Simplified carrier based space vector for n-level converter

2016 ◽  
Author(s):  
Suvajit Mukherjee ◽  
Peng Wang ◽  
Michael Adam Zagrodnik
Keyword(s):  
Space Vector ◽  
N 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 A Generic Multi-Level SVM Scheme Based on Two-Level SVM for n-Level Converters

Energies ◽  
2020 ◽  
Vol 13 (9) ◽  
pp. 2143
Author(s):  
Chen Wei ◽  
Xibo Yuan ◽  
Yonglei Zhang ◽  
Xiaojie Wu
Keyword(s):  
Pulse Width Modulation ◽  
Industrial Applications ◽  
Space Vector Modulation ◽  
Computation Complexity ◽  
Space Vector ◽  
N Level ◽  
Voltage Vector ◽  
Multi Level ◽  
Vector Modulation ◽  
Level Converter

Multi-level converters are widely used in various industrial applications. Among various space vector modulation (SVM) schemes, the multi-level SVM scheme based on two-level space vector pulse width modulation (SVPWM) is recognised as a simplified multi-level SVM scheme, which can reduce the computation complexity. However, this scheme is still complicated when the number of the voltage levels is large. This paper proposes a modified SVM scheme that can further simplify the multi-level SVM scheme based on two-level SVPWM. The proposed SVM scheme can directly determine the two-level hexagon where the reference voltage vector is located by calculating a simple formula. The whole modulation process can be completed by only three steps. Meanwhile, the proposed method is generic for any n-level converter without adding much calculation, which greatly simplifies the modulation process. Experimental results have been provided, which verify the effectiveness and generality of the proposed SVM scheme for two types of multi-level converters.

A simplified space vector based current controller for any general N-level converter

2010 ◽  
Author(s):  
Jun Li ◽  
Xiaohu Zhou ◽  
Zhigang Liang ◽  
Subhashish Bhattacharya ◽  
Alex Q. Huang
Keyword(s):  
Space Vector ◽  
N Level ◽  
Current Controller ◽  
Level Converter

A Simple Space Vector PWM Generation Scheme for Any General $n$-Level Inverter

2009 ◽  
Vol 56 (5) ◽  
pp. 1649-1656 ◽  
Author(s):  
Aneesh Mohamed A. S. ◽  
Anish Gopinath ◽  
M. R. Baiju
Keyword(s):  
Space Vector Pwm ◽  
Space Vector ◽  
N Level

scholarly journals A Space Vector PWM Scheme for Three level Inverters Based on Two-Level Space Vector PWM

2011 ◽  
pp. 6-10
Author(s):  
D. Sandhya Rani ◽  
A. Appaprao
Keyword(s):  
Pulse Width Modulation ◽  
Multilevel Inverter ◽  
Superior Performance ◽  
Space Vector Pwm ◽  
Space Vector ◽  
Medium Voltage ◽  
Multilevel Inverters ◽  
N Level ◽  
Simple Mapping ◽  
Selection Of

Multilevel inverters are increasingly being used in high-power medium voltage applications due to their superior performance compared to two-level inverters. Among various modulation techniques for a multilevel inverter, the space vector pulse width modulation (SVPWM) is widely used. The complexity is due to the difficulty in determining the location of the reference vector, the calculation of ontimes, and the determination and selection of switching states. This paper proposes a general SVPWM algorithm for multilevel inverters based on standard two-level SVPWM. Since the proposed multilevel SVPWM method uses two-level modulation to calculate the on-times, the computation of on-times for an n-level inverter becomes easier. The proposed method uses a simple mapping to achieve the SVPWM for a multilevel inverter. A general n-level implementation is explained, and experimental results are given for two-level and three-level inverters.

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