CRD-22AD12N

22kW Bi-directional High Efficiency Active Front End (AFE) Converter

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DOCUMENTATION ONLY – NO HARDWARE

This reference design demonstrates the application of Wolfspeed’s 1200V C3M SiC MOSFETs to create a 22kW three phase bidirectional active front end (AFE) converter for electric vehicle (EV) on-board charger (OBC), off-board fast charging, and other industrial applications such as energy storage systems and three phase PFC power supplies. This design operates as a standalone AC/DC converter and is compatible with both single-phase and three-phase inputs. It has two operating modes: power factor correction (PFC) mode and inverter mode. In both modes, the DC bus voltage is flexible to demonstrate operation under a range of conditions. The use of 1200V C3M 32mOhm SiC MOSFETs in a TO- 247-4 package provides the best figure of merit (FOM) and reduces switching loss and cross talk.

The design accomplishes

• Peak efficiencies of 98.5% in both PFC and inverter mode
• Power density of 4.6kW/L

This reference design is offered as a comprehensive design package which can be used as a starting point for new SiC designs.

Specifications
PFC Mode

• Three Phase Input Voltage: 305Vrms --> 450Vrms line-line 50/60Hz Max current: 32A Output DC Voltage: 650V --> 900V, Max power 22kW
• Single Phase Input Voltage: 180Vrms --> 264Vrms 50/60Hz Max current: 32A Output DC Voltage: 380V --> 900V, Max power 6.6kW

Inverter Mode

• DC Input Voltage: 350V --> 760V DC Max current: 20A
• AC Output Voltage: 230Vrms 50Hz single phase Max power: 6.6kW

• Switching Frequency: 45kHz
• Tooled heatsink to simulate cooling plate
• CAN interface

Applications

• EV On-Board Charger
• EV Off-Board Fast Charging
• Industrial Fast Charging
• Energy Storage Systems