GE Industrial Solutions AF-650 GP General Purpose Drive - Manual (Page 11)

Horizontal or vertical
movement?
Low or high
inertia?
Low inertia
ramp down >15 sec.
Choose a 10% duty cycle brake resistor from the
table*
Horizontal
V
e
rtical
High inertia
ramp down <15 sec.
or don't know
Determine breaking
time of the application
Compare the braking time with the resistors
braking period
Braking time <
brake resistor period
Calculate duty
cycle ***
duty cycle < 10%
duty cycle > 40%
duty cycle ranging
from 10-40%
Choose a 10% duty cycle brake resistor from the
table*
Choose a 40% duty cycle brake resistor from the
table**
Please contact
GEC&I****
Please contact
GEC&I****
Braking time >
brake resistor period
Illustr
atio
n 4
.3: Brake
Re
si
sto
r Se
le
ctio
n
Fl
ow
Cha
rt
*) 40% (same as **)
**) See 10% tables in chapter Brake Resistor Overview.
***) See the chapter Calculation of the Brake Resistor.
****) Please provide the following info:
• Nominal power 100%
• Max. power during brake cycle
• Braking time / Duty cycle
• Supply voltage (max. DC)
• Resistance ( Ω-value)
• With or without thermswitch
• IP enclosure rating
AF-650 GP Brake Resistor Design Guide
10
4