Rockwell Automation 1336R REGEN LINE REG - 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