Designing a high-power bidirectional AC/DC power supply using SiC FETs
High-power bidirectional AC/DC power supplies are widely used as uninterruptible power supplies (UPS), energy storage systems (ESS) and onboard chargers (OBC) with vehicle-to-grid (V2G) capability. Compared to the traditional approach V using one unidirectional rectifier and one unidirectional inverter to achieve a bidirectional energy flow ¡V a bidirectional rectifier can provide advantages such as smaller size, higher power density and higher efficiency. This paper reviews topologies, design considerations and design challenges of high power bidirectional AC/DC power supplies. Resolving these challenges entails a deep dive into the total bidirectional AC/DC rectifier solution, including a totem-pole bridgeless PFC solution and an isolated capacitor-inductor inductor-capacitor series resonant dual active bridge converter (CLLLC-SRes-DAB) solution using silicon carbide (SiC) MOSFETs and the gate drivers. Together, these two designs form a high-density, high-efficiency 6.6 kW bidirectional AC/DC power supply.
Why should I take this training?
- High-density, high-efficiency design practices
- SiC devices are becoming more main stream
- Introduction to high power topologies that can be leveraged in other markets
- Understanding an emerging market and technologies that go with it
What will I learn?
- Bidirectional topology selection and tradeoffs
- Basics of SiC technology and use
- Real-world example with verified data
