CEATEC2013-09 e A4 (210mm×297mm)
Bidirectional DC-DC Converter
CEATEC2013-09
EZA Series: Isolated Type Bidirectional DC-DC Converter with
2.5kW Output Power and 94% Efficiency
This isolated DC-DC converter can do power conversion in both directions. Serial communication can be
used to implement voltage and current control.
The conversion direction can be switched externally, and autonomous operation is also possible.
Features
• Digitally optimized control realizes conversion efficiency of 94% or better in both directions.
• Autonomous operation allows automatic switching of conversion direction to keep input voltage or output voltage constant.
• Fast conversion direction switching without stopping operation minimizes bus voltage fluctuations.
• Input/output isolation enhances safety and facilitates noise countermeasures.
• Serial interface (RS485) allows control of current, voltage, and conversion direction, as well as status monitoring.
Major Applications
• Electrical storage systems (charge/discharge control of lithium ion battery connected to DC bus)
• Various energy regeneration setups
• Motor energy regeneration & peak assist systems
• Energy regeneration systems in battery-equipped equipment and in equipment manufacturing process, etc.
Advantages
•
Easy configuration of energy management systems involving a combination of solar or other power generation
and battery storage
< System configuration example >
System
power
supply
・Stabilization of DC bus with storage battery
・Regeneration of energy from storage battery
Power
receiving
equipment
Solar power generation
Wind power generation
Fuel cells
Converter
300–380V DC bus
AC ⇔ DC
inverter
Electrical or electronic
equipment (DC input)
Control via external
communication
Electrical supply in case of
power failure,
peak-time power cut etc.
Normal
electrical
supply
Discharging
Secondary
batteries
Electrical or electronic equipment (AC input)
Charging
Storage battery
48V
Bidirectional DC-DC converter
EZA2500
• High-speed charge/discharge switching helps to
• Basic Specifications
suppress voltage fluctuations in high-voltage DC bus
Discharge → Charge → Discharge switching characteristics Current waveform on 48V side
Seamless
switchover
Charge
+42A
Seamless
switchover
Charging
Discharging
Output voltage
48VDC（36-60VDC）
320VDC（300-380VDC）
320VDC（300-380VDC）
48VDC（36-60VDC）
Input voltage
Max. efficiency
Max. output power
OA
Discharge
20A/Div
-42A
20ms
20mS/Div
Discharge
20ms
EZA2500-32048
Product name
Item
Dimensions
94%
94%
2.5kW
W:422.8mm H43.6mm（1U）D:400mm
External control
RS485
Operation mode
External/autonomous (external control via RS485)
Other items
Input/output isolation, expansion by parallel operation possible