Inverter
2.8
Figure 2.7
Inverter Layout
The inverter is composed of IGBT’s, inductors, capacitors, highly efficient filters,
control circuitry and protection circuitry. This inverter inverts the DC power
received on the DC bus to isolated, noise-free AC power, which is then supplied
to the critical loads. Our PWM wave generator is switching at a higher frequency
well above the human audible range.
The Voltage regulating circuitry limits the output voltage variation to within 1% of
the nominal voltage and special compensation circuitry has been added to
eliminate output distortion. Every component is oversized to accept a wide DC
input range (from 285 to 420VDC), allowing the output waveform to remain
sinusoidal throughout the entire range. With the aid of dynamic feedback loop
circuits the inverter maintains a true sine wave output, even if non-linear loads
are connected.
The system is designed to incorporate an independent inverter per phase. These
inverters are totally independent of each other preventing the possibility of
cascading failures. This allows the user to connect loads to adjacent inverters
without affecting the other inverters providing high-end voltage regulation under a
100% unbalanced load situation.
The IGBT is operated in its optimal condition to obtain maximum efficiency,
keeping electrical costs to a minimum.
Usually, most ELI failures are a result of inverter failures. To prevent this
occurrence, Tycor UPS has included redundant protection circuitry to protect the
inverter and increase its reliability. To enhance this protection we have also
added a high efficiency filter designed to suppress the spikes and noise that can
be reflected from the attached loads
back into
the ELI system.
oversized and high quality components, additional semi-conductor
allowing for good ventilation systems within further increase reliability.
Specifying
fuses and
9
M4102 Ty-Borealis 8-48KW Operators Manual v1.0 2013-08-14
