A novel SVPWM overmodulation technique for three-level NPC VSI

Piao, Chengzhu; Hung, John Y.

doi:10.1109/itec.2015.7165744

Cited by 8 publications

(5 citation statements)

References 7 publications

(11 reference statements)

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“…Generally, the OVM scheme is essential in electrical drive applications, if the drive is required to operate at extended speed including the field-weakening region and with higher torque and power characteristics [234], [235]. Hence the researchers tread in this field to give the significant performance of the MLI in OVM [158], [159].However, the mathematical complexity for achieving OVM is difficult. The CMV elimination in OVM is performed in [160] - [162].…”

Section: B Over Modulation Regionmentioning

confidence: 99%

“…But, when the modulation index greater than 0.907, both circular and hexagonal trajectory path is considered. This region is called as over modulation region [158], [159]. In OVM region, the Partial Elimination and Full Elimination of CMV can be done as studied in [160], [161].…”

Section: Open End Winding Five Phase Inverter: Figure 64 Five Phase Open End Winding Topologymentioning

confidence: 99%

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A Comprehensive Review on Space Vector Modulation Techniques for Neutral Point Clamped Multi-Level Inverters

2021

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The Neutral Point Clamped (NPC) Multi-Level Inverters (MLI) have been ruling the power electronics industries for the past two decades. The Multi-Carrier Pulse Width Modulation (MCPWM) is common PWM techniques which are widely used in NPC-MLI applications. However, MCPWM is not having a good impact on the balancing of DC-link voltages, Common Mode Voltage (CMV) and limiting the Total Harmonics Distortion (THD). The Selective Harmonic Elimination (SHE) technique is introduced for reducing the THD, however all the switching angles should be maintained less than π/2 to keep the eliminated harmonics at constant level which narrows down the modulation index range. Hence, in recent days Space Vector Modulation (SVM) technique is widely used in NPC-MLI, which gives better DC-link voltage balancing, self-neutral point balancing, near-zero CMV reduction, better-quality harmonics profile and switching loss minimization. Hence, it is a preferred solution for the majority of electrical conversion applications such as electric traction, high power industrial drives, renewable power generation, and gridconnected inverters, etc. The paper gives a comprehensive review of the SVM for NPC-MLI. First, this paper deliberates the state of art for two-level SVM and extends it to three-level (3L) SVM. Also compares the 3L SVM performance with other MCPWM techniques. Followed by the various modified MLI SVM techniques in terms of their implementations, DC-link capacitor balancing, and reduction of CMV. Further, the review of MLI SVM is widened to open-end winding Inverters and multiphase MLIs. The final part of this paper discussed the future trends and research directions on MLI SVM techniques and its applications.

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Section: B Over Modulation Regionmentioning

confidence: 99%

Section: Open End Winding Five Phase Inverter: Figure 64 Five Phase Open End Winding Topologymentioning

confidence: 99%

A Comprehensive Review on Space Vector Modulation Techniques for Neutral Point Clamped Multi-Level Inverters

2021

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“…In [15], three-level voltage source inverters (VSI) were investigated and were simulated implementing both single mode and dual mode overmodulation strategies [15].…”

Section: Introductionmentioning

confidence: 99%

Extended Overmodulation Operation of Space Vector PWM for Traction Motor Control at Low Switching Frequency

Altintas

Kocabaş

2022

IEEE Access

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There are several benefits of fully utilization of DC link voltage in railway traction applications in terms of increasing inverter output voltage, satisfying power-torque demand and component sizing. To meet traction system requirements; mostly space vector pulse width modulation (SVPWM) is preferred since it has lower harmonic contents and larger voltage reservoir than the others such as sinusoidal PWM (SPWM). Despite extended linear range of SVPWM, it may not be sufficient for traction systems due to high power requirements and low ratio of switching frequency to inverter output frequency. To overcome this problem, an algorithm having functional in the overmodulation range of SVPWM up to square wave modulation and applicable at low sampling, switching frequencies is proposed. Proposed method has ability of soft transition to overmodulation area and covers continuously all the section. Also, calculation of modulation signals is independent from sampling period. The detailed design method is given to calculate modulation signals to be compared with carrier wave in two different overmodulation sections and implemented. Implementations are used in practical experiments to verify the effectivity of proposed method. Moreover, practical experiments to ensure stability of the method are conducted with high powered traction motor in low switching frequency.

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“…In addition to circuit solutions related to the implementation of a high number of output voltage levels of inverters [25,26], there are algorithmic methods to improve the sinusoidality of the output voltage. One such method is the implementation of the overmodulation [27] and waveform optimum [28] mode.…”

Section: Introductionmentioning

confidence: 99%

A method for calculating the parameters of the sine filter of the frequency converter, taking into account the criterion of starting current limitation and pulse-width modulation frequency

Nerubatskyi

Plakhtii

Hordiienko

et al. 2021

EEJET

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An analysis of the method for ensuring the sinusoidality of the output voltage in power generation systems with self-commutated voltage inverters under the requirements of the international standard IEEE-519 is presented. In a number of programs, especially low-power generation systems, a low-cost solution is needed to provide the sinusoidal waveform of the output voltage with the total harmonic distortion of 5 %. This solution is to use two-level voltage inverters with an output sine LC filter. However, the feature of the sine filter with the frequency converter is that the PWM frequency affects the spectrum of higher harmonics of the output voltage. In addition, there is the starting current of the filter capacitor, which can disable the power switches of the voltage inverter. The developed method for calculating the values of the LC filter with the two-level voltage inverter in the PWM mode is presented meeting the requirements of the international standard IEEE-519, taking into account the modulation frequency and limitation of the starting current of the filter capacitor. To confirm the required quality of the output voltage of the two-level voltage inverter with the sine filter, an appropriate simulation model was created in the Matlab/Simulink computer simulation environment. The oscillograms and harmonic analysis of the input and output voltages of the sine filter, which showed the total harmonic distortion of 1.88 %, are presented. A physical prototype of the investigated system was created on the basis of a 5.5 kW OVEN PChV203-5K5-V frequency converter (Ukraine). Using the SIGLENT SDS1104X-E oscilloscope (China), the real waveform and the results of the harmonic analysis of the sine filter output voltage, confirming the implementation of the necessary sinusoidality criteria, were obtained

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A novel SVPWM overmodulation technique for three-level NPC VSI

Cited by 8 publications

References 7 publications

A Comprehensive Review on Space Vector Modulation Techniques for Neutral Point Clamped Multi-Level Inverters

A Comprehensive Review on Space Vector Modulation Techniques for Neutral Point Clamped Multi-Level Inverters

Extended Overmodulation Operation of Space Vector PWM for Traction Motor Control at Low Switching Frequency

A method for calculating the parameters of the sine filter of the frequency converter, taking into account the criterion of starting current limitation and pulse-width modulation frequency

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