fish001

15kW, three-phase, three-level active front-end (AFE) bidirectional converter for industrial and electric vehicle DC fast charging applications

STDES-PFCBIDIR

Overview

This reference design provides a complete three-phase AC/DC and DC/AC (800 VDC to 400 VAC) power conversion solution based on a digital platform.

It is ideally suited for high-power charging stations, industrial battery chargers, and the active front-end (AFE) stage of UPS. High-frequency applications and multi-level topologies of SiC MOSFETs can achieve nearly 99% efficiency while optimizing passive component size and cost.

Main features

Three-phase three-level bidirectional AC/DC converter:
- Rated nominal DC voltage: 800 V _DC
- Rated nominal AC voltage: 400 V _AC @ 50 Hz
- Nominal power: 15 kW
AC to DC rectification mode:
- Power factor control, PF > 0.99
- Inrush current control and soft start
DC to AC inverter mode:
- Active and reactive power control
- Integrated grid connection solution
Power devices based on SiC MOSFETs
- High frequency operation (100 kHz)
- Efficient, η = 99%
- Reduce passive component weight and size
Control part based on STM32G474RE microcontroller:
- Fully compatible with other STDES three-phase power converters
- 4 integrated high-performance operational amplifiers
- Control and monitoring interfaces: SWIM, UART, I²C, DACs
- 64-pin digital power connector
- Overcurrent and overvoltage protection
- Configurable topology (Level 2 - 3)

Design Files

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It is your responsibility to test the circuit yourself and determine its suitability for you. EEWorld will not be liable for direct, indirect, special, incidental, consequential or punitive damages arising from any cause or anything connected to any reference design used.

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Update:2025-06-23 13:00:27

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