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  • 11-kW, Bidirectional Three-Phase Three-Level (T-type) Inverter and PFC Reference Design

    • TIDUE53J March   2018  – February 2025 TMS320F28P550SG , TMS320F28P550SJ , TMS320F28P559SJ-Q1

       

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  • 11-kW, Bidirectional Three-Phase Three-Level (T-type) Inverter and PFC Reference Design
  1.   1
  2.   Description
  3.   Resources
  4.   Features
  5.   Applications
  6.   6
  7. 1System Description
    1. 1.1 Key System Specifications
  8. 2System Overview
    1. 2.1 Block Diagram
    2. 2.2 Highlighted Products
      1. 2.2.1  UCC21710
      2. 2.2.2  UCC5350
      3. 2.2.3  TMS320F28379D
      4. 2.2.4  AMC3306M05
      5. 2.2.5  OPA4388
      6. 2.2.6  TMCS1123
      7. 2.2.7  AMC0330R
      8. 2.2.8  AMC0381D
      9. 2.2.9  UCC14341
      10. 2.2.10 UCC33421
    3. 2.3 System Design Theory
      1. 2.3.1 Three-Phase T-Type Inverter
        1. 2.3.1.1 Architecture Overview
        2. 2.3.1.2 LCL Filter Design
        3. 2.3.1.3 Inductor Design
        4. 2.3.1.4 SiC MOSFETs Selection
        5. 2.3.1.5 Loss Estimations
      2. 2.3.2 Voltage Sensing
      3. 2.3.3 Current Sensing
      4. 2.3.4 System Auxiliary Power Supply
      5. 2.3.5 Gate Drivers
        1. 2.3.5.1 1200-V SiC MOSFETs
        2. 2.3.5.2 650-V SiC MOSFETs
        3. 2.3.5.3 Gate Driver Bias Supply
      6. 2.3.6 Control Design
        1. 2.3.6.1 Current Loop Design
        2. 2.3.6.2 PFC DC Bus Voltage Regulation Loop Design
  9. 3Hardware, Software, Testing Requirements, and Test Results
    1. 3.1 Required Hardware and Software
      1. 3.1.1 Hardware
        1. 3.1.1.1 Test Hardware Required
        2. 3.1.1.2 Microcontroller Resources Used on the Design (TMS320F28379D)
        3. 3.1.1.3 F28377D, F28379D Control-Card Settings
        4. 3.1.1.4 Microcontroller Resources Used on the Design (TMS320F280039C)
      2. 3.1.2 Software
        1. 3.1.2.1 Getting Started With Firmware
          1. 3.1.2.1.1 Opening the CCS project
          2. 3.1.2.1.2 Digital Power SDK Software Architecture
          3. 3.1.2.1.3 Interrupts and Lab Structure
          4. 3.1.2.1.4 Building, Loading, and Debugging the Firmware
          5. 3.1.2.1.5 CPU Loading
        2. 3.1.2.2 Protection Scheme
        3. 3.1.2.3 PWM Switching Scheme
        4. 3.1.2.4 ADC Loading
    2. 3.2 Testing and Results
      1. 3.2.1 Lab 1
      2. 3.2.2 Testing Inverter Operation
        1. 3.2.2.1 Lab 2
        2. 3.2.2.2 Lab 3
        3. 3.2.2.3 Lab 4
      3. 3.2.3 Testing PFC Operation
        1. 3.2.3.1 Lab 5
        2. 3.2.3.2 Lab 6
        3. 3.2.3.3 Lab 7
      4. 3.2.4 Test Setup for Efficiency
      5. 3.2.5 Test Results
        1. 3.2.5.1 PFC Mode
          1. 3.2.5.1.1 PFC Start-Up – 230 VRMS, 400 VL-L AC Voltage
          2. 3.2.5.1.2 Steady State Results - PFC Mode
          3. 3.2.5.1.3 Efficiency, THD, and Power Factor Results, 60 Hz – PFC Mode
          4. 3.2.5.1.4 Transient Test With Step Load Change
        2. 3.2.5.2 Inverter Mode
  10. 4Design Files
    1. 4.1 Schematics
    2. 4.2 Bill of Materials
    3. 4.3 PCB Layout Recommendations
      1. 4.3.1 Layout Prints
    4. 4.4 Altium Project
    5. 4.5 Gerber Files
    6. 4.6 Assembly Drawings
  11. 5Trademarks
  12. 6About the Authors
  13. 7Revision History
  14. IMPORTANT NOTICE
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Design Guide

11-kW, Bidirectional Three-Phase Three-Level (T-type) Inverter and PFC Reference Design

Description

This reference design provides an overview on how to implement a bidirectional three-level, three-phase, SiC-based active front end (AFE) inverter and power factor correction (PFC) stage. The design uses switching frequency up to 90 kHz and an LCL output filter to reduce the size of the magnetics. A peak efficiency of 98.6% is achieved. The design shows how to implement a complete three-phase AFE control in the DQ domain. This bidirectional converter enables both DC fast charging and vehicle-to-grid (V2G) applications.

Resources

TIDA-01606 Design Folder
TMS320F28379D, TMS320F280039C Product Folder
UCC21710, UCC5350, AMC3306M05 Product Folder
TMCS1123, AMC0330R, AMC0381D Product Folder
OPA4388, OPA397, UCC14341B Product Folder
UCC33421, C2000WARE Product Folder
TMDSCNCD28379D Tool Folder
TMDSCNCD280039C Tool Folder
TIDA-01606 Ask our TI E2E™ support experts

Features

  • Rated nominal and maximum input voltage at
    800-V and 900-V DC, maximum power 11-kW,
    11-kVA at 400-VL-L AC, 50 Hz or 60 Hz
  • Compact output LCL filter with switching frequency of 90 kHz
  • < 2.5% output current Total Harmonic Distortion (THD) at full load
  • Isolated driver UCC21710 with reinforced isolation for driving high-voltage SiC MOSFET and UCC5350 for driving middle SiC MOSFET
  • Isolated current sensing using TMCS1123 for load current control and monitoring
  • TMS320F28379D and TMS320F280039C control cards for digital control with Trigonometric Math Unit (TMU) to accelerate Phase-Locked Loop (PLL) computation, comparator sub-system for protection implementation and Control Law Accelerator (CLA) to offload the control loops to the coprocessor

 
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