Reconstruct the PWM Signal of Switching Power Supplies from the Near Field Radiation-Reference-Cited by-同舟云学术

Reconstruct the PWM Signal of Switching Power Supplies from the Near Field Radiation

Published:2013-07 Issue: Volume:718-720 Page:1792-1796
ISSN:1662-8985
Container-title:Advanced Materials Research
language:
Short-container-title:AMR

Author:

Li Zhong Qun¹,Xie Kai²,Ye Ying Hao²,Guo Rong Bin¹,Wang Xu Fei¹

Affiliation:

1. Science and Technology on Electronic Test and Measurement Laboratory

2. Xidian University

Abstract

A non-contact testing method is proposed for encapsulation treated or insulation coated switching power supplies, which is implemented by reconstructing the pulse width modulation (PWM) signal of switching converters from the near field radiation of magnetic components. The radiation pattern of a buck converter is investigated, and the magnetic field sensing probe and PWM signal reconstruction circuit are also illustrated. The reconstruction testing is carried out on a buck converter; the duty cycle error of the reconstructed PWM signal is less than 0.2%, which validates the proposed method.

Publisher

Trans Tech Publications, Ltd.

Subject

General Engineering

Link

https://www.scientific.net/AMR.718-720.1792.pdf

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