66 | SAMLEX AMErICA INC.
SAMLEX AMErICA INC. | 67
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heat Sink:
In cast the temperature is >65C, the charging current is reduced by 4A
(EVO-2212E) / 20A (EVO-3012E) / 1A (EVO-2224E) / 5A (EVO-4024E) every 10 sec
4.12 oPtionAL reMote ControL eVo-rC For ProgrAMMing oF MoDeS
oF oPerAtion AnD PArAMeterS
Optional remote Control Model EVO-rC [fig 2.4(a)] will be required for more advanced control
and monitoring. Please see separate Owner’s Manual for EVO-rC at Appendix A. The remote
Control comes with 10M / 33 ft., rJ-45 Data Cable. The remote plugs into rJ-45 Jack on the
front panel of the unit (7, fig 2.1). It has provision for Data Logging using SD Card of up to 16
Gb (fAT16 / fAT32). It also has its own real Time Clock and Super Capacitor Type of Internal
battery. The remote Control will be required for firmware upgrade through the SD Card.
Detailed messaging is available through its LCD display and LEDs. This remote will also be required
for programming of various parameters to suit specific requirements. Each programmable
parameter has a Default Value.
this unit has been shipped with the various parameters set
at the Default Values. Programmable and Default values are shown in tables 6.2 to 6.6.
i
inFo
For background information on batteries and charging process, please read Section
1.4, “general information - Lead Acid batteries”. All battery charging voltages are
specified at battery temperature of 25
˚
C / 77
˚
F.
SECTIOn 5 |
Battery Charging in Evolution Series
5.1 PrinCiPLe oF oPerAtion oF bAttery ChArging SeCtion
EVO
TM
Series is a bi-directional Inverter / Charger with a Transfer relay that operates either as
an inverter Or as a battery charger. It uses a common Converter Section that can work in two
directions – in one direction it converts external AC power to DC power to charge the batteries
(Charging Mode) and in the other direction, it converts the DC power from the battery to AC
power (Inverting Mode). PWM design is used for both the charging and inverting sections.
Please note that it cannot work in both the directions at the same time (i.e. it cannot work as
an inverter and as a charger at the same time). High performance, 100 MHz DSP (Digital Signal
Processing) type of micro-controller and Pulse Width Modulated (PWM) conversion circuits are
used for the above implementation.
When AC input power from Grid / Generator is available within the programmed limits of
voltage and frequency, the internal Transfer relay passes through the AC input to the AC loads
and at the same time, the AC input is fed to the battery Charger Section.
first, the AC input voltage is stepped down by the Low frequency Isolation Transformer and
is then rectified by 4 sets of H-bridge Mosfets and fed to the batteries for charging. When
charging starts, the current does not rise sharply, but ramps up slowly to the full programmed
bulk Charge curent.
SECTIOn 4 |
general Description & Principles of Operations
