Design Analysis of LCTLC Resonant Inverter for Two-Stage 2-Phase Supply System

Dobrucký, Branislav; Benova, Mariana; Abdalmula, Mahmud Ali Rzig; Kascak, Slavomir

doi:10.7305/automatika.54-3.187

Cited by 11 publications

(5 citation statements)

References 13 publications

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“…After realization of above measures, the total harmonic distortion of main and auxiliary-phase currents will be much better such as 12.47% at 50 Hz and 8.47% at 33.33 Hz with LC circuits, see Figure 20a for 50 Hz and Figure 20b for 33.33 Hz in Section 6. By suitable design of LC elements [20], it is possible to reach the best value of main-and auxiliary-phase current THDs (<5%) but the size of the LC elements will be rather high.…”

Section: Improving Single-leg Matrix Converter Using Lc Filtermentioning

confidence: 99%

“…Resonant LC filter can be tuned either for given frequency 50 Hz, schematic in Figure 19a,or for 'quadratic mean' frequency band 33.33 Hz, schematic in Figure 19b. Design of LC filter has been done using design procedure by Dobrucký et al [20].…”

Section: Improving Single-leg Matrix Converter Using Lc Filtermentioning

confidence: 99%

“…The number of switches is minimized, but total harmonic distortion (THD) of auxiliary-phase voltage is very high (86% at 50 Hz, 69% at 33.33 Hz) and consequently current distortions too (68 and 43%, respectively). Therefore, the improved two-phase one-leg matrix converter is completed by an LC filter [19] designed by Dobrucký et al [20]. Combination of tuned LC filter and switched capacitor brings a new quality of output quantities of converter, which provides acceptable THD and makes possible field-oriented control (FOC) of the IM motor.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Two‐Phase Inverters with Minimum Switching Devices

Dobrucký¹,

Laskody²,

Konarik³

2017

Recent Developments on Power Inverters

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The chapter deals with two-phase inverters with minimum switching devices whereby the main emphasis is devoted to 'minimum switches' converter topologies and control of passive load as well as split-single-phase induction motor. Such a converter consists of one-leg half-bridge matrix converter and the ac neutral point network as a new type of converter with two phase outputs loading the resistive-inductive or motoric loads. As harmonic content of the voltage of both phases gives very high value of total harmonic distortion (THD), roughly 86%, the current waveforms should be improved by using serial LC filter that brings much more suitable value of THD. Besides, the running capacitor creating needed phase shift (90 ) is electronically switched due to varied load. Analysis and modeling of such a new type of single-leg ac/ac converter with two phase outputs are done. The proposed topologies were simulated by Matlab/Simulink and verified in an LT spice environment. Worked-out simulation results are in good agreement with theoretical assumptions and make possible to give recommendation for the fair and right design of the chosen type of converter. Combination of mentioned measures brings a good quality of output quantities of converter and represents the main contribution of the chapter.

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Section: Improving Single-leg Matrix Converter Using Lc Filtermentioning

confidence: 99%

Section: Improving Single-leg Matrix Converter Using Lc Filtermentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Two‐Phase Inverters with Minimum Switching Devices

Dobrucký¹,

Laskody²,

Konarik³

2017

Recent Developments on Power Inverters

Self Cite

View full text Add to dashboard Cite

show abstract

“…and (8) Then the normalized impedance characteristic referred to the nominal load impedance is Design of filter elements is given in [7], harmonic distortion can be calculated using [8].…”

Section: Input Impedance and Voltage Transfer Characteristicsmentioning

confidence: 99%

Modelling of Dynamical Properties of a Resonant Converter under Step Frequence- and Loaded Converter Changes

Prazenica¹,

Kascak²,

Koscelnik³

et al. 2015

Proceedings of the 2015 International Conference on Modeling, Simulation and Applied Mathematics

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Paper deals with investigation of two problems: frequency step changes, and step switching-off of the load of LCTLC resonant inverter. Since the changes of frequency in the range from f min to f max are desirable to be the input current of the LCTLC circuit not greater than nominal one, the load changes cause dangerous overvoltage spikes. Modelling, theoretical analysis and computer simulation are used for the solution of those phenomena. Simulation experiment results confirming theoretical assumptions are given in the paper.

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“…L1C1 and L2C2 resonant circuits are tuned for basic harmonics. DC component of input voltage is filtered by capacitor (C1) (Dobrucky et al, 2014).The fact, that resonant and switching frequencies are the same provides invariance of output voltage in dependency on the load (Dobrucky et al, 2012). Magnetic circuit of L 1 has non-linear behavior, thus during overload conditions of the converter the inductor will saturate.…”

mentioning

confidence: 99%

Analysis of non-linear inverter circuitry of LCTLC topologie

Dobrucký

Frivaldský

Koscelnik

2015

COMPEL

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Purpose -Many electric circuits feature some type of non-linearity of their used devices. Non-linear resistors or inductors could be typical examples. Also, all semiconductor devices are in their nature non-linear ones. The simulation models are very important parts of the design of the devices in various fields of industry. Multiply (multiple) simulation, verified by the measurement on the physical sample, help to improve the converter design by understanding the current and voltage behavior of non-linear elements. The paper aims to discuss these issues. Design/methodology/approach -Mathematical model of LCTLC inverter was made. Fictitious exciting function was applied on LCTLC inverter model. The non-linear inductance with the real core EFD model has been created and consequentially used for MatLab simulation experiments. MatLab and OrCAD/PSpice simulation results were compared with experimental measurements carried out on physical sample. Findings -The authors have found how to simulate non-linear resonant circuits within mathematical apparatus using fictitious exciting function method. The authors provided comparisons between proposed simulation mathematical model and relevant physical sample. Multiply simulations can help to improve the converter design by understanding the current and voltage behavior of non-linear elements.Research limitations/implications -The proposed method is applicable for simulation purposes. The only limitation is that MatLab model does not include hysteresis curve of the core, therefore it has to be modeled. Practical implications -The design of power supplies (switched mode power supplies, UPS and resonant inverter). Originality/value -Research in the area of behaviors of non-linear components in resonant circuits.

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Design Analysis of LCTLC Resonant Inverter for Two-Stage 2-Phase Supply System

Cited by 11 publications

References 13 publications

Two‐Phase Inverters with Minimum Switching Devices

Two‐Phase Inverters with Minimum Switching Devices

Modelling of Dynamical Properties of a Resonant Converter under Step Frequence- and Loaded Converter Changes

Analysis of non-linear inverter circuitry of LCTLC topologie

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