Dead time influence on operating modes of transistor resonant inverter with pulse frequency modulation (PFM)

Antchev, Mihail; Antchev, Hristo

doi:10.11591/ijpeds.v10.i4.pp1815-1822

Cited by 2 publications

(2 citation statements)

References 9 publications

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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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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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“…To overcome this issue, the deadtime is introduced, which assures that the switches of one leg are not closed at the same time. Deadtime is realized by delaying the rising edge of the pulses provided to the switches [2]. Dead-time creates a nonlinear converter characteristic that causes a distortion of the output voltage [3], i.e., it generates a loworder harmonics in the output voltage of the inverter, which leads to additional losses which increase significantly with increasing switching frequency [4].…”

Section: Introductionmentioning

confidence: 99%

Improved dead-time elimination method for three-phase power inverters

Aboelsaud

Ibrahim

Garganeev

et al. 2020

IJPEDS

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In real inverters' operations, it is essential to insert delay time in the pulses provided to the inverter switches to protect the DC link against the short circuits. From this situation, the dead time phenomenon is introduced that causes undesirable performance and distortion of the output signal. Previously, researchers have proposed various schemes for compensating or eliminating dead-time. In this paper, a new dead-time elimination (DTE) scheme is proposed with a guarantee algorithm to eliminate dead-time and overcome the issues produced at the zero-currents-crossing point (ZCC). This method does not require additional hardware or filters to determine the polarity of the output current, and its principle is very simple to implement. The developed DTE method completely removes the dead-time issues on the magnitude and phase of the output voltage, and avoid the problems which can be induced around the ZCC. The results confirm the effectiveness and safety of this method.

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Dead time influence on operating modes of transistor resonant inverter with pulse frequency modulation (PFM)

Cited by 2 publications

References 9 publications

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

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

Improved dead-time elimination method for three-phase power inverters

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