Pub Date : 2023-07-14DOI: 10.24425/aee.2023.146038
Mariusz BARANSKIo, Mariusz Stanisław Barański
: The paper discusses the methods for calculating the power parameters of a line start permanent magnet synchronous motor (LSPMSM). The calculations have been performed using the author’s specialized FEM software and professional FEM packages, ANSYS Maxwell and COMSOL Multiphysics. The author’s algorithm for solving equations of the electromagnetic field based on the FEM has been presented. The in-house software developed on this algorithm and professional software have been used to analyse the power parameters of the LSPMS motor. In addition, both calculation time and accuracy were analysed. The calculation results were compared to the measurement results.
{"title":"Comparative analysis of the power parameters of a line start permanent magnet synchronous motor using professional FEM packages and in-house software","authors":"Mariusz BARANSKIo, Mariusz Stanisław Barański","doi":"10.24425/aee.2023.146038","DOIUrl":"https://doi.org/10.24425/aee.2023.146038","url":null,"abstract":": The paper discusses the methods for calculating the power parameters of a line start permanent magnet synchronous motor (LSPMSM). The calculations have been performed using the author’s specialized FEM software and professional FEM packages, ANSYS Maxwell and COMSOL Multiphysics. The author’s algorithm for solving equations of the electromagnetic field based on the FEM has been presented. The in-house software developed on this algorithm and professional software have been used to analyse the power parameters of the LSPMS motor. In addition, both calculation time and accuracy were analysed. The calculation results were compared to the measurement results.","PeriodicalId":45464,"journal":{"name":"Archives of Electrical Engineering","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2023-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82991848","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-07-14DOI: 10.24425/aee.2023.146039
Michał LECHo
: The article presents the results of laboratory measurements of 𝑈 𝑑 breakdown voltages in a high-voltage vacuum insulating system for different pressures, contact gaps, type of electrode contacts and type of residual gas inside the discharge chamber. First of all, the electrical strength of the discharge chamber with a contact system terminated with contact pads made of W 70 Cu 30 and Cu 75 Cr 25 material was compared for selected values of contact gaps. It was found that below a pressure of 𝑝 = 3 . 0 × 10 − 1 Pa the electrical strength reaches an approximately constant value for each of the set contact gaps 𝑑 . Analytical relationships were determined to calculate this value for each of the contact pads used. Above a pressure of 𝑝 = 3 . 0 × 10 − 1 Pa, the measured values of 𝑈 𝑑 breakdown voltages decrease sharply. The values of breakdown voltages in the discharge chamber with residual gases in the form of air, argon, neon and helium were also determined for selected values of contact gaps 𝑑 . Depending on the residual gases used, significant differences were noted in the values of pressure 𝑝 at which the loss of insulating properties in the discharge chamber occurred. These values were 3 . 3 × 10 − 1 Pa for argon, 4 . 1 × 10 − 1 Pa for air, 6 . 4 × 10 − 1 Pa for neon, and 2 . 55 × 10 0 Pa for helium, respectively.
{"title":"Effect of selected parameters on the electrical strength of a high-voltage vacuum insulation system","authors":"Michał LECHo","doi":"10.24425/aee.2023.146039","DOIUrl":"https://doi.org/10.24425/aee.2023.146039","url":null,"abstract":": The article presents the results of laboratory measurements of 𝑈 𝑑 breakdown voltages in a high-voltage vacuum insulating system for different pressures, contact gaps, type of electrode contacts and type of residual gas inside the discharge chamber. First of all, the electrical strength of the discharge chamber with a contact system terminated with contact pads made of W 70 Cu 30 and Cu 75 Cr 25 material was compared for selected values of contact gaps. It was found that below a pressure of 𝑝 = 3 . 0 × 10 − 1 Pa the electrical strength reaches an approximately constant value for each of the set contact gaps 𝑑 . Analytical relationships were determined to calculate this value for each of the contact pads used. Above a pressure of 𝑝 = 3 . 0 × 10 − 1 Pa, the measured values of 𝑈 𝑑 breakdown voltages decrease sharply. The values of breakdown voltages in the discharge chamber with residual gases in the form of air, argon, neon and helium were also determined for selected values of contact gaps 𝑑 . Depending on the residual gases used, significant differences were noted in the values of pressure 𝑝 at which the loss of insulating properties in the discharge chamber occurred. These values were 3 . 3 × 10 − 1 Pa for argon, 4 . 1 × 10 − 1 Pa for air, 6 . 4 × 10 − 1 Pa for neon, and 2 . 55 × 10 0 Pa for helium, respectively.","PeriodicalId":45464,"journal":{"name":"Archives of Electrical Engineering","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2023-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76071817","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-06-28DOI: 10.24425/aee.2023.145416
{"title":"Hard magnetic material measurements in a pulsed field magnetometer considering coating and eddy current effects","authors":"","doi":"10.24425/aee.2023.145416","DOIUrl":"https://doi.org/10.24425/aee.2023.145416","url":null,"abstract":"","PeriodicalId":45464,"journal":{"name":"Archives of Electrical Engineering","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2023-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76085398","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-06-28DOI: 10.24425/aee.2023.145419
IU Haiyangl, Y. I. C. Hen, UO Sixul, J. I. J. Iang, H. A. J. Ian
: The low frequency ripple of the input side current of the single-phase inverter will reduce the efficiency of the power generation system and affect the overall performance of the system. Aiming at this problem, this paper proposes a two-modal modulation method and its MPC multi-loop composite control strategy on the circuit topology of a single-stage boost inverter with a buffer unit. The control strategy achieves the balance of active power on both sides of AC and DC by controlling the stable average value of the buffer capacitor voltage, and provides a current reference for inductance current of the DC input side. At the same time, the MPC controller uses the minimum inductor current error as the cost function to control inductor current to track its reference to achieve low frequency ripple suppression of the input current. In principle, it is expounded that the inverter using the proposed control strategy has better low frequency ripple suppression effect than the multi-loop PI control strategy, and the conclusion is proved by the simulation data. Finally, an experimental device of a single-stage boost inverter using MPC multi-loop composite control strategy is designed and fabricated, and the experimental results show that the proposed research scheme has good low frequency ripple suppression effect and strong adaptability to different types of loads.
{"title":"Research on low frequency ripple suppression technology of inverter based on model prediction","authors":"IU Haiyangl, Y. I. C. Hen, UO Sixul, J. I. J. Iang, H. A. J. Ian","doi":"10.24425/aee.2023.145419","DOIUrl":"https://doi.org/10.24425/aee.2023.145419","url":null,"abstract":": The low frequency ripple of the input side current of the single-phase inverter will reduce the efficiency of the power generation system and affect the overall performance of the system. Aiming at this problem, this paper proposes a two-modal modulation method and its MPC multi-loop composite control strategy on the circuit topology of a single-stage boost inverter with a buffer unit. The control strategy achieves the balance of active power on both sides of AC and DC by controlling the stable average value of the buffer capacitor voltage, and provides a current reference for inductance current of the DC input side. At the same time, the MPC controller uses the minimum inductor current error as the cost function to control inductor current to track its reference to achieve low frequency ripple suppression of the input current. In principle, it is expounded that the inverter using the proposed control strategy has better low frequency ripple suppression effect than the multi-loop PI control strategy, and the conclusion is proved by the simulation data. Finally, an experimental device of a single-stage boost inverter using MPC multi-loop composite control strategy is designed and fabricated, and the experimental results show that the proposed research scheme has good low frequency ripple suppression effect and strong adaptability to different types of loads.","PeriodicalId":45464,"journal":{"name":"Archives of Electrical Engineering","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2023-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78176185","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-06-28DOI: 10.24425/aee.2023.145414
M. A. C. Hojowski, R. O. S. Osnowski, M. A. B. Aszyński
: This elaboration presents the concept of a unidirectional DC–DC switched-capacitor converter operating as a voltage tripler. The system consists of two resonant cells with switched capacitors and chokes. This proposed converter topology achieves low voltages on semiconductor switches (diodes and transistors) compared to the classic SC series-parallel converter or the boost topology. The output voltage on the capacitors is reduced in the proposed converter because it is divided into two series-connected capacitors with asymmetric distribution. The presented results describe the analytical description of the system operation and the analytical equation for semiconductor currents. A simulation and experimental results have been performed. The system efficiency and three voltage gain values were measured in the experimental setup. The efficiency measured was also compared with the analytical determination curve for loss analysis and further converter optimization.
{"title":"Boosting resonant switched-capacitor voltage tripler","authors":"M. A. C. Hojowski, R. O. S. Osnowski, M. A. B. Aszyński","doi":"10.24425/aee.2023.145414","DOIUrl":"https://doi.org/10.24425/aee.2023.145414","url":null,"abstract":": This elaboration presents the concept of a unidirectional DC–DC switched-capacitor converter operating as a voltage tripler. The system consists of two resonant cells with switched capacitors and chokes. This proposed converter topology achieves low voltages on semiconductor switches (diodes and transistors) compared to the classic SC series-parallel converter or the boost topology. The output voltage on the capacitors is reduced in the proposed converter because it is divided into two series-connected capacitors with asymmetric distribution. The presented results describe the analytical description of the system operation and the analytical equation for semiconductor currents. A simulation and experimental results have been performed. The system efficiency and three voltage gain values were measured in the experimental setup. The efficiency measured was also compared with the analytical determination curve for loss analysis and further converter optimization.","PeriodicalId":45464,"journal":{"name":"Archives of Electrical Engineering","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2023-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85488099","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-06-28DOI: 10.24425/aee.2023.145413
Jarosław TULICKIo, T. Sobczyk, Maciej SUŁOWICZo
: This study presents a method to directly calculate the stator current Fourier spectra in double-cage induction motors to diagnose faults in rotor cages. A circuit model is developed for this purpose, allowing the modelling of any asymmetry in the outer and inner rotor cages. The model extends the conventional model of a cage motor by considering the higher space harmonics generated by the stator windings. The asymmetry of the cages is modelled by growing the resistance of any of the rotor bars. This results in various model equations, to be solved by looking for diagnostic signals. Motor current signature analysis is typically used to diagnose cage motors based on the Fourier spectra of the stator currents during steady-state operation. This study determines these spectra for double cage motors using the harmonic balance method, omitting the transient calculations. The calculation results confirmed the sensitivity of the stator current Fourier spectra as a diagnostic signal to distinguish faults in the outer and inner cages.
{"title":"Stator current spectrum analysis of a double cage induction motor with rotor asymmetry","authors":"Jarosław TULICKIo, T. Sobczyk, Maciej SUŁOWICZo","doi":"10.24425/aee.2023.145413","DOIUrl":"https://doi.org/10.24425/aee.2023.145413","url":null,"abstract":": This study presents a method to directly calculate the stator current Fourier spectra in double-cage induction motors to diagnose faults in rotor cages. A circuit model is developed for this purpose, allowing the modelling of any asymmetry in the outer and inner rotor cages. The model extends the conventional model of a cage motor by considering the higher space harmonics generated by the stator windings. The asymmetry of the cages is modelled by growing the resistance of any of the rotor bars. This results in various model equations, to be solved by looking for diagnostic signals. Motor current signature analysis is typically used to diagnose cage motors based on the Fourier spectra of the stator currents during steady-state operation. This study determines these spectra for double cage motors using the harmonic balance method, omitting the transient calculations. The calculation results confirmed the sensitivity of the stator current Fourier spectra as a diagnostic signal to distinguish faults in the outer and inner cages.","PeriodicalId":45464,"journal":{"name":"Archives of Electrical Engineering","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2023-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83469726","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-06-28DOI: 10.24425/aee.2023.145415
J. E. B. Ielecki, P. I. K. Otowski, J. A. W. Ańkowicz
: This paper describes results of tensile mechanical strength testing of two types of composite suspension line insulators from two manufacturers. In order to take into account the operation of composite insulators in overhead transmission lines with high-temperature low-sag (HTLS) conductors, the testing of their static and fatigue strength was performed at both ambient and elevated temperatures. The results showed that the static mechanical strength of composite insulators decreased with an increase in the temperature of the lower end fitting of the insulator, and proved that it followed a third-degree polynomial function. Calculations performed demonstrated that a significant cause of reduction in strength was the increase in the radial stress following the temperature increase in the crimped glass-epoxy resin core of the insulator. The results of the fatigue strength testing demonstrated that the increase in the temperature of the lower end fitting of the insulator up to 85 ◦ C degree had a little effect on the fatigue strength of the tested composite insulators.
{"title":"Impact of increased temperature of lower end-fitting of a composite long rod insulator on its mechanical strength under variable loads","authors":"J. E. B. Ielecki, P. I. K. Otowski, J. A. W. Ańkowicz","doi":"10.24425/aee.2023.145415","DOIUrl":"https://doi.org/10.24425/aee.2023.145415","url":null,"abstract":": This paper describes results of tensile mechanical strength testing of two types of composite suspension line insulators from two manufacturers. In order to take into account the operation of composite insulators in overhead transmission lines with high-temperature low-sag (HTLS) conductors, the testing of their static and fatigue strength was performed at both ambient and elevated temperatures. The results showed that the static mechanical strength of composite insulators decreased with an increase in the temperature of the lower end fitting of the insulator, and proved that it followed a third-degree polynomial function. Calculations performed demonstrated that a significant cause of reduction in strength was the increase in the radial stress following the temperature increase in the crimped glass-epoxy resin core of the insulator. The results of the fatigue strength testing demonstrated that the increase in the temperature of the lower end fitting of the insulator up to 85 ◦ C degree had a little effect on the fatigue strength of the tested composite insulators.","PeriodicalId":45464,"journal":{"name":"Archives of Electrical Engineering","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2023-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86662850","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-06-28DOI: 10.24425/aee.2023.145411
M. I. M. Ichna, A. N. W. Ilk, M. A. W. Ołoszyk, M. I. Z. Iółko, S. Alla, P. I. S. Zwangruber
: The article presents selected issues related to the development and testing of the diagnostics systems dedicated for superconducting electromagnets. The systems were constructed to assess the production quality of superconducting electromagnets of the SIS100 synchrotron, a new accelerator being built as part of the Facility of Antiproton and Ion Research (FAIR). One of the systems is used for automatic checking of electrical connection parameters and the continuity of electric circuits. The role of the second device is to assess the quality of winding insulation and to estimate circuit parameters of electromagnet coils using the capacitor discharge method. The work presents measurements and analysis of current and voltage waveforms acquired during discharges on a magnet coil simulator and on the SIS100 main dipole electromagnet.
{"title":"Practical aspects of testing superconducting electromagnets by the capacitor discharge method taking into account the non-linearity of circuit parameters","authors":"M. I. M. Ichna, A. N. W. Ilk, M. A. W. Ołoszyk, M. I. Z. Iółko, S. Alla, P. I. S. Zwangruber","doi":"10.24425/aee.2023.145411","DOIUrl":"https://doi.org/10.24425/aee.2023.145411","url":null,"abstract":": The article presents selected issues related to the development and testing of the diagnostics systems dedicated for superconducting electromagnets. The systems were constructed to assess the production quality of superconducting electromagnets of the SIS100 synchrotron, a new accelerator being built as part of the Facility of Antiproton and Ion Research (FAIR). One of the systems is used for automatic checking of electrical connection parameters and the continuity of electric circuits. The role of the second device is to assess the quality of winding insulation and to estimate circuit parameters of electromagnet coils using the capacitor discharge method. The work presents measurements and analysis of current and voltage waveforms acquired during discharges on a magnet coil simulator and on the SIS100 main dipole electromagnet.","PeriodicalId":45464,"journal":{"name":"Archives of Electrical Engineering","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2023-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85869364","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-06-28DOI: 10.24425/aee.2023.145417
{"title":"Induction machine with pole-changing winding for turbomechanisms","authors":"","doi":"10.24425/aee.2023.145417","DOIUrl":"https://doi.org/10.24425/aee.2023.145417","url":null,"abstract":"","PeriodicalId":45464,"journal":{"name":"Archives of Electrical Engineering","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2023-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77062432","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-06-28DOI: 10.24425/aee.2023.145424
{"title":"Non-linear effects of operation temperature on a field-coupled current-controlled inductance","authors":"","doi":"10.24425/aee.2023.145424","DOIUrl":"https://doi.org/10.24425/aee.2023.145424","url":null,"abstract":"","PeriodicalId":45464,"journal":{"name":"Archives of Electrical Engineering","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2023-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77356922","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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