ebook electric motors and drives

... class. Slip - ring motors, commutator motors and brake motors can all be made in flameproof versions. No external parts may cause sparks. The motors must have both an interna l and an external earthing ... 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 ... though, the standards can be grouped into two major categories: NEMA and IEC (and its derivatives). In North America, the National Electric Man ufacturers Association (NEMA) sets motor standards,...

Ngày tải lên: 12/01/2014, 10:43

Ngày tải lên: 12/12/2013, 22:02

... 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 ... Medium voltage motors • Repaired motors • TENV and TEAO enclosures It’s relevant to notice that regulation concerning single phase and three-phase small (42/48 and 56 frame) motors is ready, ... be obtained from orders@intechweb.org Electric Machines and Drives, Edited by Miroslav Chomat p. cm. ISBN 978-953-307-548-8 ELECTRIC MACHINES AND DRIVES Edited by Miroslav Chomat Contents VI Swarm...

Ngày tải lên: 21/06/2014, 01:20

... Canada with the adoption of Standard CAN/CSA- Electric Machines and Drives 14 Fig. 7. Stator Premium motors Fig. 8. Rotor Premium motors Electric Machines and Drives 16 Fig. 11. ... incentives and voluntary measures for the energy efficiency of electric motors is not sufficient, as it is prerequisite to implement mandatory measures for Electric Machines and Drives 22 ... (2008a) “Barriers and incentive policies to high-efficiency motors and drives market penetration,”. IEEE International symposium on power electronics, electrical drives, automation and motion SPEEDAM...

Ngày tải lên: 21/06/2014, 01:20

... estimated speed and reference speed, (i.e. e ω =  ω −ω re f ), a proportional integral compensation is proposed, as follows 100 Electric Machines and Drives Electric Machines and Drives 90 ... jNωL m i s + L r d dt i r + L m d dt i s (26) 102 Electric Machines and Drives where R s , R r , L s and L r are the stator/rotor resistances and inductances, L m is the magnetizing inductance, ... θ 0 sin θ 0 cos θ 0  and K =  2 3 ⎡ ⎢ ⎣ 1 − 1 2 − 1 2 0 − √ 3 2 − √ 3 2 ⎤ ⎥ ⎦ . x qd and x αβ stand for two-dimensional voltage flux and stator current vector, respectively on (q-d) and ( α-β)reference...

Ngày tải lên: 21/06/2014, 01:20

... desired torque, and will be taken as a simple PI controller. The reader is referred to (1) for motivation and additional details on this control configuration. 122 Electric Machines and Drives 0 10 ... variables 1 prime mover torque and speed, (τ LG , ω G ) ,and rotor and stator voltages and currents, (v rG , i rG ), (v sG , i sG ), respectively. The IM, on the other hand, is a two–port system with ... infinite, and saturation, iron losses, end winding and slot effects are neglected. Only linear magnetic materials are considered, and it is further assumed that all parameters are constant and known....

Ngày tải lên: 21/06/2014, 01:20

... voltages v rGa and v rGb , the IM rotor speed ω mM and its estimation ˆ ω mM , the estimated IM load torque ˆ τ ML , and the estimated IM speed, given by 132 Electric Machines and Drives 52.6 52.65 ... à la commande des systèmes électromécaniques,” PhD thesis, Université de Paris XI, France, 2004. [5] W. Leonhard, “Control of electrical drives, ” Spring-Verlag, 1985. [6] M.S. Vicatos and J.A. ... 2002. [13] A. J. van der Schaft, “L 2 –Gain and Passivity Techniques in Nonlinear Control,” Springer–Verlag, Berlin, 1999. 144 Electric Machines and Drives equation ¯ σ q = L sq L rq − L 2 mq , ¯ σ d =...

Ngày tải lên: 21/06/2014, 01:20

Ngày tải lên: 21/06/2014, 01:20

Ngày tải lên: 21/06/2014, 01:20

Ngày tải lên: 21/06/2014, 01:20

Ngày tải lên: 21/06/2014, 01:20

Ngày tải lên: 21/06/2014, 01:20

Ngày tải lên: 28/06/2014, 16:20

Ngày tải lên: 28/06/2014, 16:20

Ngày tải lên: 19/09/2013, 15:53

Ngày tải lên: 31/12/2013, 22:00

... understanding of modern machines and drives. Power electronics are introduced, at the device and systems level, and electrical drives are discussed. Equations are kept to a minimum, and in the examples only ... basic concepts and build the equations and circuits corresponding first to an ideal transformer and then to typical transformers in use. We’ll introduce and work with the per unit system and will cover ... dash-dot. Preface The purpose of these notes is be used to introduce Electrical Engineering students to Electrical Machines, Power Electronics and Electrical Drives. They are primarily to serve our students at MSU:...

Ngày tải lên: 25/01/2014, 13:20

... attached to the concrete, they must be unpainted and free from pollution and dust. Manual for Induction Motors and Generators 24 - Installation and Alignment 3BFP 000 050 R0101 REV C Figure 3-2 ... each work site and safety instructions included in this manual and separate safety instructions delivered with the machine. Manual for Induction Motors and Generators 14 - Transport and Unpacking 3BFP ... 21 Manual for Induction Motors and Generators 12 - Transport and Unpacking 3BFP 000 050 R0101 REV C 2.4 Checks upon arrival and unpacking 2.4.1 Check upon arrival The machine and the package must...

Ngày tải lên: 26/01/2014, 09:20

... Operating asynchronous motors 3.6 Electric motor comparison 3. Motors and loads 50 A Fig. 25 Ward Leonard arrangement A Fig . 26 Comparison of electric motors Summary3. Motors and loads 37 1 2 3 4 5 6 7 8 9 10 11 12 M 3.1 ... phase asynchronous motors 38 3.2 Single-phase motors 42 3.3 Synchronous motors 43 3.4 Direct current motors commonly named DC motors 45 3.5 Operating asynchronous motors 47 3.6 Electric motor comparison ... Other types of synchronous motors To conclude this overview of industrial motors, we can mention linear motors, synchronised asynchronous motors and stepper motors. v Linear motors Their structure...

Ngày tải lên: 15/02/2014, 08:37

... the output of this comparator ( L ) is high, S 1 and S 2 are closed and S 3 and S 4 are open; when L is low, S 3 and S 4 are closed and S 1 and S 2 are open. The action of this type of current ... low and S 1 and S 2 are opened and S 3 and S 4 are close. The armature current decreases until ii aa =− * ε , at which time the comparator output becomes high; S 1 and S 2 are closed and ... to the comparator with hysteresis, is positive and greater than ε . The output of the comparator is high, and S 1 and S 2 are closed and S 3 and S 4 are open. The armature current increases...

Ngày tải lên: 16/02/2014, 18:48