Stability analysis

In low-cost permanent magnet synchronous motor (PMSM) drive systems, the rotor position is usually estimated based on the back-electromotive force. However, such estimation methods have the common drawback of having large errors in low-speed regions. In order to solve that drawback in the startup phase, the I-f startup method is studied as its compatibility with the FOC control structure. The purpose of such a method is to make the motor accelerate and overcome the low-speed threshold.

8p vialicene 02-07-2024 0 0   Download

This paper presents the impacts of Electric Vehicle Charging Stations (EVCSs) on voltage and frequency quality in the Microgrid. It addresses security analysis, voltage and frequency quality, as well as issues related to EVCSs. In this paper, modeling and simulation method is utilized to evaluate the impact of Charging Stations (CSs) in Microgrid power systems using PowerWorld software.

13p viwalton 02-07-2024 2 1   Download

Part 1 of ebook "Nonlinear analysis of thin-walled structures: Statics, dynamics, and stability" provides readers with contents including: Chapter 1 - Mechanics of solids; Chapter 2 - Thin plates and shells; Chapter 3 - Nonlinear static analysis;...

253p mothoiphong 28-06-2024 1 1   Download

Part 2 of ebook "Nonlinear analysis of thin-walled structures: Statics, dynamics, and stability" provides readers with contents including: Chapter 4 - Vibrations of structures; Chapter 5 - Nonlinear dynamics; Chapter 6 - Stability of structures; Chapter 7 - Dynamic stability;...

272p mothoiphong 28-06-2024 1 1   Download

Part 1 of ebook "Stability analysis and design of structures" provides readers with contents including: Chapter 1 - Introduction; Chapter 2 - Basic principles; Chapter 3 - Rigid-body assemblages; Chapter 4 - Buckling of axially loaded members (columns); Chapter 5 - Stability analysis of beam-columns;...

221p mothoiphong 28-06-2024 2 1   Download

Part 2 of ebook "Stability analysis and design of structures" provides readers with contents including: Chapter 6 - Stability analysis of frames; Chapter 7 - Buckling of members having open sections; Chapter 8 - Elastic buckling of thin flat plates; Chapter 9 - Stability analysis of arches, rings and shells; Chapter 10 - Inelastic buckling of structures; Chapter 11 - Structural design for stability of members;...

320p mothoiphong 28-06-2024 3 1   Download

Part 1 of ebook "Steel framed structures: Stability and strength" provides readers with contents including: Chapter 1 - Frame instability and the plastic design of rigid frames; Chapter 2 - Matrix methods of analysis of multi-storeyed sway frames; Chapter 3 - Design of multi-storey steel frames to sway deflection limitations; Chapter 4 - Interbraced columns and beams; Chapter 5 - Elastic stability of rigidly and semi-rigidly connected unbraced frames;...

156p mothoiphong 28-06-2024 2 1   Download

Nurses turnover intention, representing the extent to which nurses express a desire to leave their current positions, is a critical global public health challenge. This issue significantly affects the healthcare workforce, contributing to disruptions in healthcare delivery and organizational stability.

11p vishanshan 27-06-2024 3 1   Download

Part 2 of ebook "A variational approach to structural analysis" provides readers with contents including: Chapter 4 - Complementary virtual work; Chapter 5 - Some energy methods; Chapter 6 - Some static and dynamic stability concepts;...

210p mothoiphong 28-06-2024 2 1   Download

In this paper, polyvinyl butyral (PVB) composite coating was prepared with graphene oxide (GO) to improve mechanical properties, corrosion protection, and thermal oxidation stability. Fourier-transform infrared spectroscopy (FT-IR), Thermogravimetric analysis (TGA), Field Emission Scanning Electron Microscopy (FESEM),... were used to examine the results.

9p viambani 18-06-2024 1 0   Download

Part 2 book "Power system operations and electricity markets" includes content: Methods for economically operating a power system, power generation control, new reliability and control concepts, available transfer capability, network congestion and transmission loading relief, the use of power flow and stability analysis tools, technology needs for the electric power industry.

54p dianmotminh03 17-06-2024 0 0   Download

Part 2 book "The electric power engineering handbook - Power system stability and control" includes content: Power system dynamic modeling, wide area monitoring and situational awareness, assessment of power system stability and dynamic security performance, power system dynamic interaction with turbine generators, wind power integration in power systems,flexible ac transmission systems (facts), energy management, generation control - economic dispatch and unit commitment, state estimation, optimal power flow, security analysis.

227p dianmotminh03 17-06-2024 0 0   Download

Part 1 book "Basic structures for engineers and architects" includes content: What is structural engineering; learn the language; how do structures (and parts of structures) behave; force, mass and weight; loading – dead or alive; equilibrium – a balanced approach; more about forces - resultants and components; moments; reactions; different types of support – and what's a pin; a few words about stability; introduction to the analysis of pin-jointed frames; method of resolution at joints.

142p dianmotminh03 03-06-2024 4 1   Download

Part 2 of ebook "Reinforced concrete deep beams" provides readers with contents including: Chapter 6 - Deep beams under top and bottom loading; Chapter 7 - Shear strength prediction-softened truss model; Chapter 8 - Shear strength prediction — plastic method; Chapter 9 - Finite element analysis; Chapter 10 - Stability and strength of slender concrete deep beams;...

147p giangdongdinh 28-05-2024 2 2   Download

Part 1 of ebook "Finite element analysis and design of steel and steel-concrete composite bridges" provides readers with contents including: Chapter 1 - Introduction; Chapter 2 - Nonlinear material behavior of the bridge components; Chapter 3 - Applied loads and stability of steel and steel-concrete composite bridges;...

227p giangdongdinh 28-05-2024 3 2   Download

Part 2 book "Power system stability and control" includes content: Direct stability methods; power system stability controls; power system dynamic modeling; integrated dynamic information for the western power system - wams analysis in 2005, dynamic security assessment; power system dynamic interaction with turbine generators; generation control - economic dispatch and unit commitment; state estimation; optimal power flow; security analysis.

198p dianmotminh01 20-05-2024 4 1   Download

An analytical approach of nonlinear buckling and postbuckling analysis of core-corrugated functionally graded carbon nanotubes reinforced composite (FG- CNTRC) cylindrical panels under axial compression is presented in the present study. A homogenization technique is applied for the corrugated core with thermal effects. The nonlinear stability equation system of panels is formulated by using the Donnell thin shell theory with the von Kármán geometrical nonlinearities.

9p dathienlang1012 03-05-2024 2 0   Download

Part 2 book "Analysis of synchronous machines" includes contents: Power system transient stability, excitation systems and dynamic stability, naturally commutated synchronous motor drives, extension of d–q theory to unbalanced operation, linearization of the synchronous machine equations, computer simulation of synchronous machines.

277p dianmotminh01 14-05-2024 3 0   Download

Part 2 book "Fundamentals of electric power engineering" includes contents: Introduction to power systems, fault analysis, transformers, synchronous generators, power flow analysis and stability of power systems, induction machines, ower semiconductor devices, rectifiers, inverters, DC-to-DC converters (Choppers).

294p dianmotminh01 14-05-2024 3 1   Download

The wave function regards like localized orbital locator, electron localized function, average localized ionization energy and non-covalent interaction are also examined as a means of theoretical evidence of the titled compound. The NBO calculations probe the intermolecular and intramolecular movement of charges, and additionally the molecule's stability. The ADMET properties are also considered for the compound with the assistance of Swiss ADMET online tool.

17p dianmotminh02 03-05-2024 1 1   Download