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3.6KW Bi-directional energy storage converter

Release time:

2023-05-24 14:18

PROJECT INTRODUCTION

In this design, input range is 90Vac-264Vac and output is 39-55Vdc/55A. A singleSpintrol ARM4 MCU is used as system controller, Totem-pole PFC and synchronousLLC is designed in the system, to realize bi-directional charge & discharge energyflow.The forward charging uses CC&CV dual control loop and the reverse inverter usesSPWM design. The inverter outputs pure sine wave, and the resistive load outputUTHD is less than 2%; The RC and RL load output UTHD is less than 3%: The RCD loadoutput UTHD is less than 5%.

DESIGN SPECIFICATION

Input Voltage	90Vac~264Vac
Output Voltage	39Vdc~55Vdc
Rated Power	3600W
System Efficiency	PFC: 45KHz;LLC: 80-350KHz
PF	>0.99
Switching Frequency	PFC: 45KHz: LLC: 80-350KHZ

⽅案特点

· Single ARM4 MCU is designed to control bi-directional PFC and LLC with fullprotection, including input UVLO/OVP/OCP, output OVP/OCP. Compared with thetraditional DSP design, the system cost is greatly reduced;

· Forward charging uses CC&CV dual loop design; Reverse inverter uses SPWMdesign, smaller UTHD:

· PFC frequency is set to 45KHz. Compared with the traditional 20KHz design, theinductor volume is halved. Small volume and high power density:

· Novosense isolated half-bridge driver and amplifier are used to meet reinforcedinsulation requirements

MAIN TOPOLOGY

MAIN DEVICES

Function	Part Number	Brand
MCU	SPC1168	Spintrol
Input Fuse	0215020.MXEP	Littelfuse
Input Relay	CHFN-V-112HA2F(35A)	Churod
PFC IGBT	AUS65N65FP	Lu-semi
PFC Driver	NSI6602B	Novosense
PFC Current Detection	MCA1101-50-5	Aceinna
LLC Primary MoS	CPW60R09OFD3	Coolsemi
LLc Secondly Mos	SRTION043HTC-E	Sanrise
LLC Primary Driver	NSI6602B-DSPNR	Novosense
LLC Secondly Driver	MD18201A	Meraki