A carrier-based approach for overmodulation of three-level neutral-point-clamped inverter with zero neutral-point current

Maheshwari, Ramkrishan; Munk‐Nielsen, Stig; Busquets‐Monge, Sergio

doi:10.1109/ecce.2012.6342598

Cited by 7 publications

(12 citation statements)

References 16 publications

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“…Due to this complexity in the OVM region synthesization and on-time calculations, many studies are not preferred to include OVM region operation. Very few implementations have performed in the OVM region operation [21][22][23][24][25][26][27][28][29][30][31]. These implementations are using complex mathematical functions to realize the OVM non-linear region and on-time calculations.…”

Section: Introductionmentioning

confidence: 99%

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A Simple Multilevel Space Vector Modulation Technique and MATLAB System Generator Built FPGA Implementation for Three-Level Neutral-Point Clamped Inverter

Madasamy¹,

Pongiannan

Ravichandran³

et al. 2019

Energies

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The pulse width modulation (PWM) is an important segment in power electronic inverters and multilevel inverters (MLIs) design. The space vector modulation (SVM) methods own distinct advantages over other PWM methods. However, MLI SVM has involved more mathematics in their executions. Hence, the digital signal processors (DSPs) or field programmable gate arrays (FPGAs) based digital implementations are highly preferred for MLI SVM realizations, which require exceptional properties. The conventional MLI SVMs use complex mathematical functions to solve their internal functions to identify the space vector diagram (SVD) sub-triangle and over modulation boundary switching on-times. Particularly these are the changes in the position of reference vector with respect to their sub-triangle positions involving higher mathematical functions. This paper proposes a simplified three-level MLI SVM that reduces the sub-triangle and over modulation switching on-time calculations with reduced mathematical functions. The proposed MLI SVM is derived based on two-level SVM without changing the reference vector position, unlike the traditional approaches. This helps in extending the SVM for any n-level inverter with additional LUTs. The detailed theoretical study, MATLAB-Simulink system generator simulations and Xilinx FPGA family SPARTAN-III-3A based experimental implementations are done with three-level neutral point MLI fed induction motor drive. The theoretical design, analysis, and experimentation results validate the advantages of the proposed PWM design and its implementation. In addition, the proposed implementation is executed from the MATLAB Xilinx system generator directly into target FPGA, which makes it faithful, efficient and minimizes the time spent.

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Section: Introductionmentioning

confidence: 99%

“…These methods are relatively complex to implement [24,25]. Most of the OVM region studies in MLI SVM have been done by charging the reference vector position [23,24,[26][27][28][29][30]. The on-time switching calculations of OVM using virtual vectors were recognized by using modifying hexagonal trajectory.…”

Section: Introductionmentioning

confidence: 99%

A Simple Multilevel Space Vector Modulation Technique and MATLAB System Generator Built FPGA Implementation for Three-Level Neutral-Point Clamped Inverter

Madasamy¹,

Pongiannan

Ravichandran³

et al. 2019

Energies

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“…Reference [5] proposes a two-mode overmodualtion which is used as the control principle between limit trajectories. A carrier-based implementation of a modulation strategy for the overmodualtion region is proposed in Reference [8]. Reference [9] proposes two novel single-mode feed-forward carrier less-based SVPWM overmodulation strategies.…”

Section: Introductionmentioning

confidence: 99%

“…operate at extended speed including the field-weakening region in vector control with higher torque and power characteristics.To take full advantage of the dc bus voltage, several over modulation techniques[2][3][4][5][6][7][8][9][10][11] are investigated and studied by many researchers. References [2-5] investigate overmodulation techniques for two-level inverter and references[6][7][8][9][10][11] study overmodulation schemes for multi-level inverter.…”

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confidence: 99%

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A novel SVPWM overmodulation technique for three-level NPC VSI

Piao

Hung

2015

2015 IEEE Transportation Electrification Conference and Expo (ITEC)

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This paper proposes a simple space vector pulse width modulation (SVPWM) scheme for operating a three-phase three-level neutral-point clamped (NPC) voltage source inverter (VSI) at higher modulation indexes, including overmodulation region. Generally, the overmodulation techniques for SVPWM inverter need to store lots of data in the controller beforehand, which produces a huge memory while the control resolution is not perfect. Based on the study of existing overmodulation techniques published in literatures, a novel two-mode strategy and single-mode feed-forward carrier-based simplified SVPWM over modulation algorithms are proposed which can manage smooth transition from the linear control range to six-step operation. The proposed overmodulation techniques make continuous control of the output voltage up to the maximum voltage with a smooth linear transition characteristics and minimum distortions. The strategy is simple and suitable for practical digital implemen tation. Simulation results demonstrate the effectiveness of the proposed SVPWM overmodulation algorithm.

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Over Modulation Strategy of Power Converters: A Review

Guo

Yang

2018

IEEE Access

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A carrier-based approach for overmodulation of three-level neutral-point-clamped inverter with zero neutral-point current

Cited by 7 publications

References 16 publications

A Simple Multilevel Space Vector Modulation Technique and MATLAB System Generator Built FPGA Implementation for Three-Level Neutral-Point Clamped Inverter

A Simple Multilevel Space Vector Modulation Technique and MATLAB System Generator Built FPGA Implementation for Three-Level Neutral-Point Clamped Inverter

A novel SVPWM overmodulation technique for three-level NPC VSI

Over Modulation Strategy of Power Converters: A Review

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