A Way for Measuring the Temperature Transients of Capacitors

Sárkány, Zoltán; Rencz, M.

doi:10.25046/aj0203174

Cited by 3 publications

(2 citation statements)

References 7 publications

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“…Assuming the design aim of the VRM is to keep the maximum voltage undershoot (e.g., ∆I = 15 A) within 5% of the steady-state reference value. @ +85 °C, 12.6 V Rha [15] 55.6 °C/W 133.1 °C/W 22.9 °C/W τha [16], [17] 40 s 83.9 s 0.14 s…”

Section: A Mission Profile and Capacitor Types Selectionmentioning

confidence: 99%

Reliability Analysis of Capacitors in Voltage Regulator Modules With Consecutive Load Transients

Zhao

Zhou

Fang

et al. 2021

IEEE Trans. Power Electron.

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Capacitors are critical in voltage regulator modules (VRMs) which contribute to store energy and stabilize the output voltage during load transients. Usually, VRMs work with consecutive load transients, which would bring more electrothermal stress to capacitors and affect the reliability of capacitors compared with the steady-state operation. Recently, some efforts have been made to investigate the reliability of capacitors in power electronic converters. Unfortunately, transient processes are commonly ignored, which can impair the accuracy of the lifetime estimation. Regarding this issue, this paper investigates the influence of transients on the damage of capacitors in VRMs. A 150 W VRM is introduced as a case study. Firstly, the electrothermal stresses during steady state and transients are analyzed.Then, the lifetime calculation is considered from a single capacitor to hybrid capacitor banks. In addition, a suitable capacitor configuration of capacitor banks is also provided, in order to maximize its lifetime.

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Section: A Mission Profile and Capacitor Types Selectionmentioning

confidence: 99%

Reliability Analysis of Capacitors in Voltage Regulator Modules With Consecutive Load Transients

Zhao

Zhou

Fang

et al. 2021

IEEE Trans. Power Electron.

View full text Add to dashboard Cite

show abstract

“…A temperature-sensitive electrical parameter-based core temperature estimation method is proposed based on the linear relationship between temperature and capacitance in [82,83]. As the change in capacitance over the entire operating temperature range is only around 10% of its value at 25°C, this method requires accurate estimation of the capacitance for core temperature estimation.…”

Section: Core Temperature Estimation Methodsmentioning

confidence: 99%