Parasitic Consideration of Package Design within Press Pack IGBT

2013 ◽  
Vol 433-435 ◽  
pp. 1782-1785
Author(s):  
Peng Zhang ◽  
Rong Gang Han ◽  
Wen Guang Liu ◽  
Ying Ying Su ◽  
Rui Jin ◽  
...  
Keyword(s):  
Theoretical Analysis ◽  
Current Distribution ◽  
Simulation Software ◽  
Simulation Technology ◽  
New Approach ◽  
Package Design ◽  
Simulation Results

Simulation technology provides a powerful tool for the package design. Parasitic are one of the most important factors for press pack IGBT. By the aid of the simulation software, the package parasitic is extracted and the current distribution among paralleled chips is analyzed. Simulation results confirm the theoretical analysis and verify the efficacy of the new approach.

Simulation and Research of Dynamic Voltage Detection and Regulator Based on MATLAB

2014 ◽  
Vol 536-537 ◽  
pp. 1527-1531
Author(s):  
Ya Feng Li ◽  
Zi Wei Zheng
Keyword(s):  
Theoretical Analysis ◽  
Reactive Power ◽  
Voltage Regulator ◽  
New Approach ◽  
Dynamic Voltage ◽  
Harmonic Voltage ◽  
Simulation Results ◽  
Harmonic Source ◽  
Detecting Method ◽  
Dynamic Voltage Regulator

The Series Dynamic Voltage Regulator can compensate the harmonics distortion caused by voltage type harmonic source This paper presents a new approach of detecting harmonic voltage in dq0 coordinates, based on the generalized instantaneous reactive power ,and used in the series dynamic voltage regulator successfully. It is demonstrated by theoretical analysis and simulation results that the proposed detecting method of harmonic voltage is correct and valid.

scholarly journals Type Synthesis, Modelling and Analysis of the Manipulator for Wheel-Legged Robot

2016 ◽  
Vol 10 (2) ◽  
pp. 87-91
Author(s):  
Jarosław Szrek ◽  
Artur Muraszkowski ◽  
Przemysław Sperzyński
Keyword(s):  
Simulation Software ◽  
Dynamics Simulation ◽  
Mobile Manipulator ◽  
Mobile Manipulators ◽  
Legged Robot ◽  
Type Synthesis ◽  
Structural Synthesis ◽  
New Approach ◽  
Basic Dimension ◽  
Simulation Results

Abstract The aim of this article is to present the concept of wheel-legged mobile manipulator, which is a combination of mobile platform with specially selected suspension system and a manipulator. First, a literature review was performed and own solution proposed. The kinematic structure of manipulator, selected simulation results, physical model and the concept of the control system has been presented. Geometry synthesis was used to design basic dimension. Structural synthesis was performed according to the intermediate chain method. Simulations were performed using the multibody dynamics simulation software. New approach in the field of the mobile manipulators was presented as a result.

The Application of Simulation Technology in Distribution Center

2017 ◽  
Vol 865 ◽  
pp. 675-680 ◽  
Author(s):  
Yan Jia ◽  
Peng Fei Jiang
Keyword(s):  
Simulation Software ◽  
Distribution Center ◽  
Simulation Technology ◽  
The Third ◽  
Temporary Storage ◽  
Distribution Mode ◽  
Simulation Results

Considering the complexity of workflow in distribution center and the ability of simulation for analysis and optimization of such systems, the application of simulation technology in distribution center is researched in this paper. Taking the distribution center of J mall for example, the third distribution mode of the mall is studied, which procures goods from many suppliers and stores in its own warehouse, then delivers them to the customers according to the different orders. Through the analysis of the Flexsim simulation software, the problems existing in the distribution center are found. And according to the analysis, the improvement suggestions are given and verified by simulation. By comparing the simulation results, it can be concluded that the waiting wastes in receiving area, temporary storage and dispatch area are decreased, and the average utilization rates of the stations become more appropriate. Finally, the output quantities of dispatch area are increased and the efficiency of distribution center is improved.

Kinematics Analysis of Virtual Prototype System on Multiple Redundant Bionic Arm

2014 ◽  
Vol 945-949 ◽  
pp. 1360-1363 ◽  
Author(s):  
Kai Zhao ◽  
Xiu Juan Liu ◽  
Li Min Song ◽  
Chun Guang Wang ◽  
Lei Yuan
Keyword(s):  
Theoretical Analysis ◽  
Virtual Machine ◽  
Future Development ◽  
Development Process ◽  
Simulation Software ◽  
Prototype System ◽  
Kinematics Analysis ◽  
Theory Analysis ◽  
Simulation Test ◽  
Simulation Results

The simulation technology can be very convenient for the kinematics analysis of the virtual machine system. It not only simplifies the development process of product design, but also verifies the correctness and feasibility of the theory. Based on the theory analysis, simulation test is finished with the simulation software, and the correctness of the theoretical analysis is validated. Through the analysis on the simulation results of the torque, reference for future development of prototype is provided.

scholarly journals A Numerical Study on the Combustion Process and Emission Characteristics of a Natural Gas-Diesel Dual-Fuel Marine Engine at Full Load

Energies ◽  
2021 ◽  
Vol 14 (5) ◽  
pp. 1342
Author(s):  
Van Chien Pham ◽  
Jae-Hyuk Choi ◽  
Beom-Seok Rho ◽  
Jun-Soo Kim ◽  
Kyunam Park ◽  
...  
Keyword(s):  
Natural Gas ◽  
Combustion Process ◽  
Simulation Software ◽  
Dual Fuel ◽  
Injection Timing ◽  
Emission Characteristics ◽  
Cylinder Pressure ◽  
Marine Engine ◽  
Full Load ◽  
Simulation Results

This paper presents research on the combustion and emission characteristics of a four-stroke Natural gas–Diesel dual-fuel marine engine at full load. The AVL FIRE R2018a (AVL List GmbH, Graz, Austria) simulation software was used to conduct three-dimensional simulations of the combustion process and emission formations inside the engine cylinder in both diesel and dual-fuel mode to analyze the in-cylinder pressure, temperature, and emission characteristics. The simulation results were then compared and showed a good agreement with the measured values reported in the engine’s shop test technical data. The simulation results showed reductions in the in-cylinder pressure and temperature peaks by 1.7% and 6.75%, while NO, soot, CO, and CO2 emissions were reduced up to 96%, 96%, 86%, and 15.9%, respectively, in the dual-fuel mode in comparison with the diesel mode. The results also show better and more uniform combustion at the late stage of the combustions inside the cylinder when operating the engine in the dual-fuel mode. Analyzing the emission characteristics and the engine performance when the injection timing varies shows that, operating the engine in the dual-fuel mode with an injection timing of 12 crank angle degrees before the top dead center is the best solution to reduce emissions while keeping the optimal engine power.

scholarly journals A New Approach to the PWM Modulation for the Multiphase Matrix Converters Supplying Loads with Open-End Winding

Energies ◽  
2021 ◽  
Vol 14 (2) ◽  
pp. 466
Author(s):  
Pawel Szczepankowski ◽  
Natalia Strzelecka ◽  
Enrique Romero-Cadaval
Keyword(s):  
Pulse Width Modulation ◽  
Harmonic Distortion ◽  
Simulation Software ◽  
Common Mode ◽  
New Approach ◽  
Matrix Converters ◽  
Load Voltage ◽  
Common Mode Voltage ◽  
The Common ◽  
Open End Winding

This article presents three variants of the Pulse Width Modulation (PWM) for the Double Square Multiphase type Conventional Matrix Converters (DSM-CMC) supplying loads with the open-end winding. The first variant of PWM offers the ability to obtain zero value of the common-mode voltage at the load’s terminals and applies only six switches within the modulation period. The second proposal archives for less Total Harmonic Distortion (THD) of the generated load voltage. The third variant of modulation concerns maximizing the voltage transfer ratio, minimizing the number of switching, and the common-mode voltage cancellation. The discussed modulations are based on the concept of sinusoidal voltage quadrature signals, which can be an effective alternative to the classic space-vector approach. In the proposed approach, the geometrical arrangement of basic vectors needed to synthesize output voltages is built from the less number of vectors, which is equal to the number of the matrix converter’s terminals. The PWM duty cycle computation is performed using only a second-order determinant of the voltages coordinate matrix without using trigonometric functions. A new approach to the PWM duty cycles computing and the load voltage synthesis by 5 × 5 and 12 × 12 topologies has been verified using the PSIM simulation software.

Research on Very Fast Transient over-Voltages Distribution in Large Power Transformer Windings

2012 ◽  
Vol 433-440 ◽  
pp. 7287-7292
Author(s):  
You Hua Gao ◽  
Zeng Feng Lai ◽  
Xiao Ming Liu ◽  
Guo Wei Liu ◽  
Ye Wang
Keyword(s):  
Power Transformer ◽  
Simulation Software ◽  
Large Power ◽  
Telegraph Equations ◽  
Backward Differentiation Formulas ◽  
Space Discretization ◽  
Simulation Results ◽  
Fast Transient ◽  
The Time Domain ◽  
Differentiation Formulas

To analyze the transient response of transformer windings under very fast transient over-voltage (VFTO), multi-conductor transmission line (MTL) model based on the representation of transformer windings by its individual turns are established. Space discretization is needed for solving the time-domain telegraph equations of MTL. To calculate the voltage distributions along transformer windings, through combining the compact finite difference (CFD) theory and the backward differentiation formulas (BDF). Simulation software ATP is introduced, and the simulation results demonstrate that the proposed approach is feasible.

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.

Analysis of HPDC Process with Automobile Part (Oil Pan) by CAE Simulation

2013 ◽  
Vol 753-755 ◽  
pp. 1318-1323 ◽  
Author(s):  
Kwang Kyu Seo ◽  
Hong Kyu Kwon
Keyword(s):  
Die Casting ◽  
Simulation Software ◽  
Filling Process ◽  
Solidification Shrinkage ◽  
Automobile Part ◽  
Computer Aided ◽  
Gate System ◽  
Simulation Results ◽  
Casting Design ◽  
Cae Simulation

In this research, Computer Aided Engineering (CAE) simulation was performed by using the simulation software (AnyCasting) in order to optimize casting design of an automobile part (Oil Pan_7G9E) which is well known and complicated to achieve a good casting layout. The simulation results were analyzed and compared carefully in order to apply them into the production die-casting mold. During the filling process, internal porosities caused by air entrap were predicted and reduced remarkably by the modification of the gate system and the configuration of overflow. With the solidification analysis, internal porosities caused by the solidification shrinkage were predicted and reduced by the modification of the gate system.

Decoding Digital Information from the Cascaded Heterogeneous Chaotic Systems

2003 ◽  
Vol 13 (06) ◽  
pp. 1599-1608 ◽  
Author(s):  
Chao Tao ◽  
Gonghuan Du ◽  
Yu Zhang
Keyword(s):  
Communication System ◽  
Communication Systems ◽  
Chaotic Systems ◽  
Digital Information ◽  
Chaotic Communication ◽  
New Approach ◽  
Communication Scheme ◽  
Simulation Results

In this paper, we propose a new approach to breaking down chaotic communication scheme by attacking its encryption keys. A remarkable advancement is that it can decode the hidden message exactly. This makes it become possible to break down some cascaded chaotic communication systems. We also decode digital information from the cascaded heterogeneous chaotic communication system and give the simulation results.

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