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A Carrier-Based Pulse Width Modulation Method for Indirect Matrix Converters
Dinh-Tuyen Nguyen,Hong-Hee Lee,Tae-Won Chun 전력전자학회 2012 JOURNAL OF POWER ELECTRONICS Vol.12 No.3
This paper proposes a carrier-based pulse width modulation (PWM) method to control an indirect matrix converter (IMC) by analyzing the relationship between the space vector PWM (SVPWM) and the carrier-based PWM. The complexity of the SVPWM method for an IMC can be reduced by using an equivalent carrier-based PWM method. The advantage of the proposed algorithm is its ability use only one symmetrical triangular carrier signal to generate the gate signals for all of the power switches in both the rectifier and inverter stages as compared to the conventional method where the carrier signal used in the rectifier stage is different from that of the inverter stage. In addition, by using a suitable offset voltage component in the modulation signals, the output voltage magnitude reaches 0.866 of the input voltage magnitude. Simulation and experimental results are provided in order to validate the proposed method.
SVPWM Strategies for Three-level T-type Neutral-point-clamped Indirect Matrix Converter
Nguyen Dinh Tuyen,Le Minh Phuong,이홍희 전력전자학회 2019 JOURNAL OF POWER ELECTRONICS Vol.19 No.4
In this paper, the three-level T-type neutral-point-clamped indirect matrix converter topology and the relative space vectormodulation methods are introduced to improve the voltage transfer ratio and output voltage performance. The presentedconverter topology is based on combinations of cascaded-rectifier and three-level T-type neutral-point-clamp inverter. It canovercome the limitation of voltage transfer ratio of the conventional matrix converter and the high voltage rating of powerswitches of conventional matrix converter. Two SVPWM strategies for proposed converter are described in this paper to achievethe advantages features such as: sinusoidal input/output currents and three-level output voltage waveforms. Results from Psim9.0 software simulation are provided to confirm the theoretical analysis. Hence, a laboratory prototype was implemented, and theexperimental results are shown to validate the simulation results and to verify the effectiveness of the proposed topology andmodulation strategies.
SVPWM Strategies for Three-level T-type Neutral-point-clamped Indirect Matrix Converter
Tuyen, Nguyen Dinh,Phuong, Le Minh,Lee, Hong-Hee The Korean Institute of Power Electronics 2019 JOURNAL OF POWER ELECTRONICS Vol.19 No.4
In this paper, the three-level T-type neutral-point-clamped indirect matrix converter topology and the relative space vector modulation methods are introduced to improve the voltage transfer ratio and output voltage performance. The presented converter topology is based on combinations of cascaded-rectifier and three-level T-type neutral-point-clamp inverter. It can overcome the limitation of voltage transfer ratio of the conventional matrix converter and the high voltage rating of power switches of conventional matrix converter. Two SVPWM strategies for proposed converter are described in this paper to achieve the advantages features such as: sinusoidal input/output currents and three-level output voltage waveforms. Results from Psim 9.0 software simulation are provided to confirm the theoretical analysis. Hence, a laboratory prototype was implemented, and the experimental results are shown to validate the simulation results and to verify the effectiveness of the proposed topology and modulation strategies.
A Carrier-Based Pulse Width Modulation Method for Indirect Matrix Converters
Nguyen, Dinh-Tuyen,Lee, Hong-Hee,Chun, Tae-Won The Korean Institute of Power Electronics 2012 JOURNAL OF POWER ELECTRONICS Vol.12 No.3
This paper proposes a carrier-based pulse width modulation (PWM) method to control an indirect matrix converter (IMC) by analyzing the relationship between the space vector PWM (SVPWM) and the carrier-based PWM. The complexity of the SVPWM method for an IMC can be reduced by using an equivalent carrier-based PWM method. The advantage of the proposed algorithm is its ability use only one symmetrical triangular carrier signal to generate the gate signals for all of the power switches in both the rectifier and inverter stages as compared to the conventional method where the carrier signal used in the rectifier stage is different from that of the inverter stage. In addition, by using a suitable offset voltage component in the modulation signals, the output voltage magnitude reaches 0.866 of the input voltage magnitude. Simulation and experimental results are provided in order to validate the proposed method.
Novel Single-state PWM technique in Multilevel Inverter for unbalanced dc sources
Nguyen Van Nho,Hong Hee Lee,Nguyen Dinh Tuyen 전력전자학회 2007 ICPE(ISPE)논문집 Vol.- No.-
Single-state PWM technique (SS PWM0 presents an optimised switching losses PWM scheme to be applied for multilevel inverter for possible reducing number of switchings in a sampling period. Nonlinear control characteristics and harmonic distortion factor can be significantly improved if the number of levels is high. To implement a single- state PWM control with minimised voltage error on condition of unbalance dc sources, a compensating technique is required. The paper will propose a possible solution for implementing the SS PWM with minimised voltage error, using carrier based approach. This again demonstrates the utilisation of carrier based and space vector PWM relationship in solving various optimised PWM problems in multilevel inverters.
Bui Van Tuyen,Du Dinh Nguyen,Abdelouahed Tounsi 국제구조공학회 2023 Steel and Composite Structures, An International J Vol.48 No.6
This paper uses a new type of deformation theory to establish the free vibration and static buckling equations of nanoplates resting on two-parameter elastic foundations, in which the flexoelectric effect is taken into account. The proposed approach used in this work is not only simpler than other higher-order shear deformation theories but also does not need any shear correction coefficients to describe exactly the mechanical responses of structures. The reliability of the theory is verified by comparing the numerical results of this work with those of analytical solutions. The results show that the flexoelectric effect significantly changes the natural frequency and the critical buckling load of the nanoplate compared with the case of neglecting this effect, especially when the plate thickness changes and with some different boundary conditions. These are new results that have not been mentioned in any publications but are meaningful in engineering practice.
Pham Ba Khien,Du Dinh Nguyen,Abdelouahed Tounsi,Bui Van Tuyen Techno-Press 2024 Advances in nano research Vol.16 No.1
This work is the first of its kind to integrate Mindlin's theory with analytical methods in order to produce an exact solution to a specific vibration issue as well as a bending problem involving a nanoplate that is supported by a viscoelastic foundation. The plate is exposed to the simultaneous effects of a compressive load in the plate plane and a force operating perpendicular to the plane of the nanoplate. In addition, the flexoelecity effect is included into the plate. The strain gradient component is taken into consideration while calculating the plate equilibrium equation using the nonlocal theory and Hamilton's principle. The free vibration and static responses of the nanoplate seem to be both real and imaginary components because of the appearance of the viscoelastic drag coefficient of the viscoelastic foundation. This study also shows that when analyzing the mechanical response for nanostructure, taking into account the flexoelectricity effect and the influence of the nonlocal parameter, the results will be completely different from the case in which this parameter is ignored. This indicates that it is vital to take into consideration the effects of nonlocal parameters on the nanosheet structure while also taking into consideration the effect of flexoelectricity.
Mai Ha Hoang,박지은,Dinh Long Phan,Trinh Tung Ngo,Tuyen Van Nguyen,박창근,조민주,최동훈 한국고분자학회 2018 Macromolecular Research Vol.26 No.9
Two new wide-bandgap conjugated copolymers, T-3MT and 2T-3MT, containing methyl-3-thiophenecarboxylate (3MT) as a weak accepting unit and indacenodithiophene (IDT) or indacenodithienothiophene (IDTT) as ladder-type donating units, were synthesized through Stille coupling polymerization. The effects of the IDT and IDTT units on the physical, optical, and electrochemical properties of these copolymers were investigated. Polymer solar cells (PSCs) were constructed using these new copolymers and different acceptor molecules for inter-comparative analysis of their performance. The PSCs bearing the as-cast active layers with 2,2'-((2Z,2'Z)-((4,4,9,9-tetrakis(4-hexylphenyl)-4,9-dihydro-s-indaceno[1,2-b:5,6-b'] dithiophene-2,7-diyl)bis(methanylylidene))bis(3-oxo-2,3-dihydro-1H-indene-2,1-diylidene))dimalononitrile (IM-IDT) displayed the highest PCEs of 3.78−3.96%, mainly owing to the predominant face-on orientation of blend #ilm, and the relatively high open circuit voltage exceeding 1.0 V.