Switching losses Eoff is reduced by approx. 15% ;
Copyright © Infineon Technologies 2009. All rights reserved.
1200V High Power IGBT4- Softness measurement
f=5kHz IGBT
Dynamic Loss 100 92 87 73 62
m=0.88 Diode
Static Loss 23 21 19 19 21 Dynamic Loss 28 35 44 44 40
Typical curve Vcesat vs Tvj
Static Loss
FF200R12KE3 FF300R12KE3 FF400R12KE3 FF400R12KT3 FF450R12KT4 177 142 125 119 124
Solar solution
Solar inverter and Infineon solution
2011/3/8
Page 2
Table of contents
Topology in solar inverter High Efficiency Inverter Design Solution for solar inverter Application Support Competitor in Solar
Copyright © Infineon Technologies 2009. All rights reserved.
B6 Bridge
Pros

Harmonic Grid Control possible High DC- link voltage possible

Cons

DC link Voltage window Low efficiency
S2 S3

Cons

3 switches involved for energy transfer to the grid DC link Voltage window (Vacp=min Vdc)
Switched with 50Hz Switched with 16kHz S1 is used for ripple reduction and Efficiency improvement, no current is flowing to CBulk during commutation
E3 T3 KS4 DN2 DLC
0 1 2 3
Saturation voltage VCEsat [V]
4
Typical values @ Tvj=125°C
5
LoPo - IGBT4 Low Power MePo - IGBT4 Medium Power
V CEsat [V]
HiPo - IGBT4 High Power for PrimePACK for Electric Vehicle
1200V Medium Power IGBT4
Condition: Softness Vs. Vdc@Tvj=25℃, Inom=300A (FF300R12XX)
Vdc=700V IGBT3-E3
Vdc=800V
2011/3/8
IGBT-E4 E4 is slightly softer than E3;
2011/3/8
Copyright © Infineon Technologies 2009. All rights reserved.
Losses Chain in Solar inverter
Low losses on Semiconductor Low Power on colling system
-15% LoPo Eoff
-20% Eoff
IGBT4 High Power: improved softness IGBT4 Medium Power: lower switching losses than E3 with the same softness IGBT4 Low Power: lower switching losses than T3 with the same switching characteristic
S1
S2
S3
S4
S5
S6
Copyright © Infineon Technologies 2009. All rights reserved.
Table of contents
Topology in solar inverter High Efficiency Inverter Design Solution for solar inverter Application Support Competitor in Solar

Cons

transformer & switch losses Number of Switches
Switched with 50Hz Switched with 16kHz Switched with 30.. 150kHz S1 S2 S3 S4 D1 D3 D2 D4 S5 S6 S7 S8
Copyright © Infineon Technologies 2009. All rights reserved.
Heric- Bridge
Pros


Only 1 switch active in free wheeling phase
Asymmetric HF modulation possible Very high efficiency , Peak efficiency 98%+
Condition:
Turn off characteristic for 2400A-Modules without active clamping control.
(Rg=0.3Ω, Io=1/2Inom, Tvj=25℃)
IGBT3
IGBT4
1200A
1176V 1200A
250V
P4 is softer than E3;
1200V IGBT chip for different application
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1200V Low Power IGBT4
Condition: Turn-off process of IGBT4 vs.IGBT3 under untypical test for extremely high parasitics stray inductance; (Ta=25°C, Inom=150A, Lδ=200nH, Vce=400V/450/500V)
One phase chopping HF chopping on S2 and S4 LF chopping on S1 and S3 No current flow back to C1 and ripple reduction Peak efficiency 94%+
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Dynamic Loss
100 92 87 73 62
Next Better
100% 85% 91% 91% 96%
Last best
100% 85% 77% 70% 67%
/ us
T4 is slightly softer than T3;
Approx switching losses Eoff is reduced by 15% ;
2011/3/8 Copyright © Infineon Technologies 2009. All rights reserved.
NPC 3-level
IGBT sustain ½ Vdc-link Split Bulk of capacitance, middle point connected to earth Asymmetrical Boost stage Peak efficiency 98%+
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Double boost + H-bridge
Syቤተ መጻሕፍቲ ባይዱmetrical chopping
HF chopping on all switches Individual MPPT per module
Maximum power output from each PV panel
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EFFICIENCY
Low loss on filter Low loss on transformer
Copyright © Infineon Technologies 2009. All rights reserved.
How to increase solar inverter efficiency?
T type 3-level
IGBT switch at ½ Vdc-link, but should sustain Vdc-link when turn off Split Bulk of capacitance, middle point connected to earth Asymmetrical Boost stage Peak efficiency 98%+