Rockwell Automation 1398-DDM-xxx USE MNL/ULTRA 200 DIG.SERVO.DR - Manual (Page 278)

Publication 1398-5.0 – October 1998
D-14 Creating Custom Motor Files
Example of Custom Motor
File Creation
The following is an example of a custom motor. A 50:1 gear is
included inside this motor. The example illustrates how to configure a
custom motor.
Manufacturer’s Data
The following specifications were taken from the manufacturer’s data
sheet:
●
Reduction Ratio = 1:50
●
Rated Current = 1.4 Amp
●
Maximum Current = 3.8 Amp
●
Maximum Speed = 80 RPM
●
Torque Constant = 270 in-lb/Amp
●
BEMF = 1.1 Volt/RPM per phase
●
Motor Resistance = 3.7
Ω
per phase
●
Motor Inductance = 5.0mH per phase
●
Thermal Time Constant = 30 minutes
●
Moment of Inertia = 5.1 in-lb-sec
2
●
Encoder Linecount = 1500 lines/rev
●
No Integral Thermostat
A check with the manufacturer yielded that the motor has 8 poles, and
that the line-to-line back-EMF and Hall signals are as shown in
Figure D.7, below. The figure indicates that no lead swapping is
necessary but the Hall offset is 120
o
.
Figure D.7 Back-EMF and Hall Signals, Clockwise Rotation
Intro