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30KW DCDC for traction

Release time:

2023-05-24 10:25

PROJECT INTRODUCTION

This reference design is a 30kW wide range DC/DC converter withinput range 400-950Vdc, rated output 110V/273A (output range90V~130V). The main topology adopts interleaved parallel Boost andLLC, and output rectifier used Schottky diode to get the extremelyhigh efficiency and reliability. This solution can be widely used inrailway or subway ground power supply.

DESIGN SPECIFICATION

Input Voltage	400vdc-700Vdc
Output Voltage	90-130Vdc
Rated Power	30KW
System Efficiency	95%
Switching Frequency	Boost：45KHz；LLC：60~150KHz

FEATURES

· Base on SiC design, fsw up to 50KHz, greatly reduce system volume;

· Agileswitch SiC module driver board, with short circuit protection:

· High system efficiency, up to 95%;

· Interleaved Boost, minimize the current ripple and inductor volume:

· LLC primary in series and secondary in parallel connection;

· Battery temperature compensation, real-time calibrate charging curve

· Full protection, including input OVP, UVP & OCP, output OVP, UVP & OCP

MAIN TOPOLOGY

MAIN DEVICES

Function	Part Number	Brand
Bbost MOS	C2M0045150D	Wolfspeed
Boost Diode	C3D25770H	Wolfspeed
Boost Rectifier Bridge	VUO160-16NO7	力特
BOOST MOSFET Driver	IXDN609SIA	力特
LLC MOS	CAS300M17BM2	Wolfspeed
LLc Diode	DSA3001200NA	力特
LLC MOSFET Driver	NSI6602B-DSPNR	纳芯微