electric motors and drives hughes pdf

... 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,...

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Ngày tải lên: 21/06/2014, 01:20

... 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

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

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Ngày tải lên: 28/06/2014, 16:20

... removal and refitting. d) Oil pump - removal, inspection and refitting. e) Camshaft and rocker arms - removal, inspection and refitting. f) Cylinder head - removal and refitting. g) Cylinder head and ... information. 15 Handbrake check and adjustment 2 Refer to Chapter 9. 16 Underbody and fuel/brake line check 1 1 With the vehicle raised and supported on axle stands (see “Jacking and vehicle support”), ... refitting and adjustment. d) Timing belt tensioner and sprockets - removal, inspection and refitting. e) Camshaft oil seal - renewal. f) Camshaft and followers - removal, inspection and refitting. g)...

Ngày tải lên: 23/08/2012, 10:31

... Gloss and Translucency and Rank Sum of Panelist Scores for Strands and Disks Gloss (units) Translucency (%) Sample Instrument Rank Sum Strands Rank Sum Disks Instrument Rank Sum Strands ... units (standard deviation 1.80) and 20.40 units (standard deviation 1.58) (60°); from the hard wheat sample, the mean level was 18.82 units (standard deviation 1.80) and 18.16 units (standard ... between boiled WSN strands and disks for gloss and translucency as assessed by both the panelists and instruments (Table I). Instrumental tests matched human perception for gloss and translucency...

Ngày tải lên: 16/12/2012, 15:25

... researchers: mathematicians and physicists, have an interest in the development of fundamental theory, to understand mechanisms, properties and abili- ties of developed algorithms and in their generalizations ... extensive and appli- cations are so numerous that we are, of course, not able to cover all of them. Our selection and treatment of materials reflects our background and our own research interest and ... blind signal processing techniques and algorithms both from the theoretical and practical point of view. The main objective is to derive and present efficient and simple adaptive algorithms that...

Ngày tải lên: 10/12/2013, 14:15

... files, drives, or network data, and then click Next to continue. 6. The Backup wizard displays the Items to Backup page, prompting you to select the local and network drives, folders, and files ... removable disks and recordable compact discs and optical drives. To successfully back up and restore data on a computer running Windows 2000, you must have the appropriate permissions and user rights ... of backing up and restoring data and the permissions required for these tasks. !" Prepare for backing up data by identifying the folders to back up and the backup type and backup media...

Ngày tải lên: 10/12/2013, 16:15