Post on 09-Jul-2020
•
•
••
•
•
•
•
•
Solar
•
•
•
0
2
4
6
8
10
12
Switching Efficiency Power Density
Silicon Carbide vs Silicon
SiC Si
•
•
•
•
•
•
•
•
•
•
•
•
CLLC Resonant Tank
AC
9
•
•
•
SiC Characteristics
• Smaller Size / Higher Density
• Smaller passive components
• Simpler / smaller Cooling
System Benefits
• 6.1kW On Board Charger (OBC) is 4x higher power density than existing 3.3kW
3.3kW Si OBC
6.1 kW SiC OBC
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
Ref. M. Su, et al, WiPDA 2016Acknowledgment -- EE0006920 “88 Kilowatt Automotive Inverter with New 900 Volt Silicon Carbide MOSFET Technology”
0
5
10
1 20
5
10
1 2
•
•
•
Enables 7-10% further range for same battery sizeOR
7-10% reduction in battery capability for same range
•
•
•
Layouts
1200 V- -
100A 110A 140A
900 V - - 140A
650 V 100A - 140A
SiC MOSFETs Enable EV Drivetrains
•
•
•
•
•
•
•
•
•
•
AC/DCFilter DC/AC AC/DCAC
Source
What : Fast charging from charge stations. 30 min charge durationBypasses OBC for rapid direct battery charging
Where : PHEV, BEV battery charging 80kW – 150kW. DC charge from station to car.Typically constructed from multiple 15-20kW blocks
Driving factors : Highest efficiency, Power density (smaller stations). Future trends bi-directional energy flow
SiC Advantage : >2% higher efficiency, 33% increase in power densitylower system cost
AC-DC Section DC-DC Section
SiC enables high efficiency high power density bi-directional 3 phase AC/DC converter
Si MOSFET
Q1
C1
C2
D5
D6
D1
D2 D4
D3
Q2
Q4Q3
Q6Q5
AC
V3
AC
V2
AC
V1
L1 L2 L3
Si IGBT
Simplify with SiC
• Less components• Lower cost• Higher efficiency• Smaller size• Bi-Directional power
SiC MOSFET C3M0065100K
TO-247-4 Package
12 Devices
20kW AC-DC power stage
Silicon solution SiC Solution
SiC MOSFET C3M0065100K
TO-247-4 Package
C3D20065DTO-247-3 Package
15kW Silicon hardware 20kW Silicon Carbide hardware• 33% more power in 33% less space• Simplify circuit design• Lower cost• Increase Efficiency• Reduce size
Simplify with SiC
4 devices
8 devices
Silicon Wolfspeed SiC
•
•
•
•
•
900V rated voltage
•
•
•
•
•
•
•
The Market Situation- Monumental 20 year + new open field opportunity for power- SiC value is very well understood and accepted- Multiple approaches to system solution – especially drivetrain- All OEM’s seeking differentiation & Differing regional approaches
Driving Factors- Increased Power density- Higher system efficiency- Range extension- Lower System cost
Supplier Imperatives- Proven reliability- Enough capacity- Product flexibility- Technology innovation to satisfy future developments - Component differentiation to allow system differentiation
A Samples and B samples are being developed NOW
The future is electric – and it starts with Wolfspeed