Search Results - "Pentz, D. C."

Measuring Consumers' Perceived Risk on Varietal Level: A Mixed Methods Approach Applied to Wine by van der Colff, N., Pentz, C. D., Nieuwoudt, H. H.

“…Perceived risk (PR) is a product-specific factor in consumer decision-making. With different varietals, the complex wine category causes significant consumer…”
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Evaluation of a quasi-coaxial printed circuit board transformer by Pentz, D.C., Hofsajer, I.W.

“…Purpose - The purpose of this paper is to investigate the possibility of utilizing printed circuit board (pcb) technology to manufacture coaxial transformers…”
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Improved AC-resistance of multiple foil windings by varying foil thickness of successive layers by Pentz, D.C., Hofsajer, I.W.

“…Purpose - This paper aims to introduce a technique for optimizing conductor dimensions for construction of helical planar inductor windings with reduced ac-…”
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Some considerations for miniaturized measurement shunts in high frequency power electronic converters by Joannou, A. J. L., Pentz, D. C., van Wyk, J. D., de Beer, A. S.

“…Power semi-conductors are able to achieve switching transients within a few nanoseconds and possibly even faster. These fast switching transients will need to…”
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An experimental study of switching GaN FETs in a coaxial transmission line by Joannou, A. J. L., Pentz, D. C., van Wyk, J. D., de Beer, A. S.

“…The switching characteristics of GaN FETs have not yet been measured accurately because of their small electromagnetic size in relation to the circuit and the…”
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Socio-demographic insights into south african student drinking behaviour by Lategan, B., du Preez, R., Pentz, C.

“…Hazardous and harmful drinking is on the rise among adolescents and young adults and has been classified as a major health problem. University students are a…”
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Why students drink : a study of South African university students' drinking behaviour by Lategan, B.W., Du Preez, R., Pentz, C.D.

“…Little is known about the drinking behaviour of South African university students and education and prevention campaigns are not necessarily based on…”
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Overview of helical foil winding design for planar magnetic components by Pentz, D. C.

“…Planar magnetic components such as transformers and inductors offer a range of physical, electromagnetic and thermal advantages. Methods of conductor…”
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Overview of helical foil winding design for planar magnetic components by Pentz, D C

“…This paper further elaborates on the topic of conductor optimization for planar helical foil windings. Part 1 of this work briefly covers the classical design…”
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Implementation of a primary tapped transformer in a high frequency isolated power converter by Joannou, A. J. L., Pentz, D. C.

“…On load, transformer primary tap changing is not common in high frequency converters. This paper investigates a new converter topology to drive primary tapped…”
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Performance evaluation of a simplified multi-function current transformer for high frequency power converters by Pentz, D. C., van der Merwe, F. H.

“…A multi-function current transformer introduced some years ago is revisited in an effort to improve its manufacturability. The original current sensor has the…”
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Novel Technique for Shaped Planar Inductor Winding Optimization in Gapped Core Applications by Pentz, D.C., Hofsajer, I.W.

“…AC-loss analysis in gapped-core inductor windings can be performed using finite element analysis (FEM) software with good results. The process however becomes…”
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A Performance Evaluation of Shaped Planar Inductor Windings in Gapped Core Applications Utilizing Turns With Constant DC-Resistance by Pentz, D.C., Hofsajer, I.W.

“…AC-losses in gapped-core planar inductor windings seem to be dominated by eddy losses induced by the time varying fringing flux near the air gap. Shaping the…”
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