Analytical Calculation of DC-Link Current for N-Interleaved 3-Phase PWM Inverters Considering AC Current Ripple

Voldoire, Adrien; Schanen, Jean‐Luc; Ferrieux, Jean-Paul; Gautier, Cyrille; Saber, Christelle

doi:10.23919/epe.2019.8915183

Cited by 16 publications

(10 citation statements)

References 9 publications

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“…This assumption is perfectly valid for most of the conventional design. However, due to the aforementioned reason, the proposed approach uses a complete model, considering the AC current ripple in the computation of the RMS current of the DC bus capacitor [16] (Section II-C).…”

Section: Pre-design Methodology Of Voltage Inverters Using a Gradient...mentioning

confidence: 99%

“…The developed method takes into account the impact of the AC current ripple on the DC side, and consists in computing the Fourier transform of the current in one transistor, then the summation of the current coming from the 3 phases [16]. The current circulating in the neutral connection between the capacitive DC middle point and the AC capacitor reference point is also taken into account.…”

Section: 𝐹 𝑔𝑟𝑖𝑑mentioning

confidence: 99%

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Predesign Methodology of Voltage Inverters Using a Gradient-Based Optimization Algorithm

Voldoire

Schanen

Ferrieux

et al. 2021

IEEE J. Emerg. Sel. Topics Power Electron.

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Section: Pre-design Methodology Of Voltage Inverters Using a Gradient...mentioning

confidence: 99%

Section: 𝐹 𝑔𝑟𝑖𝑑mentioning

confidence: 99%

Predesign Methodology of Voltage Inverters Using a Gradient-Based Optimization Algorithm

Voldoire

Schanen

Ferrieux

et al. 2021

IEEE J. Emerg. Sel. Topics Power Electron.

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“…The current spectrum in the DC side of the converter is useful to evaluate the DC voltage and current ripples, as well as the RMS DC capacitor current. It is worth noting that the contribution of the AC current ripple is considered in this analytical expression [19], which is important during optimization. The AC capacitor current is computed knowing the output voltage spectrum V OUT at the terminals of the capacitor and its impedance.…”

Section: Harmonic Calculationmentioning

confidence: 99%

Three-Phase PWM Voltage-Source-Inverter Weight Optimization for Aircraft Application Using Deterministic Algorithm

et al. 2020

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In this paper, a design by optimization process is used to size a 10-kW three-phase pulse width modulation (PWM) inverter for aeronautic application. The objective function is the converter weight, which has to be minimized. Sizing constraints are the efficiency, alternating current (AC) and direct current (DC) harmonics, and thermal constraints on all devices. A deterministic algorithm is chosen since it allows obtaining quick results and dealing with a large number of variables. All equations are analytical, in order to comply with this gradient-based optimization strategy, which imposes the derivability of the models. Several optimization results using different AC inductor solutions (iron powder and ferrite) are compared. The optimized converters were built and tested experimentally to verify their performances. Semiconductor and inductor losses were measured accurately using calorimetric test benches. The optimality of the solutions was carefully verified by changing parameters.

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“…In the following explanations, spacevector modulation (SVM) is taken into account as defined in [15]. The time functions of the phase currents of Inverter1 are defined in ( 6), ( 7) and (8).…”

Section: Definition and Parameter Introductionmentioning

confidence: 99%

“…In contrast to [7], the frequency spectrum of the current is not described for a single-but for a dual-inverter. In addition to the explanations in [4,[8][9][10][11], the description of the spectrum is presented in a solved form. Therefore, a numerical integration for determining the DC-link current for any operating point of the dual-inverter becomes obsolete.…”

mentioning

confidence: 99%

Analytical Calculation of the RMS Value and the Spectrum of the DC-Link Current of a Dual-Inverter

Schiedermeier

Schlamp

Rettner

et al. 2022

IEEE Trans. Power Electron.

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This paper is focused on the analytic definition of the DC-link current of a dual-inverter. Therefore, a two-level dualinverter for driving two independent three-phase electrical motors is considered. Space-vector modulation is taken into account as the modulation method of the inverter. Based on that, an analytic description is derived for the frequency spectrum as well as for the RMS value of the DC-link current of a dual-inverter. Contrary to the current definitions known from previous publications, the expressions presented below are defined in solved form. Therefore, the use of integral or differential equation expressions is not necessary. In this way, a basis is created for calculating the DClink current without computationally intensive numerical integration processes or SPICE simulations. Furthermore, this paper includes the metrological verification of the novel expressions. The results discussed in this publication provide the basis for stabilizing the HV-DC system and for minimizing the DClink capacitor load. Thus, they enable the DC-link capacitor of a dual-inverter to be downsized. Based on the presented definition of the DC-link current in solved form, the possibility of real-time optimization is created. Furthermore, the results outlined in this paper form the foundation to derive the control optimization for a multi-phase inverter. Index Terms-Dual inverter, Voltage Source Inverter (VSI), phase shift, DC-link current, Newton-Cotes I. INTRODUCTIONHE need of regulating the flow of energy between two or more electrical motors or comparable AC-impedances and a DC-grid is given in many applications. Thereby, the use of a dual-inverter instead of two individual inverters often makes sense due to many reasons. An example of such an application can be found in the field of electrified vehicles. As explained in [1,2], drive concepts of HEVs (hybrid electric vehicles), BEVs (battery electric vehicles) and FCEVs (fuel cell electric vehicles) are often operated with at least two electric motors. This can be explained by the advantages of performance scalability, the potential of cost savings, driving dynamics advantages (4-wheel drive, torque vectoring), and the increase in efficiency in partial load operation. The use of dual-

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Analytical Calculation of DC-Link Current for N-Interleaved 3-Phase PWM Inverters Considering AC Current Ripple

Cited by 16 publications

References 9 publications

Predesign Methodology of Voltage Inverters Using a Gradient-Based Optimization Algorithm

Predesign Methodology of Voltage Inverters Using a Gradient-Based Optimization Algorithm

Three-Phase PWM Voltage-Source-Inverter Weight Optimization for Aircraft Application Using Deterministic Algorithm

Analytical Calculation of the RMS Value and the Spectrum of the DC-Link Current of a Dual-Inverter

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