Space vector analysis of dead-time voltage distortion in multiphase inverters

Grandi, Gabriele; Loncarski, Jelena

doi:10.1109/epepemc.2012.6397342

Cited by 3 publications

(3 citation statements)

References 15 publications

(25 reference statements)

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“…A small reduction in the second order harmonic component can also be justified by a small reduction in the output voltage/current introduced by the dead‐time, as reported in Refs. [30, 31].…”

Section: Resultsmentioning

confidence: 99%

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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: Resultsmentioning

confidence: 99%

“…In fact, apart from small numerical noises, only a 14th order component is noticeable. Again, the small reduction in the second order harmonic component can also be justified by the small reduction in the output voltage/current introduced by the dead‐time, according to Refs [30, 31].…”

Section: Resultsmentioning

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

View full text Add to dashboard Cite

show abstract

“…The further analysis has been carried out in the case of the three-phase inverter with balanced RL load, but it can readily be extended also to multiphase inverters, as done in the case of dead-time effects for pure sinusoidal currents [7,8]. If the output current is with ripple, the effect of dead-time is reduced, since during the zero-crossings the average of sign function of current is zero, so there is no effect on specific pulses of pole voltage at zero-crossings.…”

mentioning

confidence: 99%