INSTRUCTION MANUAL
EZA11K Series
TDK-Lambda
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6-1. Automatic Battery CV Mode
Battery voltage is maintained at set target voltage.
If battery voltage is lower than the target voltage :
Generation Operation
（
Charge
）
If battery voltage is higher than the target voltage :
Regeneration Operation (Discharge)
Constant current control is for battery side current
both generation operation and regeneration
operation. For generating operation and
regenerating operation the target current value can
be set
separately.
Battery bus ramp up mode can be selected for
charged up capacitor (Max 15000
μ
F) of battery
side from 0V and/or for operation as bus converter.
By apply external voltage, HVDC side is more than 120VDC or LVDC side is more than 120VDC the control circuit
will be initialized and setting information will be loaded from the non-volatile memory.
At this point each LED will light up and turn off after completing the initialization process.
If the internal interface detects abnormality for some reason, the LED will remain lit up.
After the initialize process, the converter will be in waiting mode. Power conversion operation will start when the
operation command is sent.
The internal FANs are rotated during any power conversion operation.
FANs will stop after approximately 3 minutes when operation is stopped by operation command.
With this converter selection of operation mode such as Automatic Battery CV Mode, Automatic Grid CV
Mode or Manual CV Mode is possible.
Note that power conversion direction from HVDC (Grid) to LVDC (Battery) will be described as Generation
Operation (Charge) and power conversion direction from LVDC (Battery) to HVDC (Grid) will be described as
Regeneration Operation (Discharge).
After operation command is inputted regardless of the mode, the converter require approximately 10 seconds to
startup. In the meantime please do not the load fluctuation, input variation and change setting values.
6. Operation Mode
6/25
Converter
320V (HVDC)
240V (LVDC)
Input
(Grid)
Output
(Battery)
Generation
(Charge)
Regeneration
(Discharge)
Ibat
Vbat
Target Battery Voltage
Vbat
Ibat
Battery Under Voltage
Battery Over Voltage
ShutDown
ShutDown
Regeneration
(Discharge)
Generation
(Charge)
Battery Limit Current
(Charge)
Battery Limit Current
(Discharge)
0
Operating Characteristic
