Regenerative brake sizing – Rockwell Automation 1336R REGEN LINE REG User Manual
Page 57
Regenerative Brake Operation
3–5
Regenerative Brake
Sizing
6. Determine the required percent of braking torque (
TQ%
).
TQ% =
TQ
B
×
100
——————
TQ
M
Where
TQ
B
=
The Required Braking Torque
TQ
M
=
The Rated Motor Torque
7. Determine the peak braking horsepower (
HP
2
).
HP
2
=
TQ
B
×
N
1
——————
5250
Where
TQ
B
=
The Required Braking Torque
N
1
=
The Maximum Motor Speed
8. Calculate the peak AC line current (
I
1
).
The AC line current of the 1336 REGEN Package will be at its
maximum value at the beginning of the deceleration period.
I
1
=
HP
1
×
746
———————
V
L-L
× √
3
Where
HP
1
=
The Peak Braking HP
V
L-L
=
The Line-to-Line Utility Voltage
If your application requires continuous regeneration, (
I
1
) must be
less than the rated current of the 1336 REGEN Package. Pick a
1336 REGEN Package that has an AC line current rating greater
than or equal to (
I
1
) at the appropriate AC line voltage.
If your application does not require continuous regeneration,
continue on to Step 9.
See page 3-8 for information on paralleling regenerative brakes.
9. The 1336 REGEN Package has a peak overload current rating
(
I
OL
) of 150% of its data nameplate rating.
I
OL
=
I
RATED
×
1.5
Where
I
RATED
=
The nameplate current of the 1336 REGEN
Package