03-12-2012, 01:36 PM
The Comparative Analysis of UPS topology
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INTRODUCTION
Unintemptible power supplies (UPS) are an important
component of radioelectronic equipment, which realizes
transformation of the electric power of a net into the electric
power with arguments that provide normal operation of
equipment.
The quality of the electric power is the combination of
calculation values of its arguments, when this values provide
suitability of the electric power for normal operation of
radioelectronic equipment. The main arguments, which
characterize UPS, are values of non stabilized input and
stabilized output power, current of load, admissible range of
their change (static, dynamic), the values of output power
pulsing, hindrance resistance, noise immunity, efficiency, the
range of working temperature, measurements, mass, reliability,
price.
CONTEMPORARY TOPOLOGIOEFS U PS
Nowadays the following topologies for construction of
UPS are used: standby (I), linearly-on-line (2), double
conversion (3), delta-transformation (4).
Reserve UPS (fig.1) consists of the switch of the load,
device of battery charge, the battery and the inverter.
In conditions of normal operation the toggle of the load
is in showed in a figure, so that load feeds from the electrical
network. The device of battery charge is switched on all time.
This guarantees a complete charge of battery. The inverter in
normal state is switched off. Afier detecting deviations on an
input from the electrical network the inverter is powered up,
and the toggle of a load aggregates it to the load. The basic
scheme of linearly - on-line topology is presented in a fig. 2.