XML
-
-
List of Articles
-
Open Access Article
1 - Reduction of Torque Ripples and Radial Force in Segmental SRM Using Current Profiling Method
Milad Allaei Milad Dowlatshahi Sayed Morteza Saghaian-NejadThe torque of the reluctance switch motors is created from the sum of its discrete values, the purpose of which is to create a continuous torque on the motor shaft, causing a phenomenon called torque ripple in the commutation regions. In this paper, in order to reduce t MoreThe torque of the reluctance switch motors is created from the sum of its discrete values, the purpose of which is to create a continuous torque on the motor shaft, causing a phenomenon called torque ripple in the commutation regions. In this paper, in order to reduce the radial force and stabilize the torque, the design of a reluctance switch motor with a discrete rotor structure is simulated using Magnet software. For this purpose, first by examining the radial force acting on the rotor in different currents and situations from the area unaligned to aligned, a function called radial force function is introduced. Then, using the introduced function and the torque-current relationship, the phase reference torque is introduced so that the sum of the torque moments is equal to the reference torque of the motor. For experimental purposes, using Matlab software, the motor circuit and its drive are simulated, and by applying the torque function introduced as the reference torque, the results are compared with the results of the linear torque common function. And the simultaneous representation of the figure of the two radial forces obtained shows that the motor torque ripple is reduced and is almost the same as the torque in the linear common state. This is in a situation where the radial force decreases relative to the radial force of the linear joint torque. Manuscript profile -
Open Access Article
2 - Studying and Simulating the Production Unit System with Hydro Turbine and Investigating the Effect of Transient Droop Compensation on the System Dynamic Behavior
Homa Movahednejad S. Mohammadali Zanjani Majid Moazzami Ghazanfar ShahgholianOne of the important components and rotating equipment in the hydroelectric power plant is the hydro turbine. The rotation of the turbine converts the potential energy in the water into mechanical energy, and then the mechanical energy is converted into electrical energ MoreOne of the important components and rotating equipment in the hydroelectric power plant is the hydro turbine. The rotation of the turbine converts the potential energy in the water into mechanical energy, and then the mechanical energy is converted into electrical energy by the generator. In this paper, the aim is to study the dynamic behavior of a production unit system with a water turbine and to investigate the effect of the loss compensator on the dynamic behavior of the system. In water units, a drop transient compensator is used for stable operation of speed control. The equations of the system are expressed in the state space and the real and oscillatory modes are determined using the system matrix. The simulation results show the stable state of the system due to step changes in the consumption load using the transient compensator. Also, bode diagrams confirm the transfer function of the system's frequency deviation in relation to the changes in the system's steady state load. Manuscript profile -
Open Access Article
3 - Optimal Hardware Accelerator Design for Implementation of BLAKE2b Hash Function Algorithm
Mohsen Dadkhah Atefeh Salimi Nadia HajikhiadaniRecently, there has been a surge in the popularity of cryptocurrencies, which are digital currencies that enabletransactions through a decentralized consensus mechanism. In this paper, one of the most effective Equihashalgorithms subcategories, known as BLAKE2, is prese MoreRecently, there has been a surge in the popularity of cryptocurrencies, which are digital currencies that enabletransactions through a decentralized consensus mechanism. In this paper, one of the most effective Equihashalgorithms subcategories, known as BLAKE2, is presented, and then effort has been made to optimize thecompression function as one of the main and most challenging blocks of the BLAKE2 algorithm. In addition,by cognitive partitioning the algorithm between the software/hardware parts of the device, efforts have beenmade to improve the speed and the number of resource usage. For comparison, implementation was carriedout with high-level vs HDL design methods for full and semi-parallel structures. All three methods wereimplemented using Vivado tools exploiting ZC706 evaluation board. The implementation results indicatedthat the number of resource usage (LUT/FF) and power consumption of the proposed structure is equal to(6575/4726) and 0.316(W) respectively Which has created a significant reduction compared to other methods.Moreover, the hash rate and the energy efficiency of the proposed structure are equal to 50 MHash/s and 6.3(𝑛𝐽/𝐻𝑎𝑠ℎ) respectively Manuscript profile -
Open Access Article
4 - A Review on the Technical Challenges of Connecting Wind Energy Conversion Systems to the Grid
Majid Tavoosi Ehsan Heydarian-Forushani Mohammad Hassan Amirioun Mohsen Parsa MoghaddamWind power generation is making an increasingly significant contribution to global electricity production. The high penetration of wind power poses many operational and control challenges that affects the reliability and stability of power systems. In this Paper, the re MoreWind power generation is making an increasingly significant contribution to global electricity production. The high penetration of wind power poses many operational and control challenges that affects the reliability and stability of power systems. In this Paper, the reported technical challenges caused by the grid integration of wind energy conversion system (WECS) and the proposed solutions methodologies represents. The wind-generating system components and architecture are investigated at the beginning of this article for analysis and stability studies purposes, then are addressed various technical challenges; each challenge is discussed individually, focusing on the bulk integration of wind energy into the power systems. Some solutions, including grids code, energy storage technologies, appropriate control strategies, and other methodologies employed to mitigate the effects of the integration, are also included. This review is ready-reckoner of essential topics for further research of wind energy and available technologies in this field. This review provides ready-reckoner of essential topics for grid integration of wind energy and available technologies in direction of overcome the related difficulties. Manuscript profile -
Open Access Article
5 - Optimizing the Control of DFIG Based Wind Turbines Using Sensitivity Analysis and Particle Swarm Optimization Method
Meysam Jaberolansar Mohammad Mahdi Rezaei Hamed Khodadadi Seyed Mohammad MadaniOne of the key issues in the optimal operation of DFIG-based wind turbines is the optimization of relatively large control parameters that exist in these systems. However, the main problem is the high number of control parameters and the nonlinearity of the model of the MoreOne of the key issues in the optimal operation of DFIG-based wind turbines is the optimization of relatively large control parameters that exist in these systems. However, the main problem is the high number of control parameters and the nonlinearity of the model of these systems, which makes solving the optimization problem very time-consuming and divergent in some cases. In this article, in order to optimize the control parameters, a method based on particle swarm optimization (PSO) is proposed. In this method, after linearization of the system model, the eigenvalues of the system are extracted as a function of the control parameters. By examining the sensitivity of eigenvalues to control parameters, more sensitive parameters are identified and optimized based on the PSO method. The performance of the proposed method has been investigated through simulation in the MATLAB software environment. Manuscript profile -
Open Access Article
6 - Electronic Voting Based on Homomorphic Encryption in Elliptic Curve
Sajjad Rezaee Adaryani Sayyed Mahdi SajadiehToday, elections play an important role in fulfilling democracy, which should be available in all situations. Electronic voting provides a platform to do this anywhere. In this case, there are many electronic selection plans that have good security but do not have the r MoreToday, elections play an important role in fulfilling democracy, which should be available in all situations. Electronic voting provides a platform to do this anywhere. In this case, there are many electronic selection plans that have good security but do not have the required efficiency. In this article, an election plan based on the cryptography of the elliptic curve collective group is expressed, which fulfills the characteristics such as entitlement, confidentiality, without receipt, the impossibility of coercion, and due to the use of the elliptic curve group, along with equivalent security, it has good performance. compared to the designs based on number analysis problem and discrete logarithm problem (with 160-bit elliptic curve key, it has security equivalent to 1024-bit RSA key). Although the elections based on hommorphic cryptography and the discrete logarithm problem are included in Hozti's scheme, but the more robust method presented with the necessary changes and also by presenting a blind signature that fits the voting plan, it has been tried that this method is compared to the issues presented. Manuscript profile
-
The rights to this website are owned by the Raimag Press Management System.
Copyright © 2021-2024