Traps
5. Motor Feedback
6. Servo Loop
7. Other
8. Faults
General
Axis
x43
5-78
5.8.8.

AC Brushless Motor Commutation Factor (Cycles/Rev)

This parameter is used to configure the UNIDEX 500 for the number of electrical cycles
per motor revolution of the feedback device. The value of this parameter, in conjunction
with the value of axis parameter x44 (Encoder feedback [steps/rev/(* 4)]), are used to
generate the proper sinusoidal phase currents. This parameter should be set to one for
linear motors. Refer to Table 5-71.
Table 5-71. Sample Commutation Factors for AC Brushless Motors
Commutation Factor
1
2
3
4 (default)
Setting this value to 0 for an AC brushless motor with encoder feedback will result
in six step commutation.
This parameter has a range from 0 to 65,536 with a default value of 4.
commutation factors are shown above in Table 5-71.
Improper configuration will cause a "trap" when a move is commanded.
Aerotech, Inc.
UNIDEX 500 and Software
# of Poles Cycles per Revolution
2 pole
4 pole
6 pole
8 pole
1 cycle/rev
2 cycles/rev
3 cycles/rev
4 cycles/rev
Sample
Version 1.3