Analysis and minimization of input current and voltage ripples of five-phase PWM inverters

Dahono, Pekik Argo; Deni,; Rizqiawan, Arwindra

doi:10.1109/pecon.2008.4762551

Cited by 7 publications

(3 citation statements)

References 7 publications

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“…When the Fourier analysis is carried out for the current of one branch of the inverter (i inv,a , Fig. 1), it has be considered that f (x, y) are some rectangular pulses (assuming that ω c >> ω 0 ): (10) This way, the Fourier coefficients C mn follow the next double Fourier integral:…”

Section: Double Fourier Integral Analysis Of Amentioning

confidence: 99%

Influence of PWM techniques on the DC-Link capacitor power losses of multiphase VSIs

DeMarcos

Ugalde

Andreu

et al. 2022

IECON 2022 – 48th Annual Conference of the IEEE Industrial Electronics Society

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In traction applications, particularly in transport electrification, multiphase drives are increasingly being an interesting alternative over their three-phase counterparts due to a range of advantages outweighing the additional cost, e.g. smoother torque performance, higher current capability, enhanced fault tolerance, higher efficiency and lower DC-Link current ripples. This work focuses on the impact this multiphase drives modulated by continuous and discontinuous PWM techniques have in a such a pricey and bulky component as it is the DC-Link capacitor. Taking into account that the equivalent series resistance of the DC-Link capacitor varies with frequency, the typical approximated calculation of the power losses in this component by means of the RMS value of the current is often inaccurate. Therefore, the spectral analysis of the DC-Link current has been carried out for the five-phase two-level VSI in order to estimate more accurately the power losses in the DC-Link capacitor and see which PWM modulation technique benefits this bulky and expensive component depending on its ESR curve and the selected switching frequency.

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Section: Double Fourier Integral Analysis Of Amentioning

confidence: 99%

Influence of PWM techniques on the DC-Link capacitor power losses of multiphase VSIs

DeMarcos

Ugalde

Andreu

et al. 2022

IECON 2022 – 48th Annual Conference of the IEEE Industrial Electronics Society

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show abstract

“…In terms of the related existing literature, some researchers have reported on schemes to reduce the higher frequency ripple component at the DC input to multi-phase VSIs [5][6][7]. However, they do not then carry the analysis or investigation forward to quantify the potential reduction in VSI DC-link capacitance and current rating.…”

Section: Introductionmentioning

confidence: 99%

Multi‐phase VSI DC‐link capacitor considerations

Nie

Schofield

2019

IET Electric Power Applications

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The modelling, control, switching schemes, novel applications, etc. of multi-phase voltage source inverters (VSIs) have been studied in recent years. While some DC-link capacitor considerations have been reported and ripple current assessments presented, the impact of these analyses on system design has not previously been quantified. These knowledge boundaries are expanded via this research. Meanwhile, a hypothesis is proposed that under the equitable operating conditions, the increase in the phase number decreases the DC-link capacitor requirements compared with the representative conventional three-phase VSIs. The analytical study shows the results corresponding to the hypothesis. Moreover, another hypothesis is made that other factors, e.g. switching strategies, carrier waveforms, and interleaving techniques also determine the DC-link capacitor requirements, and some strategies can further decrease the DC-link capacitor requirements. The presented analytical study supports this hypothesis. The study is partially validated via experiments on a brushless permanent magnet synchronous motor (PMSM) drive system designed for the equitable comparison of three-and nine-phase VSIs driving PMSMs. Finally, the DC-link capacitor design procedure is proposed for two level multi-phase VSIs.

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“…Those are focusing to the input [12]- [17], [18], [20] and output [18]- [21] ripple to meet the standard that have been determined [22]. On the input side of the inverter, the current ripple determines the size of the DC link capacitor of the inverter.…”

Section: Introductionmentioning

confidence: 99%

Current Ripple Analysis of New Double-Stator AC Drive Systems

2015

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IntroductionMany studies have been conducted to improve the performance of AC drive system. With advanced progress of the power semiconductor switches, inverters can widely applied as AC drive with high-frequency switching and various levels of power requirements [1]- [4]. Various kinds of AC drive system topology by using an inverter has been researched and developed for a wide variety of applications, such as locomotive traction, electric ship propulsion, more-electric aircraft, and high-power industrial applications. For higher power requirements, multiphase and multilevel inverter is the most commonly used. The multiphase inverter basically consists of conventional n-half bridge inverter connected in parallel corresponding to the load supplies. It provides lower pulsating torque, better tolerance and the possibility of splitting motor current across a higher number of phases, thus reducing the converter rating [3], [5]- [7]. For high voltage applications, multilevel inverter is more suitable because the inverter output voltage is obtained through a few steps of voltage levels, although it also has some drawbacks. Multilevel system requires a lot of switches and has capacitor voltage unbalanced problem [8]- [11].In order to develop better performance of the AC drive system as Figure 1 [22]. On the input side of the inverter, the current ripple determines the size of the DC link capacitor of the inverter. It has been reported that the DC link capacitor is the most vulnerable component in an inverter. Furthermore, on the output side of the inverter, the higher current ripple could cause the motor to heat faster.In this paper, a new topology of double-stator AC drive system is proposed to combine the benefits of both multiphase and multilevel system. In the proposed system, as shown in Figure 2, two conventional two-level three-phase inverters are connected in series on the DC sides. Each three-phase output of these two inverters is supplying three-phase stator winding set of double-stator AC motor. By using the proposed topology, the advantages of simple twolevel inverter topology and high reliability and power density of multiphase AC motors can be combined. Analytical expressions of input and output current ripples of the proposed system are then derived. It is shown that under the same DC input voltages, the output current ripple of the proposed system is lower than the conventional topology. Under the same output voltage, the proposed system has lower input current and therefore, fewer losses on the DC power supply

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Analysis and minimization of input current and voltage ripples of five-phase PWM inverters

Cited by 7 publications

References 7 publications

Influence of PWM techniques on the DC-Link capacitor power losses of multiphase VSIs

Influence of PWM techniques on the DC-Link capacitor power losses of multiphase VSIs

Multi‐phase VSI DC‐link capacitor considerations

Current Ripple Analysis of New Double-Stator AC Drive Systems

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