18KW logistic vehicle charger

Release time:

2023-05-24 11:08

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PROJECT INTRODUCTION
This reference design is a solution for logistic vehicle charger withover 700V bus input, which outputs a wide voltage range of 42-60 Vand maximum current 300 A. Phase shift full bridge topology wasdesigned to realize ZVS operation for the main switching MOSFETs.and current doubling rectification reduce the output rectifier devicescurrent stress and also the inductor volume.
 
DESIGN SPECIFICATION
Input Voltage 700Vdc
Output Voltage 42~60Vdc
Rated Power 1800W
Switching Frequency 96% Max
System Efficiency 100KHz

 

FEATURES

· 100KHz high frequency, greatly reduce the volume ofinductor and capacitor:

· Simple and reliable transformer driver for both high side and low side MOS.

· Current doubling rectifier, inductor volume reduce by 50% and winding loss reduce to 25%:

· Optimized clamping circuit;

 

MAIN TOPOLOGY

pic

 

MAIN DEVICES
 
Function Part Number Brand
Full Bridge MOS IXFN90N85X IXYS
Rectifier Diode DSA3001200NA IXYS
Claim Diode C4D08120A Wolfspeed
MOSFET Driver IXDN614 IXYS

 

 MEASUREMENT RESULTS AND WAVEFORMS

PICEfficiency vs. Io

picVgs & Vds @ 50A output

 

 

pic200A Vgs&Vds

pic50A 整流管电压&Ipri&Vgs

 

 

picDiode voltage & Ipri & Vgs @ 200A output

picOutput voltage ripple 94mV @ full load

 

 

picDynamic: 0% load to 50% load

picStart up @ full load

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18KW logistic vehicle charger

2023-05-24