The Research of Output Voltage Error of Matrix Converter Decreased under Low Switch Frequency

2014 ◽  
Vol 971-973 ◽  
pp. 1194-1197
Author(s):  
Yi Hui Xia ◽  
Xiao Feng Zhang ◽  
Ming Zhong Qiao
Keyword(s):  
Theoretical Analysis ◽  
High Power ◽  
Output Voltage ◽  
Bipolar Transistors ◽  
Matrix Converter ◽  
Input Current ◽  
Insulated Gate Bipolar Transistors ◽  
Pulse Modulation ◽  
Average Value ◽  
Simulation Results

Its switch frequency can’?t be high because of the restrains of insulated gate bipolar transistors (IGBTS) when high power electrical motor driven by matrix converter. This paper mainly discuses about the reason for output voltage error with low switch frequency. And based on the reasons, a method for decreasing output voltage error is proposed, that is to say that referenced input current and output voltage is calculated by using their average value in one sample in the indirect space vector pulse modulation (ISVPWM) when switch frequency is low. Simulation results coincide with theoretical analysis, verifying that the proposed method is feasible and theoretical analysis is right.

Simulation and Implementation of Single Phase Boost – Buck Rectifier Using SPMC Topology with Reduced Input Current THD

2014 ◽  
Vol 592-594 ◽  
pp. 2199-2203
Author(s):  
Ajay Giri ◽  
Lalit Mohan Saini
Keyword(s):  
Output Voltage ◽  
Single Phase ◽  
Pulse Width Modulation ◽  
Matrix Converter ◽  
Input Current ◽  
Current Harmonics ◽  
Switching Algorithm ◽  
Converter Topology ◽  
Simulation Results ◽  
Boost Rectifier

Simulation of single phase buck boost rectifier with reduced input current THD using single phase matrix converter topology is describing in this paper. Due to the bidirectional feather the operation for buck-boost rectifier can be made through matrix converter topology. And this is possible by the proper switching algorithm to control the switches for their boost and buck operation. The input current nature is almost sinusoidal with low current total current harmonics and the level of THD is below than limit that was defined in the standards of IEEE. With the proper variation in modulation index corresponding changes in the output voltage is observed of buck-boost rectifier. For the synthesis of the output voltage Pulse width modulation (PWM) technique is used. The simulation results using MATLAB/Simulink are providing to validate the feasibility of this proposed method

scholarly journals Non-conventional Cascade Multilevel Inverter with Lower Number of Switches by Using Multilevel PWM

2021 ◽  
Vol 17 (1) ◽  
pp. 1-13
Author(s):  
Adala Abdali ◽  
Ali Abdulabbas ◽  
Habeeb Nekad
Keyword(s):  
High Voltage ◽  
High Power ◽  
Power Loss ◽  
Output Voltage ◽  
Lower Number ◽  
Multilevel Inverter ◽  
Three Phase ◽  
Multi Level ◽  
Simulation Results ◽  
Circuit Configuration

The multilevel inverter is attracting the specialist in medium and high voltage applications, among its types, the cascade H bridge Multi-Level Inverter (MLI), commonly used for high power and high voltage applications. The main advantage of the conventional cascade (MLI) is generated a large number of output voltage levels but it demands a large number of components that produce complexity in the control circuit, and high cost. Along these lines, this paper presents a brief about the non-conventional cascade multilevel topologies that can produce a high number of output voltage levels with the least components. The non-conventional cascade (MLI) in this paper was built to reduce the number of switches, simplify the circuit configuration, uncomplicated control, and minimize the system cost. Besides, it reduces THD and increases efficiency. Two topologies of non-conventional cascade MLI three phase, the Nine level and Seventeen level are presented. The PWM technique is used to control the switches. The simulation results show a better performance for both topologies. THD, the power loss and the efficiency of the two topologies are calculated and drawn to the different values of the Modulation index (ma).

Why There Is No IGBT Traction Rectifiers?

2014 ◽  
Author(s):  
Vitaly Gelman
Keyword(s):  
High Power ◽  
Power Converters ◽  
Reactive Power ◽  
Bipolar Transistors ◽  
Insulated Gate Bipolar Transistors ◽  
Pwm Rectifiers ◽  
Traction Power ◽  
Power Substations

The Insulated Gate Bipolar Transistors (IGBT) are widely used in high power converters. Definite advantages of IGBT rectifiers (also called PWM rectifiers) are: zero reactive power, low harmonics, and inherent power recuperation capability. However stationary traction rectifiers are built with either thyristors or diodes, not with IGBTs. The paper compares IGBT and thyristor rectifiers and analyzes the factors precluding the use of IGBT rectifiers at traction power substations.

Study on Matrix Converter Direct Switching Function Modulation Algorithm

2014 ◽  
Vol 556-562 ◽  
pp. 1913-1916
Author(s):  
Jian Wei Liang ◽  
Tao Wang ◽  
Chao Zhang ◽  
Dong Chen
Keyword(s):  
Theoretical Analysis ◽  
Theoretical Basis ◽  
Hardware Design ◽  
Matrix Converter ◽  
Operating Principle ◽  
Switching Function ◽  
The Matrix ◽  
Simulation Results

This paper includes the topology and operating principle of matrix converter, and switching function modulation algorithm of the matrix converter is analyzed in detail. Simulation results based on Simulink7.11 are also provided, the result shows a good verification of theoretical analysis, and it provides a theoretical basis for the next research and software/hardware design of matrix converter.

The Modulation Index Optimization of Microwave Photonic Frequency Conversion Using Double-Sideband Suppressed-Carrier and Balance Detection

2015 ◽  
Vol 713-715 ◽  
pp. 475-478
Author(s):  
Wei Jiang ◽  
Qing Gui Tan ◽  
Dong Liang ◽  
Xiao Jun Li ◽  
Zhong Bo Zhu
Keyword(s):  
Theoretical Analysis ◽  
High Power ◽  
Frequency Conversion ◽  
High Harmonic ◽  
Modulation Index ◽  
Harmonic Suppression ◽  
Microwave Photonic ◽  
Mach Zehnder Modulator ◽  
Simulation Results

In this paper, on basis of DPMZM (Dual-Parallel Mach-Zehnder Modulator), an approach for microwave photonic frequency conversion using DSSC(double-sideband suppressed-carrier) and balance detection is demonstrated. DSSC and balance detection were used to realize high harmonic suppression, and achieve frequency conversion signal with high power and high spectrum purity. In addition, theoretical analysis and simulation results show that the optimal modulation index is m1=2, m2=1.81, and the harmonic suppression is greater than 30dB.

scholarly journals Multilevel neutral point clamped/H-bridge inverters with sinusoidal pulse width modulation

2021 ◽  
Author(s):  
Arifur Rahman Shohel
Keyword(s):  
Computer Simulation ◽  
Theoretical Analysis ◽  
High Power ◽  
Pulse Width ◽  
Output Voltage ◽  
Pulse Width Modulation ◽  
Neutral Point ◽  
Medium Voltage ◽  
Modulation Technique ◽  
Sinusoidal Pulse Width Modulation

This project focuses on the topology of multilevel neutral point clamped (NPC)/H-bridge inverters and their modified modulation technique for high-power (megawatts) medium voltage (typically 6000 v) applications. A sinusodial pulse width in-phase disposition modulation is proposed for five-level NPC/H-bridge inverters. The inverter achieves good harmonic performance and low dv/dt in its output voltage waveforms in comparison to the conventional three-level NPC inverter. A seven-level NPC/H-bridge topology and its sinusodial pulse width in-phase disposition modulation are also proposed and investigated, which has better performance than the five-level inverters. Theoretical analysis and computer simulation are carried out for the proposed inverter topologies and algorithms. The output voltage waveforms and harmonic performance are verified by experiments on a five-level NPC/H-bridge inverters.

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