scholarly journals Discontinuous Space Vector PWM Strategy for Three-Phase Three-Level Electric Vehicle Traction Inverter Fed Two-Phase Load

2020 ◽  
Vol 11 (1) ◽  
pp. 27 ◽  
Author(s):  
Guozheng Zhang ◽  
Yuwei Wan ◽  
Zhixin Wang ◽  
Le Gao ◽  
Zhanqing Zhou ◽  
...  
Keyword(s):  
Pulse Width Modulation ◽  
Short Circuit ◽  
Neutral Point ◽  
Vector Diagram ◽  
Switching Loss ◽  
Output Current ◽  
Space Vector ◽  
Two Phase ◽  
Three Phase ◽  
Load Conditions

Discontinuous pulse width modulation (DPWM) strategies are usually adopted to reduce the switching loss and output current ripple of three-phase three-level traction inverters under three-phase load conditions. However, if there is a short circuit in any arbitrary phase or the inverter is used to feed a two-phase load, the output performance of conventional DPWM strategies will be deteriorated. Here, four improved DPWM (IDPWM) strategies for three-phase three-level neutral-point-clamped (NPC) traction inverter fed two-phase load are proposed. Unlike three-phase load conditions, the phase angle and the amplitude of each basic voltage vector in the space vector diagram are modified under two-phase load conditions. Consequently, sectors are re-divided and duty cycles of basic vectors during synthesis are recalculated. Clamping intervals of each phase for the four type discontinuous PWM (DPWM) strategies are rearranged according to the modified space vector diagram; then, the proposed DPWM strategies can be obtained. Compared with the conventional DPWM strategies, the output current waveform quality of the proposed strategy is significantly improved. Meanwhile, the amplitude of the neutral-point voltage ripple is also reduced.

Optimal space vector pulse width modulation strategy of neutral point clamped three‐level inverter for output current ripple reduction

2017 ◽  
Vol 10 (12) ◽  
pp. 1638-1646 ◽  
Author(s):  
Wei Chen ◽  
Wenkai Dai ◽  
Zhiqiang Wang ◽  
Guozheng Zhang ◽  
Yan Yan ◽  
...  
Keyword(s):  
Pulse Width ◽  
Pulse Width Modulation ◽  
Neutral Point ◽  
Output Current ◽  
Space Vector ◽  
Ripple Reduction ◽  
Optimal Space ◽  
Current Ripple

scholarly journals Virtual Space Vector Pulse Width Modulation for Asymmetric T-Type Neutral Point Clamped 3-Level Inverter

2021 ◽  
Vol 2021 ◽  
pp. 1-19
Author(s):  
Nam Xuan Doan ◽  
Nho Van Nguyen
Keyword(s):  
Pulse Width ◽  
Pulse Width Modulation ◽  
Low Cost ◽  
Comparative Investigation ◽  
Neutral Point ◽  
Virtual Space ◽  
Vector Diagram ◽  
Space Vector ◽  
Output Performance ◽  
Obvious Benefit

This paper proposes a novel 3-phase asymmetric 3-level T-type NPC inverter and studies its PWM performance using a virtual space vector pulse width modulation control strategy. Firstly, the mathematical model and characteristics of this economical topology are described. Then, a virtual space vector approach is proposed to build a space vector diagram for designing SVPWM control. Similar to the conventional 3-level NPC inverter, the asymmetric inverter can also work with the neutral point voltage self-balancing in a fundamental period, which enables employment of this topology in various applications. Finally, simulation and experiment results under different load conditions have shown good output performance of the asymmetric 3-level topology. Similar tests are also performed on both conventional 2-level and 3-level inverters for comparison. For an almost similar number of different voltage vectors in the space vector diagram, the asymmetric 3-level topology can compete with conventional 3-level inverters for low-cost applications. The obvious benefit of the asymmetric 3-level inverter is a smaller number of switches devices while it can achieve output performance similar to that of the conventional 3-level. The comparative investigation also shows that the total loss given by SVPWM for the asymmetric 3-level configuration is lower than that of the traditional 3-level inverter.

scholarly journals Space Vector Pulse Width Modulation Method to Reducing a Switching Loss in Inverter

2018 ◽  
Vol 7 (2.25) ◽  
pp. 160
Author(s):  
S. M.Revathi ◽  
C. R.Balamurugan ◽  
N. Shanmugasundaram
Keyword(s):  
Phase Modulation ◽  
Pulse Width Modulation ◽  
Modulation Method ◽  
Switching Loss ◽  
Space Vector Pwm ◽  
Space Vector ◽  
Two Phase ◽  
Area Unit ◽  
Present Section ◽  
Wounded Area

In This paper proposed an area space  vector PWM technique  that reduces switch  victims of an electrical converter  mainly efficiently by two-phase modulation technique. This technique chooses the most favorable one  that  minimizes  a replacement  switch (SW) defeat judgment  supported lessening belongings in switch period allowing for  section currents in numerous lessening patterns. This paper proposes  an  basic  curved  PWM  technique . The  planned  technique  created  it  attainable  to  scale  back  range  of  switch  of  the  biggest  or  second  major present  section .  And it will  mechanically  acclimatize  to  weight  circumstances  with  varied  power factors. Calculated switch wounded area unit condensed to regarding  50%  by the planned technique.  

scholarly journals Performance of Neutral Point Clamped Five Level Inverter Using Space Vector Modulation Control Fed by DPC-VF-SVM Rectifier

2021 ◽  
Vol 16 ◽  
pp. 275-287
Author(s):  
Djamila Cherifi ◽  
Yahia Miloud ◽  
Mohamed Mostefai
Keyword(s):  
Pulse Width Modulation ◽  
Control Method ◽  
Neutral Point ◽  
Voltage Source ◽  
Space Vector Modulation ◽  
Space Vector ◽  
Three Phase ◽  
Bus Voltage ◽  
Non Linear Load ◽  
Vector Modulation

The purpose of this paper is to develop a control and regulation method for the input DC voltage of a five level neutral point clamping (NPC) inverter feeding a induction motor. In this context, the authors propose in the first part, the control strategy of three-phase pulse width modulation rectifier, they propose the virtual flux-based direct control (DPC_VF) with vector modulation (SVM), this method is applied for the enhancement of network power quality by compensation of harmonic currents produced by an non linear load, and good regulation of DC-bus voltage. The second part of the paper is dedicated to the presentation of the model of the three phase, five-level NPC voltage source inverter with its space vector modulation (SVM) control method. The performance of the proposed strategy in terms of out-put voltage and THD has studied successfully and shown using MATLAB/Simulink.

Optimized Non-Dead-Time Control of Inverter with Two-Phase Modulated SVPWM

2012 ◽  
Vol 562-564 ◽  
pp. 1531-1536
Author(s):  
Ming Xing Zhu ◽  
Jing Bo Shi
Keyword(s):  
Control Strategy ◽  
Pulse Width Modulation ◽  
Dead Time ◽  
Control Method ◽  
Short Circuit ◽  
Two Phase ◽  
Zero Crossing ◽  
Time Control ◽  
Bus Voltage ◽  
Current Zero

In the inverter control system, two-phase modulated space vector pulse width modulation (SVPWM) algorithm has the advantages of minimum switch loss and higher utilization of direct current (DC) bus voltage. Non-dead-time control strategy can eliminate the problems of the dead time effects. But the traditional non-dead-time control strategy heavily depends on the current zero-crossing detection, which may cause the output voltage distortion or even a short circuit. Based on the analysis of the reason for the distortion, a new optimized non-dead-time control method is proposed. Two methods for the detection of the overlapping area are enumerated. The conclusions are confirmed by the simulation results with MATLAB/ SIMULINK.

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