Diagnostics Optimization CT MODBUS RTU Technical Data
E300 Design Guide
229
Issue Number: 1
The encoder can be aligned statically by connecting the motor to a DC power supply as shown.
The motor will move to one of a number of positions defined by the number of motor pole pairs (i.e. 3 positions for a six pole motor, etc.). The encoder
should be adjusted so that the U commutation signal is high, W is low and V is toggling in one of these positions.
Any other feedback device
The alignment required between the no-load motor voltages and the position feedback (i.e. Drive Encoder Position (J53) for the Drive position
feedback interface) with
Position Feedback Phase Angle
(
C13
) = 0.0 is shown in the diagram below for a 2 or 4 pole motor. For higher numbers of
poles the zero position should still be aligned as shown, but the one electrical cycle shown corresponds to 360° / (Number of poles / 2). It should be
noted that if the position feedback device is advanced (i.e. the zero position is moved to the right with respect to the voltages)
Position Feedback
Phase Angle
(
C13
) is increased from zero. If the position feedback is retarded
Position Feedback Phase Angle
(
C13
) changes to 359.9 and then
reduces towards zero.
Vu
Vv
Vw
Vuv
Vvw
Vwu
Position feedback phase angle alignment with commutation signals
Encoder commutation
signals
U
W
V
U
W
V
+
_
32768
54613
43691
10923
0
21845
32768
16384
27307
21845
5461
0
10923
16384
2 pole motor
Position feedback
phase angle
4 pole motor
Position feedback
phase angle
Vu
Vv
Vw
Vuv
Vvw
Vwu
Position feedback phase angle alignment
Содержание 03200106
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