Study of moisture transport in silicone gel for IGBT modules

Zhang, Kaichen; Schlottig, Gerd; Mengotti, Elena; Quittard, O.; Iannuzzo, Francesco

doi:10.1016/j.microrel.2020.113773

Cited by 7 publications

(3 citation statements)

References 4 publications

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“…It has been suggested that harsh weather conditions such as low pressures, cosmic radiation, and moisture accelerate the insulation degradation of encapsulation materials. In [49], Zhang et.al. aimed to assess mass changes, relative humidity variations, and the diffusion coefficient in SGs during moisture absorption or desorption.…”

Section: Ieee Transactions On Dielectrics and Electrical Insulationmentioning

confidence: 99%

A Comprehensive Review of Mitigation Strategies to Address Insulation Challenges Within High-Voltage, High-Power-Density (U)WBG Power Module Packages

Adhikari,

Ghassemi

2024

IEEE Trans. Dielect. Electr. Insul.

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Within the expanding domain of electrical power demand, the future of power module packaging is entwined with the progress of (ultra) wide bandgap (UWBG) materials. These materials, like silicon carbide (SiC), aluminum nitride (AlN), and diamond, offer advantages with higher power density, decreased weight, and expanded operational abilities regarding temperature, voltage, and frequency. However, the pursuit of pushing these limits confronts challenges within insulation systems, which may struggle to endure the demands of these parameters, potentially resulting in unfavorable conditions like high electric field, space charge accumulation, electrical treeing, and partial discharge (PD), leading to insulation failure. The emphasis of this paper is to review the insulation challenges within (U)WBG power modules and recent research in mitigating the electric field stress at triple points (TPs) and resolving the PD issues. The manuscript first discusses the high electric field stress issue at triple points. Then, ceramic substrate materials, encapsulation materials, and the influence of harsh weather conditions on them are reviewed. The space charge, electrical treeing, and PD issues within encapsulation materials are analyzed under practical operation conditions of (U)WBG power modules like high frequency, temperature, and square wave pulses. Finally, the various strategies to alleviate the associated insulation challenges are meticulously discussed. While the identified mitigation strategies are able to strengthen insulation systems for packaging, their validation under actual operational conditions of (U)WBG power modules remains relatively unexplored, representing a potential avenue for further investigation. This review offers a valuable framework by providing the constraints of the current studies and recommendations for the future that can be utilized as a reference point for future research endeavors. Index Terms-(U)WBG power module packaging, partial discharge, triple points, encapsulation material, electric field stress, high power density, field grading materials, nonlinear field-dependent conductivity layerThis paragraph of the first footnote will contain the date on which you submitted your paper for review, which is populated by IEEE.

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Section: Ieee Transactions On Dielectrics and Electrical Insulationmentioning

confidence: 99%

A Comprehensive Review of Mitigation Strategies to Address Insulation Challenges Within High-Voltage, High-Power-Density (U)WBG Power Module Packages

Adhikari,

Ghassemi

2024

IEEE Trans. Dielect. Electr. Insul.

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“…These impressive mechanical attributes, along with its dielectric internal insulation capabilities, render it well-suited for applications in IGBT packaging [9], [10]. This protective layer needs to be thoroughly examined to understand the moisture buildup within the power modules [4], [11].…”

Section: Introductionmentioning

confidence: 99%

Investigating Humidity Transfer in IGBT Modules: An Integrated Experimental and Simulation Approach

Titova,

Lapke

2024

IEEE Open J. Power Electron.

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This study presents a novel, integrated approach to investigating and characterizing the impact of humidity on Insulated-Gate Bipolar Transistors (IGBTs) within large-scale inverter systems. Combining meticulously designed experimental setups and advanced finite element simulations, we delve deep into the complex dynamics of moisture transfer within IGBT modules. Our research demonstrates a meticulously designed experimental setup within a controlled climate chamber, enabling a comprehensive characterization process of the humidity transfer into the IGBT module. The proposed method allows for a detailed study of the moisture distribution as well as the effect of the temperature on the moisture within an IGBT module. We leverage the advanced capabilities of commercial finite element software to complement our experimental findings. These simulations enable a deeper understanding of the moisture distribution's symmetries and provide invaluable insights into simplifying the complex simulations. By integrating these diverse methodologies, we develop a comprehensive approach that deciphers the spatial distribution of humidity within the module and its real-time responses to environmental conditions. This integrated approach holds an immense potential for analyzing optimal system performance and facilitating self-optimization of the inverter by predicting stress induced by humidity.

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“…Currently, household dehumidifiers typically use traditional desiccants such as silica gel [16], zeolite [17] and calcium chloride. Ge et al [18] investigated the dehumidification performance of a silica gel desiccant and found that it can only meet the dehumidification requirements when the regeneration temperature is above 100 • C at 37 • C and 65% RH.…”

Section: Introductionmentioning

confidence: 99%

Performance Investigation and Optimization of Composite Materials in Household Dehumidifiers

Liu,

Kong,

Zhao

et al. 2024

Buildings

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The efficiency of household dehumidifiers is affected by air temperature and the temperature used for regeneration. A regeneration temperature that is too high can lead to increased energy use, heat build-up in the desiccant wheel, and lower dehumidification efficiency. In this study, we developed a LiCl@Al-Fum composite material and evaluated it through physical characterization and module testing. The results show that the LiCl@Al-Fum composite with a 20% mass fraction is particularly effective as a desiccant material. Additionally, a 15% volume concentration of neutral silica sol was identified as the optimal binder concentration. A comparative analysis of the effects of glass-fiber desiccant wheels (GF DWs), aluminum desiccant wheels (Al DWs), and commercial desiccant wheels (CM DWs) on household dehumidifier performance revealed that the Al DWs outperformed the CM DWs, showing a 13% improvement in the dehumidification rate and a 12.56% increase in the DCPP. An increase in the dehumidifier structure led to increases in the dehumidification rate by 11.8%, 11.9%, and 10% and in the DCPP by 11.6%, 12.1%, and 10%, respectively. Moreover, the modifications resulted in a 3.85 °C, 3.34 °C, and 3.8 °C decrease in the temperature.

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Study of moisture transport in silicone gel for IGBT modules

Cited by 7 publications

References 4 publications

A Comprehensive Review of Mitigation Strategies to Address Insulation Challenges Within High-Voltage, High-Power-Density (U)WBG Power Module Packages

A Comprehensive Review of Mitigation Strategies to Address Insulation Challenges Within High-Voltage, High-Power-Density (U)WBG Power Module Packages

Investigating Humidity Transfer in IGBT Modules: An Integrated Experimental and Simulation Approach

Performance Investigation and Optimization of Composite Materials in Household Dehumidifiers

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