Infineon Launches CoolSiC Power Modules for Greener and Quieter Trains in Traction Applications

May 12, 2023, in order to achieve global climate goals, the transportation sector must transition to more environmentally friendly vehicles, such as energy-efficient electric trains. However, train operations come with demanding conditions that require frequent acceleration and braking, as well as reliable performance over a long lifespan. To meet these requirements, high-power density, reliability, and quality energy-saving traction applications are essential.

Infineon Technologies AG, a leading electronic components company, has introduced two new products, FF2000UXTR33T2M1 and FF2600UXTR33T2M1, as part of its CoolSiC™ power module portfolio. These power modules utilize the newly developed 3.3 kV CoolSiC MOSFET and Infineon's .XT interconnection technology, packaged as XHP™ 2, specifically tailored for traction applications.

These devices are designed for demanding applications like traction and were showcased at the PCIM Europe 2023 exhibition held in Nuremberg, Germany. Dr. Peter Wawer, President of Infineon's Zero Carbon Industrial Power business segment, stated, "To achieve sustainable transportation, railway technology needs innovative semiconductor solutions specifically designed for these applications. With low switching losses and higher switching frequencies, Infineon's new silicon carbide products contribute to creating greener and quieter trains. These features are crucial for future trains."

In addition to efficient and reliable silicon carbide (SiC) chips, power modules for traction drives require high-speed switching-compatible packaging and interconnection technologies that extend device lifespan. Infineon's new power modules offer the following features: CoolSiC MOSFET chips with integrated body diodes in the Infineon XHP 2 package, enabling low switching losses while maintaining high reliability and power density.

The XHP 2 package also features low stray inductance, symmetrical and scalable design, and high current capabilities. The FF2000UXTR33T2M1 module has a drain-source on-resistance of 2.0 mΩ, while the FF2600UXTR33T2M1 module has a drain-source on-resistance of 2.6 mΩ. Despite the stringent requirements of train operations, Infineon's .XT interconnection technology enhances power cycling capability.

Compared to traditional solutions, Infineon's CoolSiC power modules can reduce the total energy consumption of train motors and inverters by 10%. Additionally, more compact and lightweight inverters, along with simplified cooling systems, will benefit train operators. These new products not only contribute to Infineon Technologies, traction manufacturers, and railway service operators in achieving decarbonization but also reduce operational noise during train travel, benefiting residents along the routes. In 2022, Infineon's SiC-based XHP 2 power modules were successfully tested in a joint field test project with Siemens Mobility and Munich Public Utilities (SWM) for tram systems. The tests showed that power semiconductors based on SiC significantly reduced engine operating noise.