Cavity Propagation under Repetitive Voltage Impulses in Silicone Gel for Encapsulation of Power Modules

Nakamura, Shigenari; Mitani, T.; Ejiri, Haruki; Sato, Masahiro; Kumada, Akiko; Hidaka, Kunihiko; Hayase, Yuji; Takano, Sho; Yamashiro, Keisuke; Takano, Tsuyoshi

doi:10.1109/icd.2018.8514640

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(B) Effect Of Voltage Waveform and Frequency1

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2024

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“…The frequency and rise time of the applied voltage will also influence the dynamics of electrical treeing in silicone gel [39][40][41]. Attention was paid to the cavity length under repetitive voltage pulses.…”

Section: (B) Effect Of Voltage Waveform and Frequencymentioning

confidence: 99%

Insulation Materials and Systems for Power Electronics Modules: A Review Identifying Challenges and Future Research Needs

Zhang

Ghassemi

Zhang

2021

IEEE Trans. Dielect. Electr. Insul.

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This manuscript critically reviews recent research on electrical insulation materials and systems used in power electronics devices and focuses on electrical treeing in silicone gel, PD modeling, and mitigation methods. For mitigation methods, electric field grading techniques, such as 1) various geometrical techniques, and 2) applying nonlinear dielectrics are discussed. Alternatives for silicone gel, such as liquid dielectrics, are also highlighted. The drawbacks of reported research and technical gaps are identified. In particular, we show that the investigations carried out to date are in their infancy regarding the working conditions targeted for next-generation WBG power devices. This review will provide a useful framework and point of reference for future research.

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Section: (B) Effect Of Voltage Waveform and Frequencymentioning

confidence: 99%