TIDT367 December   2023

 

  1.   1
  2.   Description
  3.   Features
  4.   Applications
  5. 1Test Prerequisites
    1. 1.1 Voltage and Current Requirements
    2. 1.2 Required Equipment
    3. 1.3 Test Setup
      1. 1.3.1 Hardware Setup
      2. 1.3.2 Software Setup
    4. 1.4 Running the Code for Different Labs
      1. 1.4.1 Lab 1. Primary to Secondary Power Flow, Open Loop Check PWM Driver
      2. 1.4.2 Lab 2. Primary to Secondary Power Flow, Open Loop CheckPWM Driver and ADC With Protection
      3. 1.4.3 Lab 3. Primary to Secondary Power Flow, Closed Voltage Loop Check
      4. 1.4.4 Lab 4. Primary to Secondary Power Flow, Closed Current Loop Check
      5. 1.4.5 Lab 6. Secondary to Primary Power Flow, Open Loop Check PWM Driver
      6. 1.4.6 Lab 7. Secondary to Primary Power Flow, Open Loop Check PWM Driver and ADC With Protection
      7. 1.4.7 Lab 8. Secondary to Primary Power Flow, Closed Voltage Loop Check
  6. 2Testing and Results
    1. 2.1 Efficiency Graphs
    2. 2.2 Efficiency Data
    3. 2.3 Thermal Images
    4. 2.4 Bode Plots
  7. 3Waveforms
    1. 3.1 Switching
    2. 3.2 Load Transients
    3. 3.3 Start-Up Sequence
    4. 3.4 Dynamic Response
    5. 3.5 Mode Transition

1.4.4 Lab 4. Primary to Secondary Power Flow, Closed Current Loop Check

In this lab, the output current control loop is closed. In this Lab, using the electrical load(constant voltage mode) to emulate the battery connection on secondary side.

  1. Run the project by clicking the Resume button in the Tool Bar
  2. Set the CLLLC_iSecRef_Amps below 5 A during start up
  3. Increase the input PRIM DC voltage from 0 V to 400 V
  4. Clear the trip by writing "1" to the CLLLC_start variable in the Watch window as shown in Figure 1-4, this closes the voltage loop and the converter performs soft-start until the output voltage ramps up to 48 V
  5. Next, test the close loop operation by varying CLLLC_iSecRef_Amps in the Watch window