TIDUFB1 December   2024

 

  1.   1
  2.   Description
  3.   Resources
  4.   Features
  5.   Applications
  6.   6
  7. 1System Description
    1. 1.1 Terminology
    2. 1.2 Key System Specifications
  8. 2System Overview
    1. 2.1 Block Diagram
    2. 2.2 Design Considerations
      1. 2.2.1 Control System Design Theory
        1. 2.2.1.1 PWM Modulation
        2. 2.2.1.2 Current Loop Model
        3. 2.2.1.3 DC Bus Regulation Loop
        4. 2.2.1.4 DC Voltage Balance Controller
    3. 2.3 Highlighted Products
      1. 2.3.1 TMS320F280013x
      2. 2.3.2 UCC5350
      3. 2.3.3 AMC1350
      4. 2.3.4 TMCS1123
      5. 2.3.5 UCC28750
      6. 2.3.6 LM25180
      7. 2.3.7 ISOTMP35
      8. 2.3.8 TLV76133
      9. 2.3.9 TLV9062
    4. 2.4 Hardware Design
      1. 2.4.1  Inductor Design
      2. 2.4.2  Bus Capacitor Selection
      3. 2.4.3  Input AC Voltage Sensing
      4. 2.4.4  Output DCBUS Voltage Sensing
      5. 2.4.5  Auxiliary Power Supply
      6. 2.4.6  Isolated Power Supply
      7. 2.4.7  Inductor Current Sensing
      8. 2.4.8  Gate Driver
      9. 2.4.9  Isolated Temperature Sensing
      10. 2.4.10 Overcurrent, Overvoltage Protection (CMPSS)
  9. 3Hardware, Software, Testing Requirements, and Test Results
    1. 3.1 Hardware Requirements
      1. 3.1.1 Getting Started Hardware
        1. 3.1.1.1 Board Overview
        2. 3.1.1.2 Test Equipment
    2. 3.2 Software Requirements
      1. 3.2.1 Getting Started GUI
        1. 3.2.1.1 Test Setup
        2. 3.2.1.2 Overview of a GUI Software
        3. 3.2.1.3 Procedures of Test With GUI
      2. 3.2.2 Getting Started Firmware
        1. 3.2.2.1 Opening the Project Inside Code Composer Studio™
        2. 3.2.2.2 Project Structure
        3. 3.2.2.3 Test Setup
        4. 3.2.2.4 Running Project
          1. 3.2.2.4.1 INCR_BUILD 1: Open Loop
            1. 3.2.2.4.1.1 Setting, Building, and Loading the Project
            2. 3.2.2.4.1.2 Setup Debug Environment Windows
            3. 3.2.2.4.1.3 Using Real-Time Emulation
            4. 3.2.2.4.1.4 Running Code (Build 1)
          2. 3.2.2.4.2 INCR_BUILD 2: Closed Current Loop
            1. 3.2.2.4.2.1 Running Code (Build 2)
            2. 3.2.2.4.2.2 Building and Loading the Project and Setting Up Debug
          3. 3.2.2.4.3 INCR_BUILD 3: Closed Voltage and Current Loop
            1. 3.2.2.4.3.1 Building and Loading the Project and Setting Up Debug
            2. 3.2.2.4.3.2 Running Code (Build 3)
          4. 3.2.2.4.4 INCR_BUILD 4: Closed Balance, Voltage, and Current Loop
            1. 3.2.2.4.4.1 Building and Loading the Project and Setting Up Debug
            2. 3.2.2.4.4.2 Running Code (Build 4)
    3. 3.3 Test Results
      1. 3.3.1  IGBT Gate Rising and Falling Time
      2. 3.3.2  Power On Sequence
      3. 3.3.3  PFC Started by GUI
      4. 3.3.4  Zero Crossing Under 380VAC, 9kW
      5. 3.3.5  Current Ripple Under 380VAC,10kW
      6. 3.3.6  10kW Load Test With Grid Power
      7. 3.3.7  9kW Load Test With AC Power Source
      8. 3.3.8  Power Analyzer Results
      9. 3.3.9  Thermal Performance
      10. 3.3.10 Voltage Short Interrupt Test
      11. 3.3.11 Efficiency, iTHD, and Power Factor Results
  10. 4Design and Documentation Support
    1. 4.1 Design Files
      1. 4.1.1 Schematics
      2. 4.1.2 Bill of Material (BOM)
    2. 4.2 Tools and Software
    3. 4.3 Documentation Support
    4. 4.4 Support Resources
    5. 4.5 Trademarks
  11. 5About the Author
Running Code (Build 3)
  1. Run the project by clicking the TIDA-010257 button.
  2. Raise the input AC voltage to 120VRMS VL-N or 208VRMS VL-L, 50Hz.
  3. The DC voltage reference is set by the vBusRef variable. This value is set to as 1.0, which corresponds to 420V for this design.
  4. Clear the trip by setting the clearTrip variable to 1. The bus voltage then rises to be 420V.
  5. Closed loop operation can be verified by comparing the vBusRef and vBusMeas in the expressions window as Figure 3-24 shows.
    TIDA-010257 Build Level 3:
                            Expressions Window With Vref = 1.0 Figure 3-24 Build Level 3: Expressions Window With Vref = 1.0
  6. Figure 3-25 shows the input voltage and current waveforms.
    TIDA-010257 Build Level 3: Scope
                            Capture Ia and Va (120VRMS L-N) With Vref = 1.0
    • CH1 (Blue): DCBUS output voltage
    • CH2 (Light blue): AC input phase A voltage
    • CH3 (Pink): IGBT gate voltage
    • CH4 (Green): AC Input phase A current
    Figure 3-25 Build Level 3: Scope Capture Ia and Va (120VRMS L-N) With Vref = 1.0
  7. Now raise vBusRef to 1.5 step by step, the bus voltage is raised to 630V, the vBusRef and vBusMeas variables appear in the Expressions window as Figure 3-26 shows.
    TIDA-010257 Build Level 3:
                            Expressions Window With Vref = 1.5 Figure 3-26 Build Level 3: Expressions Window With Vref = 1.5
    Figure 3-25 shows the input voltage and current waveforms.
    TIDA-010257 Build Level 3: Scope
                            Capture Ia and Va(120VRMS L-N) With Vref=1.5
    • CH1 (Blue): DCBUS output voltage
    • CH2 (Light blue): AC input phase A voltage
    • CH3 (Pink): IGBT gate voltage
    • CH4 (Green): AC Input phase A current
    Figure 3-27 Build Level 3: Scope Capture Ia and Va(120VRMS L-N) With Vref=1.5
  8. To bring the system to a safe stop, bring the input AC voltage down to zero, observe the guiVBus variable comes down to zero as well.
  9. Fully halting the MCU when in real-time mode is a two-step process. First halt the processor by using the Halt button on the toolbar (TIDA-010257 ) or by using Target > Halt. Next, take the MCU out of real-time mode by clicking on the TIDA-010257 board. Finally, reset the MCU (TIDA-010257 ).
  10. Close the CCS debug session by clicking on Terminate Debug Session (Target > Terminate all).
    TIDA-010257