max energy
248 W·s (J)
resistance
60
Ω
Power, continuous 20 W
Power, peak
2500 W
Time
100 ms
Copley Controls, 20 Dan Road, Canton, MA 02021, USA
P/N 16-01436 Rev 01
Page 25 of 28
RoHS
Xenus
PLUS
Compact
CANopen
XPC
Vac
E
100
62
120
58
200
34
240
17
Velocity
Bus
Vdc
HVdc
390
Off
Active
Regen
Resistor
Absorption
Decel time
Regen time
Velocity
Bus
Voltage
Regen
Active
Regen
Dwell Time
Regen
Cycle Time
regeneratIon
The drive has an internal regen resistor which can handle regenerative energy that exceeds the absorption capacity of the
internal bus capacitance. The internal regen resistor will be switched on when the energy shown in the table has been absorbed
and the bus voltage driven up to 390 Vdc at which point the internal regen resistor will be switched to absorb the kinetic energy
of the load.
abSorPTIon
InTernal reGen reSISTor
CalCulaTInG THe reGen rePeTITIon frequenCy
Step 2: Subtract the absorption at your mains voltage to get the energy that must
be dissipated in the regen resistor. use 240 Vac:
75J - 17J = 58 J
Step 3: divide the regen energy by the continuous power rating of 20 Watts
to get the dwell time that can dissipate the regen energy in the resistor:
dwell Time = 58 Joules = 2.9 sec
20 Watts
Seconds; Joules, Watts
Step 4: find the total regen cycle time by adding the deceleration time
to the dwell time:
decel Time = 1.25 sec
dwell Time = 2.90 sec
Cycle Time = 4.15 sec
Step 1: find the energy of motion for a rotating load, for this example let it be
75 Joules:
E
=
J
* rPm
2
= 75 J
182
Joules; kg·m
2
, RPM
Joules; Joules
absorption is the energy that can be transferred to the
940 uf internal capacitance during deceleration. This table
shows the energy absorption in W·s for a drive operating
at some typical mains voltages. If the deceleration energy
is less than the absorption capacity of the drive, then the
regeneration resistor will not be switched-on because the
bus voltage will not rise enough to hit the over-voltage
level that would disable the PWm outputs.
Terms:
E
energy
Joules, Watt·seconds
J
rotary moment of Inertia kg·m
2
P
Power
Watts