Danaher Motion
05/2008
Appendix A – DC Power Supply Design
S200-VTS Product Manual
113
Diode
Rectifier
16
AWG
16
AWG
Cbus
+
+
-
AC
AC
AC
Line
Isolating
Transformer
How to Size Cbus
3 A
RMS
cont S200 6 A
RMS
cont S200
------------------------------ ---------------------
-
---------
2,000 µf / drive at 75 V bus 4,000 µf / drive at 75 V bus
4,000 µf / drive at 48 V bus 8,000 µf / drive at 48 V bus
16,000 µf / drive at 24 V bus 32,000 µf / drive at 24 V bus
Unregulated, Isolated Supply
+24 V, +48 V, +75 V
Gnd
DC Input S200
DC Input S200
10 ft max
PE
see below
+
Local Cap only required
for stand alone 6
ARMS
S200 that runs warm
(470 µf , 100V, lowers aluminum within 1 ft of drive if HsTemp>65C)
WIRING MULTIPLE DC DRIVES
+Bus
J1-3
Bus/Ctrl Gnd
+Ctrl
J1-1
+Bus
J1-3
Bus/Ctrl Gnd
+Ctrl
J1-1
J1-2
J1-2
CAUTION
An appropriately-sized output capacitor in the main power supply
is the key to economically delivering high peak power. In most
applications, the capacitor supplies much of the peak power
needed to accelerate the motor and inertia (under 20 ms). It also
lowers the cost of the supply by reducing its silicon current. In
addition, it also absorbs regenerated energy with a limited pump
up of voltage and stabilizes the bus voltage for better dynamics.
NOTE
While the maximum peak-to-continuous power capability is 3:1,
most applications have much higher ratios. The requirement that
the main supply have a high peak-to-continuous power ratio is
very important in selecting or designing the power supply.