Transformer-less 2 kW Non Isolated400 VDC/230 VAC Single Stage Micro Inverter

Powering the Software Defined Network

Transformer-less 2 kW Non Isolated400 VDC/230 VAC Single Stage

Micro Inverter

Intelec 2016O. BOMBOIR, CE+T Power

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Why such a small inverter?

• Google & IEEE ‘Little Box Challenge’

• Decentralized production requires compact

static converters

• We’ve been shrinking inverters since 30 years

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Mechanical Electronics

Software

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Forced cooling M e c h a n i c a l

Pc = As(Ts-Ta)Cc

Pr = As(T4s-T4

a)Cr

=> 99,5% efficiency required!

Forced Cooling Mandatory

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Heatsink & Thermal M e c h a n i c a l

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Capa positioning M e c h a n i c a l

Capa used as heatsink’s fins !

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Sandwich layout M e c h a n i c a l

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GaN controlers E l e c t r o n i c s

GaN

IGBT

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MLCC Vs Electrolytics Capa E l e c t r o n i c s

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Topology E l e c t r o n i c s

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Magnetics sizing E l e c t r o n i c s

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Zero Volt Switching S o ft w a r e

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Active Filtering S o ft w a r e

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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 °CAmbient T° of test 29 °C 30 °CEMI compliance FCC Part 15 B FCC Part 15 B

S o ft w a r eM e c h a n i c a l

Powering the Software Defined Network

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Bi-directionality + µGrid + Virtualization=

Power Virtualization

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Server rack

Backup rack

Data flow

AC Power

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Server rack

Backup rack

Data flow

AC Power

DC Power flow

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THANK YOU