scholarly journals Design of Angle based 27-level Trinary Ladder Inverter Using Cross Compiler

2021 ◽  
Vol 11 (2) ◽  
pp. 616-628
Author(s):  
Dr. Joseph Anthony Prathap ◽  
Priyanka Bandaru ◽  
Vaishnavi Darshanam ◽  
B. Narendar
Keyword(s):  
Parametric Analysis ◽  
Low Voltage ◽  
Matlab Simulink ◽  
Half Height ◽  
Multi Level ◽  
Inverter Circuit ◽  
And Performance ◽  
Parameter Values ◽  
Vhdl Code

This paper presents the design of the Multi-Level Inverter circuit based on the switched ladder topology using the angle events for the level changes. The change of events for the inverter is formulated using the Half Height Algorithm. The VHDL code is utilized for the generation of the angles as digital equivalence with the resolution of 27 bits. In ladder topology, there are several types of inverter namely Binary Ladder Inverter, Ye Progression, Luo Progression. Among all these topologies, the Trinary Ladder topology is advantageous for the number of levels attainment with the less number of switches. Also, the carrier-based modulation is erroneous with the High THD% and low Voltage Parameter values. The use of the non-carrier half-height method manipulates the accurate angle to measure acceptable THD %. The proposed Trinary Switched Ladder Inverter is cross-compiled with Xilinx Vivado and Matlab Simulink Took to evaluate the parameters such as THD%, VRMS, VPEAK, for the 27-level. The parametric analysis exhibits improvement in the proposed Ladder topology with cost, size, and performance when synthesized using the Xilinx Vivado tool.

scholarly journals Harmonic cancellation in a Multi-level Inverter Configuration Suitable for PV Applications

2018 ◽  
Vol 7 (4.6) ◽  
pp. 177
Author(s):  
Kiran Kumar Nallamekala ◽  
K. Venkat Raman ◽  
Md. Asif
Keyword(s):  
Lower Order ◽  
Switching Frequency ◽  
Matlab Simulink ◽  
Dc Voltage ◽  
Capacitor Banks ◽  
Multi Level ◽  
Inverter Circuit ◽  
Harmonic Cancellation ◽  
Switching Devices

Multi-level inverters are playing a major role in PV based systems because of numerous advantages like low dv/dt, better harmonic profile so on. But, conventional multi-level inverters consist of some drawbacks like capacitor balancing issues, greater requirement of capacitor banks and clamping diodes. To address these issues, a novel multi-level inverter has been presented in this paper, which can function as a seven-level, five-level and three-level inverter. The inverter circuit utilizes six switching devices and two isolated DC voltage sources.  Moreover, when it is operated as a three-level inverter, a unipolar PWM technique is applied to the circuit which shifts all the lower order harmonics to twice of switching frequency whereas in conventional multi-level inverters, all the harmonics of lower order are present around switching frequency. In addition, proposed inverter can operate even if some switching devices of the circuit fails. Also, the behavior of the inverter during the failure of some switching devices and DC source is analyzed. The proposed inverter is simulated in MATLAB/Simulink and the results are also discussed.  

Angular Resolved Electron Spectroscopy with Parallel Recording

1990 ◽  
Vol 48 (2) ◽  
pp. 370-371
Author(s):  
Huang Min ◽  
P.S. Flora ◽  
C.J. Harland ◽  
J.A. Venables
Keyword(s):  
Electron Spectroscopy ◽  
Low Voltage ◽  
Solid Angle ◽  
Detection System ◽  
Voltage Electron ◽  
Cylindrical Mirror ◽  
Inner Radius ◽  
Channel Plate ◽  
And Performance ◽  
Type Detector

A cylindrical mirror analyser (CMA) has been built with a parallel recording detection system. It is being used for angular resolved electron spectroscopy (ARES) within a SEM. The CMA has been optimised for imaging applications; the inner cylinder contains a magnetically focused and scanned, 30kV, SEM electron-optical column. The CMA has a large inner radius (50.8mm) and a large collection solid angle (Ω > 1sterad). An energy resolution (ΔE/E) of 1-2% has been achieved. The design and performance of the combination SEM/CMA instrument has been described previously and the CMA and detector system has been used for low voltage electron spectroscopy. Here we discuss the use of the CMA for ARES and present some preliminary results.The CMA has been designed for an axis-to-ring focus and uses an annular type detector. This detector consists of a channel-plate/YAG/mirror assembly which is optically coupled to either a photomultiplier for spectroscopy or a TV camera for parallel detection.

Parametric analysis and performance of laser cutting on strenx steel

2020 ◽  
Author(s):  
K. Muralidharan ◽  
S. Shalini Packiam Kamala ◽  
D. Alankrutha ◽  
K. Bhanu Prakash ◽  
Ram Subbiah ◽  
...  
Keyword(s):  
Laser Cutting ◽  
Parametric Analysis ◽  
And Performance

scholarly journals Information processing using the Kalman filter in Matlab Simulink

2021 ◽  
pp. 49-62
Author(s):  
Vladimir F. Telezhkin ◽  
◽  
Bekhruz B. Saidov ◽  
Keyword(s):  
Kalman Filter ◽  
Control Systems ◽  
Measurement Data ◽  
Control Device ◽  
Software Systems ◽  
Automated Control ◽  
Matlab Simulink ◽  
Software Algorithms ◽  
And Performance ◽  
Filter Noise

In this paper, we investigate the problem of improving data quality using the Kalman filter in Matlab Simulink. Recently, this filter has become one of the most common algorithms for filtering and processing data in the implementation of control systems (including automated control systems) and the creation of software systems for digital filtering from noise and interference, for example, speech signals. It is also widely used in many fields of science and technology. Due to its simplicity and efficiency, it can be found in GPS receivers, in devices for processing sensor readings for various purposes, etc. It is known that one of the important tasks that should be solved in systems for processing sensor readings is the ability to detect and filter noise. Sensor noise leads to unstable measurement data. This, of course, ultimately leads to a decrease in the accuracy and performance of the control device. One of the methods that can be used to solve the problem of optimal filtering is the development of cybernetic algorithms based on the Kalman and Wiener filters. The filtering process can be carried out in two forms, namely: hardware and software algorithms. Hardware filtering can be built electronically. However, it is less efficient as it requires additional circuitry in the system. To overcome this obstacle, you can use filtering in the form of programming algorithms in a single method. In addition to the fact that it does not require electronic hardware circuitry, the filtering performed is even more accurate because it uses a computational process. The paper analyzes the results of applying the Kalman filter to eliminate errors when measuring the coordinates of the tracked target, to obtain a "smoothed" trajectory and shows the results of the filter development process when processing an electrocardiogram. The development of the Kalman filter algorithm is based on the procedure of recursive assessment of the measured state of the research object.

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