Introduction of the harmonic distortion determining factor and its application to evaluating real time PWM inverters

Fukuda, Satoru; Iwaji, Yoshitaka; Sang, S.-i.

doi:10.1109/ias.1993.299039

Cited by 14 publications

(16 citation statements)

References 4 publications

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“…9. These experimental results confirm that the total rms harmonic distortion in the line current can indeed be analyzed in terms of F DIST theoretically (despite the simplifying assumptions involved in the evaluation of F DIST [42]- [44]). At least, this is valid for the frequency range considered, namely, 10%-100% of the base frequency.…”

Section: Resultssupporting

confidence: 79%

“…As it is widely known, the line current ripple in a PWM inverter-fed motor drive is caused by the instantaneous error between the applied voltage and the reference voltage [33]- [35], [39]- [44]. Fig.…”

Section: Analysis Of Current Ripplementioning

confidence: 99%

“…The mean square value of the stator flux ripple over a subcycle corresponding to these four sequences F 2 SEQ (SEQ = 1012, 2721, 0121, and 7212) can be evaluated in a fashion similar to F 2 0127 . The rms value of stator flux ripple over a sector is normalized with respect to the fundamental flux ψ 1 to obtain the total rms harmonic distortion factor based on stator flux ripple (F DIST ) as defined in The total rms line current ripple can be calculated using the analytically evaluated F DIST , which is independent of machine parameters [35], [42]- [44]. Fig.…”

Section: Analysis Of Current Ripplementioning

confidence: 99%

“…In case of discontinuous PWM methods, only one zero state (− − − or + + +) is applied for the entire T Z in a subcycle or half-carrier cycle [40]- [44].…”

Section: Introductionmentioning

confidence: 99%

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Novel Switching Sequences for a Space-Vector-Modulated Three-Level Inverter

Das

Narayanan

2012

IEEE Trans. Ind. Electron.

129

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A three-level inverter produces six active vectors, each of normalized magnitudes 1, 0.866, and 0.5, besides a zero vector. The vectors of relative length 0.5 are termed pivot vectors. The three nearest voltage vectors are usually used to synthesize the reference vector. In most continuous pulsewidth-modulation (PWM) schemes, the switching sequence begins from a pivot vector and ends with the same pivot vector. Thus, the pivot vector is applied twice in a subcycle or half-carrier cycle. This paper proposes and investigates alternative switching sequences, which use the pivot vector only once but employ one of the other two vectors twice within the subcycle. The total harmonic distortion (THD) in the fundamental line current pertaining to these novel sequences is studied theoretically as well as experimentally over the whole range of modulation. Compared with centered space vector PWM, two of the proposed sequences lead to reduced THD at high modulation indices at a given average switching frequency.Index Terms-Harmonic analysis, harmonic distortion, multilevel inverter, neutral-point clamped (NPC) inverter, pulsewidth modulation, space vector, stator flux ripple, voltage source inverter.

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Section: Resultssupporting

confidence: 79%

Section: Analysis Of Current Ripplementioning

confidence: 99%

Section: Analysis Of Current Ripplementioning

confidence: 99%

“…In case of discontinuous PWM methods, only one zero state (− − − or + + +) is applied for the entire T Z in a subcycle or half-carrier cycle [40]- [44].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Novel Switching Sequences for a Space-Vector-Modulated Three-Level Inverter

Das

Narayanan

2012

IEEE Trans. Ind. Electron.

129

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“…6]. Fukuda et al [18], [19] introduces the similar kinds of harmonics distortion prediction. However, most of these harmonics distortion analysis are for the whole line cycle; thus, current-ripple distribution in the line cycle is not well predicted.…”

Section: Introductionmentioning

confidence: 99%

Current-Ripple Prediction for Three-Phase PWM Converters

Jiang¹,

Wang

2014

IEEE Trans. on Ind. Applicat.

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The three-phase pulsewidth-modulation (PWM) converter is one of the most widely used topologies for power conversion. In order to design PWM methods, the influence of PWM methods on the current ripple is needed. This paper studies the current ripple of a three-phase PWM converter with general PWM methods for the design and control of this kind of converter. The current ripple is analyzed with eight different Thevenin equivalent circuits for the eight different voltage vectors. Then, the current-ripple slope and effective time could be achieved for every period. The current ripple could be predicted with both peak and rms values. Analytical predicted results show that discontinuous PWM could generate obviously bigger current ripples than space vector PMW for both peak and rms values with the same conditions. Simulation and experiments are built to verify the analytical results, proving that the theoretical prediction is valid. This analysis provides the basis for the design and control of the PWM method for converters.

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Analysis of sine‐triangle and zero‐sequence injection modulation schemes for split‐phase induction motor drive

Rakesh¹,

Narayanan²

2016

IET Power Electronics

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A split-phase induction motor is fed from two three-phase voltage source inverters for speed control. This study analyses carrier-comparison based pulse width modulation (PWM) schemes for a split-phase motor drive, from a spacevector perspective. Sine-triangle PWM, one zero-sequence injection PWM where the same zero-sequence signal is used for both the inverters, and another zero-sequence injection PWM where different zero-sequence signals are employed for the two inverters are considered. The set of voltage vectors applied, the sequence in which the voltage vectors are applied, and the resulting current ripple vector are analysed for all the PWM methods. Besides all the PWM methods are compared in terms of dc bus utilisation. For the same three-phase sine reference, the PWM method with different zero-sequence signals for the two inverters is found to employ a set of vectors different from the other methods. Both analysis and experimental results show that this method results in lower total harmonic distortion and higher dc bus utilisation than the other two PWM methods.

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Introduction of the harmonic distortion determining factor and its application to evaluating real time PWM inverters

Cited by 14 publications

References 4 publications

Novel Switching Sequences for a Space-Vector-Modulated Three-Level Inverter

Novel Switching Sequences for a Space-Vector-Modulated Three-Level Inverter

Current-Ripple Prediction for Three-Phase PWM Converters

Analysis of sine‐triangle and zero‐sequence injection modulation schemes for split‐phase induction motor drive

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