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Abstract

In the paper, methodologies for the magnetic field simulation in an axial flux permanent magnet coreless (AFPMC) motor have been proposed and discussed. Two approaches have been considered and investigated, both based on representing the 3D field distribution by superimposing axisymmetric 2D patterns. The first of studied approaches applies directly to the Biot-Savart law while the second uses a 2D axisymmetric finite element method. The selected results of magnetic field distributions and electromagnetic torque characteristics for the considered AFPMC motor have been presented and compared with results obtained using the commercial FEM package 'Maxwell'. The elaborated algorithms have been incorporated into the design routines allowing multi-parameter optimisation of the considered motor construction.

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Authors and Affiliations

Rafał M. Wojciechowski
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Abstract

Determination of the physico-chemical interactions between liquid and solid substances is a key technological factor in many industrial processes in metallurgy, electronics or the aviation industry, where technological processes are based on soldering/brazing technologies. Understanding of the bonding process, reactions between materials and their dynamics enables to make research on new materials and joining technologies, as well as to optimise and compare the existing ones. The paper focuses on a wetting force measurement method and its practical implementation in a laboratory stand – an integrated platform for automatic wetting force measurement at high temperatures. As an example of using the laboratory stand, an analysis of Ag addition to Cu-based brazes, including measurement of the wetting force and the wetting angle, is presented.

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Authors and Affiliations

Marcin Bąkała
Rafał Wojciechowski
Dominik Sankowski
Adam Rylski
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Abstract

This work focuses on the concept of operation and possibility of using a tuned inductor in electrical power systems with adaptive features. The idea presented here for the operation of the inductor is a new approach to the design of such devices. An example of a power adaptive system is a device for improving the quality of electricity. The negative impact of nonlinear loads on the operation of a power grid is a well-documented phenomenon. Hence, various types of “compensators” for reactive power, or for both reactive and distortion power, are used in electrical systems as a preventive measure. The concept of an inductor presented here offers wider possibilities for power compensation in power supply systems, compared to traditional solutions involving compensators based on fixed inductors. The use of the proposed solution in an adaptive compensator is only one example of its possible implementation in the area of power devices. In this work, we discuss the structure of the compensator, the basic aspects of the operation of the inductor, the results of simulation studies and the results of measurements obtained from a prototype.
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Authors and Affiliations

Michał Gwóźdź
1
ORCID: ORCID
Rafał M. Wojciechowski
1
ORCID: ORCID

  1. Institute of Electrical Engineering and Electronics, Poznan University of Technology, Piotrowo 3A, 60-965 Poznan, Poland
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Abstract

The paper is the second part of the work, devoted to a DC power supply with a power factor correction function. The power supply is equipped additionally with a shunt active power filter function, which enables the compensation of reactive and distortion power, generated by loads, connected to the same power grid node. A tunable inductive filter, included at the input of the power electronics current source – the main block of the power supply – allows for an improvement of the quality of the system control, compared to the device with a fixed inductive filter. This improvement was possible by extending the current source “frequency response”, which facilitated increasing the dynamics of current changes at the power supply input. The second part of the work briefly reminds the reader of the principle of operation and the structures of both the power supply control system and its power stage. The main purpose of this paper is to present the selected test results of the laboratory model of the electric system with the power supply.
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Bibliography

  1.  M. Gwóźdź, Ł. Ciepliński, and M. Krystkowiak, “Power supply with parallel reactive and distortion power compensation and tunable inductive filter – Part 1,” Bull. Pol. Acad. Sci. Tech. Sci., vol. 68, no. 3, pp. 401–408, 2020.
  2.  Y. Ma, F. Hong, X. Zhou, and Z. Gao, “An overview on harmonic suppression,” 2018 Chinese Control and Decision Conference (CCDC), Shenyang, 2018, pp. 4943– 4948, doi: 10.1109/CCDC.2018.8407987.
  3.  M. Pasko, D. Buła, K. Dębowski, D. Grabowski, and M. Maciążek, “Selected methods for improving operating conditions of three- phase systems working in the presence of current and voltage deformation – part I,” Archives of Electrical Engineering, vol. 67, no. 3, pp. 591–602, 2018.
  4.  M. Siwczyński and M. Jaraczewski, “Reactive compensator synthesis in time-domain,” Bull. Pol. Acad. Sci. Tech. Sci., vol. 60, no. 1, pp. 119–124, 2012.
  5.  D. Buła and M. Pasko, “Stability analysis of hybrid active power filter,” Bull. Pol. Acad. Sci. Tech. Sci., vol. 62, no. 2, pp. 279–286, 2014.
  6.  S. Fryze, “Active, reactive, and apparent power in circuits with nonsinusoidal voltage and current”, Przegląd Elektrotechniczny, vol. 13, pp. 193–203, 1931.
  7.  M.H. Rashid, Power Electronics Handbook. Oxford, Elsevier, 2018.
  8.  M. Krystkowiak, “Modified model of wideband power electronics controlled current source with output current modulation,” Elektronika, vol. 57, no. 11, pp. 65–70, 2016 [in Polish].
  9.  Mitsubishi Electric, Intelligent Power Modules. [Online]. Available: http://www.mitsubishielectric.com/semiconductors/products/powermod/ intelligentpmod/index.html [Accessed: 05 Feb. 2021].
  10.  Magnetics, [Online]. Available: https://www.mag-inc.com/home [Accessed: 05 Feb. 2021].
  11.  S. Saeed, R. Georgious, and J. Garcia, “Modeling of magnetic elements including losses application to variable inductor”, Energies, vol. 13, p. 1865, 2020, doi: 10.3390/en13081865.
  12.  E. Chong, and S. Zak. An Introduction to Optimization. 4th ed. Wiley Publishing, 2013.
  13.  Alfine-Tim [Online]. Available: http://analog.alfine.pl/oferta/produkty-alfine/systemy-uruchomieniowe [Accessed: 05 Feb. 2021].
  14.  M. Gwóźdź, Ł. Ciepliński, and A. Gąsiorek. “Real-time identification of the selected parameters of periodic signals,” Progress in Applied Electrical Engineering, PAEE, (on-line Conference), Kościelisko, Poland, 2020.
  15.  Standard EN 50160 (2010) – Voltage characteristics of electricity supplied by public distribution networks.
  16.  W. Kester, The Data Conversion Handbook. Newnes, Analog Devices Inc, 2005.
  17.  S. Pop, D. Pitica, and I. Ciascai, “Adaptive algorithm for error correction from sensor measurement,” 2008 31st International Spring Seminar on Electronics Technology, Budapest, 2008, pp. 373–378, doi: 10.1109/ISSE.2008.5276632.
  18.  J.C. Doyle, B.A. Francis, and A.R. Tannenbaum, Feedback Control Theory. Dover Publications, 2013.
  19.  T. Żabiński and L. Trybus, “Tuning P-PI and PI-PI controllers for electrical servos,” Bull. Pol. Acad. Sci. Tech. Sci., vol. 58, no. 1, pp. 51–58, 2010.
  20.  M. Naouar et al., “FPGA-based speed control of synchronous machine using a P-PI controller,” 2006 IEEE International Symposium on Industrial Electronics, Montreal, QC, Canada, 2006, pp. 1527–1532, doi: 10.1109/ISIE.2006.295698.
  21.  R. Porada and N. Mielczarek, “Modeling of chaotic systems in the ChaoPhS Program,” in Modelling Dynamics in Processes and Systems, W. Mitkowski, J. Kacprzyk, (Eds). Studies in Computational Intelligence, vol. 180, Springer, Berlin, Heidelberg, 2009, doi: 10.1007/978- 3-540-92203-2_1.
  22.  Analog Devices, [Online]. Available: https://www.analog.com/en/products/adsp-21369.html#product-documentation [Accessed: 05 Feb. 2021].
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Authors and Affiliations

Michał Gwóźdź
1
ORCID: ORCID
Rafał Wojciechowski
1
ORCID: ORCID
Łukasz Ciepliński
1
ORCID: ORCID

  1. Poznan University of Technology, Faculty of Control, Robotics and Electrical Engineering, Piotrowo 3A, 60-965 Poznan, Poland

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