Rockwell Automation 1336T Master/Slave Parallel AC Drv - Manual (Page 9)

1336 FORCE-5.19 – August, 2000
Introduction 1-5
Motor Configuration:
A custom dual-winding three-phase induction motor is used with the
Master/Slave drives. This motor is designed for 0 degrees of phase
shift between each of the stator windings (i.e. matched, isolated motor
windings in the same slots.). This creates two sets of motor stator
windings with a common rotor circuit.
Figure 1.4
d-q Motor Model
The effective motor neutral is the same for each stator winding (if
wye connected) but the neutrals remain isolated from each other as
well as ground.
Figure 1.5
Motor Phasor Diagram
Encoder feedback from the motor is connected to the Master drive.
Encoder signals are then daisy chained to the Slave drive (note: only
the Master drive power supply is used). The encoder signal TE
ground is terminated at the Master Only. Both drives are set up with
encoder faults enabled, so that any encoder loss will create a drive
fault in both Master and Slave drives (only for encoder operation).