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Learn about DSIM
DSIM is a simulation software designed for power electronic systems. Its novel Discrete-State Event-Driven (DSED) simulation technique was specifically designed to address systems with large numbers of switches, high switching frequencies, and wide variations of time constants (for example, small time constants for switching transients in the scale of nanoseconds and large time constants for system simulations in the scale of seconds or minutes). DSIM simulations run at record-breaking speeds that are hundreds or thousands of times faster than existing commercial simulation tools. With DSIM, it is now possible to perform analysis and studies that are otherwise very time consuming or impossible to do before, greatly accelerating the development time and reducing the development cost. DSIM is ideally suited for applications in power system, power transmission, motor drive, industrial power supply, renewable energy source, aerospace and other applications.
Fast Simulation Speed
With the novel Discrete-State Event-Driven (DSED) solver, DSIM is the fastest power electronics simulation tool on the market.
DSIM offers hundreds of physical models of IGBTs and SiC MOSFETs and can simulate the non-ideal switching transients without increasing the simulation time exponentially.
Accurate Switching Transient Simulation
DSIM provides a rich component library of power switches, motors, photovoltaics, energy storage, and both continuous and discrete con-trol blocks.
Rich Component Library
DSIM Licensing
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DSIM Lite DSIM Pro DSIM Enterprise Limit on the number of power switches 15 50 Unlimited Simulation with physical power switch model
（Switching transient simulation）
× √ √ Cost $ $$ $$$
Featured Scenario
Motor Drives
A motor drive system has two significantly different time con-stants: short electrical time constant and long mechanical time constant. This requires a small time step and a long study time. DSIM is able to solve multi-time-scale systems efficiently, greatly reducing the simulation time and effort.
High-Frequency Converters
DSIM is capable of simulating power electronics circuits with high frequencies (in kHz or MHz) and simulating detailed switching transients, enabling users to carry out iterative designs and parameter optimization efficiently.
User-defined Control and Automation
DSIM provides functions such as C blocks and DLL blocks that allow users to implement any control algorithms. In addition, with the script function, one can automate the simulation process by running hundreds of simulations automatically with various parameters and operating conditions.
Complex Microgrid Simulation
A microgrid system has a large number of switches which often lead to long simulation time and convergence issues with existing simulation software. With the DSED method, DSIM can simulate large-scale systems such as microgrid with short simulation time and without convergence problems.
DSIM Version History
April, 2023
DSIM 2023a
● Thyristor and its control blocks
● Magnetic and mechanical components
● Nonlinear passive elements
● Battery, energy storage, and supercapacitor models
● More kinds of motors
● Algebraic loop solving
November, 2021
DSIM 2021b
● AC sweep
● Dynamic link library (DLL)
● Coupled simulation of switching transients and systems
● 50+ new elements and 20+ new examples
March, 2021
DSIM 2021a
● Electric-thermal simulation, loss and efficiency analysis based on switching transient model
● Coupled inductor and multi-winding transformer model
● More digital control blocks
● BDSED algorithm (backwards)
June, 2020
DSIM 2020a1
● Induction motor and permanent magnet motor models
● Photovoltaic module based on physical models
● C blocks for complex control
● Switching passive event solving
January, 2020
DSIM 2020a
● Fast simulation for large-scale systems
● Switching transient simulation
● Basic digital control blocks
● DSED algorithm (forward)
January, 2024
DSIM 2024a
● New GUI
● Co-simulation between DSIM and MATLAB/Simulink
● Thermal (thermal resistor , thermal capacitor , etc.)
● More motor drive modules
● More renewable energy modules
● Operation amplifier
January, 2025
DSIM 2025a
● DSIM API for use with MATLAB
● DSIM API for use with C/C++
● More flexible co-simulation with Simulink
● Optimizing curve display and data post-processing
January, 2026
DSIM 2026a
● DSIM API for use with Python
● New C Block compiler powered by Clang
● Streamlined User feedback channel
● Smart and precise element search
● Optimized circuit design and subcircuit performance
Since its first release in January 2020, DSIM has evolved to its eighth version (DSIM 2026a) with continuously improved functionality and expanded application areas.
