Total-dose Effects on Power MOSFET in SEPIC Converter for Nanosatellite Applications

Author(s): Saranya Krishnamurthy, Ramani Kannan*, Faidhi F.A. Mohamad, Muhamad S. Ahmad, Yusof Abdullah

Journal Name: Recent Advances in Electrical & Electronic Engineering
Formerly Recent Patents on Electrical & Electronic Engineering

Volume 13 , Issue 5 , 2020

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Graphical Abstract:


Background: Power converters used in nanosatellite application required to be more tolerant to radiations including proton, electron and heavy-ion radiation.

Methods: A Single-Ended Primary Inductance Converter (SEPIC) is selected for the nanosatellite application because of the availability to step up and down the input voltage as well as having a non-inverting polarity between the input and output voltage. In this paper, remodeled SEPIC converter proposed with an improved performance at radiation environment to work for nanosatellite application. In addition, the analysis is carried out for the irradiated power MOSFET in SEPIC converter to check its impact on converter behavior.

Results: Experiments conducted with the help of power MOSFET switch used in converter, irradiated with Cobalt60 gamma ray dose level from 50krad to 300krad and output characteristics analyzed by chancing the duty cycle of converter. Investigations shown that conventional converter output characteristics were virtually constant from 10% to 60% duty cycle when different radiated MOSFETs used in the converter.

Conclusion: The electrical characteristics started to fluctuate at 60% duty cycle and onwards, while the remodeled converter circuit was less distorted when increasing the radiation dose.

Keywords: SEPIC converter, power MOSFET, total dose radiation effects, electrical characteristics, gama ray, nanosatellite.

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Article Details

Year: 2020
Page: [758 - 765]
Pages: 8
DOI: 10.2174/2352096512666191004154951
Price: $25

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