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15kW Vienna-style three-phase rectifier with low-cost mixed-signal control for power factor correction

STDES-VIENNARECT

Overview

As a complete solution, this reference design targets high-power three-phase AC/DC rectification applications based on Vienna topology. The main feature is mixed signal control. The STNRG388A controller provides digital output voltage regulation, and the dedicated analog circuit provides high-bandwidth continuous conduction mode (CCM) current regulation to maximize total harmonic distortion (THD) and power factor (PF).

The high switching frequency and multi-level structure based on SiC MOSFETs (70 kHz) enable efficiencies of nearly 99% while optimizing passive components in terms of size and cost.
This high efficiency Vienna rectifier is designed for several end applications requiring high PF and low THD, such as electric vehicles (EV), industrial battery chargers and industrial equipment

Main features

Three-phase three-level bidirectional AC/DC converter
- Rated nominal output DC voltage: 800 V _DC
- Rated nominal input AC voltage: 400 V _AC /50 Hz
- Nominal output power AC/DC: 15kW
- Power factor, PF > 0.99
- Inrush current control and soft start
- THD is less than 5% during normal operation
Power devices based on SiC MOSFETs and diodes:
- High frequency operation (70 kHz)
- High peak efficiency is greater than 98%
- Passive component weight and size reduction
Control device using programmable STNRG388A digital controller
- Low cost mixed signal control
Overcurrent and overvoltage protection

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:2025-05-31 08:32:10

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