Kohler PowerWAVE 8000DPA RI (S2) Series, Руководство пользователя, Страница: 15 / 88

TS_616_08 PW8000DPA ST (S2) User Manual 21/4/22
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2: General Description
2.3 Functional description of operation
This section describes:
• A block-diagram level explanation of the UPS module internal operation (see paragraph 2.3.1) .
• The various operational states of the UPS module
(see paragraph 2.3.2)
.
• UPS system-level operation – ‘ ON-LINE ’ versus ‘ OFF-LINE ’ UPS system operation (see paragraph 2.3.3) .
2.3.1 UPS Power module internal operation
Figure 2.3 UPS module functional block diagram
UPS input/bypass mains supplies
Figure 2.3 illustrates separate UPS module input mains and bypass mains supplies. These two inputs can be connected
to separate mains power sources or linked together at the UPS input power terminal blocks and fed with a single mains
supply source. Where the UPS is cabled for separate mains inputs it is described as having a ‘split-bypass’ input;
conversely, when the two mains inputs are linked together it is described as a ‘common-bypass’ input.
Rectifier (PFC controlled converter)
The rectifier converts the UPS input mains to a DC power source that can satisfy the inverter power demands at 100%
load. This is possible with a UPS input mains voltage range of -20% to +15%. This wide input voltage operating range
means that the battery is not called upon during substantial power dips (brown outs), which in turn maximises the UPS
battery life and availability. The rectifier uses leading-edge switched-mode techniques that result in a module input power
factor of almost unity over its complete operating range (0.99 at full rated linear load).
DC Boost converter
The DC boost converter converts the DC voltage connected to its input, from either the rectifier or battery, to a regulated
DC voltage that is required by the inverter to operate efficiently.
Battery charger
A multi-stage battery charger, powered from the DC boost converter regulated output, charges the battery whenever the
UPS input mains supply is available and the rectifier/boost converter is turned on. The charger uses an intelligent charging
profile to obtain the best battery charge/discharge performance to optimise the battery life.
Inverter
The inverter converts the regulated DC voltage applied to its input into a sinusoidal AC output that is suitable for
connecting to the load equipment. In addition to providing output voltage regulation, the inverter control logic also provides
various levels of overload protection, frequency regulation and synchronisation, and output voltage error detection.
AC/DC (PFC)
RECTIFIER
DC BOOST
CONVERTER
DC/AC
INVERTER
BATT. CHARGER
STATIC
SWITCH
UPS AC
Output
UPS
Bypass
Mains
UPS
Input
Mains
BATTERY
UPS MODULE
Input
Relay
Automatic
Batt. Switch
Output
Relay