STDES-VRECTFD

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15 kW, three-level, three-phase Vienna rectifier with digital control for power factor correction

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Overview

Product overview

Description

Description

The STDES-VRECTFD reference design is a complete solution for high-power three-phase AC/DC rectifier applications based on the Vienna topology.

It features full digital control through the STM32G474RET3 MCU and provides both digital output voltage regulation and continuous conduction mode (CCM) current regulation for the maximum power quality related to total harmonic distortion (THD) and power factor (PF).

The high switching frequency of the SCTW35N65G2V SiC MOSFETs (70 kHz) and the multilevel structure allow a nearly 99% efficiency as well as the optimization of passive power components in terms of size and cost.

This high efficiency Vienna rectifier is designed for several end applications, such as electric vehicle (EV) and industrial battery chargers, and industrial equipment that requires a very high PF and a low THD.

The STDES-VRECTFD is a fully assembled kit developed for performance evaluation only, not available for sale.

  • All features

    • Three-phase, three-level AC-DC power converter
      • Nominal rate for DC voltage: 800 VDC
      • Nominal rate for AC voltage: 400 VAC at 50 Hz
      • Maximum power: 15 kW
      • Power factor: >0.99
      • Inrush current control and soft start-up
      • THD lower than 5% at nominal operation
    • Power section based on SiC MOSFETs and SiC diodes:
      • High frequency operation (70 kHz)
      • High efficiency: >98%
      • Passive element weight and size reduction
    • Control section based on the STM32G474RET3 microcontroller:
      • Control and monitoring interfaces: SWD–UART, I²C, and DACs
      • 64-pin digital power connector
      • LED status as UI
      • Four integrated high-performance op-amps for additional features

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The current status of a product:
Active: Product is in volume production
Evaluation: Product is under characterization. Limited Engineering samples available
Preview: Product is in design stage
Target: Product is in design feasibility stage.No commitment taken to produce
Proposal: Marketing proposal for customer feedback.No commitment taken to design or produce
NRND: Not Recommended for New Design.Product is in volume production only to support customers ongoing production.Marketing description of the package type.Compliancy of the device with industry requirement domains (IRD)The RoHS status of a product:
ECOPACK 1: Initial grade to identify European RoHS compliant products.
ECOPACK 2: New grade to identify brominated chlorinated and antimony oxide flame retardant free products.
ECOPACK 3: Halogen free RoHS exemptions free products.
(*): ECOPACK 2 version available upon request.
(**): Some versions still existing in ECOPACK 1 or not compliant.Compliancy with WEEE Directive (2012/19/EU)The current status of a product:
Active: Product is in volume production
Evaluation: Product is under characterization. Limited Engineering samples available
Preview: Product is in design stage
Target: Product is in design feasibility stage.No commitment taken to produce
Proposal: Marketing proposal for customer feedback.No commitment taken to design or produce
NRND: Not Recommended for New Design.Product is in volume production only to support customers ongoing production.Budgetary PriceMain country of assembly or fabrication of the product.ECCNs are five character alpha-numeric designations used on the Commerce Control List to identify dual-use items for export control purposes. ECCNs are five character alpha-numeric designations used on the Commerce Control List to identify dual-use items for export control purposes.