LTspicePowerSim is a Simulink-like power electronics simulation environment built on LTspice. It provides a library of reusable circuit-level models together with extensive example circuits, making power electronics simulation easier and more accessible for engineers and researchers.

• Optimized Models for Convergence: Includes circuit models specifically designed to enhance simulation convergence.
• Transparent Model Definitions: All models are defined using LTspice schematic files (.asc), allowing users to view and edit the circuits directly as needed.
• Extensive example circuits: A wide range of example circuits covering DC-DC converters, resonant converters, Totem-Pole PFC, motor drivers, battery charger, and digitally controlled power stages.

More Examples Available!
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To use LTspicePowerSim, you need to have the following installed:

1. LTspice – A high-performance SPICE simulation software.
2. Windows or macOS – The steps below cover installation for both operating systems.

• Copy the contents of the sym\PowerSim folder from this repository to:

  For LTspice 24.0.12 or earler
  C:\Users\<username>\AppData\Local\LTspice\lib\sym\PowerSim
  
  For LTspice 24.1.0 and up
  C:\Users\<username>\Documents\LTspice\lib\sym\PowerSim
  

• Replace <username> with your username.

• Or you can use following batch files in bat folders.

  File Name	Description
  install.bat	Copies the model files into the LTspice folder.
  clean.bat	Removes all copied files from the LTspice folder.
  open_install_folder.bat	Opens the LTspice directory where the files are installed.

  Note:
  Updated batch files to follow 24.1.0 onwards while keeping old ones in "old(-24.0.12)" folder.

• For LTspice 24.1.0 and up you also need to set the path for the PowerSim folder to be able to open the example files correctly. Just go to Tools > Setting and add the path as shown below.

• Copy the contents of the sym\PowerSim folder from this repository to:

  /Users/<username>/Library/Application　Support/LTspice/lib/
  

• Replace <username> with your username.

• Simulation Convergence
  • In most cases, simulations run stably with:

    .options solver="norm"       <-- Other option: "alt"
    .options method="gear"       <-- Other option:"trap", "modtrap"
    

    Try other option if simulation didn't converge.
    The .options solver directive is available starting from LTspice v24.1.0.
  • If convergence issues still occur, add:

    .options debugtran
    

    This helps identify which devices or nodes are causing difficulties in convergence.
    The .options debugtran directive is also supported from v24.1.0.