Automotive Certified SiC Energy Module For EV Traction Inverters

Primarily based on a silicon carbide trench MOSFET construction, the system permits inverter design to attain excessive energy and small battery measurement

To allow optimised options for traction inverters in electrical automobiles (EV), Infineon Applied sciences AG has launched a brand new automotive energy module that’s based mostly on the automotive CoolSiC trench MOSFET expertise for high-power density and high-performance purposes. The HybridPACK Drive CoolSiC, a full-bridge module with 1200 V blocking voltage, provides excessive effectivity in inverters with longer ranges and decrease battery prices, significantly for automobiles with 800 V battery techniques and bigger battery capability.

In 2017, the HybridPACK Drive with silicon EDT2 expertise was first launched and supplied a scalable energy vary of 100 kW to 180 kW throughout the 750 V and 1200 V class – delivering excessive effectivity on a real-world driving cycle. 

The brand new CoolSiC model relies on a silicon carbide trench MOSFET construction. In comparison with planar constructions, the ditch construction permits a better cell density, ensuing within the best-in-class determine of benefit. Due to this fact, trench MOSFETs could be operated at decrease gate-oxide discipline strengths, leading to elevated reliability.

The facility module provides a simple upscale path from silicon to silicon carbide with the identical footprint, permitting the inverter design to attain greater energy of as much as 250 kW within the 1200 V class, larger driving vary, smaller battery measurement and optimised system measurement and value. To supply an optimum cost-performance ratio for various energy ranges, this product is on the market in two variations with completely different chip counts, leading to both a 400 A or 200 A DC score model within the 1200 V class. 

CoolSiC Automotive MOSFET expertise

The primary-generation of CoolSiC automotive MOSFET expertise is optimised to be used in traction inverters, with a give attention to attaining the bottom conduction losses, particularly below partial load situations. Mixed with low switching losses of silicon carbide MOSFETs, an effectivity acquire in inverter operation is obtained (in comparison with silicon IGBTs).

Along with optimised efficiency, reliability is one other space of emphasis. Automotive CoolSiC MOSFETs are designed and examined to attain brief circuit robustness and a excessive diploma of cosmic ray and gate-oxide robustness, which is essential for designing environment friendly and dependable automotive traction inverters and different excessive voltage purposes. The HybridPACK Drive CoolSiC energy module is totally certified to the AQG324 norm for automotive energy modules.

“The 800 V system of the Electrical World Modular Platform (E-GMP) represents the technological foundation for the following era of electrical automobiles with lowered charging time”, stated Dr Jin-Hwan Jung, Head of the Electrification Improvement Staff at Hyundai Motor Group. “Through the use of traction inverters based mostly on Infineon’s CoolSiC energy module, we had been capable of enhance the vary of the automobile by greater than 5 per cent due to effectivity features ensuing from the decrease losses of this SiC answer in comparison with Si-based answer.”

“The automotive e-mobility market has develop into extremely dynamic, paving the bottom for concepts and innovation”, stated Mark Münzer, Head of Innovation and Rising Know-how at Infineon. “As the worth of SiC units considerably decreases, the commercialization of SiC options will speed up, leading to extra cost-efficient platforms adopting SiC expertise to enhance the vary of electrical automobiles.”

The brand new HybridPACK Drive CoolSiC is in manufacturing now and will probably be out there beginning June 2021. 

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