ElmoMC Power Supplies-TAM-20 - Manual (Page 21)

Tambourine 20 Power Supply Installation Guide
MAN-TAMIG (Ver. 1.501)
|Mounting and Wiring the Tambourine 20| www.elmomc.com
21
Table of Contents
3.4.3 AC Power Source
The AC voltage supply can be of any voltage within the range defined in the Tambourine 20
technical specifications. It must be able to deliver power to the servo drives (including peak power),
without significant drops. A three-phase supply is always recommended whenever possible, in
order to provide better DC bus voltage stability (low voltage ripple) under high load conditions.
Inrush current control is included within the Tambourine 20 power supply, which makes the
Tambourine 20 capable to be fed directly from the mains, whenever it supplies isolated drives.
When operating with a single-phase supply, a voltage drop due to loading is expected. The
magnitude of the voltage drop depends on the load current and the stiffness of the power source.
The following is a graph showing the typical expected VP+ drop, at certain load current when
supplied by a single AC phase source:
TAMBOURINE VP+ Output Derating vs. Load current
100%
95%
92%
89%
85%
0%
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%
110%
0 3 5 8 10 13 15 18 20
Load Current [A]
VP
+ O
ut
put
[
%
]