scholarly journals Phase and Neutral Current Ripple Analysis in Three-Phase Four-Wire Split-Capacitor Grid Converter for EV Chargers

Electronics ◽  
2021 ◽  
Vol 10 (9) ◽  
pp. 1016
Author(s):  
Riccardo Mandrioli ◽  
Manel Hammami ◽  
Aleksandr Viatkin ◽  
Riccardo Barbone ◽  
Davide Pontara ◽  
...  
Keyword(s):  
Pulse Width ◽  
Pulse Width Modulation ◽  
Neutral Current ◽  
Experimental Tests ◽  
Single Carrier ◽  
Three Phase ◽  
Split Capacitor ◽  
Current Ripples ◽  
Sinusoidal Pulse Width Modulation ◽  
Current Ripple

The current switching ripple in a three-phase four-wire split-capacitor converter is analyzed in this paper for all the four ac output wires in relation to both balanced and unbalanced working conditions. Specifically, analytical formulations of the peak-to-peak and root mean square (RMS) current ripples are originally evaluated as a function of the modulation index, separately for the three phases and the neutral wire. Initially, the single-carrier sinusoidal pulse width modulation (PWM) technique is outlined, as it generally concerns a straightforward and effective modulation. With the aim of mitigating the current ripple in the neutral wire, the interleaved multiple-carrier PWM strategy is adopted, also avoiding any repercussion on the phase one. Numerical simulations and experimental tests were carried out to verify all the analytical developments.

scholarly journals AC Current Ripple in Three-Phase Four-Leg PWM Converters with Neutral Line Inductor

Energies ◽  
2021 ◽  
Vol 14 (5) ◽  
pp. 1430
Author(s):  
Aleksandr Viatkin ◽  
Riccardo Mandrioli ◽  
Manel Hammami ◽  
Mattia Ricco ◽  
Gabriele Grandi
Keyword(s):  
Numerical Simulations ◽  
Pulse Width Modulation ◽  
Neutral Line ◽  
Experimental Tests ◽  
Performance Comparison ◽  
Design Parameters ◽  
Switching Frequency ◽  
Three Phase ◽  
Ac Current ◽  
Current Ripple

This paper presents a comprehensive study of peak-to-peak and root-mean-square (RMS) values of AC current ripples with balanced and unbalanced fundamental currents in a generic case of three-phase four-leg converters with uncoupled AC interface inductors present in all three phases and in neutral. The AC current ripple characteristics were determined for both phase and neutral currents, considering the sinusoidal pulse-width modulation (SPWM) method. The derived expressions are simple, effective, and ready for accurate AC current ripple calculations in three- or four-leg converters. This is particularly handy in the converter design process, since there is no need for heavy numerical simulations to determine an optimal set of design parameters, such as switching frequency and line inductances, based on the grid code or load restrictions in terms of AC current ripple. Particular attention has been paid to the performance comparison between the conventional three-phase three-leg converter and its four-leg counterpart, with distinct line inductance values in the neutral wire. In addition to that, a design example was performed to demonstrate the power of the derived equations. Numerical simulations and extensive experimental tests were thoroughly verified the analytical developments.

Performance Analysis of FPGA based Diode Clamped Multilevel Inverter Fed Induction Motor Drive using Phase Opposition Disposition Multicarrier Based Modulation Strategy

2017 ◽  
Vol 8 (4) ◽  
pp. 1512
Author(s):  
Nunsavath Susheela ◽  
Satish Kumar
Keyword(s):  
Induction Motor ◽  
Pulse Width ◽  
Pulse Width Modulation ◽  
Multilevel Inverter ◽  
Multilevel Inverters ◽  
Modulation Technique ◽  
Three Phase ◽  
Field Programmable ◽  
Load Simulation ◽  
Sinusoidal Pulse Width Modulation

<p>Multilevel inverters (MLI) are becoming more popular over the years for medium and high power applications because of its significant merits over two level inverters. This paper presents an implementation of multicarrier based sinusoidal pulse width modulation technique for three phase seven level diode clamped multilevel inverter.  This topology is operated under phase opposition disposition pulse width modulation technique. The performance of three phase seven level diode clamped inverter is analyzed for induction motor (IM) load.  Simulation is performed using MATLAB/SIMULINK. Experimental results are presented to validate the effectiveness of the operation of the diode clamped multilevel inverter using field programmable gate array.</p>

scholarly journals Analysis and Minimization of Output Current Ripple for Discontinuous Pulse-Width Modulation Techniques in Three-Phase Inverters

Energies ◽  
2016 ◽  
Vol 9 (5) ◽  
pp. 380 ◽  
Author(s):  
Gabriele Grandi ◽  
Jelena Loncarski ◽  
Milan Srndovic
Keyword(s):  
Pulse Width ◽  
Pulse Width Modulation ◽  
Output Current ◽  
Three Phase ◽  
Modulation Techniques ◽  
Current Ripple

scholarly journals Designing of Three Level 3 Phase Inverter Using Improved SPWM Modulation for different Loads

2021 ◽  
Vol 12 (3) ◽  
pp. 4513-4520
Author(s):  
Anshu Sharma Et.al
Keyword(s):  
Pulse Width ◽  
Pulse Width Modulation ◽  
Harmonic Distortion ◽  
Phase Inverter ◽  
Multilevel Inverters ◽  
Three Phase ◽  
Level 3 ◽  
Sinusoidal Pulse Width Modulation ◽  
Load Conditions ◽  
Fft Analysis

Many high voltage applications require three-phase inverters.  The major challenge in inverter designing is the mitigation of harmonic distortion (HD) to achieve better inverting performance. Usually, sinusoidal pulse width modulation (SPWM) is widely used to trigger the inverting switches for controlling the total HD performance in the inverter. To provide the option of multiple operating ranges the multilevel inverters are designed for higher voltage operations. This paper contributes in two passes, first, an improved SPWM modulation is generated for designing the three levels inverter. Then in the second pass, the performance of the THD is evaluated under the different load conditions using V-I measurement. THD is present in the system due to the use of switches. Therefore, this paper has evaluated the performance of the proposed improved SPWM based multilevel inverter for analysis. In order to improve the performance, the modulation index of the SPWM block is varied. The performance of the component report is also presented in the short..the output waveform of the line current and the voltage are compared; The FFT analysis is done to evaluate the comparison of THD performance. It is concluded that improving the SPWM performance and the lording conditions may improve the THD performance also.

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