Miracle #03 16 июля 1999

Железо

Myself - Uninterruptible Power Supplies: UPS-information technology.

    (R) Ice'Di Griz / Triumph:

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          Uninterrupted operation of any electrical
      technical and electronic equipment

      depends on the stability of parameters of
      industrial network. Stability parameters

      network can be expressed in network interference, based
      vnymi of which are high

      pulsed voltage surges (up to 3 kV)

      Periodic surges at

      amplitude, long-term decline in

      voltage to 150-170 V, periodic

      voltage drop when connecting a powerful

      equipment, frequency instability,

      supply voltage short interruptions
      of, etc. etc. All of these bugs affect

      to the computer. Unique
      vennoy protected computer and other equip
      dovaniya from network interference are the source
      Nicky UPS - UPS, or

      (Uninterruptible Power Supply).


    Depending on the operating principle there are three types 
of UPS: 

1. UPS architecture off-line.

In multiplayer mode, UPS off-line
feeds the computer through a branch,
containing only the input
filter.



Simultaneously, the charger recharges the UPS batteries. If the 
pitch electricity declined or

supply voltage was below
some acceptable value,
UPS includes a battery power. Since the computer and peripheral 
equipment provides voltage industrial AC, constant battery 
voltage to be converted a variable with a value corresponding 
to the nominal value of voltage. For

that the UPS uses a special device - Inverter. Among the 
advantages of UPS off-line it is worth noting the simplicity 
circuit design, low cost, minimum size and weight.

These sources are useful
used to protect personal computers, peripheral equipment, 
consumer office equipment.


2. UPS architecture on-line.

UPS of this type are called
sources with a double drive. They input voltage through the 
rectifier converted into a permanent and

enters the high-
(HF) transducer.



The output of RF converter
voltage high frequency
goes to the inverter and from the
the output device. The need for an RF converter due to the fact 
that significant changes in voltage are converted into

relatively small changes in frequency of the RF signal and its
output. Charger and
the battery is connected directly to the output of UPS. This
achieved little time switching and stability parameters for the 
output variable voltage UPS. In addition,

this construction type UPS
on-line provides galvanic isolation between the industrial 
network and power supply computer. Uninterruptible power supply 
architecture on-line have a higher

value and used when needed a reliable and
quality protection of vital
essential equipment, often
working around the clock (eg servers).

3. UPS hybrid architecture

    (Line interactive UPS).

In essence, these UPS are
improvement in UPS type
off-line. Such sources
inverter is continuously connected
to the exit, so ensure


ensured electrical isolation. Such power can, in principle 
yuzatsya to protect the equipment of both

described above categories. Often the choice between UPS type
on-line and line interactive
determined not so much the functional characteristics
how much they cost.