Allen-Bradley PowerFlex User Manual

2-4
Step 2 Total Inertia
J
T
= Total inertia reflected to the motor shaft (kg-m
2
or lb.-ft.
2
)
J
m
= Motor inertia (kg-m
2
or lb.-ft.
2
)
GR = Gear ratio for any gear between motor and load
(dimensionless)
J
L
= Load inertia (kg-m
2
or lb.-ft.
2
)
1.0 lb.-ft.
2
= 0.04214011 kg-m
2
Calculate Total Inertia:
Record Total Inertia:
Determine Values of Equation Variables
J
T
=
J
T
J
m
GR
2
J
L
×()+=
J
T
oooooooooo[]oooooooooo oooooooooo×()+=

Allen-Bradley PowerFlex Specifications

General

Category	DC Drives
Manufacturer	Allen-Bradley
Series	PowerFlex
Communication Options	EtherNet/IP, DeviceNet, ControlNet
Protection Features	Overcurrent, Overvoltage, Undervoltage, Overtemperature, Short Circuit
Enclosure Type	NEMA 1, NEMA 12, NEMA 4/4X
Operating Temperature	0°C to 40°C (32°F to 104°F)
Storage Temperature	-40°C to 70°C (-40°F to 158°F)
Humidity	5% to 95% (non-condensing)
Altitude	Up to 1000m (3280 ft) without derating