TIDUF33 june   2023

 

  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 Design Considerations
      1. 2.2.1 Current and Voltage Controller
      2. 2.2.2 High-Resolution PWM Generation
    3. 2.3 Highlighted Products
      1. 2.3.1 TMS320F280039
      2. 2.3.2 ADS131M08
  9. 3Hardware, Software, Testing Requirements, and Test Results
    1. 3.1 Hardware Requirements
    2. 3.2 Software Requirements
      1. 3.2.1 Opening the Project Inside Code Composer Studio
      2. 3.2.2 Project Structure
      3. 3.2.3 Software Flow Diagram
    3. 3.3 Test Setup
      1. 3.3.1 Hardware Setup to Tune the Current and Voltage Loops
      2. 3.3.2 Hardware Setup to Test Bidirectional Power Flow
      3. 3.3.3 Hardware Setup for Current and Voltage Calibration
    4. 3.4 Test Procedure
      1. 3.4.1 Lab Variables Definitions
      2. 3.4.2 Lab 1. Open-Loop Current Control Single Phase
        1. 3.4.2.1 Setting Software Options for Lab 1
        2. 3.4.2.2 Building and Loading the Project and Setting up Debug Environment
        3. 3.4.2.3 Running the Code
      3. 3.4.3 Lab 2. Closed Loop Current Control Single Phase
        1. 3.4.3.1 Setting Software Options for Lab 2
        2. 3.4.3.2 Building and Loading the Project and Setting up Debug Environment
        3. 3.4.3.3 Running the Code
        4. 3.4.3.4 Current Calibration
      4. 3.4.4 Lab 3. Closed Loop Current Control Dual Phase
        1. 3.4.4.1 Setting Software Options for Lab 3
        2. 3.4.4.2 Building and Loading the Project and Setting up Debug Environment
        3. 3.4.4.3 Running the Code
      5. 3.4.5 Lab 4. Closed Loop Current and Voltage Control
        1. 3.4.5.1 Setting Software Options for Lab 4
        2. 3.4.5.2 Building and Loading the Project and Setting up Debug Environment
        3. 3.4.5.3 Running the Code
        4. 3.4.5.4 Voltage Calibration
    5. 3.5 Test Results
      1. 3.5.1 Current Loop Load Regulation Error
      2. 3.5.2 Voltage Loop Load Regulation Error
      3. 3.5.3 Voltage Transition at No Load
      4. 3.5.4 Transient Response at Start-Up
      5. 3.5.5 Bidirectional Current Switching Time
  10. 4Design and Documentation Support
    1. 4.1 Design Files
      1. 4.1.1 Schematics
      2. 4.1.2 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

3.4.3.4 Current Calibration

  1. To run this lab, make sure the hardware is set up as shown in Section 3.3.3. The 2-points calibration method is used to calibrate gain and offset errors.
  2. To measure current, use an external precision resistor and a DMM, or you can use E-Load current readings. Alternatively, voltage across sense resistors on the TIDA-010087 boards can be used to measure the output current.
  3. Open the SYSCONFIG page and select under the Build Options section:
    • Select Lab 2: Closed Loop CC Single Phase for the Lab.
    • Change the Phase Enabled to Phase 1.
    • Set the Calibration Mode to 1 for current calibration.
    • Save the SYSCONFIG page, and run the code.
    • Open the Expression Window.
    • The output current is updated using BT2PH_userParam_V_I_ch1->ibatCal_pu parameter.
    • Set the BT2PH_enableRelay_bool to 1 to enable the output relay.
    • Set the BT2PH_userParam_V_I_ch1->en_bool = 1.
    • Set the BT2PH_userParam_V_I_ch1->ibatCal_pu to "0.05" and "0.3", and note the output current readings.
    • Update the actual output current readings in bt2ph_cal.h file.

    #define BT2PH_IBAT_ACTUAL_CH1_P1_A ((float32_t)2.6556)

    #define BT2PH_IBAT_ACTUAL_CH1_P2_A ((float32_t)16.163)

    #define BT2PH_IBAT_ACTUAL_CH2_P1_A ((float32_t)2.6556)

    #define BT2PH_IBAT_ACTUAL_CH2_P2_A ((float32_t)16.163)

    • Repeat the steps for phase 2 of the converter.
    • Set the Calibration Mode to 0 disable calibration.
  4. When using non-powerSuite version of the project, Build Settings are directly modified in solution_settings.h file.

    #define LAB_NUMBER (2)

    #define PHASE_NUMBER (1)

    #define CALIBRATION_ENABLED (true)

    #define CALIBRATION_MODE (1)

GUID-20230628-SS0I-HGX6-QSZP-8ZG3L3DSWXBX-low.png Figure 3-20 Build Options for Current Calibration