Design Procedure of Static Characteristics of the Resonant Converters

Pavlov, Gennadiy; Obrubov, Andrii V.; Vinnychenko, Iryna

doi:10.1109/ukrcon53503.2021.9575698

Cited by 6 publications

(4 citation statements)

References 6 publications

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“…The established theoretical dependences of the operating frequency (10) to (13) have an acceptable accuracy for engineering calculations for Q=5 or more Q factors. For a more accurate theoretical determination of the dependences of self-generation frequencies at low Q factor of the circuit (Q<5), it is advisable to use the method of superimposing the components of the circuit current [17], applicable for studying the parameters of stationary processes in the resonant inverter circuit.…”

Section: Discussion Of Results Of Studying the Self-generating Resona...mentioning

confidence: 99%

Optimizing the operation of charging self-generating resonant inverters

Pavlov

Obrubov

Vinnychenko

2022

EEJET

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This paper reports a study of the electromagnetic processes in self-generating resonant inverters, as well as the derivation of analytical dependences of their operating frequency on the parameters of the resonance circuit and positive feedback circuits, in order to expand the range of their output power and optimize their operation. The object of research is electromagnetic processes in resonant inverters, in which autogeneration of resonant current oscillations is carried out in the process of operation. The results of studying the electromagnetic processes in sequential self-generating resonant inverters based on the characteristics of the resonant circuit are presented. The operating modes of the inverters have been optimized by setting certain ratios between the operating and resonant frequencies at unstable circuit parameters. The ratio of operating and resonant frequencies is set through the use of phase-shifting filters in a positive feedback loop along the circuit current and correspond to the autogenerator mode. The conditions of self-generation in converters with a sequential resonant circuit have been determined. Mathematical expressions have been built for determining the coefficients of positive feedback on the current and voltage of the resonant circuit, which made it possible to derive target analytical dependences. Analytical dependences of the established operating frequency on the parameters of the circuit and phase-shifting filters have been established. Based on the obtained dependences, the parameters of the positive feedback circuits have been determined in order to ensure a wide range of output power of the converters. The resulting dependences make it possible to carry out theoretical calculations whose results repeat the results of model experiments. Phase characteristics of the resonance circuit and various phase-shifting filters, which can be part of a serial resonant converter, have been constructed. The results of the analysis reported here could be used in the design of resonant inverters with unstable circuit parameters, in particular in inductive chargers.

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Section: Discussion Of Results Of Studying the Self-generating Resona...mentioning

confidence: 99%

Optimizing the operation of charging self-generating resonant inverters

Pavlov

Obrubov

Vinnychenko

2022

EEJET

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“…That is, they do not consider the overall dynamic pattern. In [3,4], the authors pay attention to electromagnetic processes but carry out calculations only of their static characteristics. In the conversion equipment, considerable attention is also paid to the dynamics of resonant converters [5].…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

Determining the dynamic model of the charging resonant converter with inductive coupling by an experimental-analytical method

Pavlov

Obrubov

Vinnychenko

2022

EEJET

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This paper reports the advanced experimental-analytical method for determining the dynamic model of resonant converters of electricity. The object of research is semiconductor resonance converters and methods for analyzing their dynamics. The well-known experimental-analytical method for determining a dynamic model implements the sequence «experiment – analytics – dynamic model» when the structure of the system may be unknown. Then it is necessary to determine the structures and parameters of many dynamic models, among which the optimal ones will be selected. This makes it difficult to establish usable patterns. Therefore, it is advisable to develop this method, according to which it is proposed to determine the parameters of the dynamic model according to the following sequence. First, carry out the analysis of the converter circuit and construct the dynamic models of sub-circuits. Next, an experiment is conducted with a simulation structural model of the converter, which is an input model of identification. After that, procedures are carried out for identifying and selecting optimal dynamic models among a set of initial identification models, as a result of which equivalent dynamics equations, gear ratios, and transfer functions of the selected converter models are obtained. In the proposed modification of the method, the converter model is determined in advance, and at the identification stage it is enough to determine only its parameters. More simply, patterns are identified, and the number of initial identification models is significantly reduced. The results of using the proposed method on the example of determining the dynamic model of the charging resonance converter with inductive coupling between the charger and the battery of an autonomous object are given. The results of the presented analysis can be used in the design of resonant contactless chargers.

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“…In this aspect, there are numerous studies dedicated to the analysis, design, and prototyping of a specific power electronic device, taking into account the specifics of its application. Static characteristics of resonant converters operating in resonance modes are presented in [19]. They were obtained by analyzing idealized series resonant circuit converters under various combinations of connected voltage sources.…”

Section: Introductionmentioning

confidence: 99%

An Innovative Design Approach for Resonant DC/AC Converters, Based on Symmetry in Their Operating Modes

Hinov

2023

Symmetry

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The manuscript presents an innovative approach for the engineering design of resonant DC/AC converters used as sources of high-frequency electricity for a variety of needs: industrial and domestic applications, wireless power transmission, high-performance lighting, and more. The methodology is based on the generalized consideration of electromagnetic processes in a series resonant RLC circuit fed by a square-wave voltage source. Due to the symmetry in the form of the current in the AC circuit of the DC/AC converter, it is possible to generalize all their possible operating modes. This was realized by applying the quasi-boundary method to the analysis of resonant DC/AC converters with and without reverse diodes operating in soft and hard switching modes. On this basis, the transfer functions of the devices, which give the relationship between their output and input voltages, are defined and analytically determined. Additionally considered are cases of resonant DC/AC converters with complex output circuits, which are applied to match the load needs and the capabilities of the power electronic device. In this sense, the basic dependencies for designing the main types of resonant DC/AC converters using series and parallel load compensation are given. The effectiveness of the proposed methods is demonstrated through several examples, and their verification and validation is achieved with simulations and prototypes. The proposed innovative design approach is applicable not only in power electronics education, but also in the design and prototyping of a whole class of power electronic devices. The unification of design methodologies formalizes and algorithmizes the design process, which is an important step for its automation and for applying various optimization procedures to achieve certain goals.

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Design Procedure of Static Characteristics of the Resonant Converters

Cited by 6 publications

References 6 publications

Optimizing the operation of charging self-generating resonant inverters

Optimizing the operation of charging self-generating resonant inverters

Determining the dynamic model of the charging resonant converter with inductive coupling by an experimental-analytical method

An Innovative Design Approach for Resonant DC/AC Converters, Based on Symmetry in Their Operating Modes

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