Improving the harmonic composition of output voltage in multilevel inverters under an optimum mode of amplitude modulation

Plakhtii, Oleksandr; Nerubatskyi, Volodymyr; Sushko, Dmytro; Hordiienko, Denys; Khoruzhevskyi, Hryhorii

doi:10.15587/1729-4061.2020.200021

Cited by 8 publications

(5 citation statements)

References 27 publications

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“…In this case, the finite element method was used, which is implemented in the SolidWorks Simulation (CosmosWorks) software package [16][17][18][19]. When compiling the finite element model, spatial tetrahedrons were used [20][21][22][23][24]. To determine the optimal number of elements, the graphic-analytical method was used [25][26][27].…”

Section: Results Of Determining the Strength Indicators Of The Load-bmentioning

confidence: 99%

Study of Loading of the Load-Bearing Structure of Hopper Wagons on Y25 Bogies

et al. 2021

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To increase the efficiency of using railway transport, the possibility of using new designs of bogies, for example, Y25 under "wide gauge" wagons was considered. In order to substantiate the proposed solution, mathematical modeling of the dynamic loading of the hopper wagon Y25 bogies was carried out. A hopper wagon for the transportation of pellets and hot sinter model 20-9749 built by the State Enterprise "Ukrspetsvagon" (Ukraine) was chosen as a prototype. The simulation results showed that the use of Y25 bogies for hopper wagons allows to reduce the acceleration of its load-bearing structure, in comparison with the use of conventional 18100 bogies, by 36 %. Other performance indicators are also significantly improved. The use of Y25 bogies for hopper wagons with actual parameters allows to reduce the acceleration of its load-bearing structure, in comparison with the use of conventional 18100 bogies, by 28 %. The determination of the main indicators of the strength of the bearing structure of the hopper wagon Y25 bogie was carried out. The calculation was carried out in the SolidWorks Simulation software package (CosmosWorks), (France), which implements the finite element method. The calculations showed that the maximum equivalent stresses in the load-bearing structure of a hopper wagon with nominal parameters are 17 % lower than the stress acting in the load-bearing structure of a wagon on bogies 18–100 V of the load-bearing structure of a hopper wagon with actual parameters, the maximum equivalent stresses are 12 % lower per voltage in the load-bearing structure on bogies 18100. The conducted research will help to reduce the load on the load-bearing structures of hopper wagons in operation, improve the dynamics and strength indicators, as well as their service life

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Section: Results Of Determining the Strength Indicators Of The Load-bmentioning

confidence: 99%

Study of Loading of the Load-Bearing Structure of Hopper Wagons on Y25 Bogies

et al. 2021

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“…Generation of sinusoidal voltage requires a clear understanding of the magnitude and order of harmonics that need to be reduced, namely, voltage inverter harmonics [35,36]. The typical waveform and harmonic spectrum of the output phase voltage of the three-phase PWM voltage inverter are given in Fig.…”

Section: Analytical Dependences Of the Values Of The Sine Filter Withmentioning

confidence: 99%

A method for calculating the parameters of the sine filter of the frequency converter, taking into account the criterion of starting current limitation and pulse-width modulation frequency

Nerubatskyi

Plakhtii

Hordiienko

et al. 2021

EEJET

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An analysis of the method for ensuring the sinusoidality of the output voltage in power generation systems with self-commutated voltage inverters under the requirements of the international standard IEEE-519 is presented. In a number of programs, especially low-power generation systems, a low-cost solution is needed to provide the sinusoidal waveform of the output voltage with the total harmonic distortion of 5 %. This solution is to use two-level voltage inverters with an output sine LC filter. However, the feature of the sine filter with the frequency converter is that the PWM frequency affects the spectrum of higher harmonics of the output voltage. In addition, there is the starting current of the filter capacitor, which can disable the power switches of the voltage inverter. The developed method for calculating the values of the LC filter with the two-level voltage inverter in the PWM mode is presented meeting the requirements of the international standard IEEE-519, taking into account the modulation frequency and limitation of the starting current of the filter capacitor. To confirm the required quality of the output voltage of the two-level voltage inverter with the sine filter, an appropriate simulation model was created in the Matlab/Simulink computer simulation environment. The oscillograms and harmonic analysis of the input and output voltages of the sine filter, which showed the total harmonic distortion of 1.88 %, are presented. A physical prototype of the investigated system was created on the basis of a 5.5 kW OVEN PChV203-5K5-V frequency converter (Ukraine). Using the SIGLENT SDS1104X-E oscilloscope (China), the real waveform and the results of the harmonic analysis of the sine filter output voltage, confirming the implementation of the necessary sinusoidality criteria, were obtained

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“…To determine the stresses from the static weight load of the supporting structure of the flat wagon, a strength calculation was carried out using the finite element method in the SolidWorks simulation software package (CosmosWorks) [22][23][24][25]. Spatial isoparametric tetrahedrons were taken as the finite elements.…”

Section: The Presentation Of the Main Content Of The Studymentioning

confidence: 99%

Determination of the Vertical Load on the Carrying Structure of a Flat Wagon with the 18–100 and Y25 Bogies

et al. 2021

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The study deals with determination of the vertical load on the carrying structure of a flat wagon on the 18–100 and Y25 bogies using mathematic modelling. The study was made for an empty wagon passing over a joint irregularity. The authors calculated the carrying structure of a flat wagon with the designed parameters and the actual features recorded during field tests. The mathematical model was solved in MathCad software. The study found that application of the Y25 bogie for a flat wagon with the designed parameters can decrease the dynamic load by 41.1% in comparison to that with the 18–100 bogie. Therefore, application of the Y25 bogie under a flat wagon with the actual parameters allows decreasing the dynamic loading by 41.4% in comparison to that with the 18–100 bogie. The study also looks at the service life of the supporting structure of a flat wagon with the Y25 bogie, which can be more than twice as long as the 18–100 bogie. The research can be of interest for specialists concerned with improvements in the dynamic characteristics and the fatigue strength of freight cars, safe rail operation, freight security, and the results of the research can be used for development of innovative wagon structures.

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Improving the harmonic composition of output voltage in multilevel inverters under an optimum mode of amplitude modulation

Cited by 8 publications

References 27 publications

Study of Loading of the Load-Bearing Structure of Hopper Wagons on Y25 Bogies

Study of Loading of the Load-Bearing Structure of Hopper Wagons on Y25 Bogies

A method for calculating the parameters of the sine filter of the frequency converter, taking into account the criterion of starting current limitation and pulse-width modulation frequency

Determination of the Vertical Load on the Carrying Structure of a Flat Wagon with the 18–100 and Y25 Bogies

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