Piller
UPS Application Design Guidance 1
UNIBLOCK UBR Hybrid Rotary UPS - Operation
Normal operation is through the static switch (thyristor)
path (Mains 2). The thyristor switch is controlled so that active
power flows only in the direction of the motor of the UNIBLOCK
machine. The generator of the UNIBLOCK machine supplies the load
with the same dynamic characteristics as an AC supply system.
In the event of a fault in the thyristor switch
the UNIBLOCK machine is supplied exclusively by the rectifier and
inverter circuit (Mains 1). Similarly during a failure of the
rectifier/inverter circuit the UNIBLOCK machine is supplied by the
thyristor switch.
In the event of a mains failure the UNIBLOCK
machine is fed via the battery and inverter with the input
contactors opened.
The generator of the UNIBLOCK machine can supply
peak currents without being limited by the current ratings of
additional semiconductors. The impedance of the generator – which is
similar to that of the AC line – delivers a short-circuit current of
up to 18 times the rated current without switching back to Mains
(even when operating in battery mode).
The motor voltage provides natural commutation
for the inverter and the UNIBLOCK machine generates a sinusoidal
voltage so no power capacitors are necessary for commutation or
filtration. The brushless excitation of the motor/generator is
provided by an exciter mounted on the shaft and the generator
voltage is electronically regulated.
The internal redundancy combined with no
capacitors and control redundancy make the UBR Hybrid Rotary UPS the
most reliable UPS available. In addition since the UPS does not
normally operate through the double conversion path it achieves
efficiencies in excess of 95%.
UNIBLOCK UBR Hybrid Rotary UPS - Single Line Drawing
Piller UNIBLOCK UBR Hybrid Rotary UPS Guide to
Dimensions & Weights
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Technical information associated with:
Piller (UK) Ltd - UPS Application Design Guidance - Part 1
Piller (UK) Ltd - UPS Application Design Guidance - Part 2
Piller (UK) Ltd - UPS Application Design Guidance - Part 3
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