New phase-shifted soft-switching PWM high-frequency series resonant inverters' topologies and their practical evaluations

Nagai, Shigekazu; Michihira, Masakazu; Nakaoka, Mutsuo

doi:10.1049/cp:19940977

Cited by 11 publications

(4 citation statements)

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“…A voltage-source series-resonant inverter (SRI) is well used for induction heating systems because of its simple power circuit topology and because many different control techniques are suitable to regulate its output current or power [1][2][3][4][5][6][7][8][9][10][11]. Various control techniques have been proposed to provide soft-switching operation modes of SRI transistors.…”

Section: Introductionmentioning

confidence: 99%

Combined PS-PDM control method for voltage-source seriesresonant inverter

Herasymenko¹

2021

ELECTROTECHNICAL REVIEW

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This paper proposes a new control method for a voltage-source series-resonant inverter (SRI) of the induction heating system. The proposed method of control is based on combining the phase-shift (PS) and pulse-density-modulation (PDM) controls. The main feature of this control method is that the current regulation for pulse density in the range from 0.5 to 1 is provided by only the traditional PDM control and in the range from 0 to 0.5 -with the PS control and constant density equal to 0.5 of the PDM control. Theoretical analysis shows that using the proposed control method can reduce the peak-to-peak current fluctuation and increase the minimum peak current of the SRI, compared with the traditional PDM control. The results of numerical computations are in good agreement with the results of simulations. Experiments were carried out to confirm the practical applicability of the proposed control method for series-resonant inverters for induction heating application.Streszczenie. W artykule zaproponowano nową metodę sterowania falownikiem rezonansowym szeregowym ze źródłem napięcia (SRI) systemu ogrzewania indukcyjnego. Proponowana metoda sterowania opiera się na połączeniu sterowania przesunięciem fazowym (PS) i modulacji gęstości impulsów (PDM). Główną cechą tej metody sterowania jest to, że regulację prądu dla gęstości impulsów w zakresie od 0,5 do 1 zapewnia tylko tradycyjne sterowanie PDM, a zakresie od 0 do 0,5 -ze sterowaniem PS i stałą gęstością. Analiza teoretyczna pokazuje, że zastosowanie proponowanej metody sterowania może zmniejszyć wahania prądu międzyszczytowego i zwiększyć minimalny prąd szczytowy SRI w porównaniu z tradycyjnym sterowaniem PDM. (Połączona metoda sterowania PS-PDM dla falownika rezonansowego szeregowego ze źródłem napięcia)

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Section: Introductionmentioning

confidence: 99%

Combined PS-PDM control method for voltage-source seriesresonant inverter

Herasymenko¹

2021

ELECTROTECHNICAL REVIEW

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“…The use of voltage-source series-resonant inverters (SRIs) as power supplies for induction heating systems is a very cost-effective solution since regulation of the output current or power of the SRI is possible by the SRI itself with using various control methods. Many different control techniques have been proposed for regulating the SRI output current such as pulse-width modulation [1,2], pulse-frequency modulation [3,4], phase-shift control [5][6][7][8][9], pulse-density modulation (PDM) [10][11][12], etc. To achieve high efficiency of the SRI and control over a wide power range, it is sensible to use control methods that can provide zero-voltage switching (ZVS) and/or zero-current switching (ZCS).…”

Section: Introductionmentioning

confidence: 99%

Study of the suitable value of dead-time between control signals of transistors for a series-resonant inverter with phase-shift control in induction heating systems

Herasymenko

2021

Eureka: PE

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Induction heating provides contactless, energy-efficient, accurate, and fast heating of electrically conductive materials. Due to its advantages, IH is increasingly used in different fields such as industry, medicine, and the household sector. High-frequency transistor converters for the induction heating system are often based on series-resonant inverters. This paper analyzes a phase-shift-controlled voltage-source series-resonant inverter for induction heating systems. Mathematical analysis was performed in order to obtain the expressions that describe the output current of the phase-shift-controlled series-resonant inverter in the steady-state mode. Based on the analysis and the obtained expressions of the output current, analytical expressions of the dead-time between the transistors’ control signals of the SRI are obtained. The analytical expressions for determining the value of the dead-time are obtained for two cases: 1) zero value of the phase-shift; 2) the phase shift is greater than zero. To verify the obtained analytical expressions of the output current, validation was performed in the MATLAB/Simulink environment by comparing the peak current values. The verification showed the high accuracy of the obtained expressions, the deviation between the calculated and simulated values of the peak current is less than 0.1 %. The made simplifications of the dead-time expressions also were verified by calculation, the deviation between the calculated values of the drain-to-source voltage at the end of the commutation and the expected value is no more than 3.6 %. The SRI prototype has been designed and implemented in order to validate the analytical and simulation results

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“…The amplitudes of both frequencies are independently controllable, which allows separate regulation of the respective shares of the output power of both frequencies, according to the requirements of the workpiece. Power regulation can be achieved by using different control techniques [16][17][18][19]. This paper presents the mathematical analysis of the dual-frequency load current of a transistor converter for induction heating systems.…”

Section: Introductionmentioning

confidence: 99%

Mathematical analysis of dual-frequency load current of two-inverter power supply for induction heating systems

Herasymenko¹

2021

ELECTROTECHNICAL REVIEW

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The aim of this research work is to obtain analytical expressions that allow analyzing the dual-frequency current of the induction coil, as well as, the currents of the inverters for the "two inverter power supplies" converter topology. To take into account frequency-dependent parameters of an induction heater load, their implementation is shown through series-parallel connections of frequency-independent resistances and inductances. A simulation study is performed to verify the obtained analytical expressions of the currents. Streszczenie. Celem artykułu było otrzymanie analitycznego opisu umożliwiającego analizę prądu podwójnej częstotliwości stosowanego w nagrzewaniu indukcyjnym. Analizowano prąd w cewce oraz współpracującego z nią przekształtnika. Przeprowadzono też symulację potwierdzającą model analityczny. (Analiza matematyczna dwuczęstotliwościowego systemu nagrzewania indukcyjnego)

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New phase-shifted soft-switching PWM high-frequency series resonant inverters' topologies and their practical evaluations

Cited by 11 publications

References 0 publications

Combined PS-PDM control method for voltage-source seriesresonant inverter

Combined PS-PDM control method for voltage-source seriesresonant inverter

Study of the suitable value of dead-time between control signals of transistors for a series-resonant inverter with phase-shift control in induction heating systems

Mathematical analysis of dual-frequency load current of two-inverter power supply for induction heating systems

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