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Article
Publication date: 18 January 2019

Marcin Lefik, Krzysztof Komeza, Ewa Napieralska-Juszczak, Daniel Roger and Piotr Andrzej Napieralski

The purpose of this paper is to present a comparison between reluctance synchronous machine-enabling work at high internal temperature (HT° machine) with laminated and solid rotor.

Abstract

Purpose

The purpose of this paper is to present a comparison between reluctance synchronous machine-enabling work at high internal temperature (HT° machine) with laminated and solid rotor.

Design/methodology/approach

To obtain heat sources for the thermal model, calculations of the electromagnetic field were made using the Opera 3D program including effect of rotation and the resulting eddy current losses. To analyse the thermal phenomenon, the 3D coupled thermal-fluid (CFD) model is used.

Findings

The presented results show clearly that laminated construction is much better from a point of view of efficiency and temperature. However, solid construction can be interesting for high speed machines due to their mechanical robustness.

Research limitations/implications

The main problem, despite the use of parallel calculations, is the long calculation time.

Practical implications

The obtained simulation and experimental results show the possibility of building a machine operating at a much higher ambient temperature than it was previously produced for example in the vicinity of the aircraft turbines.

Originality/value

The paper presents the application of fully three-dimensional coupled electromagnetic and thermal analysis of new machine constructions designed for elevated temperature.

Details

COMPEL - The international journal for computation and mathematics in electrical and electronic engineering, vol. 38 no. 4
Type: Research Article
ISSN: 0332-1649

Keywords

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Article
Publication date: 26 September 2018

Sheilla Atieno Odhiambo, Piotr Fiszer, Gilbert De Mey, Carla Hertleer, Ida Nuramdhani, Lieva Van Langenhove and Andrzej Napieralski

The purpose of this paper is to develop a capacitor fully integrated into a wearable textile fabric for the application on smart clothing.

Abstract

Purpose

The purpose of this paper is to develop a capacitor fully integrated into a wearable textile fabric for the application on smart clothing.

Design/methodology/approach

A small capacitor with stainless steel yarns as the electrodes and poly-(3,4–ethylenedioxythiophene): polystryrene sulphonate (PEDOT:PSS) as the dielectric material has been made, integrated into a textile fabric. The electric performance of the capacitor was analyzed and compared with other kinds of electric capacitors.

Findings

The fabricated small, PEDOT:PSS capacitor could finally power a calculator for 37 s with the energy stored in it.

Originality/value

This finding is of an important significance for a further development on the capacitor with a better performance.

Details

International Journal of Clothing Science and Technology, vol. 30 no. 6
Type: Research Article
ISSN: 0955-6222

Keywords

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Article
Publication date: 7 September 2012

Andrzej Napieralski, Malgorzata Napieralska, Michal Szermer and Cezary Maj

The purpose of this paper is to show the evolution of microsystems together with modeling methods in the space of dozen years as a result of finished research in the frame…

Abstract

Purpose

The purpose of this paper is to show the evolution of microsystems together with modeling methods in the space of dozen years as a result of finished research in the frame of several projects.

Design/methodology/approach

In this paper several approaches are presented. First, microsystems were built in multi project wafer technology. They were demonstrators like micromotor, micromirrors or micropumps modeled using dedicated design tool. A multi purpose chip was also designed using HDL description and FEM simulations. The next project concerned chemical sensors, where specialized models were developed and implemented in VHDL‐AMS in order to perform multidomain behavioral simulations. Dedicated tools were also developed for medical applications.

Findings

The evolution of MEMS technology is strictly connected with simulation and modeling methods. The success and short time to market need fast and accurate simulation methods. This paper shows that the approach depends on application. Moreover, it is connected with the access to the technology.

Originality/value

This paper presents a brief overview on projects performed in DMCS‐TUL department. It shows the evolution of modeling methods and technology used in developing and fabrication of microsystems for various applications.

Details

COMPEL - The international journal for computation and mathematics in electrical and electronic engineering, vol. 31 no. 5
Type: Research Article
ISSN: 0332-1649

Keywords

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