Pakhaliuk B. Semiconductor converters with improved mass - dimensional parameters for wireless charging based on Z-source network in resonant mode

Українська версія

Thesis for the degree of Doctor of Philosophy (PhD)

State registration number

0824U003065

Thesis Registration Form

0824U003065.pdf

Applicant for

Bohdan P. Pakhaliuk

Specialization

141 - Електроенергетика, електротехніка та електромеханіка

Specialized Academic Board

ДФ11/2024 (ID6896 )

Chernihiv Polytechnic National University

Essay

Pakhaliuk B.P. Semiconductor converters with improved mass – dimensional parameters for wireless charging based on Z-source network in resonant mode. - Qualification scientific work on the rights of the manuscript. Dissertation for the degree of the Doctor of Philosophy in specialty 141 - "Electric Power Engineering, Electrotechnics and Electromechanics". - Chernihiv Polytechnic National University, Ministry of Education and Science of Ukraine; Chernihiv, 2023. The dissertation is devoted to solving an urgent scientific problem - optimization of the converter as part of a wireless energy transmission system using multi-winding solutions, namely the use of an impedance link with a minimum number of semiconductor elements, by performing analysis, calculations and implementation of software and technical methods. With the development of technology, as well as the increase in portable electrical devices, wireless power transmission technology has become very popular in recent decades. Such systems are characterized by high reliability, as they have no wires or mechanical connectors. This also improves the safety of such systems, where the impact of high humidity or other factors does not affect the energy transfer process. The absence of the need for direct mechanical contact between the receiver and the transmitter allows energy transmission systems to be placed in a sealed housing, which can multiply the resistance of such devices to any external factors. Despite the fact that the technology of wireless energy transmission has been known for more than a hundred years, the main task remains to minimize the size of the energy transmission system, while increasing its reliability and safety. The main elements that determine both the size and price of wireless power transmission systems are semiconductor and reactive components. In the course of mathematical analysis, using simulation models of coupled coils, it was determined that in terms of maintaining a fixed output power and high efficiency, it is possible to implement coupled coils with a minimum number of turns, but with a high volumetric power density. After analyzing the inverter topologies, in the course of multi-criteria comparative analysis and synthesis, a topology using an impedance link was proposed, which reduced losses in semiconductor elements and increased the reliability of the circuit due to reactive components that limit the current from the input source in the full conduction mode. This topology increases the input voltage and allows operation with voltages that are a few times higher than the input voltage. This makes it possible to transfer energy at reduced current values, thereby reducing losses in inductors and in coupled coils. Given that the proposed solution requires feedback in the battery charging system, which has a communication delay and which can affect the stability of the control system, it was proposed to use a control system using a Smith predictor. This allowed us to minimize the impact of the communication delay and expand the stability range in case of significant delay deviations. To verify the operation of the proposed wireless energy transfer solution, a low-power experimental layout was developed and analyzed under different topology configurations such as various positions of coupled coils or a configuration using an additional semiconductor key to minimize losses. A mockup of a conventional wireless power transmission solution was also developed. These solutions were compared under similar conditions, with the same input parameters and coupling coefficient ratios of the coupled coils. The proposed solution showed higher efficiency.

Thesis supervisor

Maxim A. Homenko
Oleksandr O. Husev

Official opponents

Sergei Peresada
Yuriy M. Vasetsky

Reviewers

Vadim M. Bodunov
Oleksiy M. Gorodny

Research papers

1. B. Pakhaliuk, O. Husev, V. Shevchenko, J. Zakis, K. Maksym, and R. Strzelecki, “Modified inductive multicoil wireless power transfer approach based on z-source network,” IEEE Journal of Emerging and Selected Topics in Power Electronics, vol. 9, no. 4, pp. 4906–4917, Aug. 2021.

2. V. Shevchenko, B. Pakhaliuk, O. Husev, D. Vinnikov, and R. Strzelecki, “Wireless charging station design for electric scooters: Case study analysis,” Energies, vol. 17, no. 11, p. 2472, May 2024.

3. V. Shevchenko, B. Pakhaliuk, J. Zakis, O. Veligorskyi, J. Luszcz, O. Husev, O. Lytvyn, and O. Matiushkin, “Closed-loop control system design for wireless charging of low-voltage ev batteries with time-delay constraints,” Energies, vol. 14, no. 13, p. 3934, Jun. 2021.

4. V. Shevchenko, B. Pakhaliuk, O. Husev, O. Veligorskyi, D. Stepins, and R. Strzelecki, “Feasibility study gan transistors application in the novel split-coils inductive power transfer system with t-type inverter,” Energies, vol. 13, no. 17, p. 4535, Sep. 2020.

5. B. Pakhaliuk, O. Husev, V. Shevchenko, O. Veligorskyi, and K. Kroics, “Novel inductive power transfer approach based on z-source network with compensation circuit,” in 2018 IEEE 38th International Conference on Electronics and Nanotechnology (ELNANO). IEEE, apr 2018, pp. p. 1–6.

6. B. Pakhaliuk, O. Husev, V. Shevchenko, J. Zakis, and D. Stepins, “Multivariable optimal control of wireless power transfer systems with series-parallel compensation,” in 2019 IEEE 60th International Scientific Conference on Power and Electrical Engineering of Riga Technical University (RTUCON). IEEE, Oct. 2019.

7. B. Pakhaliuk, O. Husev, R. Strzelecki, V. Shevchenko, and K. Maksym, “Comparative evaluation of multicoil inductive power transfer approaches based on z-source network,” in 2019 IEEE 2nd Ukraine Conference on Electrical and Computer Engineering (UKRCON). IEEE, Jul. 2019.

8. B. Pakhaliuk, O. Husev, R. Strzelecki, K. Tytelmaier, J. Zakis, and D. Stepins, “Optimal multivariable control for modified z-source based ipt,” in 2018 IEEE 59th International Scientific Conference on Power and Electrical Engineering of Riga Technical University (RTUCON). IEEE, Nov. 2018.

9. B. Pakhaliuk, O. Husev, R. Strzelecki, and K. Tytelmaier, “Optimal components design for modified z-source based ipt approach,” in 2018 IEEE 3rd International Conference on Intelligent Energy and Power Systems (IEPS). IEEE, Sep. 2018.

10. B. Pakhaliuk, O. Husev, V. Shevchenko, K. Kroics, D. Stepins, and R. Strzelecki, “Inductive bifilar coil based wireless charging system for autonomous electric boat,” in 2022 IEEE 31st International Symposium on Industrial Electronics (ISIE). IEEE, Jun. 2022.

11. B. Pakhaliuk, V. Shevchenko, R. Strzelecki, and J. Zakis, “Harmonics influence analysis in modified inductive multi-coil wireless power transfer approach based on z-source network,” in Комплексне забезпечення якостi технологiчних процесiв та систем, May 2021.

12. B. Pakhaliuk, V. Shevchenko, D. Stepins, and J. Zakis, “Automated multicoil coupling coefficient measurement with switched relay system,” in Комплексне забезпечення якостi технологiчних процесiв та систем, May 2020.

13. “Iндуктивний спосiб передачi енергiї на основi iмпедансної ланки в резонансному режимi,” UA patent 125 856, May 25, 2018, Пахалюк Богдан, Гусев Олександр, Шевченко Вiктор, Велiгорський Олександр.

14. “Система бездротової передачi енергiї на основi двох послiдовно включених передаввальних котушок iз середньою точно-кю,” UA patent 127 763, May 25, 2023, Пахалюк Богдан, Гусев Олександр, Шевченко Вiктор, Велiгорський Олександр.

15. V. Shevchenko, B. Pakhaliuk, and H. Oleksandr, “Review the main technologies of the wireless charging of energy accumulators for small-purchasing systems,” TECHNICAL SCIENCES AND TECHNOLOG IES, no. 4(10), pp. 133–146, 2017.

16. V. Shevchenko, B. Treiko, O. Husev, B. Pakhaliuk, and K. Oleg, “ОГЛЯД I ПОРIВНЯННЯ БАЗОВИХ ТОПОЛОГIЙ КОМПЕНСАЦIЇ ДЛЯ БЕЗДРОТОВОЇ ПЕРЕДАЧI ЕНЕРГIЇ,” TECHNICAL SCIENCES AND TECHNOLOG IES, no. 3(13), pp. 209–218, 2018

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