• Journal of Power Electronics
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• v.16 no.6
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• pp.2085-2098
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• 2016

Laminated busbars with a low stray inductance are widely used in NPC three-level inverters, even though some of them have poor performances in heat equilibrium and overvoltage suppression. Therefore, a theoretical method is in need to establish an accurate mathematical model of laminated busbars and to calculate the impedance and stray inductance of each commutation loop to improve the heat equilibrium and overvoltage suppression performance. Firstly, an equivalent circuit of a NPC three-level inverter laminated busbar was built with an analysis of the commutation processes. Secondly, on the basis of a 3D (three dimensional) cubical thermal model and mirror circulation theory, a supersymmetric mirror circulation 3D cubical thermal model was built. Based on this, the laminated busbar was decomposed in 3D space to calculate the equivalent resistance and stray inductance in each commutation loop. Finally, the model and analysis results were put into a busbar design, simulation and experiments, whose results demonstrate the accuracy and feasibility of the proposed method.

• 한국태양에너지학회:학술대회논문집
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• 2012.03a
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• pp.102-107
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• 2012

The purpose of thesis is to improve output of solar cell module by enhancing transmission efficiency. To improve transmission efficiency, transmission interconnection ribbon which is used to connect solar cells and busbar which contacts with it has been improved. To secure reliability, comparison research on output of solar cell modules has been conducted by manufacturing PCB module formed by laminated metal with the same output. The result of this research is based on a output efficiency test of modules by comparing electric conductivity of soldering busbar and laminated PCV type of busbar.