electric magnetic and static fields

... discuss electric power, power systems, and the various equipments and functions involved Chapter covers basic electric power and electrical engineering concepts: voltage, current, and power, and ... perspectives: electricity and electric power itself – how the use of electric power developed and how that fueled the industry; technical – how the equipment, systems, and technology developed and evolved; ... Principles and Applications, Second Edition, J Lewis Blackburn Understanding Electric Utilities and De-Regulation, Lorrin Philipson and H Lee Willis Electrical Power Cable Engineering, William A Thue Electric...

Ngày tải lên: 31/12/2013, 22:00

... (IEC) sets the standards Or at least many countries base their standards very closely on the IEC standards (for example, Germany's VDE 0530 standard and Great Britain's BS 2613 Standard closely ... 34-1 standard) The NEMA and IEC standards are quite similar, although they sometimes use different terminology Thus, if one understands the IEC nameplate, it is fairly easy to understand a NEMA ... National Electric Manufacturers Association (NEMA) sets motor standards, including what should go on the nameplate (NEMA Standard MG 1-10.40 "Nameplate Marking for Medium Single-Phase and Polyphase...

Ngày tải lên: 12/01/2014, 10:43

Ngày tải lên: 07/03/2014, 10:20

... Industry Classification System O&M operations and maintenance PG&E Pacific Gas and Electric Company R&D research and development RCRA Resource Conservation and Recovery Act SCE Southern California ... making Attaining a better understanding of the customer’s world will assist Pacific Gas and Electric Company (PG&E) and Southern California Edison (SCE) in their design and implementation of industrial ... Coated and Laminated Packaging Paper and Plastics Film Manufacturing 322222 Coated and Laminated Paper Manufacturing 322224 Uncoated Paper and Multiwall Bag Manufacturing 322231 Die-cut Paper and...

Ngày tải lên: 09/03/2014, 00:20

... nanoparticles and thin ferrite films [5-12] Especially, superparamagnetic properties of Ni-Zn ferrite for nano-bio fusion applications ware reported [13] In this paper we study magnetic and electric ... interaction and we suppose in our studied samples there is canting structure as illustrated in Fig 2, where ϕ is the angle between direction of magnetic moment of A ions and magnetic moment of B1 and ... the spin order and magnetic behavior of samples, the field-cooled (FC) and zero field-cooled (ZFC) magnetization measurements were performed in magnetic field of 20 Oe (Fig ) The FC and ZFC curves...

Ngày tải lên: 22/03/2014, 11:20

... tourism, trade and investment, information and communication technology and population and migration In line with the current inter-agency coordination mechanism mandated by the Economic and Social ... Economic and Social Affairs, the United Nations Conference on Trade and Development (UNCTAD) and other members of the Executive Committee on Economic and Social Affairs, to assess all mandates ... General Assembly on the review of mandates, reform of the Economic and Social Council and its enhanced role and establishment of the Peacebuilding Commission Reforms and programmatic adjustments Member...

Ngày tải lên: 23/03/2014, 21:20

... Click on each option and drag it to the relevant box Networking documents and databases - Lesson Web standards and static websites – page Limitations of Simple Static Website To add a new ... documents Networking documents and databases - Lesson Web standards and static websites – page Limitations of Simple Static website There’s another general limitation of static websites, which comes ... the server from the remote client Networking documents and databases - Lesson Web standards and static websites – page Building a Simple Static Website So, a website is a site (location) on the...

Ngày tải lên: 31/03/2014, 20:20

... THE ELECTRIC Flow of electric energy, the CIRCUIT electric field and its components The electromagnetic field, the electrostatic field and the power consumption, and their relation to current and ... Capacity and the dielectric constant of materials The disruptive strength of materials, and its effect on the electrostatic field of the circuit Power consumption 11 in changing magnetic and static magnetic ... conversion of electric energy into and from the electromagnetic and electrostatic stress is not complete, but a That is, loss of energy occurs, especially with the magnetic field in the magnetic materials,...

Ngày tải lên: 04/06/2014, 12:34

... as shown in Figure We can create magnetic and electric potentials underneath a superconducting plate and a ferromagnetic strip [17, 18] The relevant magnetic and electric fields are directed perpendicular ... electric and magnetic barrier The transmission and spin orientation (see Figure 4a,b) become very different from that of the pure magnetic barrier case The interplay between electric barrier and ... now for a pure magnetic barrier with B = 1, and V = Figure 4: The same as Figure 2, but now for a combined electric and magnetic barrier with B = 1, and V = Figure 5: Conductance and Fano factor...

Ngày tải lên: 20/06/2014, 20:20

... uncoated (a) and coated with silica shell (b) the width of hysteresis loop and the magnetic moment decrease due to the substitution of the magnetic Co element by Zn element which is a non -magnetic ... with silica shell and fired at 400°C show a ferromagnetic behavior and high diffuse reflectance compared with all uncoated and coated nanoparticles due to the presence of zinc ions and the silica ... gel The gel was dried and fired at temperatures of 400°C, 600°C, and 800°C for h to form CoFe2O4 (CF), ZnFe2O4 (ZF), and Co0.5Zn0.5Fe2O4 (CZF) nanoparticles Silica-coated magnetic nanoparticles...

Ngày tải lên: 21/06/2014, 01:20

... failure conditions, and modelling of electric or magnetic quantities in electric machines Several chapters give an insight into the problem of minimizing losses in electric machines and increasing ... current and maximum torque, as worsen the power factor 4 Electric Machines and Drives • Magnetic losses ∆Pm occurring in the stator and rotor laminations are caused by the hysteresis and eddy ... Institute of Electrical and Electronics Engineers (IEEE) “Standard Test Procedure for Polyphase Induction Motors and Generators” IEEE 112-B and in its Canadian CSA 390 adaptation The standard first...

Ngày tải lên: 21/06/2014, 01:20

... place incentives and voluntary measures for the energy efficiency of electric motors is not sufficient, as it is prerequisite to implement mandatory measures for 12 Electric Machines and Drives larger ... Conference on Electrical and Computer Engineering, Vancouver, 2007 Benhaddadi M., Olivier G.: (2004) “Including Kyoto in electrical engineering curriculum,” IEEE Canadian Conference on Electrical and Computer ... legislate against recalcitrant and to impose to market the gradual approach of the « carrot and the stick », where the carrot represents the incentives and the stick stands for refractory The authors...

Ngày tải lên: 21/06/2014, 01:20

... and K = with e 3 sin cos 2 xqd and x stand for two-dimensional voltage ux and stator current vector, respectively on (q-d) and (-)reference frame The relations between mechanical and electrical ... accelerated to 150 rad/s at 0.5 s and then decelerated in steps to 100 rad/s, 50 rad/s and 10 rad/s at 1.5 s, s and 4.5 s respectively Fig 17 shows the estimation results and response of the loaded ... of low and medium IM servomechanism; such as belt conveyors, cranes, electric vehicles, pumps, fans, etc The absence of this sensor (speed, position or torque) reduces cost and size, and increases...

Ngày tải lên: 21/06/2014, 01:20

... variables1 prime mover torque and speed, (τLG , ω G ), and rotor and stator voltages and currents, (vrG , irG ), (vsG , isG ), respectively The IM, on the other hand, is a two–port system with ... power 116 Electric Machines and Drives of the fully laminated cores is assumed to be infinite, and saturation, iron losses, end winding and slot effects are neglected Only linear magnetic materials ... hand, is a two–port system with port variables motor load torque and speed, (τLM , ω M ), and stator voltages and currents The DFIG and the IM are coupled through the interconnection vsG isG = =...

Ngày tải lên: 21/06/2014, 01:20

... gure L lsi and L lri are the stator and rotor leakage inductances, r is the speed rotor, ri is the electromagnetic ux and Ni is the number of turns for auxiliary winding or axis d and for main ... control law (with K p and Ki are proportional and integral gains) is given below: d d BvrG = B K p (isG isG ) + Ki (isG isG ) (78) 138 (V) rGa rGb 50 &v Electric Machines and Drives v 50 mM & ... IM speed and to keep internal signals bounded Figure 30 shows the DFIG rotor currents irGa and irGb, and their references over a period of time Again, these currents are sinusoidal and bounded...

Ngày tải lên: 21/06/2014, 01:20

... obtain all electric parameters of the induction machines without the requirement of any previous test and derivative filters Simulation 158 Measured and simulated currents Electric Machines and Drives ... in electric drives The excellent characteristics of PSO may be successfully used to optimize the performance of electric machines and electric drives in many aspects It is estimated that, electric ... optimal power sharing between sources and optimal design with minimum cost, minimum fuel consumption, and maximum efficiency for Electric Vehicles (EVs) and Hybrid Electric Vehicles (HEVs) Their selection...

Ngày tải lên: 21/06/2014, 01:20

... windings Te : electromagnetic torque J : inertia of motor λds,qs : stator flux(d and q axis) : rotor flux(d and q axis) λdr,qr Vds,qs : stator voltage (d and q axis) : stator current (d and q axis) ids,qs ... voltages and currents and Figure shows the DC-link current and voltage It can be seen that both electrical quantities in the DC bus are smooth with no visible pulsations Fig Phase voltages and currents ... optimization (PSO) used to achieve the best performance for the electric machines and electric drives In addition, by analyzing and comparing the results, it is shown that control strategy based...

Ngày tải lên: 21/06/2014, 01:20

... self-inductance and their respective mutual inductance The stator and rotor resistance are denoted by rds , rqs , rr The motor electromagnetic-torque and the load torque are indicated by Te and Tm , ... references and estimated values of torque and flux magnitude and also uses the position of the estimated flux vector The torque and flux magnitude error signals are the inputs to the torque and flux ... + eqs (49) (50) assuming the terms eds and eqs as feed-forward elements and given by (51) and (52), and considering the terms that indicate the asymmetry and disturbance negligible: eds = − Lsrd...

Ngày tải lên: 21/06/2014, 01:20

... 230 Fig Commanded and estimated torque (Nm) Fig 10 Commanded and estimated flux Fig 11 Stator currents in stator flux reference frame Electric Machines and Drives Space Vector PWM-DTC ... P C.; O Wasynczuk, O and Sudhoff, S D (1995) Analysis of Electric Machinery Piscataway, NJ: IEEE Press Neves, F A S.; Landin, R P.; Filho, E B S.; Lins, Z D.; Cruz, J M S and Accioly, A G H (2002) ... 246 Electric Machines and Drives It is clear, that as the other methods the determination of the tetrahedron T ( x , y , z ) allows the selection of the three vectors Vx , Vy and Vz , and the...

Ngày tải lên: 21/06/2014, 01:20

... of voltage and current control for distributed generation systems,” IEEE Trans Energy Convers., vol 21, no 2, pp 516–526, Jun 2006 258 Electric Machines and Drives [5] C A Quinn and N Mohan, ... Hosseini, Tohid Nouri2 and Mehran Sabahi, “A Novel Hybrid Active Filter for Power Quality Improvement and Neutral Current Cancellation,” International Conference on Electrical and Electronics Engineering, ... Portillo,E Galvan and J M Carrasco, "A SVM3D generalized algorithm for multilevel converters" Proc IEEE IECON.'03, 2003 pp 24-29 260 Electric Machines and Drives [36] M Aredes, J Hafner, and K Heumann,...

Ngày tải lên: 21/06/2014, 01:20