Development Trend:
EV Wireless Charging Station Module
?Power Density Challenges –High ratio coil size due to huge air gap between charging station and car–Magnetic stray field limited by Standard (ICNIRP), eddy current loss in shielding material–Low magnetic coupling limit power transfer efficiency such as coil misalignment ?Low power single phase module is for private car–Power level 3-6kW?High power three phase module is for passenger bus–Static charging power level 60kW–Dynamic charging power level below 5kW2015-09-Copyright ? Infineon Technologies AG
16Regulation and Standards
?The following Regulations & Standards for Inductive EV Charging must be met–ICNIRP 1998/2010: Guidelines for Limiting Exposure to Time-Varying EM Fields–Living Tissue is affected by power dissipation caused by Electromagnetic fields–Limitation of Human Body SAR (Specific Absorption Rate, W/Kg) by limiting electric and magnetic fields–Distinction between “General Public” and “Occupational Exposure”2015-09-
Copyright ? Infineon Technologies AG
17Design example:
3-6 kW Wireless EV private car charger
?
Design specification:–––
Input voltage: 220Vac, Output: ~240V-500V,
Switching freq.: 85kHz (PFC and Inverter*)
Function
PFC switch (Q1-Q2)dc dc switch (Q3-Q6)#
IFX part
IPW60R041C6 x 4pcs or IPW60R041P6 x 4pcsIPW60R041CFD x 4 pcs
or 600V E-mode GaN x 4pcs
*switching freq. control size of pick up inductive and efficiency
*Remark: D1-D2 uses Si diode due to TCM
#Since the resonant converter work on capacitive mode (leads the device operated at hard commutation ), only CFD2 series is proposed to resonant converter
Function
Battery charger switch Q7
IFX part
IPW60R041CFDA x 2pcs
GridPFCInverter
Industrial grade component
Remark: D3-D7 must be use SiC diode due to high switching frequency
Automotive grade component
**
2015-07-
Copyright ? Infineon Technologies AG
Page Summary
?For EV wire charging station, customers are looking for –Shorten charging time and paid less charging bill?It leads power module design trend to increase output power, increase power density, and increase efficiency?For EV wireless charging station, the coreless transformer design affects the system power density, safety, and power converter topologies selection–Power electronic engineers usually selected resonant converter at dc dc stage?Infineon provides the highest efficient power devices, CoolMOS, SiC diode, Driver IC, Automotive grade MOS with advanced package to achieve customer needs. 2015-09-Copyright ? Infineon Technologies AG
19
张建浩-电动汽车有线和无线充电站的发展趋势
