5KW capacitive load AC_DC charger

Release time:

2023-05-24 14:26

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PROJECT INTRODUCTION
The reference design is a peak 5KW AC/DC solution for capacitiveload,with input range 90-264Vac and output OV~700V/7AInterleaved parallel PFC and phase-shift full bridge DC/DC weredesigned to adapt to the wide output voltage range of 0-700V. Tomeet the design spec of high capacitive load, the current loop soft-start was optimized and CC & CV dual control loop was designed toensure the system reliability.
 
DESIGN SPECIFICATION
Input Voltage 90Vac~264Vac
Output Voltage 700Vdc
Rated Power 5000W
Switching Frequency PFC: 60KHz; Full Bridge: 100KHz
Rated Load Charging Time 10mF (1s charge from 0-700V)

 

FEATURES

· MCU control, input power auto-regulate according to different input;:

· 10mF charging form 0 to 700V in 1s;

· Patented current-loop soft-start method, fast power replenishment;

· Online high frequency charging and discharging:

 

MAIN TOPOLOGY

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MAIN DEVICES
 
Function Part Number Brand
Input Fuse 0324040.MXP Littelfuse
Relay CHS01-S-112LA Churod
Input Rectifier IXTH60N65X2 IXYS
PFC MOS IXTH60N65X2 IXYS
PFC Diode C3D10060A Wolfspeed
Current Sensor MCA1101-20-5 Aceinna
Full Bridge MOS IXFH46N65X2 IXYS
Output Rectifier C5D05770H Wolfspeed
Driver IXDN604SIA IXYS
MCU SPC1168 Spintrol

 

 MEASUREMENT RESULTS AND WAVEFORMS

 

picWorking waveform @110Vac input

picWorking waveform @220Vac input

 

 

pic110Vac input, 3.5A output charging

pic230Vac input, 7A output CC charging

 

 

picPSFB lag leg driver start up

picPSFB lead leg driver start up

 

 

picHigh frequency charge & discharge ( continuous flash ) Vout&lout&Iin

pic50Hz charge & discharge ( continuous flash ) Vbulk&lout&Iin&Vout

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