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.  

Research on a Novel Non Dead-Time Compensation Two-Phase Modulation SVPWM Control Strategy

2012 ◽  
Vol 546-547 ◽  
pp. 1050-1055
Author(s):  
Bao Lian Liu ◽  
De Fei Jin
Keyword(s):  
Control Strategy ◽  
Phase Modulation ◽  
Pulse Width ◽  
Pulse Width Modulation ◽  
Dead Time ◽  
Modulation Method ◽  
Two Phase ◽  
Switching Losses ◽  
Dead Time Compensation ◽  
Switching State

A space vector pulse-width modulation (SVPWM) strategy was developed to solve the failure of traditional SVPWM. A two-phase modulation method is adopted basing on the analyses of traditional SVPWM to select the null switching state in each sector according to the power factor angle. As a result, when the current is crossing zero, the corresponding phase does not commute and dead-time compensation is avoided; and when the current is nearing the peak, the corresponding phase also don’t commute, which leads to lower switching losses. The simulation and experimental results validate that the proposed strategy can effectively improve the current wave, minimize the current distortion and reduce the switching losses. Furthermore, the algorithm is easy to implement.

Implementation and Comparative Analysis of Time Equivalent Space Vector PWM Method for 3 Phase to 3 Phase Matrix Converter

2021 ◽  
Vol 54 (4) ◽  
pp. 617-622
Author(s):  
Akhilesh Kumar ◽  
Pradip K. Sadhu ◽  
Jay Singh
Keyword(s):  
Comparative Analysis ◽  
Pulse Width ◽  
Pulse Width Modulation ◽  
Harmonic Distortion ◽  
Matrix Converter ◽  
Total Harmonic Distortion ◽  
Modulation Method ◽  
Space Vector Pwm ◽  
Space Vector ◽  
Bidirectional Power Flow

Nowadays, the matrix converter (MC) has become the prominent power converter. Its unique qualities like single-stage ac to ac conversion, bidirectional power flow, sinusoidal response, unity power factor, and no need for dc-link makes it superior among all power converters. This archival literature investigates the various pulse width modulation (PWM) methods and proposed a novel pulse width modulation (PWM) method named Time Equivalent space vector pulse width modulation. In this article this novel modulation method is compared with exiting carrier-based pulse width control and space vector control methods for a 3 phase to 3 phase matrix converters. Simulation model is built in Matlab and comparative analysis based on total harmonic distortion (THD) will be given for different methods. Simulation results revealed that total harmonic distortion (THD) of Time Equivalent space vector PWM is least so this novel method is best and more efficient in comparison to others.

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.

scholarly journals Software In-The-Loop Simulation of an Advanced SVM Technique for 2ϕ-Inverter Control Fed a TPIM as Wind Turbine Emulator

Electronics ◽  
2022 ◽  
Vol 11 (2) ◽  
pp. 187
Author(s):  
Intissar Moussa ◽  
Adel Khedher
Keyword(s):  
Wind Turbine ◽  
Pulse Width ◽  
Pulse Width Modulation ◽  
Small Scale ◽  
Modulation Scheme ◽  
Space Vector ◽  
Two Phase ◽  
Phase Inverter ◽  
Vector Modulation ◽  
Scheme Selection

An appropriate modulation scheme selection ensures inverter performance. Thus, space vector modulation (SVM) is more efficient and has its own distinct advantages compared to other pulse width modulation (PWM) techniques. This work deals with the development of an advanced space vector pulse width modulation (SVM) technique for two-phase inverter control using an XSG library to ensure rapid prototyping of the controller FPGA implementation. The proposed architecture is applied digitally and in real time to drive a two-phase induction motor (TPIM) for small-scale wind turbine emulation (WTE) profiles in laboratories with minimum current ripple and torque oscillation. Four space voltage vectors generated for the used SVM technique do not contain a zero vector. Hence, for an adequate adjustment of these four vectors, a reference voltage vector located in the square locus is determined. Considering the asymmetry between the main and auxiliary windings, the TPIM behavior, which is fed through the advanced SVM controlled-two-phase inverter (2ϕ-inverter), is studied, allowing us to control the speed and the torque under different conditions for wind turbine emulation. Several quantities, such as electromagnetic torque, rotor fluxes, stator currents and speed, are analyzed. To validate the obtained results using both Simulink and XSG interfaces, the static and dynamic characteristics of the WTE are satisfactorily reproduced. The collected speed and torque errors between the reference and actual waveforms show low rates, proving emulator controller effectiveness.

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.

scholarly journals Reduced Switch Count in Space Vector PWM for Three-Level NPC Inverter

Energies ◽  
2020 ◽  
Vol 13 (22) ◽  
pp. 5945 ◽  
Author(s):  
Ryszard Beniak ◽  
Krzysztof Górecki ◽  
Piotr Paduch ◽  
Krzysztof Rogowski
Keyword(s):  
Pulse Width ◽  
Pulse Width Modulation ◽  
Digital Signal ◽  
Prediction Algorithm ◽  
Practical Implementation ◽  
Space Vector Pwm ◽  
Space Vector ◽  
Power Transistors ◽  
Digital Signal Controller ◽  
Dual Core

The aim of this paper is to present the real-time implementation and measurements of a reduced switch count in space vector pulse width modulation for three-level neutral point clamped inverters (3L-NPC). We implement space vector pulse width modulation, which uses a prediction algorithm to reduce the number of switches in power transistors (switch count) by up to about 13%. The algorithm applies additional redundant voltage vectors. The method is compute-intensive and was implemented on a dual-core TMS320F28379D digital signal controller. The latest measurements of steady and dynamic states of electric drive, powered by a 3L-NPC inverter using this method, confirmed the possibility of using this method in practical implementation. The implementation and results of the measurements are presented in this paper.

Study on the New SVPWM Method for Three-Level Inverter of Brushless Doubly-Fed Machine

2012 ◽  
Vol 619 ◽  
pp. 156-159 ◽  
Author(s):  
Yan Liu ◽  
Xu Wang ◽  
Yan Xing ◽  
Dan Yang
Keyword(s):  
Pulse Width Modulation ◽  
Neutral Point ◽  
Virtual Space ◽  
Modulation Method ◽  
Space Vector ◽  
Constant Frequency ◽  
Voltage Balance ◽  
Doubly Fed ◽  
Vector Modulation ◽  
Doubly Fed Machine

Brushless doubly-fed machine (BDFM) is a new type of AC induction motor.It has a good applicable prospect as the variable frequency motors or the variable speed constant frequency generators. Although the advantage of the three-level inverter, there are also some problems of neutral point voltage balance in this method such as the unbalance of neutral point voltage. And the traditional principle of Three-level inverter space vector pulse width modulation method is to estimate the sectors and calculating a lot of trigonometric functions. To solve these problems, a novel method for the virtual space vector concept in G-H coordinate system is presented in this paper. The method proposed can omit the judging process of the sectors, reduce the calculating burden, and maintain the balance of neutral-point voltage between capacitances within a certain index modulation. The results of simulation are given to validate the improved virtual space vector modulation.

scholarly journals COMPARISON OF METHODS FOR COMPENSATION FOR DAMAGE TO H-CELLS IN HIGH-VOLTAGE CASCADE FREQUENCY CONVERTERS

2021 ◽  
Vol 3 (55) ◽  
pp. 24-31
Author(s):  
V. Busher ◽  
◽  
O. Glazeva ◽  
Du Xin ◽  
◽  
...  
Keyword(s):  
High Voltage ◽  
Pulse Width ◽  
Pulse Width Modulation ◽  
Comparison Of Methods ◽  
Space Vector Pwm ◽  
Space Vector ◽  
Line Voltage ◽  
Third Harmonic ◽  
Frequency Converters ◽  
Voltage Frequency

Purpose. The aim of this work is to find a method of controlling high-voltage frequency converters that would provide the smallest voltage drop on the motor, the least loads and oscillation of electromagnetic torque in an accident modes, and evaluate the effectiveness of pulse width modulation (PWM) methods with the injection of third harmonic and space-vector PWM in emergency modes. Methodology. We have applied the mathematical simulation of the electric drive “High voltage frequency converter with cascaded H-bridges – High power asynchronous machine” in Matlab/SimPowerSystem software for comparison of four PWM types – Sinusoidal PWM (SPWM), Balanced sinusoidal PWM (BSPWM), Balanced PWM with injected third harmonic (THPWM) and Space Vector PWM (SVPWM). Results. The method of balancing the line voltage minimizes shock loads during the transition from normal to emergency mode due to such a shift of the zero point and rotation of the phase vectors, in which the amplitude of the line voltage decreases to the minimum possible value, the spatial position of linear vectors remains unchanged. The conditions of optimal injection of the 3rd harmonic are found, which increases the efficiency of power supply use by 7… 30 % in comparison with symmetric sinusoidal PWM. But in some accidents (6-4-4, 4-3-2, 3-2-2) the 3rd harmonic is not effective. The method of balancing the space vectors provides the same conditions and increases the utilization of power supplies by 15.6 %, regardless of the number of damaged modules, which increases the amplitude of the 1st harmonic in case of accidents by 10 ... 26 % compared with sinusoidal PWM. Comparison of methods of space vector PWM (SVPWM), balancing of phase-to-phase voltage with the injection of the 3rd harmonic (THPWM) with sinusoidal PWM shows that SVPWM is the best method at damage of one or two modules and during normal work of the converter (except for the 3-3-2 configuration), ie in the most common cases. Originality. For the first time, a comparison of all methods of pulse-width modulation in emergency modes and the optimal method for each type of accident for 3-6-stage frequency converters is indicated. Practical value of the work is to provide the necessary mathematical apparatus for calculating signals using BSPWM, THPWM and SVPWM in emergency modes. References 17, table 1, figures 6.

scholarly journals Torque Ripple Reduction in Brushless DC Motor by Using SPWM and SVPWM Techniques

2018 ◽  
Vol 7 (4.24) ◽  
pp. 71
Author(s):  
Ch.N. Narasimha Rao ◽  
G. Durga Sukumar ◽  
R. Vinod Kumar
Keyword(s):  
Pulse Width Modulation ◽  
Control Method ◽  
Fuzzy Controller ◽  
Torque Ripple ◽  
Bldc Motor ◽  
Space Vector Pwm ◽  
Space Vector ◽  
Brushless Dc Motors ◽  
Frequency Space ◽  
Brushless Dc

Brushless DC motors have the large applications because of its easiest control system and the highest efficiency. Industrial BLDC motor drives suffers from the ripples in the torque, due to which motor has more noise, vibrations and less efficient. To reduce the ripple, the Space Vector PWM (SVPWM) and Sinusoidal PWM are implemented in BLDC drive. The Pulse Width Modulation (PWM) controls the converter output voltage and frequency. Space Vector PWM (SVPWM)and Sinusoidal PWM are the best techniques used in industries because its easy design. Space Vector PWM control method is implemented and it overcomes the disadvantages in PWM such as losses in switching of the converter, output harmonic content& provides better DC-bus voltages. The torque ripples are also reduced in SVPWM method compared to SPWM method. In this paper BLDC motor with a fuzzy controller is presented and the comparison in performance of SVPWM &SPWM methods presented. The SVPWM makes the drive has less ripple in torque& noiseless operation. The Matlab/Simulink models of SVPWM and SPWM method with fuzzy controlled BLDC motor also presented.

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