Inverter simulation model


Companies / Organizations


South Jutland

Simulation is an important tool when developing power electronics and simulation can bring several benefits to the product development. The ability to predict the product behavior in the early design phase is the key to make reliable and efficient products with a short time to market.

For an inverter model, the goal is to predict and optimize key parameters like:
• EMC performance and harmonic performance.
• Power loss and cooling.
• Lifetime estimation, e.g. Power cycling of power modules.

The challenge is the high complexity of a typical system. This means that a complete system simulation with traditional simulation tool like PSpice will be difficult and very time consuming. On the other hand, system level simulation tools like Simulink and Plecs do not provide the necessary details.

Lodam uses the Simetrix simulation software and Verilog-A, a hardware description language. Verilog-A is used to make accurate behavioral models. Typically, behavioral models are less complex than physics based models. This improves simulation speed and makes is possible to simulate complex systems with a high degree of detail.
Project description
Continuing and improving on the work already done on the simulation models used at Lodam. Projects may be done with in one or more of the following topics:
• Behavioral models - Improving the accuracy of Lodam IGBT behavioral adding temperature dependence.
• Parameter extraction - Improving the setup for extracting IGBT model parameters for the IGBT behavioral model.
• Compressors – Implementing a behavioral model of a compressor based on compressor polynomials and modeling the current ripple of compressor.
• Motor model – Implementing a detailed motors model for different motor technologies. 

Further information Please contact Lasse C. Larsen (Lodam employee) by email:  or by phone: +45 73 42 37 37.

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Technical University of Denmark

For almost two centuries DTU, Technical University of Denmark, has been dedicated to fulfilling the vision of H.C. Ørsted – the father of electromagnetism – who founded the university in 1829 to develop and create value using the natural sciences and the technical sciences to benefit society.

Today, DTU is ranked as one of the foremost technical universities in Europe, continues to set new records in the number of publications, and persistently increases and develops our partnerships with industry, and assignments accomplished by DTU’s public sector consultancy.

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