scholarly journals Output Voltage Synthesis of a Modular Battery System based on a Cascaded H-Bridge Multilevel Inverter Topology for Vehicle Propulsion: Multilevel Pulse Width Modulation vs. Fundamental Selective Harmonic Elimination

2020 ◽  
Author(s):  
Anton Kersten ◽  
Lukas Baum ◽  
Weiji Han ◽  
Torbjorn Thiringer ◽  
Massimo Bongiorno
Keyword(s):  
Pulse Width ◽  
Output Voltage ◽  
Pulse Width Modulation ◽  
Multilevel Inverter ◽  
Battery System ◽  
Vehicle Propulsion ◽  
Harmonic Elimination ◽  
Selective Harmonic Elimination ◽  
Inverter Topology

scholarly journals Hybrid Output Voltage Modulation (PWM-FSHE) for a Modular Battery System Based on a Cascaded H-Bridge Inverter for Electric Vehicles Reducing Drivetrain Losses and Current Ripple

Energies ◽  
2021 ◽  
Vol 14 (5) ◽  
pp. 1424
Author(s):  
Anton Kersten ◽  
Manuel Kuder ◽  
Torbjörn Thiringer
Keyword(s):  
Output Voltage ◽  
High Speed ◽  
Pulse Width Modulation ◽  
Inductive Load ◽  
Battery System ◽  
Vehicle Propulsion ◽  
Harmonic Elimination ◽  
Selective Harmonic Elimination ◽  
Preliminary Study ◽  
Cycle Efficiency

This paper shows a preliminary study about the output voltage modulation of a modular battery system based on a seven-level cascaded H-bridge inverter used for vehicle propulsion. Two generally known modulation techniques, pulse width modulation (PWM) and fundamental selective harmonic elimination (FSHE), are extensively compared for such an innovative modular battery system inverter considering EVs’ broad torque-speed range. The inverter and the battery losses, as well as the inverter-induced current THD, are modeled and quantified using simulations. At low speeds, if the modulation index M is below 0.3, FSHE induces a high current THD (>>5%) and, thus, cannot be used. At medium speeds, FSHE reduces the drivetrain losses (including the battery losses), while operating at higher speeds, it even reduces the current THD. Thus, an individual boundary between multilevel PWM and FSHE can be determined using weightings for efficiency and current quality. Based on this, a simple hybrid modulation technique is suggested for modular battery system inverters, improving the simulated drive cycle efficiency by a maximum of 0.29% to 0.42% for a modeled small passenger vehicle. Furthermore, FSHE’s high speed dominance is demonstrated using a simple experimental setup with an inductive load.

Selective harmonic elimination pulse width modulation for three-phase cascaded multilevel inverter

2021 ◽  
Author(s):  
Baharuddin Ismail ◽  
Muzamir Isa ◽  
M. Z. Aikhsan ◽  
M. N. K. H. Rohani ◽  
C. L. Wooi ◽  
...  
Keyword(s):  
Pulse Width ◽  
Pulse Width Modulation ◽  
Multilevel Inverter ◽  
Harmonic Elimination ◽  
Three Phase ◽  
Selective Harmonic Elimination ◽  
Cascaded Multilevel Inverter

New Selective Harmonic Elimination-Pulse-Width Modulation for Cascaded H-bridge Multilevel Inverters

2018 ◽  
Vol 19 (5) ◽  
Author(s):  
Piyush L. Kamani ◽  
Mahmadasraf A. Mulla
Keyword(s):  
Real Time ◽  
Pulse Width ◽  
Output Voltage ◽  
Pulse Width Modulation ◽  
Experimental Studies ◽  
Equal Area ◽  
Multilevel Inverters ◽  
Harmonic Elimination ◽  
Selective Harmonic Elimination ◽  
Selection Of

AbstractThis paper presents a univariate equation-based selective harmonic elimination-pulse-width modulation (USHE-PWM) method for cascaded H-bridge (CHB) multilevel inverters (MLIs). Using equal-area criteria, the selection of voltage rating of dc-links have been done. The output voltage is controlled by inserting switching notch at the centre of each level of output voltage. Instead of conventional transcendental SHE-PWM equations, all these calculations are accomplished using univariate equations. This simplifies the real-time implementation of the proposed method greatly, even for the MLI with a large number of levels. The USHE-PWM method can eliminate more harmonics compared with the conventional SHE-PWM methods. While controlling the output voltage, the harmonic pattern remains unaffected. The validity of the proposed method is confirmed by the simulation and experimental studies.

scholarly journals A modified cascaded h-bridge multilevel inverter based on particle swarm optimisation (PSO) technique

2019 ◽  
Vol 16 (1) ◽  
pp. 41
Author(s):  
Mohammed Rasheed ◽  
Rosli Omar ◽  
Marizan Sulaiman ◽  
Wahidah Abd Halim
Keyword(s):  
Output Voltage ◽  
Single Phase ◽  
Pulse Width Modulation ◽  
Linear Equations ◽  
Harmonic Distortion ◽  
Particle Swarm ◽  
Multilevel Inverter ◽  
Harmonic Elimination ◽  
Selective Harmonic Elimination ◽  
Non Linear Equations

<span>In this paper, modified multilevel inverter, via addition of an auxiliary bidirectional switch, based on Newton Raphson (NR) and Particle Swarm Optimization (PSO) techniques is presented. The NR and PSO techniques were employed for selective harmonics elimination (SHE) solution in a modified Cascaded H Bridge Multilevel inverter (CHB-MLI). The Selective Harmonic Elimination Pulse-Width Modulation (SHE-PWM) is a powerful technique for harmonic minimization in multilevel inverter. The NR and PSO techniques were used to determine the switching angles by solving the non-linear equations of the output voltage waveform of the modified CHB-MLI in order to control the fundamental component and eliminate some low order harmonics. The proposed NR and PSO techniques are capable to minimize the Total Harmonic Distortion (THD) of the output voltage of the modified inverter within allowable limits. This paper aims to modeling and simulation by MATLAB of the modified topology of the CHB-MLI for a single-phase prototype for 13-levels. The inverter offers less THD and greater efficiency using PSO control algorithm compared with the NR algorithm. <br https://server9.kproxy.com/servlet/redirect.srv/sruj/snbzofspy/skvyzff/p1/> The performance of the proposed controllers based on NR and PSO techniques is verified through simulation.</span>

Optimization-based open-loop selective harmonic elimination pulse width modulation for multilevel inverter flying capacitor voltage balance considering load power factor variation

2020 ◽  
pp. 095965182093934
Author(s):  
Faouzi Armi ◽  
Lazhar Manai ◽  
Mongi Besbes
Keyword(s):  
Power Factor ◽  
Control Strategy ◽  
Pulse Width ◽  
Pulse Width Modulation ◽  
Open Loop ◽  
Multilevel Inverter ◽  
Load Power ◽  
Harmonic Elimination ◽  
Selective Harmonic Elimination ◽  
Capacitor Voltage

In this article, Newton–Raphson optimization-based selective harmonic elimination pulse width modulation is investigated for open-loop control of flying capacitor multilevel inverter. Proposed control strategy has allowed giving up current and voltage measurement instrumentations and sensors used in case of closed loop–based control. Proposed control strategy generates accurate switching angles, capable to balance flying capacitor voltage and eliminate lower order harmonics considering load power factor variation. Algorithm performances are verified by simulation and experiments, and obtained results prove that proposed technique does effectively eliminate specific harmonics and balance capacitor voltages while getting inverter output voltage with desired number of levels.

Design and Implementation of GA Based Selective Harmonic Elimination in Modified Cascaded Multilevel Inverter

2014 ◽  
Vol 573 ◽  
pp. 3-6
Author(s):  
S. Dhayanandh ◽  
S. Manoharan
Keyword(s):  
Pulse Width ◽  
Pulse Width Modulation ◽  
Harmonic Spectrum ◽  
Multilevel Inverter ◽  
Harmonic Elimination ◽  
Selective Harmonic Elimination ◽  
Seventh Order ◽  
High Control ◽  
Power Application ◽  
Cascaded Multilevel Inverter

- The emergence of multilevel inverters has been in increase since the last decade. These new types of converters are suitable for high voltage and high power application due to their ability to synthesize waveforms with better harmonic spectrum. Numerous topologies have been introduced and widely studied for utility and induction billet applications. In this paper, proposed a Modified Multilevel Inverter (MMI) is eleven Levels. This proposed MMI consists of less number of switches to attain eleven levels when compared to the traditional cascaded multilevel inverter to attain the same level. As a result, voltage current stress across switches gets reduced, so that power loss gets reduced in the system. Secondly, an effective pulse width modulation (PWM) approach that can be utilized successfully with high control accuracy is combination of selective harmonic elimination and pulse width modulation (SHEPWM).This technique offers many advantages other PWM techniques including direct control over output waveform harmonics, and the ability to eliminate third, fifth and seventh order harmonics.

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