Paper presented by Olivier Bomboir at Intelec 2016 Austin

1. Powering the Software Defined Network
Transformer-less 2 kW Non Isolated
400 VDC/230 VAC Single Stage
Micro Inverter
Intelec 2016
O. BOMBOIR, CE+T Power

2. – 2 –
Why such a small inverter?
• Google & IEEE ‘Little Box Challenge’
• Decentralized production requires compact
static converters
• We’ve been shrinking inverters since 30 years

3. – 3 –
Mechanical Electronics
Software

4. – 4 –
Forced cooling
Mech an ical
Pc = As(Ts-Ta)Cc
Pr = As(T4
s-T4
a)Cr
=> 99,5% efficiency required!
Forced Cooling Mandatory

5. – 5 –
Heatsink & Thermal
Mech an ical

6. – 6 –
Capa positioning
Mech an ical
Capa used as heatsink’s fins !

7. – 7 –
Sandwich layout
Mech an ical

8. – 8 –
GaN controlers
Electron ics
GaN
IGBT

9. – 9 –
MLCC Vs Electrolytics Capa
Electron ics

10. – 10 –
Topology
Electron ics

11. – 11 –
Magnetics sizing
Electron ics

12. – 12 –
Zero Volt Switching
Software

13. – 13 –
Active Filtering
Software

14. – 14 –
E l e c t r o n i c s
Parameter Realised Requested
Maximum Power Tested 2062 VA 2000VA
Volume of enclosure 225 cm³ 655 cm³
Power density 8850 W/litre 3050W/litre
DC voltage range 300 to 450VDC 399.5 V
AC voltage (RMS) output 240 Vac 240V +/- 12Vac
Efficiency (CEC Method) 95.4 % Min 95 %
Max Temp of Enclosure 48 °C 60 °C
Ambient T° of test 29 °C 30 °C
EMI compliance FCC Part 15 B FCC Part 15 B
S o f t w a reM e c h a n i c a l

15. Powering the Software Defined Network

16. – 16 –
Bi-directionality + µGrid + Virtualization
=
Power Virtualization

17. – 17 –
Server rack
Backup rack
Data flow
AC Power

18. – 18 –
Server rack
Backup rack
Data flow
AC Power
DC Power flow

19. – 19 –
THANK YOU