Novel Eliminated Common-Mode Voltage PWM Sequences and an Online Algorithm to Reduce Current Ripple for a Three-Level Inverter

Nguyen, Tam-Khanh Tu; Nguyen, Nho-Van; Prasad, Nadipuram R.

doi:10.1109/tpel.2016.2634009

Cited by 33 publications

(12 citation statements)

References 41 publications

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“…The four-leg inverter in [54] requires 8 power devices and an LC filter. Furthermore, the 3-level four-leg inverter in [57] requires 24 power devices and an LC filter, which makes its hardware cost far more than the traditional four-leg inverter [57] and 3-level inverters composed of 12 power switches and 6 diodes [59], [61], [63]. The paralleled inverters [65], [69] have the same amount of power switches as the 3-level inverters have, but the coupling inductors also contribute to the hardware cost of paralleled inverters.…”

Section: Comparison On Hardware Cost and Control Complexity Of Different Methodsmentioning

confidence: 99%

“…To reduce the switching loss, a three-segment switching sequences for zero CMV modulation is realized in [60]. To reduce the current ripple and THD, a four-state ZCMV PWM is presented in [61] with its four PWM sequences. According to synthesizing reference vectors with different space vectors, three types of ZCMV PWM for three-level inverters are listed and comparatively studied in [62].…”

Section: Complex Topologies Of Inverter and Machinesmentioning

confidence: 99%

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A Review on Conductive Common-Mode EMI Suppression Methods in Inverter Fed Motor Drives

Zhang

Chen

et al. 2021

IEEE Access

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The impact of electromagnetic interference (EMI) is an increasingly important aspect of the performance of switching inverters. The challenges of managing EMI continue to grow with the emergence of wide bandgap (WBG) devices, the trend towards ever-greater integration and higher power rating. This paper reviews suppression methods for the conductive common-mode (CM) EMI in inverter fed motor drives. In order to span EMI suppression across the full system design process, the review considers both mitigation from the sources and suppression along the conduction paths. Furthermore, the shortcomings and merits of the reviewed publications are discussed, and their attenuation frequency range and attenuation level are compared. It is demonstrated that the CM EMI at low frequency is mainly determined by the PWM strategies and can be reduced or even theoretically eliminated through zero common-mode control. On the other hand, the CM EMI at high frequency is markedly influenced by the switching transients of the power devices. Thus, various drive circuits are reviewed which improve the switching behavior. Finally, the deployment of passive and active filters to suppress or compensate for the EMI is discussed.INDEX TERMS Conductive EMI, EMI sources, inverter fed motor drives, propagation paths.

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Section: Comparison On Hardware Cost and Control Complexity Of Different Methodsmentioning

confidence: 99%

Section: Complex Topologies Of Inverter and Machinesmentioning

confidence: 99%

A Review on Conductive Common-Mode EMI Suppression Methods in Inverter Fed Motor Drives

Zhang

Chen

et al. 2021

IEEE Access

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“…To sum up, how to reduce the switching loss and amplitude of common mode voltage is a problem that must be considered in the high power motor system. At present, domestic and overseas scholars have carried out extensive and in-depth research on the problems of high switching loss [6][7][8][9][10] and high common mode voltage [11][12][13][14][15] of multilevel inverters, and have made a series of achievements. In terms of switching loss reduction, in Reference [6], a closed-loop control strategy based on carrier modulation is proposed, in which the clamping region is inserted in every half fundamental period to reduce switching loss.…”

Section: Introductionmentioning

confidence: 99%

“…Additionally, the design and selection rules of the optimal switch sequence are obtained through the analysis of the current ripple. Based on the analysis of Reference [13], Reference [14] proposes a double zero vector synthesis sequence method, which can reduce the output current ripple while ensuring the zero common mode voltage amplitude of the inverter. In Reference [15], a method of reducing switching loss by adjusting the position of the zero vector in the sampling period is proposed, and the basic vector synthesis switching sequence with small common mode voltage amplitude is selected.…”

Section: Introductionmentioning

confidence: 99%

“…However, the calculation process of this method is complex, and the strategy is essentially a continuous modulation strategy, the switching loss can be further reduced. However, it must be noted that References [12][13][14][15] all adopt the synthesis method of the non-nearest three vector, the ripple, and THD value of output waveform of the inverter will go up, especially in the low modulation index.…”

Section: Introductionmentioning

confidence: 99%

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Improved Synchronized Space Vector PWM Strategy for Three-Level Inverter at Low Modulation Index

et al. 2019

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Aimed at reducing the switching loss and common-mode voltage amplitude of high-power medium-voltage three-level inverter under low modulation index conditions, an improved synchronous space vector PWM strategy is proposed in this paper. The switching times in each fundamental period are reduced by the re-division of small regions and the full use of the redundant switching state. The sum of switching algebra is introduced as an evaluation index and the switching state with the minimum value of the sum of switching algebra are adopted. Then, the common mode voltage amplitude is reduced. The theoretical analysis and experimental results show that the improved modulation strategy proposed in this paper can effectively reduce the switching loss and common-mode voltage amplitude of the inverter under the condition of the low modulation index. Moreover, the neutral-point voltage ripple is also reduced simultaneously.

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Analysis and suppression of switching‐frequency harmonics in variable‐output‐voltage inverters

Farhadi‐Kangarlu,

Khiavi,

Neyshabouri

2023

Circuit Theory & Apps

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SummaryIn many practical applications such as motor drives, the inverter is required to produce a variable output voltage within a wide range (e.g., 0.1 to 1 pu). In such cases, when the inverter operates in low modulation index (low output voltage), the harmonic distortion of the output voltage increases due to considerable reduction in the magnitude of the fundamental component. Also, the ratio of the switching losses to the output power will be high in the low modulation index. In this paper, a simple solution is proposed to overcome the problems. The principle of the proposed solution is to adjust the DC‐link voltage so that the modulation index of the inverter remains within a specific high range. Different practical ways of obtaining controlled DC‐link voltage are presented. Also, for operation of the DC‐DC converter used for DC‐link voltage control, three strategies are proposed. The proposed solution is simple, and it is very effective and feasible to implement. To the best of the authors' knowledge, the idea has not been presented in this form previously. In order to verify the proposed solution, the simulation and experimental results are presented and discussed.

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Novel Eliminated Common-Mode Voltage PWM Sequences and an Online Algorithm to Reduce Current Ripple for a Three-Level Inverter

Cited by 33 publications

References 41 publications

A Review on Conductive Common-Mode EMI Suppression Methods in Inverter Fed Motor Drives

A Review on Conductive Common-Mode EMI Suppression Methods in Inverter Fed Motor Drives

Improved Synchronized Space Vector PWM Strategy for Three-Level Inverter at Low Modulation Index

Analysis and suppression of switching‐frequency harmonics in variable‐output‐voltage inverters

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