Evaluation of DC-Link Voltage Switching Ripple in Multiphase PWM Voltage Source Inverters

Vujacic, Marija; Dordevic, Obrad; Grandi, Gabriele

doi:10.1109/tpel.2019.2936429

Cited by 33 publications

(20 citation statements)

References 28 publications

(33 reference statements)

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“…On the other side, considering the dc‐link voltage switching ripple (high‐frequency), it has been shown in Ref. [19] that its maximum value decreases when the number of phases increases up to n = 7 and then practically saturates for n > 7. In applications where both the switching frequency and the unbalance factor are small, both the switching and the low‐frequency dc‐link voltage ripple components should be calculated.…”

Section: Dc‐link Capacitor Designmentioning

confidence: 99%

DC‐link low‐frequency current and voltage ripple analysis in multiphase voltage source inverters with unbalanced load

Vujacic

Dordevic

Mandrioli

et al. 2021

IET Electric Power Appl

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Inverter's performance and operating mode may be negatively affected by inverter input (dc‐link) current and voltage ripple. It is a common experience that even theoretically balanced loads with perfectly balanced supply voltages, such as multiphase ac motors supplied by pulse‐width modulation (PWM) inverters, in practice show a certain degree of current unbalance, in the range of a few percent, which introduces a low‐frequency instantaneous power oscillation. This reflects in current and voltage low‐frequency ripple on the dc‐link inverter side (i.e. at the double‐fundamental frequency). A possible method to analyse this matter is through the symmetric sequence components. In particular, based on the first negative current sequence component and by considering the equivalent dc‐link impedance calculated at the dominant double‐fundamental frequency, the amplitude of the corresponding dc‐link voltage ripple component is calculated in this work for a general multiphase load. Finally, the design of the dc‐link capacitor in multiphase inverters is proposed considering requirements referred to the double‐fundamental dc voltage ripple. The feasibility of the proposed developments has been verified for three‐, five‐ and seven‐phase inverters by both numerical simulations and comprehensive experimental tests, always showing a good matching.

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Section: Dc‐link Capacitor Designmentioning

confidence: 99%

DC‐link low‐frequency current and voltage ripple analysis in multiphase voltage source inverters with unbalanced load

Vujacic

Dordevic

Mandrioli

et al. 2021

IET Electric Power Appl

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“…In fact, dual three-phase machines have different DC-link topologies. In general, DC-link topologies can be divided into three types: parallel-connected [14][15][16], seriesconnected [17][18], and separated DC-links [19][20][21][22], as illustrated in Fig. 1.…”

Section: Introductionmentioning

confidence: 99%

An Enhanced SVPWM Strategy Based on Vector Space Decomposition for Dual Three-Phase Machines Fed by Two DC-Source VSIs

Liao

Lyu

Huang

et al. 2021

IEEE Trans. Power Electron.

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“…For the inverter, high phase numbers allow a better use of the DC-Bus voltage by injection of different harmonics [11], a reduction of the DC-link capacitor size [12] and of the inverter losses [13].…”

Section: Introductionmentioning

confidence: 99%

Torque-Speed Characteristic Improvement in Nineteen-phase Induction Machine with Special Phase Connection

Mekahlia

Semail

Scuiller

et al. 2020

2020 International Conference on Electrical Machines (ICEM)

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Multiphase induction machines are advantageous regarding speed range extension in comparison with three-phase induction machines. This paper investigates how to choose the connection between stator phases for a multiphase induction machine allowing to extend the Torque-Speed characteristic of the machine, for traction application. A nineteen-phase induction machine with special phase connection is proposed. This topology is compared to a three-phase machine, with the same global volume, using a Finite-Element approach. The results show a significant extension of the Torque-Speed characteristic horizontally, by speed range extension, and vertically, by maximum torque enhancement, thanks to the pole-changing operation with the chosen phase connection.

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Evaluation of DC-Link Voltage Switching Ripple in Multiphase PWM Voltage Source Inverters

Abstract: The version presented here may differ from the published version or from the version of the record. Please see the repository URL above for details on accessing the published version and note that access may require a subscription.

Cited by 33 publications

References 28 publications

DC‐link low‐frequency current and voltage ripple analysis in multiphase voltage source inverters with unbalanced load

DC‐link low‐frequency current and voltage ripple analysis in multiphase voltage source inverters with unbalanced load

An Enhanced SVPWM Strategy Based on Vector Space Decomposition for Dual Three-Phase Machines Fed by Two DC-Source VSIs

Torque-Speed Characteristic Improvement in Nineteen-phase Induction Machine with Special Phase Connection

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