Benefits of Finer Semiconductor Device Granularity on Power Converter Thermal Stress and MTTF

Rafiezadeh, Roya; Busquets‐Monge, Sergio; Alepuz, Salvador

doi:10.1109/iecon48115.2021.9589885

Cited by 7 publications

(3 citation statements)

References 11 publications

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“…These models need to be computationally efficient, as a large number of function evaluations will need to be performed in each optimization run, while also being accurate enough to capture the main performance features of the system. The selected models are described in detail in [4] and [7]. In the following, their main characteristics are summarized.…”

Section: E Modelsmentioning

confidence: 99%

“…(15) Constraints ( 14) and (15) force the minimum number of SCs in each leg position to 1. They also limit the maximum number of SCs in parallel of the same type to 5, in order to limit the design space and also because it has already been shown in previous works that as the paralleling increases, the incremental benefits in terms of efficiency and reliability decrease [4].…”

Section: F Constraintsmentioning

confidence: 99%

“…Reference [4] illustrates in selected examples the benefits in terms of efficiency and reliability that the finer granularity of SCA-based power converter design can bring.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Design Optimization of Switching-Cell-Array-Based Power Converters

Rafiezadeh

Busquets‐Monge

Alepuz

2022

2022 IEEE 31st International Symposium on Industrial Electronics (ISIE)

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With the aim to increase standardization, reduce the cost, and obtain advanced performance features, the design of voltage-source power converter legs can be undertaken by combining several instances of a standard switching cell, properly connected in active neutral-point-clamped structures to reach the desired voltage and current ratings. These switching cells can be organized into switching-cell arrays. This design approach introduces several degrees of freedom into the design. Namely, the different options to interconnect the cells and the distribution of switching losses among these cells. This article aims to define an optimization problem to explore this design space. The design problem is formulated in different scenarios, involving different conversion configurations (dc-dc and dc-ac), different leg number of levels (two and three), and different types of available cells (standard and conduction-optimized in combination with switching-optimized). A weighted objective function is then defined in terms of leg simplicity, efficiency, and reliability. The value of the design variables that minimize the objective function with different sets of weighting factors are obtained under selected scenarios and operating conditions, to illustrate the flexibility of the converter design approach under study. The solution of the optimization problem is obtained using a surrogate optimization algorithm in MATLAB, well suited to quickly solve optimization problems involving a combination of integer design variables (the number of parallel switching cells in each converter leg position) and continuous design variables (the proportion of switching losses taken by each cell), together with linear and nonlinear constraints.

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Section: E Modelsmentioning

confidence: 99%

Section: F Constraintsmentioning

confidence: 99%