SiC HPD (High Power Density) Modules Designed for New Energy Vehicle Motor Drive by SHY-SEMI

• When driving an electric vehicle, the motor controller converts the direct current (DC) from the power battery into alternating current (AC) (a process known as inversion), enabling the motor to operate. The motor converts electrical energy into mechanical energy, which then powers the car’s wheels through the transmission system (primarily the reducer). Conversely, the process of converting the wheels' mechanical energy back into stored electrical energy in the battery is called regenerative braking.

The motor drive system is the heart of an electric vehicle, determining driving performance and energy efficiency. It is also the part with the highest usage and value of SiC power devices. Our company recommends using SiC HPD (High Power Density) modules, which offer the following advantages:

• High Efficiency: Thanks to the high thermal conductivity and low energy loss characteristics of silicon carbide (SiC), SiC HPD modules achieve higher efficiency in energy conversion, significantly reducing energy waste.
• High Power Density: With a wide bandgap and high electron saturation drift velocity, SiC materials enable SiC HPD modules to deliver higher power output within a smaller volume, helping to reduce the size and weight of equipment.
• Fast Switching: SiC materials possess a high critical breakdown electric field and thermal conductivity, allowing faster switching speeds. This improves the dynamic response and efficiency of power electronic systems.
• High temperature operating capacity: SiC materials have superior thermal conductivity and low thermal expansion coefficients, ensuring stable operation in high-temperature environments, enhancing device reliability and stability.
• Energy Saving and Environmental Protection: With low energy consumption and high efficiency, SiC HPD modules help reduce energy usage and carbon emissions, aligning with green environmental concept.
• Simplified Circuit Design: The wide bandgap and high critical breakdown electric field of SiC materials reduce the need for components like capacitors and inductors in the circuit, simplifying the circuit design.
• Cost Reduction: Due to the high efficiency, power density and temperature operation capabilities, SiC HPD modules reduce the overall system size, weightand maintenance costs while improving system performance.
• In summary, the advantages of SiC HPD modules lie in high efficiency, high power density, fast switching, high-temperature operation, energy saving, simplified circuit designand cost reduction.