Digital power factor meter based on non-linear analogue-to-digital conversion

Hafeth, Basim A.; Abdul-Karim, M. A. H.

doi:10.1080/00207218508939049

Cited by 5 publications

(2 citation statements)

References 3 publications

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“…The analogue electronic power factor meter is implemented using analogue computation circuits and a low-pass filter. Because of the low-pass filter, the transient response of the analogue electronic power factor meter is slow [3][4][5]. Hence, it can be used only for average but not instantaneous power factor measurements.…”

Section: Introductionmentioning

confidence: 99%

“…Hence, it can be used only for average but not instantaneous power factor measurements. As for the digital power factor detectors, they are inexpensive, but their complicated circuit configuration together with the low-pass filter can realize only the averaged signal function [4,5]. Hence, the transient response of the digital power factor detectors is also slow.…”

Section: Introductionmentioning

confidence: 99%

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A Quick Response Power Factor Detector for Nonlinear Loads

Jiang

Shih

2013

AMM

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A fast power factor detector for nonlinear loads is proposed to overcome the drawback of conventional detectors, which can measure only the power factor of linear loads. The design of the proposed detector is based on the concept of additional characteristic of trigonometric function. It does not require any low-pass filter or integrator. Therefore, the transient response of the proposed detector is much faster than that of the conventional detectors. The theoretical response time of the proposed detector is less than one-fourth of a cycle. Because of its promising accuracy and rapid transient response, it can be used in many systems such as the control of power systems, and active power filters, to improve their transient performance. Theoretical analysis and experimental results are also detailed in this paper.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A Quick Response Power Factor Detector for Nonlinear Loads

Jiang

Shih

2013

AMM

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Power Factor Measurement

Czarnecki

1999

Wiley Encyclopedia of Electrical and Electronics Engineering

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The sections in this article are Power Factor and Its Meaning Power Factor in Single‐Phase, 2‐Phase, and 3‐Phase Balanced Circuits With Sinusoidal Voltage and Current Effects of the Power Factor on the Supply Source Power Factor in 3‐Phase Unbalanced Systems with Sinusoidal Voltages and Currents Power Factor of Linear Loads with Nonsinusoidal Voltage Power Factor of Nonlinear Loads with Sinusoidal Supply Voltage Power Factor Measurement Power Factor Meters Iron‐Vane PF Meters Crossed‐Coil PF Meters Electronic Power Factor Meters Based on Phase‐Shift Angle Measurement Electronic Power Factor Meters Based on the Measurement of the Ratio of Active to Apparent Power

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Systematic selection of analogue redesign method for forward-type digital power converters

Cave-Ayland

Becerra

Potter

et al. 2013

International Journal of Electronics

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This paper proposes a method to objectively determine the most suitable analogue redesign method for forward type converters under digital voltage mode control. Particular emphasis is placed on determining the method which allows the highest phase margin at the particular switching and crossover frequencies chosen by the designer. It is shown that at high crossover frequencies with respect to switching frequency, controllers designed using backward integration have the largest phase margin; whereas at low crossover frequencies with respect to switching frequency, controllers designed using bilinear integration have the largest phase margins. An algorithm has been developed to determine the frequency of the crossing point. An accurate model of the power stage is used for simulation and experimental results from a Buck converter are collected. The performance of the digital controllers is compared to that of the equivalent analogue controller both in simulation and experiment. Excellent correlation between the simulation and experimental results is presented. This work gives a concrete example to aid academics and engineers to choose a discretisation method with confidence.

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Digital power factor meter based on non-linear analogue-to-digital conversion

Cited by 5 publications

References 3 publications

A Quick Response Power Factor Detector for Nonlinear Loads

A Quick Response Power Factor Detector for Nonlinear Loads

Power Factor Measurement

Systematic selection of analogue redesign method for forward-type digital power converters

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