Determining The Motor Phases; Table 9: Motor Phase Determination - Quin Q-drive Installation & User Manual

Q-Drive Installation Manual
8.4

Determining the motor phases

This operation must only be done when the three-phase motor order is unknown (motor
prototype or no documentation).
It is necessary to have a DC supply of about 3A. and of sufficient voltage to move the
motor but not in excess of the motor rated voltage.
The procedure is as follows:
1 Define arbitrarily the Phase U as one of the 3 motor phases.
2 Connect U to "+" and a 2nd phase motor to "-" of the DC supply.
3 Switch supply on. The shaft will move to a stable position.
4 Mark the new shaft position with a pencil, at top dead centre.
Disconnect the "-" of the supply from the 2nd phase of the motor and
5
6 connect the "-" to the 3rd phase motor. Observe the axis rotation direction.
7 Mark with a pencil the new shaft axis position.
With the help of the table below, determine the 2 unknown motor phases.
sense of axis rotation
clockwise
anti-clockwise
Page 50
2nd phase
V
W

Table 9: Motor Phase Determination

3rd phase
W
V
Copyright © 1996 Quin Systems Ltd.
Issue 1.5