austin hughes electric motors and drives solutions

... 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

... 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

... 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 ... 2009. IECON ’09. 35th Annual Conference of IEEE, pp. 1003 –1008. 160 Electric Machines and Drives Electric Machines and Drives 168 Are all possible operating conditions optimized varying ... 3. Motor parameter identified in simulation. 154 Electric Machines and Drives Swarm Intelligence Based Controller for Electric Machines and Hybrid Electric Vehicles Applications 163 r M L lM L mq L lr + - (1/k) ω r λ dr + - V qs r r i qs i qr R qf...

Ngày tải lên: 21/06/2014, 01:20

... Electric Machines and Hybrid Electric Vehicles Applications 191 (a) The power sharing between FC and SC on NEDC driving cycle (b) The power sharing between FC and ... 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 ... voltages and currents under unbalanced voltage supply with reduced DC-link capacitance without compensation. Electric Machines and Drives 194 Sixth International Symposium on Micro Machine and...

Ngày tải lên: 21/06/2014, 01:20

... (L las , L lbs ) and (L mas , L mbs ) indicate the stator leakage inductance and magnetizing inductance, respectively, and L lr and L mr indicate the rotor leakage inductance and magnetizing ... 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 ... Correa et al. (2004). The transformation matrix and its application can be written as Electric Machines and Drives 226 voltage vector and then will be synthesized by a PWM technique (Jabbar...

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

... precluding and reducing credit risks helps the bank prevent and minimize damage, stabilize profit, maintain economic security, and maintain prestige and brand. In doing credit business, prestige and ... Coal Company in bridge and road constructing project. • Grow credit and keep the business safe and effective. Continue to solve overdue debts, restructure lending money and maintain overdue debts ... combined industry, are currency and credit center, and the level to encourage the development of the economy. Therefore, the quality and the growth level of the capital and capital lending activities...

Ngày tải lên: 27/10/2012, 16:49

... activities. 1.5.Working capital demand and the driving factors behind Working capital demand always changes and depend on many factors. In there, we need to care about following the fomula and the main factors ... better quality products more and more increasingly. In the context, quality and quantity are the main factors which can help the company to expand and affirm its brand. So, the Pham Thi Mai Huong ... the market and forcast business conditions frequently. Besides, find out about customer demand and competitior`s activities in domestic and foreign countries. Variety of allocating and selling...

Ngày tải lên: 01/12/2012, 10:21

... Typical evacuating building made by RC frames and slabs CONCRETE SLABS 1 TYPHOONS AND TECHNICAL SOLUTIONS RECOMMENDED FOR EXISTING AND NEW HOUSES IN THE CYCLONIC REGIONS IN VIETNAM ... prevention and mitigations. Keywords: Disaster mitigation; technical solutions; tropical cyclones; typhoons; and wind disasters. 1 Introduction In 1995, a design code TCVN 2737:1995 Loads and ... season is between September and November, and is the most intense in October and November. There are 1 to 2 typhoons hitting the region in a year. The typhoon density and the percentage of strong...

Ngày tải lên: 01/04/2013, 22:47

... namely : In 2006, business capital 954.698.725 thousand dongs. Its value growed 199.592.549 thousand dongs and present at 1.154.291.274 thousand dongs. It increased relatively of high speed, equivalent ... fluctuations of goods and material costs which are being used in produce and business of the enterprises. + The gap between enterprises and selling market . + Conditions and means of transportation ... Working capital’s structure and driving factors behind 4 1.1.4. Working capital resources 4 1.1.5.Working capital demand and the driving factors behind 5 1.2. Working capital and its importance in...

Ngày tải lên: 25/04/2013, 14:45

... Transport Solutions Why LoopStar 700? LoopStar ® 700 Next Generation Ethernet Access and Transport Solutions This 4-slot product is optimized for larger customers, multi-tenant buildings and service aggregation ... required. LoopStar 722 Mix of expandable and fixed ports scales from small to large customer sites L OOP S TAR ® 700 Next Generation Ethernet Access and Transport Solutions The NEBS 3 certified ... next- generation solutions of a packet-based network. LoopStar 745 and LoopStar 745P Higher speed Ethernet and multi-services over DS3 With two customer-facing 10/100Base-T Ethernet ports and four or...

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