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.

scholarly journals Basic Comparison and Evaluation of Functionality AC-AC Matrix Converter Concepts for HEV Vehicle - Part II

2020 ◽  
Vol 22 (2) ◽  
pp. 73-78
Author(s):  
Branislav Dobrucky ◽  
Slavomir Kascak ◽  
Michal Prazenica ◽  
Roman Konarik
Keyword(s):  
Electric Vehicle ◽  
Hybrid Electric Vehicle ◽  
Theoretical Study ◽  
Induction Motors ◽  
Matrix Converter ◽  
Matrix Converters ◽  
The Matrix ◽  
Simulation Results ◽  
Hybrid Electric

The paper deals with a modeling and simulation of the direct AC-AC propulsion system and compares two matrix converter concepts with five-phase traction induction motors (IM) for the hybrid electric vehicle (HEV). The simulation results of [3x5] matrix converter and 4Q-converter are done using Matlab-Simulink environment. Part I deals with a theoretical study of converter concepts for hybrid electric vehicle, since the configurations of [3x5]+[0x5] matrix converters with five-phase motor(s) have not been analyzed so far. Based on simulation results the comparison and evaluation of the property and quality of the quantities of different type of the matrix powertrain are discussed in Part II.

Harmonic Instability at Sending End of the Exceedingly Weak HVDC System

2013 ◽  
Vol 347-350 ◽  
pp. 1343-1347
Author(s):  
Wen Jia Cao ◽  
Jun Wen ◽  
Shu Qing Ma ◽  
Jun Ru Xue ◽  
Hai Ning Zhang ◽  
...  
Keyword(s):  
Theoretical Analysis ◽  
Direct Current ◽  
Theoretical Basis ◽  
System Model ◽  
Switching Function ◽  
Hvdc System ◽  
Hvdc Transmission ◽  
High Voltage Direct Current ◽  
Whole Process ◽  
Study Results

As the development of high voltage direct current (HVDC) transmission, the problems of harmonic instability become more prevalent. Besides, harmonic instability in exceedingly weak HVDC systems is particularly serious. The modulation of the DC converter based on switching function is deduced. By considering the whole process of harmonic transferring at the AC and DC side through converters from the perspective of circuit, the generation conditions of harmonic instability are analyzed. Then an exceedingly weak HVDC system model is established and simulated in PSCAD/EMTDC software to verify the theoretical analysis. The study results provide theoretical basis and computational methods to solve the problems of harmonic instability in HVDC systems.

The Analysis of Transient Stability for Four Wheel Steering Automobile with Proportional Control

2011 ◽  
Vol 141 ◽  
pp. 534-538 ◽  
Author(s):  
Zuo Jun Song
Keyword(s):  
Theoretical Analysis ◽  
Dynamic Model ◽  
Transient Response ◽  
Dynamic Equation ◽  
Theoretical Basis ◽  
Transient Stability ◽  
Driver Model ◽  
Stability Studies ◽  
Proportional Control ◽  
Simulation Results

A 4WS automobile dynamic model with two degree-freedom was presented, and it’s dynamic equation and transient response was obtained by theoretical analysis. The simulation on its handling stability was executed with the driver model, and the simulation results showed that a 4WS automobile had a better performance than a 2WS automobile. The calculation and simulation results provided more accurate theoretical basis in automobile stability studies.

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.

Fabrication of Bulk Functionally-Graded Syntactic Foams for Impact Energy Absorption

2012 ◽  
Vol 706-709 ◽  
pp. 711-716 ◽  
Author(s):  
Tadaharu Adachi ◽  
Masahiro Higuchi
Keyword(s):  
Theoretical Analysis ◽  
Energy Absorption ◽  
Functionally Graded ◽  
Fabrication Process ◽  
Syntactic Foams ◽  
Compression Tests ◽  
Matrix Resin ◽  
Local Fracture ◽  
Density Distributions ◽  
The Matrix

Function of functionally-graded (FG) foams as energy absorption material for impact was discussed on the basis of theoretical analysis, and fabrication process of the foams was proposed in the paper. The FG foams were found to be useful as impact absorber due to progressively local fracture or cushion in the theoretical analysis. Next the fabrication process of the FG foams was suggested. The graded dispersion of the micro-balloons was conducted before curing the matrix resin in the process. The density distributions in the FG foams were confirmed to be predicted by the numerical analysis on the basis of floating the micro-balloons. Finally, compression tests were carried out to evaluate mechanical properties.

scholarly journals Current-Mode Third-Order Quadrature Oscillator Using CDTAs

2009 ◽  
Vol 2009 ◽  
pp. 1-5 ◽  
Author(s):  
Jiun-Wei Horng
Keyword(s):  
Theoretical Analysis ◽  
Phase Difference ◽  
Oscillation Frequency ◽  
Current Mode ◽  
Third Order ◽  
Quadrature Oscillator ◽  
Oscillation Condition ◽  
Transconductance Amplifiers ◽  
Simulation Results ◽  
A Current

This paper describes a current-mode third-order quadrature oscillator based on current differencing transconductance amplifiers (CDTAs). Outputs of two current-mode sinusoids with90°phase difference are available in the quadrature oscillator circuit. The oscillation condition and oscillation frequency are orthogonal controllable. The proposed circuit employs only grounded capacitors and is ideal for integration. Simulation results are included to confirm the theoretical analysis.

New repetitive motion planning scheme with cube end-effector planning precision for redundant robotic manipulators

Robotica ◽  
2021 ◽  
pp. 1-22
Author(s):  
Limin Shen ◽  
Yuanmei Wen
Keyword(s):  
Theoretical Analysis ◽  
Motion Planning ◽  
Robotic Manipulators ◽  
Robotic Manipulator ◽  
Repetitive Motion ◽  
End Effector ◽  
Difference Formula ◽  
Planning Scheme ◽  
Simulation Results ◽  
The Difference

Abstract Repetitive motion planning (RMP) is important in operating redundant robotic manipulators. In this paper, a new RMP scheme that is based on the pseudoinverse formulation is proposed for redundant robotic manipulators. Such a scheme is derived from the discretization of an existing RMP scheme by utilizing the difference formula. Then, theoretical analysis and results are presented to show the characteristic of the proposed RMP scheme. That is, this scheme possesses the characteristic of cube pattern in the end-effector planning precision. The proposed RMP scheme is further extended and studied for redundant robotic manipulators under joint constraint. Based on a four-link robotic manipulator, simulation results substantiate the effectiveness and superiority of the proposed RMP scheme and its extended one.

The theoretical analysis and simulation of acoustic absorber for nonlinear shunted loudspeaker

2021 ◽  
Vol 263 (6) ◽  
pp. 388-393
Author(s):  
Wenjiang Wang ◽  
Xianhui Li ◽  
Junjuan Zhao ◽  
Peng Zhang ◽  
Xinyun Li ◽  
...  
Keyword(s):  
Theoretical Analysis ◽  
Sound Absorption ◽  
Nonlinear Term ◽  
Equivalent Model ◽  
Frequency Bandwidth ◽  
Nonlinear Circuit ◽  
Van Der Pol ◽  
Absorption Bandwidth ◽  
Simulation Results ◽  
Different Time Scales

In this paper, a nonlinear electroacoustic absorber based on a tunable loudspeaker is proposed to broaden its sound absorption bandwidth. The main mechanism is a nonlinear circuit is coupled at loudspeaker's terminal. A series of theoretical analysis and simulation work are carried out in this paper. The equivalent model is composed of a linear term describing the loudspeaker and a nonlinear term of a coupled Duffing-van Der Pol bistable circuit. The invariant manifold method is used to solve different time scales. The analysis and simulation results show that the nonlinear circuit can widen the frequency bandwidth of the structure.

scholarly journals Modelling and analysis of a NTVV-SVM based three-level twin-step matrix converter

2018 ◽  
Vol 7 (4) ◽  
pp. 2672
Author(s):  
Shamsher Ansari ◽  
Aseem Chandel ◽  
SMIEEE . ◽  
Zulfiqar Ali Sheikh
Keyword(s):  
High Power ◽  
Theoretical Study ◽  
Matrix Converter ◽  
Matrix Converters ◽  
Output Performance ◽  
The Matrix ◽  
Power Switches ◽  
Converter Topology ◽  
Vector Modulation ◽  
Ac Converters

Recently the tremendous advancement has been seen in the field of matrix converter topology. For high power drive applications, industries often need high power AC-AC converters like three level matrix converter because it is having the ability to generate a set of balanced sine waves for inputs as well as outputs. The three level matrix converters possess better output performance with reduced harmonic contents compared to all two-stage indirect matrix converters. In this matrix converter topology, the idea of neutral-point clamped-VSI is employed to the inversion step of the matrix converter circuitry. To control the power switches the gate signals are produced using NTVV based space vector modulation. To justify the theoretical study a complete model of a three-level twin-step matrix converter has been designed in Matlab/Simulink and its performances are analysed.  

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