LTspicePowerSim

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.

Features✨

• 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.

Symbols🧩

Example Screen Shot🖼️

Type-II Compensator (FRA)

Peak Current Mode Buck Converter (Current-Mode Control)

Peak Current Mode Boost Converter (Current-Mode Control)

CCCV Buck Converter for Battery Charging (CC/CV control)

Boundary Counduction Mode Flyback Converter (BCM / CrCM)

Phase-Shift Full-Bridge Converter (PSFB with ZVS)

LLC Resonant Converter (Frequency Control)

Single-Phase Totem-Pole PFC (2-Phase Interleaved)

Single-Phase 4-Level Totem-Pole PFC

Three-Phase Totem-Pole PFC (VOC + SVPWM Control)

Discrete-Time PID Controller (Z-Domain FRA)

Discrete-Time Voltage-Mode Buck Converter (Digital Control)

Two-Phase Stepper Motor Control using FOC

Nerural-Network Controlled Buck Converter using pytorch2ltspice

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More Examples Available!
➡️ Go to Full Gallery 🖼️

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Getting Started💡

Prerequisites

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.

Model Installation (Windows)

• 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.

Model Installation (macOS)

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

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

• Replace <username> with your username.

Tips💡

• 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.<br> 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.