Reliability increase of resonance induction heating units during the fault conditions
DOI:
https://doi.org/10.15588/1607-6761-2022-3-2Keywords:
induction heating unit, resonant inverter, phase-locked loop, overvoltage protection, transfer function, first harmonic approximation, frequency controlAbstract
Purpose. To develop an automatic protection system against fault operation conditions for the resonant inverter of the induction heating unit due to absence of load.
Methodology. Resonant inverter load transfer function analysis using the first harmonic approximation, calculation of control parameters using numerical methods, computer simulation of induction heating unit. Experimental studies based on a smelter with microprocessor control in order to check the adequacy of the proposed model and protection system.
Findings. A computer model of the induction heating unit is presented, the adequacy of which was verified by the experimental results of the induction melting unit. By using this model, circuit protection circuit of the resonant inverter against low load conditions is developed, which is based on the shift of the inverter operating frequency due to the introduction of an additional shift of the phase difference between current and voltage in the feedback loop. The methodology for calculating this phase shift was created using the load transfer function of the inverter (‘capacitor bank-inductor-part’ system) and numerical methods for solving equations. The above calculation method can be used for resonant inverters of any configuration and topology. According to the computer simulation of the induction heating unit operation during fault, the developed system limits the voltage amplitude within the safe operating region of the inverter reactive elements, while in normal operating conditions the protection system does not affect the operation of the unit. The protection system successfully keeps the amplitude of current and voltage in the oscillating circuit within safe limits during low loads. The created system is simple enough for its quick implementation in existing digitally controlled units and has high speed.
Originality. Methodology to create voltage limiting system for resonant inverters of any configuration with frequency control has been developed.
Practical value. Developed protection system allows to reduce induction heating process interruption by the user. Moreover, protection system increases fault tolerance of induction heating units. Structure of proposed protection system simplifies the modernization of existing units and the development of new models using such system.
References
Duerbaum, T. First harmonic approximation including design constraints. IEEE INTELEC '98 International Telecommunications Energy Conference. DOI: 10.1109/intlec.1998.793519
A. Bucher, A., Duerbaum, T. (2010). Extended first harmonic approximation in case of LLCC converters with capacitive output filter. Melecon 2010 - 2010 15th IEEE Mediterranean Electrotechnical Conference, 1303-1308. DOI: 10.1109/MELCON.2010.
Borage, M., Tiwari, S. (2013). A 25 kW, 25 kHz Induction Heating Power Supply for MOVPE System Using L-LC Resonant Inverter. Advances in Power Electronics, . DOI: 10.1155/2013/584129
Okuno, A., Hayashi, M., Kawano, H., Nakaoka, M. (1993). Practical evaluations of load-adaptive high-frequency resonant PAM inverter using static induction power transistors for industrial induction-heating plants. Proceedings of IECON '93 - 19th Annual Conference of IEEE Industrial Electronics, 2, 1015-1020. DOI: 10.1109/IECON.1993.339135
Zerouali, S., Allag, A., Mimoune, S.M., Hamida, A.H., Khanniche, S., Feliachi, M. (2006). "An Adaptive Control Applied to Series Resonant Inverter for Induction Heating," Proceedings of the 41st International Universities Power Engineering Conference, 633-636, DOI: 10.1109/UPEC.2006.367555
Nawaz, M. (2017). A power control scheme of a medium frequency induction furnace. [PhD Thesis, University of Engineering and Technology Lahore]. Retrieved from http://prr.hec.gov.pk/jspui/handle/
//8373
Grajales, L., Lee, F.C. (1995). Control system design and small-signal analysis of a phase-shift-controlled series-resonant inverter for induction heating. Proceedings of PESC '95 - Power Electronics Specialist Conference, 1, 450-456. DOI: 10.1109/
pesc.1995.474849
Grajales, L., Sabate, J.A., Wang, K.R., Tabisz, W.A., Lee, F.C. (1993) Design of a 10 kW, 500 kHz phase-shift controlled series-resonant inverter for induction heating. Conference Record of the 1993 IEEE Industry Applications Conference Twenty-Eighth IAS Annual Meeting, 2, 843-849. DOI: 10.1109/IAS.1993.298997
Nagai, S., Nagura, H., Nakaoka, M., Okuno, A. (1993). High-frequency inverter with phase-shifted PWM and load-adaptive PFM control strategy for industrial induction-heating. Conference Record of the 1993 IEEE Industry Applications Conference Twenty-Eighth IAS Annual Meeting, 3, 2165-2172. DOI: 10.1109/IAS.1993.299167
Viriya, P., Yongyuth, N., Matsuse, K. (2008). Analysis of Two Continuous Control Regions of Conventional Phase Shift and Transition Phase Shift for Induction Heating Inverter under ZVS and NON-ZVS Operation. IEEE Transactions on Power Electronics, 23, 6, 2794-2805. DOI: 10.1109/TPEL.2008.2004037
Esteve V. et al. (2014). Improving the Reliability of Series Resonant Inverters for Induction Heating Applications. IEEE Transactions on Industrial Electronics, 61, 5, 2564-2572. DOI: 10.1109/TIE.2013.
Mishima, T., Takami, C., Nakaoka, M. (2014). A New Current Phasor-Controlled ZVS Twin Half-Bridge High-Frequency Resonant Inverter for Induction Heating. IEEE Industrial Electronics Magazine, 61, 5, 2531-2545. DOI: 10.1109/TIE.2013.2274420
Kazimierczuk, M.K., Czarkowski, D. (2011). Resonant power converters (2nd ed.). Hoboken, NJ: John Wiley & Sons, Inc.
Chudjuarjeen, S., Sangswang, A., Koompai, C. (2009). An improved LLC resonant inverter for induction heating with asymmetrical control. 2009 IEEE International Symposium on Industrial Electronics, 1612-1617. DOI: 10.1109/ISIE.2009.
Prodanov, P., Dankov, D. (2017). Reliability of power supplies for induction heating through an analysis of the states in operating modes. 2017 International Symposium on Power Electronics (Ee), 1-5. DOI: 10.1109/PEE.2017.8171671
Young-Sup Kwon, Sang-Bong Yoo, Dong-Seok Hyun. (1999). Half-bridge series resonant inverter for induction heating applications with load-adaptive PFM control strategy. APEC '99. Fourteenth Annual Applied Power Electronics Conference and Exposition. 1999 Conference Proceedings, 1, 576-581. DOI: 10.1109/APEC.1999.749738
Kalynichenko, D.V. (2019). Metod avtomatychnogo reguljuvannja parametriv ustanovky indukcijnogo nagrivu [Magisters'ka dyplomna robota, NU «ZP»]. Repozytorij NU «ZP». http://eir.zntu.edu.ua/
handle/123456789/7306
Downloads
Published
How to Cite
Issue
Section
License
Copyright (c) 2023 Denys Kalynichenko
This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.
Creative Commons Licensing Notifications in the Copyright Notices
Authors who publish with this journal agree to the following terms:
Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under aCreative Commons Attribution License that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.
Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.
Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work.
