Design of New Duty-Cycle Modulator Structures for Industrials Applications, an Alternative to Pulse-Width Modulation

Ngaleu, Gildas Martial; Kom, Charles Hubert; Yeremou, Aurélien Tamtsia; Eke, Samuel; Nanfak, Arnaud

doi:10.18280/ejee.230203

Cited by 4 publications

(6 citation statements)

References 12 publications

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“…This structure, although functional and allowing low-frequency operation, has some drawbacks, among which: The non-linearity of the function linking the duty-cycle to the control signal and the dependence of the duty-cycle on the values of the passive components [11].…”

Section: Duty-cycle Modulation (Dcm)mentioning

confidence: 99%

“…[3] [6] [7] [8] are available in the literature. Modulation theory has a major research area in signal transmission, signal processing, Analog-to-Digital Conversion (ADC), Digital-to-Analog Conversion (DAC) and control of power electronic converters and continues to attract considerable attention and interest [9] [10] [11]. The switching modulation which includes Sigma-Delta Modulation (SDM), Pulse Width Modulation (PWM) and Duty-Cycle Modulation (DCM) is a type of modulation widely used for industrial applications [11].…”

Section: Introductionmentioning

confidence: 99%

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A New Control Approach of a Three-Phase Inverter Two Levels

Yonga¹,

Welba²,

Louossi³

et al. 2022

OJEE

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In this paper, we present the study, modelling and simulation of the duty cycle modulation (DCM) based on SVPWM control technique using Matlab/Simulink software. It is one of the most advanced control techniques of space vector modulation (SVM), which can be used for controlling static converters or for controlling electrical machines to achieve better dynamic performance. DCSVM is a control technique that generates control signals for the two-level voltage converter as well as for the intermediate times. The main advantage of this control technique is the reduction of the number of calculations, especially for the trigonometric functions and the generation of the reference voltage. In order to reduce the computational effort, we have designed a DCSVM controller that is able to faithfully reproduce the same vectors and output quantities as a classical SVM. In order to test the functionality and validity of the DCSVM control, we have developed different simulations that result in a total harmonic distortion (THD) of the voltage and current of 41.19% and 15.19% respectively with fundamental values of 61.51 V for the voltage and 2.80 A for the current; in contrast to the SVM which gives 47.27 V for the voltage and 2.01 A for the current with THDs of 77.16% for the voltage and 16.00% for the current. This results in an improvement in the distortion rate of around 25.5%. The results obtained are very satisfactory. The DCSVM is a real competitor to the SVM and its various variants.

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Section: Duty-cycle Modulation (Dcm)mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A New Control Approach of a Three-Phase Inverter Two Levels

Yonga¹,

Welba²,

Louossi³

et al. 2022

OJEE

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“…In normal operation, for a constant excitation current, the expressions of the average excitation voltages for the double quadrant chopper and proposed structures are described by Equations ( 13) and (14).…”

Section: Voltage Regulationmentioning

confidence: 99%

A novel brushless de‐excitation system for synchronous generators using a buck chopper with a freewheeling discharge resistor

Ngaleu

Yeremou

Kom

et al. 2022

IET Electric Power Appl

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A new de‐excitation system for advanced brushless excitation based on a synchronous generator is presented. The proposed system uses a discharge resistor in series with a freewheeling diode of a buck chopper. It improves the reliability of the entire power plant and can be used on several excitation systems. It can be used in case of programmed shutdown of the generator and also shows good results in voltage regulation without destroying the efficiency of the excitation system under nominal operation. An analysis of the system has allowed us to suggest a methodology to obtain the appropriate value of the discharge resistance to be used. The validation of the proposed system has been done through simulations in the Matlab/Simulink environment, supported by experimental tests.

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“…In this part, the modulation technique that applied to control of 31levels inverter is explained. Generally, there are four modulation strategies control of the multilevel inverters such as PWM, Space Vector Modulation (SVM), Duty Cycle Modulation (DCM) [10] and staircase modulation technique [11][12][13][14][15][16][17]. The PWM, SVM and DCM techniques are used for the high switching frequency applications that make high power losses.…”

Section: Modulation Techniquementioning

confidence: 99%

Control of Reduced Switches Count and Classical Multilevel Inverters: a Comparison

et al. 2022

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Multilevel inverter has appeared as one of the important topologies in the area of high power and medium voltage because it can efficiently realize lower harmonics with reduced switching frequency. These Multilevel inverters (MLI) improve the energy quality shaped by producing many voltage levels. However, improving the quality of the output voltage of a multilevel inverter requires many switches, which tend to weigh down the structure and make it complex to control. This work deals with a comparison in terms of the spectral content of two configurations of thirty-one-level inverters for injection into the electrical grid. The first configuration is a classical cascaded H-bridge and the second one is a reconfigured Packed U-Cell (PUC) multilevel inverter. The classical configuration requires sixteen switches while the second uses only ten ones. The control technique based on the half-height modulation was performed and the Total Harmonic Distortion (THD) is calculated for each topology. For the PUC, we got a THD equal to 2.61% while we got 2.72% for the cascaded H-bridge. These results obtained in the MATLAB/Simulink environment, show that the reconfigured structure of the PUC inverter is a good candidate for injection into the electrical network.

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Design of New Duty-Cycle Modulator Structures for Industrials Applications, an Alternative to Pulse-Width Modulation

Cited by 4 publications

References 12 publications

A New Control Approach of a Three-Phase Inverter Two Levels

A New Control Approach of a Three-Phase Inverter Two Levels

A novel brushless de‐excitation system for synchronous generators using a buck chopper with a freewheeling discharge resistor

Control of Reduced Switches Count and Classical Multilevel Inverters: a Comparison

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