scholarly journals Application of Improved Phase-Shifted Pulse Width Modulation with Third harmonic injection to Hybrid Modular Multi-level Converter

2018 ◽  
Author(s):  
Mohammad Mohsen Rahimian ◽  
Majid Hosseinpour ◽  
Malabika Basu ◽  
Michael Farrell ◽  
Shahab Sajedi
Keyword(s):  
Pulse Width ◽  
Pulse Width Modulation ◽  
Third Harmonic ◽  
Harmonic Injection ◽  
Multi Level ◽  
Level Converter

scholarly journals Research on the Equivalent Virtual Space Vector Modulation Output of Diode Clamped N-level Converter under Multi-Modulation Carrier Modulation

Energies ◽  
2020 ◽  
Vol 13 (15) ◽  
pp. 3803
Author(s):  
Yingjie He ◽  
Chao Lei ◽  
Yunfeng Liu ◽  
Jinjun Liu
Keyword(s):  
Theoretical Analysis ◽  
Pulse Width ◽  
Pulse Width Modulation ◽  
Virtual Space ◽  
Space Vector ◽  
N Level ◽  
Capacitor Voltage ◽  
Multi Level ◽  
Level Converter ◽  
Relationship Of

Diode-clamped multi-level converters have DC-side capacitors in series, which will lead to the unbalance of DC-side capacitor voltage, the distortion of the output waveform, the increase of total harmonic distortion (THD), and even the damage of switching devices, which will make the system inoperable. The proposal of virtual space vector pulse-width modulation (VSVPWM) realizes the balanced control of the capacitor voltage, but when the output level of converter increases, the implementation of VSVPWM becomes very complicated, and the amount of calculation also increases greatly, thus hindering its application in the multi-level circuit. Compared with VSVPWM, the carrier-based pulse-width modulation (CBPWM) is simple to operate and easy to implement. If the equivalent relationship between CBPWM and VSVPWM can be found, the application of VSVPWM can be generalized to any level, and the advantages of VSVPWM can be fully utilized. This paper aims to study the inner relationship of VSVPWM and the multi-modulation carrier CBPWM (MCBPWM). After strict theoretical analysis, the equivalent relationship of VSVPWM and MCBPWM in the three-level and four-level and converter is realized by injecting the zero-sequence component into the modulation waves. Furthermore, the equivalent relationship between VSVPWM and MCBPWM is deduced to the N-level converter. Finally, the correctness of the relevant theoretical analysis is verified by the experiment.

scholarly journals Assessment of Equal and Unequal Amplitude Carriers for a 1Φ Five Level Flying Capacitor Multilevel Inverter

2015 ◽  
Vol 15 (2) ◽  
pp. 229
Author(s):  
P. Sureshpandiarajan ◽  
S.P Natarajan ◽  
C.R. Balamurugan ◽  
K. Ramasamy
Keyword(s):  
Root Mean Square ◽  
Pulse Width ◽  
Single Phase ◽  
Pulse Width Modulation ◽  
Harmonic Distortion ◽  
Multilevel Inverter ◽  
Mean Square ◽  
Third Harmonic ◽  
Multi Level ◽  
Equal Amplitude

<p class="IEEEAuthorAffiliation">This work presents the comparison of various Pulse Width Modulation (PWM) techniques for the chosen single phase half bridge FCMLI (Flying Capacitor Multi Level Inverter). In this paper, a single phase half bridge flying capacitor multilevel inverter is controlled with sinusoidal, THI (Third Harmonic Injection), Trapezoidal and TAR (Trapezoidal Amalgamated Reference)reference with Equal Amplitude Carriers (EAC) and UEAC (Un Equal Amplitude Carriers). The proposed EAC and UEAC is applied for various PWM strategies. The PWM methods used for the analysis are PD (Phase Disposition) PWM, POD (Phase Opposition and Disposition) PWM, APOD (Alternative Phase Opposition and Disposition) PWM and CO (Carrier Overlapping) PWM with EAC and UEAC. For all the PWM methods and references the UEAC produces less THD and higher fundamental RMS (Root Mean Square) values except for m<sub>a</sub> =1. For m<sub>a</sub> =1 the EAC provides less THD (Total Harmonic Distortion) and higher fundamental RMS (Root Mean Square) values for all the PWM methods and references. To validate the developed technique, simulations are carried out through Power System Block Set.</p>

scholarly journals Third harmonic injection pulse-width modulation technique for a five-phase voltage source inverter

2020 ◽  
Vol 17 (3) ◽  
pp. 1607
Author(s):  
Yasir M.Y. Ameen ◽  
Bashar A. Fadheel ◽  
Ali J Mahdi
Keyword(s):  
Pulse Width ◽  
Pulse Width Modulation ◽  
Voltage Source ◽  
Power Electronic ◽  
Phase Voltage ◽  
Third Harmonic ◽  
Mode Operation ◽  
Harmonic Injection ◽  
Power Capability ◽  
Injection Pulse

<span>Nowadays application of advanced power electronic technology enables producing an AC supply with a phase number higher than three-phase. Five-phase voltage source inverters (5ph-VSI) have been used in advanced power electronic drives to improve the reliability of the drive system and to boost the power capability of the converter as well as to their other inherent merits. This paper shows the mathematical analysis and simulation of the third harmonic injection pulse width modulation (THI-PWM) 5ph-VSI connected with inductive load in three scenarios i.e. star, Pentagon and pentacle. The presented THI-PWM technique for 5ph-VSI aims to increase the inverter fundamental voltage and hence to maximize the utilization of the DC bus without causing over-modulation. The simulation results are compared with typical sinusoidal pulse width modulation (SPWM) and the 10-step mode operation. The proposed scheme may be considered as a compromise case between the two reference cases;  as low harmonic components compared with 10-step mode operation and a high utilization factor compared with SPWM.</span>

A Review on Modulation Strategies of Multi Level Inverter

2016 ◽  
Vol 3 (3) ◽  
pp. 681 ◽  
Author(s):  
Chinnapettai Ramalingam Balamurugan ◽  
S.P. Natarajan ◽  
R. Bensraj ◽  
B. Shanthi
Keyword(s):  
Form Factor ◽  
Pulse Width ◽  
Pulse Width Modulation ◽  
Crest Factor ◽  
Distortion Factor ◽  
Harmonic Injection ◽  
Multi Level ◽  
Switching Method

<p class="Abstract">This review develop different switching methods for Multi Level Inverter (MLI). The switching methods proposed in this paper are to compare various methods and to predict exact switching method for different application based upon its quality of the outputs.  The performance of the inverter is analyzed with the parameters like THD (Total Harmonic Injection), V<sub>RMS </sub>(fundamental), CF (Crest Factor), FF (Form Factor) and DF (Distortion Factor). From the various non PWM (Pulse Width Modulation) and PWM methods the analysis are method to identify the exact PWM strategies for specific applications. </p>

scholarly journals Performance Improvement of Sensorless Vector Controlled Induction Motor Drive for Medium Power Applications

2019 ◽  
Vol 9 (2) ◽  
pp. 2061-2068
Keyword(s):  
Induction Motor ◽  
Performance Improvement ◽  
Pulse Width ◽  
Pulse Width Modulation ◽  
Motor Drive ◽  
Induction Motor Drive ◽  
Space Vector ◽  
Torque Pulsations ◽  
Multi Level ◽  
Simulation Results

This paper deals with sensorless vector controlled induction motor in which torque pulsations are reduced with improved input of induction motor. In proposed technique two multi winding transformers are used for generation of 18 sinusoidal signals given to rectifier unit and the rectifier output given as input to 9 level multi level inverter. In this proposed technique gating signals to the inverter switches will be provided through space vector pulse width modulation which considers speed as reference. This configuration was simulated in MATLAB/Simulink.and the simulation results are presented here with improvement in reduction of THD.

scholarly journals Improved harmonic injection pulse-width modulation variable frequency triangular carrier scheme for multilevel inverters

2020 ◽  
Vol 13 (14) ◽  
pp. 3146-3154
Author(s):  
Mohammad Sadegh Orfi Yeganeh ◽  
Mohammad Sarvi ◽  
Frede Blaabjerg ◽  
Pooya Davari
Keyword(s):  
Pulse Width ◽  
Pulse Width Modulation ◽  
Variable Frequency ◽  
Multilevel Inverters ◽  
Harmonic Injection ◽  
Injection Pulse
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