Investigation of the Common Mode Voltage for a Neutral-Point-Clamped Multilevel Inverter Drive and its Innovative Elimination through SVPWM Switching-State Redundancy

Bharatiraja, C.; Munda, Josiah L.; Sriramsai, N.; Navaneesh, T Sai

doi:10.11591/ijpeds.v7.i3.pp892-900

Cited by 8 publications

(11 citation statements)

References 17 publications

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“…The main difference among traditional and random PWM (RPWM) is pulse signal width is no longer constrained to the operating frequency. The modulated signal and the switching frequency (carrier frequency) regulate relay [7]. The structure of three phase induction motor is shown in Figure 1 (see Appendix).…”

Section: Start Of the Art Of Rpwmmentioning

confidence: 99%

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Development of performance characterization in VSI-fed induction motor drives using random PWM

Raman

Easwaran²,

Srinivasan

et al. 2022

IJPEDS

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Any industrial or power sector application requires a pulse width modulation (PWM) inverter. Industrial drives, in particular, are highly concerned with industrial standards. To satisfy the voltage source inverter (VSI) drives objects, a variety of PWM approaches are used, including inverter DC input voltage utilizations, suppression of higher and lower order of harmonics, as well as spreading harmonics acoustic noise reduction, among others PWMs. One of the better approaches for minimizing noise on voltage source three-phase inverter fed drives is random pulse width modulation (RPWM). Despite the fact that these described RPWM approaches are superior in terms of harmonic spreading and mitigation, these methods are unable to achieve the target DC-link utilizations. As a result, the focus of this paper is on combining multicarrier RPWM principles with space vector PWM (SVPWM) to produce multi-carrier random SVPWM (MCRSVPWM). The suggested PWM generates random unsystematic triangle carrier (5 kHz, 2.5 kHz, 1.25 kHz, 1 kHz) based pulses, whereas the traditional random PWM techniques are uses a fixed frequency triangular carrier to generate random pulse positions. Asynchronous induction motor driving simulation is carried out using MATLAB/Simulink. The proposed MCRSVPWM is put to the test with a 2-kW six-switch VSI-fed induction motor drive system.

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Section: Start Of the Art Of Rpwmmentioning

confidence: 99%

“…pulse [5]. In various attempts to minimise AC drives, PWM and external noise reduction filters have been suggested [7]- [12]. The RPWM is accomplished by altering the carrier wave's slope at random.…”

Section: Introductionmentioning

confidence: 99%

Development of performance characterization in VSI-fed induction motor drives using random PWM

Raman

Easwaran²,

Srinivasan

et al. 2022

IJPEDS

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“…Many researches have been made for the reduction of CMV in NPC MLI inverter as discussed in [95]- [98]. The power loss and switching loss analysis of MLI is done in [99]- [103].…”

Section: Redundant Vectors Are Removedmentioning

confidence: 99%

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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“…It directly uses the control variable given by the control system and identifies each switching vector as a point in complex space. It is useful in improving DC link voltage utilization, reducing commutation losses and Total Harmonic Distortion (THD) [10][11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

“…The reference samples which are closer to the medium and large vectors are moved towards their respective nearest medium and nearest large vectors. This vector selection is based up on the angle correction factor [15]. In Seo et.…”

Section: Introductionmentioning

confidence: 99%

A simple switching on-time calculation revision in multilevel inverter-space vector modulation to achieving extended voltage boundary operation

Bharatiraja

Pongiannan

Yusuff

et al. 2019

IJPEDS

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In inverters’ pulse width modulation techniques (PWM) the Space Vector PWM (SVPWM) is a smart contestant due to its direct control in nature with variables which provide the straight forward finds to each inverter switching vector. The industrial drives are acquainting to use SVPWM owing extended speed –torque region operations. However, the extended SVPWM operation is uses much mathematical calculation to predict the switching on-times, which demands high digital platform. In order to reduce this calculation in this paper a simple on-time calculation based SVPWM is proposed. The proposed SVPWM is developed for three-level multilevel inverter and the space perspective of vector analysis are established and explained. The over modulation enhances the proper power utilization capacity of voltage source inverter thereby improve the inverter output voltage and load. This proposed method tailed the similar mathematical practice as conventional two-level SVPWM for calculating sector identification and triangle determination. The approach finds the circular and hexagonal boundary on-time based on the straightforward reference vector position identification and calculates directly the switching pulse patterns for the inverter devices using an expression based on the definition of the duty cycle. The performance of the proposed SVM is simulated by MATLAB 11.b simulation software and validated with laboratory setup 2 kW, 12 switch neutral point clamped (NPC)-MLI fed 1.5 HP squirrel cage 3-phase induction motor open loop v/f control drive. The simulation and experimental results are closure and confirming the advantages of the proposed SVM method. The proposed scheme can be extended to n-level inverter and also applicable to cascaded H-bridge topology.

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Investigation of the Common Mode Voltage for a Neutral-Point-Clamped Multilevel Inverter Drive and its Innovative Elimination through SVPWM Switching-State Redundancy

Cited by 8 publications

References 17 publications

Development of performance characterization in VSI-fed induction motor drives using random PWM

Development of performance characterization in VSI-fed induction motor drives using random PWM

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

A simple switching on-time calculation revision in multilevel inverter-space vector modulation to achieving extended voltage boundary operation

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