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.

Applications of Two Level SVPWM in the Cascade Multilevel Carrier-Based PWM

2014 ◽  
Vol 556-562 ◽  
pp. 1939-1944
Author(s):  
Zuo Ming Liu ◽  
Zi Qiang Xi ◽  
Chen Guang Yu
Keyword(s):  
Pulse Width ◽  
Output Voltage ◽  
Pulse Width Modulation ◽  
Space Vector Modulation ◽  
Switching Loss ◽  
Space Vector ◽  
Main Work ◽  
Zero Sequence ◽  
Vector Modulation ◽  
Level Converter

First of all, this paper speculates that the essence of the space vector pulse width modulation (SVPWM) is the injection of some kind of zero sequence component through the theoretical analysis. Increasing the range of output voltage and reducing the switching loss are the optimization it can realize, the essential realization method is implemented by changing the placement of zero space vector. Then the method is applied to the cascade multilevel carrier modulation. The main work of this paper is to analyze the relation between SVPWM and the carrier PWM in the two level converter, then add the discrete modulation into the cascade multilevel carrier modulation to verify that the space vector modulation can be realized in cascade multilevel and can get similar results with the two level.

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 Study and implementation of space vector pulse width modulation inverter on an arduino

2021 ◽  
Vol 288 ◽  
pp. 01059
Author(s):  
Ngoc Sy Doan ◽  
Alexey Nikolaevich Tsvetkov ◽  
Thi Hoa Nguyen
Keyword(s):  
Pulse Width ◽  
Pulse Width Modulation ◽  
Hardware Design ◽  
Space Vector Modulation ◽  
Space Vector ◽  
Small Power ◽  
Three Phase ◽  
Design Software ◽  
Vector Modulation ◽  
Experimental Survey

Three-phase two-level inverters using space vector modulation (SVPWM) technology are one of the most popular inverter architectures today. The process of designing and manufacturing inverter systems usually goes through the following stages: simulation, hardware design, software programming on MCU, editing … In this article, we will focus on problem researching and implementing the SVPWM algorithm on an Arduino in detail. Besides, it is also based on the experimental survey of the inverter’s parameters, analyzing and proposing improved solutions for the inverter to operate optimally. SVPWM algorithm is tested on Arduino Mega 2560 board and small power inverter model.

scholarly journals An Improved Hybrid PWM Technique for DC Capacitors Voltage Balance of Five Level DCMLI

2018 ◽  
Vol 7 (2) ◽  
pp. 591
Author(s):  
Narasimha Raju.K ◽  
G.D.V. Sai Pavan.G ◽  
S.V. Harish.S ◽  
Vignesh. R
Keyword(s):  
Pulse Width Modulation ◽  
Space Vector Modulation ◽  
Switching Losses ◽  
Load Demand ◽  
Level Increase ◽  
Voltage Balance ◽  
Multi Level ◽  
Vector Modulation ◽  
Switching State ◽  
Selection Of

The innate problem with five-level Diode Clamped Multi Level Inverter (DCMLI) is imbalance in supply DC capacitor voltages. This paper presents a novel Hybrid Pulse Width Modulation (PWM) technique to stabilize the capacitor voltages. The unbalance in capacitor voltages leads to decrement in inverter level, increase in switching stress and distortion in the output voltage. The existing solutions to this problem use either a back to back connection of inverter and rectifier or external dc sources for each capacitor, but there isn’t a solution which would inherently balance the capacitor voltages of five levels and above for DCMLI. To rectify this problem a novel hybrid PWM technique which is combination of Carrier based PWM (CBPWM) and Space Vector Modulation (SVM) is proposed. As per this technique conventional CBPWM is applied to meet the load demand and SVM is applied at certain selective intervals to balance the capacitors. The novelty lies in selection of appropriate switching state and the interval at which it must be applied to balance the capacitor voltages. This technique is simple to implement and gives rise to less switching losses.

A Generalized Space Vector Modulation for Cascaded H-bridge Multi-level Inverter

2019 ◽  
Author(s):  
Chung Mai Van ◽  
Tu Nguyen Xuan ◽  
Phuong Vu Hoang ◽  
Minh Tran Trong ◽  
Son Pham Cong ◽  
...  
Keyword(s):  
Space Vector Modulation ◽  
Space Vector ◽  
Multi Level ◽  
Vector Modulation
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