BECKHOFF AL2000 Linear servomotor - Manual (Page 60)

Technical data
11.6 Calculation of the brake resistor
During the braking procedure of the linear axis, energy is fed back into the servo drive. During the design the
regenerative power must be calculated in order to select a brake resistor if necessary.
To do this the peak and continuous power must be calculated.
P
max
= 0.9 * (m * V²) / (2 t
b
)
P
rated
= P
max
* t
b
/ t
z
P
max
= maximum power of the brake resistor in Watts (W)
P
rated
= continuous power of the brake resistor in Watts (W)
M = moved mass (carriage + load) in kg
V = carriage velocity in m/s
t
b
= braking time in seconds
t
z
= cycle time in seconds
Linear servomotor AL2xxx 60 Version 4.0