Silicon Carbide (SiC) Dual Inverter Unit

1. The Evolution to Wide-Bandgap Silicon Carbide

Traditional electric vehicle architectures rely on Insulated Gate Bipolar Transistors (IGBTs) fabricated from standard silicon. In hypercar applications operating at extreme electrical loads, conventional silicon semiconductors experience severe thermal throttling and switching energy loss. Silicon Carbide (SiC) MOSFETs feature a wide energy bandgap that enables higher operating voltages, faster electron velocity, and triple the thermal conductivity of standard silicon.

2. 100 kHz High-Frequency Pulse Modulation

Operating at a switching frequency of 100 kHz (compared to 8-16 kHz in standard passenger EVs), SiC dual inverter units eliminate motor harmonics and reduce current ripple. This rapid switching allows engineers to dramatically shrink internal magnetics and output filter sizes, resulting in a dual-inverter power density exceeding 45 kW per kilogram.

3. Direct Dielectric Immersion Fluid Cooling

To support sustained high-frequency switching during track conditions without thermal derating, the SiC power module substrate is encapsulated inside a sealed cooling housing filled with synthetic dielectric fluid. Direct fluid contact across the MOSFET copper trace leads transfers heat away from semiconductor junctions instantaneously.

4. High-Power Regenerative Deceleration Control

During maximum braking events, the dual SiC inverter functions in reverse mode as a high-speed rectifier, harvesting up to 300 kW of kinetic power back into the ultra-high-C battery pack within fractions of a second. This seamless bidirectional energy flow minimizes mechanical brake wear and maintains optimum vehicle stability during corner entry.