BRUSA Elektronik AG
Neudorf 14
Postfach 55
CH-9466 Sennwald
Switzerland

Tel: +41 (0)81 758 19 00
Fax: +41 (0)81 758 19 99
Email: info@brusa.biz
Homepage: www.brusa.biz
BSC618-24V
 
 
Bidirectional auxiliary high voltage converter, 400-900VDC, 28VDC, 125A
Features
  • Bidirectional Operation
  • Resonant topology ensures low switching losses and excellent EMC-behavior
  • Very high efficiency
  • Compact and lightweight
  • CAN-controlled
Description
The BSC618-24V is a bidirectional DC/DC-Converter with galvanic isolation between the high voltage and low voltage circuitry. The first stage is a series-resonant operating transformer, which provides galvanic isolation. The second stage is a pair of buck/boost-converters, that are operated interleaved in order to reduce ripple current. Due to the resonant topology of the transformer stage and the AutoCommutation of the buck/boost-converter, not only losses are reduced to a minimum but also an excellent EMC-behaviour is obtained.

Applications
  • Electric, hybrid and fuel cell trucks and buses
  • power link between high and low voltage power circuits in a vehicle
  • provide power on the LV side for loads like headlights, wipers, radio etc.
  • provide power on the high voltage side from 24V battery for startup of engines or fuel cells
  • substitute alternator / cranking motor / 24V battery, depending on the application
Technical Characteristics
High voltage side  
HV-voltage range400 - 900V
Low voltage side  
LV-voltage nominal28.0V
LV-voltage range18 - 32V
Performance  
LV-continuous current
(@ Tcoolant = 65°C)		100A
LV-maximum current125A
Continuous power
(@ ULV = Unom )		2.8kW
Maximum power
(@ ULV = Unom )		3.5kW
Efficiency typ.>91%
Switching frequency buck/boost stage40-130kHz
Switching frequency transformer stage200kHz
Control  
Control bandwidth (3dB - point)~ 1kHz
Control accuracy of LV-voltage (buck mode)< 0.2V
Control accuracy of HV-voltage (boost mode)< 1.0%
Mechanical and environmental conditions  
Cooling systemLiquid (50% water, 50% ethylene glycol) 
Nominal flow rate4l/min
Pressure drop
(@ nominal flow rate)		< 0.1bar
Ambient temperature range (storage)-40 - +105°C
Ambient temperature range (operation)-40 - +85°C
Maximum coolant temperature65°C
Ingress protection classIP65 
Dimensions300 x 150 x 70mm
Weight4.7kg
Price
On request