New Three-Dimensional Space Vector-Based Switching Signal Generation Technique Without Null Vectors and With Reduced Switching Losses for a Grid-Connected Four-Leg Inverter

2016 ◽  
Vol 31 (2) ◽  
pp. 1026-1035 ◽  
Author(s):  
Heli Golwala ◽  
R. Chudamani
Keyword(s):  
Dimensional Space ◽  
Three Dimensional ◽  
Signal Generation ◽  
Space Vector ◽  
Generation Technique ◽  
Switching Signal ◽  
Switching Losses ◽  
Three Dimensional Space

A Fast Digital 3D-SVPWM Algorithm for Four-Leg Converter

2014 ◽  
Vol 541-542 ◽  
pp. 494-497
Author(s):  
Peng Xian Song ◽  
Ping Wang ◽  
Yao Hua Li
Keyword(s):  
Mathematical Model ◽  
Computer Simulation ◽  
Coordinate Transformation ◽  
Dimensional Space ◽  
Three Dimensional ◽  
Space Vector Pwm ◽  
Space Vector ◽  
Computational Burden ◽  
Three Phase ◽  
Three Dimensional Space

The three-phase four-leg converter can be obtained by adding a bridge into the traditional three-phase three-leg converter. The average mathematical model of three-phase four-leg converter is described in this paper. The three-dimensional space vector PWM (3D-SVPWM) is analyzed. For simplifying the modulation, a fast digital SVPWM algorithm which eliminates coordinate transformation and saves calculating time was proposed. The feasibility of the proposed modulation technique is verified by computer simulation. These results show that the proposed fast digital 3D-SVPWM technique can be easily implemented without conventional computational burden.

Three-Dimensional Space Vector Modulation Strategy for Capacitor Balancing in Split Inductor Neutral-Point Clamped Multilevel Inverters

2018 ◽  
Vol 27 (14) ◽  
pp. 1850232 ◽  
Author(s):  
Palanisamy Ramasamy ◽  
Vijayakumar Krishnasamy ◽  
Mohamed Ali Jagabar Sathik ◽  
Ziad M. Ali ◽  
Shady H. E. Abdel Aleem
Keyword(s):  
Dimensional Space ◽  
Computational Cost ◽  
Three Dimensional ◽  
Neutral Point ◽  
Space Vector Modulation ◽  
Space Vector ◽  
Field Programmable ◽  
Vector Modulation ◽  
Switching Method ◽  
Three Dimensional Space

Capacitor imbalance is one of the major drawbacks of a neutral-point clamped multilevel inverter (NPC-MLI). The capacitor imbalance rises due to the nonuniform switching, nonideal DC link capacitors, improper commutation, and various asymmetrical phase currents in switching states. The imbalance can be minimized by using proper switching using a redundancy switching method and avoiding the usage of medium vectors. The computational cost of this system is to be decided by the level of the inverter system. This paper presents a comprehensive three-dimensional space vector modulation (3D-SVM) strategy to eliminate the imbalance in the DC link capacitor voltage, which is across the applied input DC source. The technique is easy to implement without using any trigonometric functions, lookup tables, or angle determinations. This proposed scheme has been verified using MATLAB Simulink and authenticated using field-programmable gate array (FPGA) controller.

Quaternions and Vector Mapping in Three-Dimensional Space

2012 ◽  
Vol 235 ◽  
pp. 101-106
Author(s):  
Gui San Li
Keyword(s):  
Dimensional Space ◽  
Three Dimensional ◽  
Unit Vector ◽  
Geometric Representation ◽  
Space Vector ◽  
Vector Operation ◽  
Spatial Mechanism ◽  
Multiplication Operation ◽  
Vector Mapping ◽  
Three Dimensional Space

On the basis of analyzing the relations between vector operation and properties of multiplication operation of quaternions, the geometric representation and mapping of quaternions and vectors defined in three-dimensional space are established. The mathmatic operation of space vector, in addition to any space unit vector, rotating around three coordinate axises is carried based on the utilization of quaternions.The main purpose of this paper is to solve the issues of mathmatic tools introduced in spatial mechanism analysises and integrations by making use of quatnions.

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