Load Characteristics of the Serial-to-serial Resonant Converter with Pulse-number Regulation for Contactless Inductive Energy Transfer

Pavlov, Gennadiy; Pokrovskiy, Mikhail; Vinnychenko, Iryna

doi:10.1109/ieps.2018.8559590

Cited by 8 publications

(6 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…1, d) is realized by an independent generator, which, after establishing the rated mode of operation of the converter, begins to synchronize with free oscillations in the circuit, for example, when the circuit current passes through zero. An example of such a converter would be [11]. In this case, the frequency of oscillations becomes associated with the parameters of the resonance circuit, and switching conditions can be observed automatically with unstable parameters of the resonance circuit.…”

Section: Classification Of Methods Of Excitation Of Oscillations In T...mentioning

confidence: 99%

“…With certain ratios of the conversion frequency and the resonant frequency of the circuit, it is possible to achieve the conditions of soft switching of power valves with low power losses and an increase in the amplitude of oscillations as a result of resonant phenomena in the circuit, as shown in [11,12]. In [11], soft switching takes place at a constant operating frequency and a variable number of pulses; in [12], the achievement of soft switching conditions using switching keys is shown. In both cases, the operating frequency is related to the parameters of the power circuit.…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

“…Figure 6 shows the plots of these dependences. Plot 1 is calculated from (11), plot 2 -(10), plots 3-5 -(13), plot 6 -(12) for wave impedance ρ=1 and Q factor Q=2, which roughly corresponds to actual converters.…”

Section: Defining Conditions For the Self-generation Of Oscillations ...mentioning

confidence: 99%

“…9. There, for comparison with experimental plots, dashed lines are plots of theoretical dependences of self-generation frequencies, calculated from (10), (11).…”

Section: Tablementioning

confidence: 99%

See 3 more Smart Citations

Optimizing the operation of charging self-generating resonant inverters

Pavlov

Obrubov

Vinnychenko

2022

EEJET

Self Cite

View full text Add to dashboard Cite

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.

show abstract

Section: Classification Of Methods Of Excitation Of Oscillations In T...mentioning

confidence: 99%

Section: Literature Review and Problem Statementmentioning

confidence: 99%

Section: Defining Conditions For the Self-generation Of Oscillations ...mentioning

confidence: 99%

“…9. There, for comparison with experimental plots, dashed lines are plots of theoretical dependences of self-generation frequencies, calculated from (10), (11).…”

Section: Tablementioning

confidence: 99%

See 2 more Smart Citations

Optimizing the operation of charging self-generating resonant inverters

Pavlov

Obrubov

Vinnychenko

2022

EEJET

Self Cite

View full text Add to dashboard Cite

show abstract

“…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

Self Cite

View full text Add to dashboard Cite

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.

show abstract