Parker Hannifin S.p.A S.B.C. Division
SLVDN User’s Manual
Page 59 of 181
9.8.1.
Motor phases
In this paragraph is showed a procedure not necessary for the motors of the S.B.C. Division,
essential for the motor connection, because allows to find the motor phases (A=U, B=V,
C=W).
The procedures shown in this document are dangerous for the
operator and could damage the motor under test. A qualified and
trained personnel with advanced skills in electronics and drive
technology is therefore needed, the operator must be sure that these
procedures are proceeding in safety condition.
Necessary instruments:
power supply 24Vdc with output current equal or higher to the rated current of the
motor under test. Verify that the phase-phase resistance of the motor limits the current
at the rated value with 24V voltage applied.
Necessary requisites:
motor free without load and inertia applied.
Procedure:
connect the positive pin of the 24Vdc supply voltage at one motor phase (assign name
A at this phase). Connect the negative pin at one of the other phases (at random).
Feeding the circuit, the rotor will turn and to assume a new position. Observing the
motor shaft, move the negative pin of the 24Vdc voltage on the other phase: if the rotor
turns counter-clockwise (watching frontally the drive shaft), the phase connected to the
negative pin is the phase C, otherwise if the rotor turns clockwise this phase connected
to the negative pin is the phase B (*).
Result:
after to have connected the motor and the device of feedback to the drive, the counter of
the feedback increases if the motor turns clockwise, and decrease if turns counter-
clockwise sense.
(*) To avoid to damage the motor winding, to power the circuit only for the necessary time.
