Lenze 520 Series - Page 55

4Q - DC Chopper 520 series
53
Example: Using the quick stop function, rhe drive is decelerated with the current
‚max~ i.e. with constant torque. Ihis results in a linear decrease of the
speed and therefore the brake power. Ihe braking ‚nme (tBR) results frorn
the brake torque the kinetic energy to be braked.
The required rated power <~N~
of the brake resistors results from:
Bremsen
Tr@i b en
Ihe maximum brake power results
from:
t
required rated power of the brake resistor
maximum motor voltage in the generator mode
maximum motor current in the generator mode
brake time
time between twa brake cycles
maximum brake power during a brake phase
maximal kinetic energy to be dissipated in heat during braking
motor efficiency
PN:
UGen max
‚Gen max
tBR:
tZYk:
Pmax:
Wk~fl:
Mot:
Lenze