HL1.DEC–DSK–SC
First all-digital UPS overcomes obstacles analog types can't budge
The supply delivers smooth, continuous power while reducing size and
weight
Up to now, uninterruptible power supplies have used bulky, inefficient
analog components in their design, thus subjecting the supply's sine-wave
output to possible fluctuations. The Perfector UPS, on the other hand, has
all-digital circuitry, resulting in a clean, pure sine-wave output, even
under load. On top of the Perfector's superior output characteristics,
the digital design also produces very high efficiency–better than 96%.
And, the digital circuitry reduces the size of the supply to one-third
that of analog UPSs having a comparable power rating, says the company.
The digital circuitry also allows the user to program input and output
specifications like voltage, frequency, and acceptable ac power
conditions. These parameters can be changed through reprogramming the
UPS's microprocessor ROM, or by hardware modifications done by the
company. Said to be the first UPS with all-digital circuitry, the on-line
Perfector is controlled by a 14-MHz CPU. This CPU filters and conditions
incoming ac power, routing it to conditioned outlets for peripheral
devices not requiring critical UPS protection, and to a dc converter that
powers the battery charger. The UPS manages a constant charge/discharge
cycle for the batteries, thus prolonging battery life. THe UPS recharges
the batteries at a decreasing rate from 6 down to 0 A, thus allowing fully
discharged batteries to recover 80% within 2 hours, as opposed to up to 24
hours for other fully discharged systems. Specifications for the UPS
include input and output voltages of 120 Vac, and input and output
frequencies of 60 Hz. Total harmonic distortion is 5% max. The UPS has
both a Novell and RS-232 interface. It is initially available in two
900-VA models designated the DBB-9 and DBB-9Z, the latter adding power
monitoring capability. (DBB-9, $1,599; DBB-9Z, $2,599–available Jan.
1993.) DSK Power Products, Inc. Orem, UT Lisa Kohert 801-224-4828 Fax
801-226-7280
CAPTION:
The DSK Perfector UPS's all-digital components allow it to produce a
distortion-free sine-wave output.
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