Section II
General Product Information
006-0006504 02/27/18
Rev R
8 of 56
UPS-3000 Guide
www.synqor.com
Product Topology
The SynQor UPS-3000 Series products use a true on-line double conversion topology that
provides protection to the load from spikes, noise, surges, brownouts, blackouts, etc. in the
input power sources. They also provide smoothing of load transients and nonlinear load
profiles so that the input power sources are not subjected to these disturbances. There is
a seamless transfer from any power source to another so that there is no disruption in the
output voltage waveform.
As the figure below shows, there is a nominal 28 V mid-bus within the UPS that draws power
from one of up to three power sources: the AC INPUT, the optional DC INPUT or the battery
(with that order of priority based on availability). EMI filters are present at all external inputs
and outputs.
AC
INPUT
DC
INPUT
DC2
OUTPUT
2x DC1
OUTPUT
AC
OUTPUT
AC to DC
w/ PFC
and
ISOLATION
BATTERY
with
CHARGER
and
ELECTRONIC SWITCH
(OPTIONAL)
(Not available with DC2 Option)
ELECTRONIC
SWITCH
ISOLATED
INVERTER
BULK ENERGY
STORAGE
CAPACITOR
ISOLATED
DC-DC
CONVERTER
(OPTIONAL)
(OPTIONAL)
(OPTIONAL)
ISOLATED
DC-DC
CONVERTER
CIRCUIT
BREAKER
SINGLE-POLE
ELECTRONIC
BREAKER
Power flows from the AC INPUT through an AC-DC converter that has Power Factor Correction
(PFC) and high-frequency safety isolation stage. Power flows from the DC INPUT through an
electronic switch that is closed when the AC INPUT power is absent and the DC INPUT voltage is
within its specified range. Otherwise, a second electronic switch is closed to connect the battery
to the mid-bus.
