Common-mode components comparison for different SVM schemes in three-phase four-legged converter

Liu, C.; Lai, Jih-Sheng; Lee, F.C.; Chen, D.; Zhang, R.

doi:10.1109/ipemc.2000.884567

Cited by 12 publications

(8 citation statements)

References 3 publications

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“…Research Article aspects such as total harmonic distortion (THD), switching loss and common-mode issues [6,18,19]. However, the proposed approach in [17] has only been developed for Class IIfalling-edge aligned scheme.…”

Section: Iet Power Electronicsmentioning

confidence: 99%

Modulation technique for Four‐Leg Voltage Source Inverter without a Look‐Up Table

Ebrahimzadeh

Farhangi

Iman‐Eini

et al. 2016

IET Power Electronics

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Three-dimensional space-vector modulation (3D SVM) has more popularity among the other modulation techniques of the four-leg inverter due to higher DC-link voltage utilisation. Sequencing schemes of the switching vectors in the 3D SVM are divided into Class I and II categories. Each of these classes itself has four kinds: (a) risingedge aligned, (b) falling-edge aligned, (c) symmetrically aligned and (d) alternative sequence. In this study, implementation of the conventional 3D SVM technique in abc-coordinate for four-leg voltage source inverters is simplified, while it can be so easily adopted in all kinds of sequencing schemes. Unlike conventional techniques, the proposed technique needs no switching vector determination and duty ratio calculation as well as reduces the computational burden. In this technique, turn-on interval of the upper switches, in every switching period, is calculated without need of a look-up table and complex equations. Applying the dead time by software is very straightforward in the proposed technique. In addition, by simplification of the proposed modulation technique, it can be applied to the three-leg inverters. Simulation results in PSCAD/EMTDC environment confirm the validity and effectiveness of the proposed technique. Experimental results are also provided to confirm the validity of the new approach.

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Section: Iet Power Electronicsmentioning

confidence: 99%

Modulation technique for Four‐Leg Voltage Source Inverter without a Look‐Up Table

Ebrahimzadeh

Farhangi

Iman‐Eini

et al. 2016

IET Power Electronics

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“…Proposals have been made to reduce the common mode voltage problem of the 4-leg inverter. For instance, use of the zero vectors can be avoided [15,16] but this also reduces the DC-link utilisation.…”

Section: Comparison Of 4-wire Inverter Topologiesmentioning

confidence: 99%

“…The THD of the output voltage is 1.35%. 15 An important reason to adopt the split-link 4-wire topology is to improve EMC through reduction of high frequency voltage variation of the inverter busbars with respect to ground. This was tested in simulation and is shown in Fig.…”

Section: Evaluation and Analysismentioning

confidence: 99%

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Increasing Voltage Utilization in Split-Link, Four-Wire Inverters

Liang

Green

Feng³

et al. 2009

IEEE Trans. Power Electron.

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“…The four-leg inverter can be controlled by three-dimensional space vector modulation (3DSVPWM) [7], which has the advantage of 15% higher utilization of the DC-bus voltage comparing to the split-link topology. The main drawback of this topology is the electromagnetic interference (EMI) problems caused by the high-frequency operation of the neutral leg [8]. Also, the control of the neutral leg is coupled with the control of the three-phase inverter.…”

Section: Introductionmentioning

confidence: 99%

A Four-leg Buck Inverter for Three-phase Four-wire Systems with the Function of Reducing DC-bus Ripples

Yang

Ming

Liang

et al. 2019

IECON 2019 - 45th Annual Conference of the IEEE Industrial Electronics Society

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Three-phase four-wire inverters are usually used to feed unbalanced three-phase loads with neutral currents. The unbalanced three-phase loads also bring to second-order ripples in the DC bus, which should be mitigated by bulky DC-bus capacitors to improve the system performance. In this case, the DC capacitance is designed for the second-order ripple frequency instead of the switching frequency, so it can not be reduced even when SiC MOSFETs are adopted to achieve high switching frequency. Although various topologies of three-phase four-wire inverters has been proposed to provide the path for neutral currents, they cannot handle the second-order ripples. Also, some active power decoupling solutions can be adopted, but they require additional active swithes and components, which increases the cost of the system. In this paper, a four-leg buck inverter is proposed, which consists of four DC-DC buck converters. Each buck converter is independently controlled. This topology can not only provide neutral currents, but also reduce the second-order ripples in the DC bus with active power decoupling control. The proposed topology doesn't require any additional active switches comparing to the conventional topologies with neutral legs. The effectiveness of proposed topology is verified by the simulation in MATLAB/Simulink.

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Common-mode components comparison for different SVM schemes in three-phase four-legged converter

Cited by 12 publications

References 3 publications

Modulation technique for Four‐Leg Voltage Source Inverter without a Look‐Up Table

Modulation technique for Four‐Leg Voltage Source Inverter without a Look‐Up Table

Increasing Voltage Utilization in Split-Link, Four-Wire Inverters

A Four-leg Buck Inverter for Three-phase Four-wire Systems with the Function of Reducing DC-bus Ripples

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