NDLI: DSP Implementation for Measuring the Loop Gain Frequency Response of Digitally Controlled Power Converters

Content Provider	IEEE Xplore Digital Library
Author	Castello, J. Espi, J.M.
Copyright Year	1986
Abstract	This paper presents a method for measuring the loop gain frequency response of digitally controlled power converters, without the need of any expensive measurement equipment such as frequency response analyzers (FRA). The method is based on the traditional perturbation and measurement scheme. The perturbation is internally synthesized by the DSP and applied as pulse-width modulation to the converter. The loop input and output data are sent to a PC via universal serial bus, which performs online the DFT of sent data. The perturbation amplitude is varied with frequency to improve signal-to-noise ratio of measurements. The number of cycles used to perform discrete Fourier transform calculations is also varied to reduce the error induced by some rounding factors at high frequencies. The proposed method offers accuracy, ease of implementation, and low computational cost.
Sponsorship	IEEE Power Electronics Society
Starting Page	4113
Ending Page	4121
Page Count	9
File Size	1228475
File Format	PDF
ISSN	08858993
Volume Number	27
Issue Number	9
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2012-09-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Gain measurement Digital signal processing Frequency measurement Universal Serial Bus Discrete Fourier transforms Mathematical model Frequency response universal serial bus (USB) Dead-beat control digital signal processor (DSP) loop gain measurement power system control robust predictive current control (RPCC)
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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