Multidomain modelling of multichip SiC power modules

Olanrewaju, Olufisayo Abimbola (2020) Multidomain modelling of multichip SiC power modules. PhD thesis, University of Nottingham.

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Increasing energy demands in different application fields of power electronics (e.g. Photovoltaics, Traction, Aerospace) have led to increased demand for power electronic systems with higher conversion efficiency, higher power density, reliability and higher operating temperatures among other needs. Given that power devices are an essential component of power electronic systems and their operation cuts across multiple energy domains (e.g. electrical, thermal, mechanical), efficient multidomain design of power electronic devices is crucial to meeting the increased energy demands. Simulation is a key tool for the development of novel technology and for preliminary assessment of its performance in power electronic applications. However, for simulation to be an effective tool, compromise between accuracy and computational efficiency is required.

This thesis presents an overall modelling methodology for the use of simulation in virtual prototyping of multichip power modules with an optimum compromise between accuracy and computational efficiency. Semiconductor models for the electrical domain, discretised structural models for the thermal domain and analytical models for the mechanical domain are created based on the overall modelling methodology and validated. The models created for the electrical, thermal and thermomechanical domains were coupled in realistic power electronic simulation scenarios. Parametric studies were also conducted on the combined electro-thermo-mechanical model by varying electrical, thermal, geometry, material properties and observing their multidomain effects in circuit level simulation. The results show that the proposed methodology is a time and cost-saving tool to be incorporated in the design of power modules before physical prototyping of the design is conducted.

Item Type: Thesis (University of Nottingham only) (PhD)
Supervisors: Castellazzi, Alberto
Bozkho, Serhiy
Keywords: modelling simulation; VHDL-AMS multi-domain modelling; SiC power modules thermal maps
Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK7800 Electronics
Faculties/Schools: UK Campuses > Faculty of Engineering
Item ID: 59881
Depositing User: OLANREWAJU, Olufisayo
Date Deposited: 31 Jul 2020 04:40
Last Modified: 31 Jul 2020 04:40

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