... Slip-ring motors, commutator motorsand brake motors can all be made inflameproof versions.No external parts may cause sparks.The motors must have both an internal and an external earthing screw.Pressurized ... closely on the IEC standards (for example,Germany's VDE 0530 standard and Great Britain's BS 2613 Standardclosely parallel the IEC 34-1 standard).The NEMA and IEC standards are quite ... majorcategories: NEMA and IEC (and its derivatives).In North America, the National Electric Manufacturers Association(NEMA) sets motor standards, including what should go on thenameplate (NEMA Standard...
... measurement method, as described in the Institute of Electrical and Electronics Engineers (IEEE) “Standard Test Procedure for Polyphase Induction Motorsand Generators” IEEE 112-B and in its Canadian ... 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 ChomatContentsVISwarm...
... Canada with the adoption of Standard CAN/CSA- Electric Machines andDrives 14 Fig. 7. Stator Premium motors Fig. 8. Rotor Premium motorsElectric Machines andDrives 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 andDrives 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...
... Lmddtis(26)102 Electric Machines and Drives where Rs, Rr, Ls and Lrare the stator/rotor resistances and inductances, Lmis the magnetizinginductance, J is the rotor inertia, B is the viscous ... f), a proportional integral compensation is proposed, as follows100 Electric Machines and Drives Electric Machines andDrives 90 incorporated into a vector controlled induction motor drive. ... Is=Iqs, Ids, λr=λqr, λdr and Vs=Vqs, Vdsdenote stator current,rotor flux and stator voltage vectors, where subscripts d and q stand for vector components in(q-d) reference...
... ωrΨdrc(62)vd sc = Rrcid sc + L sc did sc dt−ωcL sc iq sc + Lmcdidrcdt−ωcLmciqrcvd sc = R sc id sc +(L sc id sc + Lmcidrc)s −(L sc iq sc + Lmciqrc)ωcvd sc = R sc id sc +dΨd sc dt−ωcΨq sc (63)vdrc= ... ωpΨqrp(58)Electrical system equations for control machine:vq sc = R sc iq sc + L sc diq sc dt+ ωcL sc id sc + Lmcdiqrcdt+ ωcLmcidrcvq sc = R sc iq sc +(L sc iq sc + Lmciqrc)s ... Lmpidrp)ωp126 Electric Machines and Drives The flux linkage current relations are:Ψqrc= L sc iq sc + LmciqrcΨd sc = L sc idsp+ Lmcidrc(59)vq sc = R sc iq sc +dΨq sc dt+ ωcΨd sc (60)vqrc=...
... voltages vrGa and vrGb, the IM rotor speed ωmM and itsestimationˆωmM, the estimated IM load torqueˆτML, and the estimated IM speed, given by132 Electric Machines and Drives 52.6 52.65 ... 1999.144 Electric Machines and Drives equation¯σq= LsqLrq− L2mq,¯σd= LsdLrd− L2md, p is the poles pairs and n is the relationshipbetween the number of turns for auxiliary and ... Lmcdid sc dt−ωrLmciq sc 0qr= Rridr+(Lridr+ Lmpidsp− Lmcid sc )s +(Lriqr+ Lmpiqsp− Lmciq sc )ωr0qr= Rridr+dΨdrdt+ ωrΨqr(67)The electrical...
... in electric drives. The excellent characteristics of PSO may be successfully used to optimize the performance of electric machines andelectricdrives in many aspects. It is estimated that, electric ... 2009. IECON ’09. 35th AnnualConference of IEEE, pp. 1003 –1008.160 Electric Machines and Drives Electric Machines andDrives 168 Areall possible operatingconditions optimizedvarying ... 3. Motor parameter identified in simulation.154 Electric Machines and Drives Swarm Intelligence Based Controller for Electric Machines and Hybrid Electric Vehicles Applications 163 rMLlMLmqLlr+-(1/k)ωrλdr+-VqsrriqsiqrRqf...
... Electric Machines and Hybrid Electric Vehicles Applications 191 (a) The power sharing between FC andSC on NEDC driving cycle (b) The power sharing between FC and ... the optimal power sharing based PSO and the comparative study for the FC /SC powertrain are summarized in Fig.21 [Hegazy et. al 2010]. Electric Machines andDrives 192 (c) The Comparative ... respect to pure fuel cell without SC Fig. 21. The results of the optimal power Control for FC /SC Swarm Intelligence Based Controller for Electric Machines and Hybrid Electric Vehicles Applications...
... function of stator flux and currents is given by: Electric Machines andDrives 218 the speed signal. Since there is no need for speed and position signals, a DTC scheme appears to be a ... 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 andDrives 226 voltage vector and then will be synthesized by a PWM technique (Jabbar...
... rights reserved Comparison of Classical and Clozapine Treatment on Schizophrenia Using Positive and Negative Syndrome Scale of Schizophrenia (PANSS) and SPECT Imaging Research paper Received: ... frontal and cerebellum have no significant correlation with PANSS scores. Int. J. Med. Sci. 2005 2 86Figure 2: SPECT by 99mTc-ECD in a 39 year-old drug naïve schizophrenia, pre (up) and post ... times the day before the scans with PANSS, a 33-item scale with 1 to 7 points (normal to extremely abnormal) for each item and sub-scores for 7 positive, 7 negative, and 16 global psychopathological...
... describe an implementation of this protocol in software, and discuss applicationswe have built with it.We consider interconnection with the telephone network, and focus on the problem ofdiscovery ... servicediscovery problem. After reviewing existing protocols for resource discovery (and finding themlacking for wide area applications), we present a scalable protocol for wide area service discovery,which ... that carries voice and video between two points on an IP network. Thetransport system is responsible for handling packet loss, packet jitter, and delay. On theInternet, voice and video transport...
... content.Science of Logic,p.; Wissenschaft der Logik, ,p.; HeW, ,p..Science of Logic,p.; Wissenschaft der Logik, ,p.; HeW, ,p..The Science of Logic sense of mind and ... howhis old friend (and later opponent), Schelling, was to construe Hegel forposterity.Science of Logic,p.; Wissenschaft der Logik, ,p..Science of Logic,p.; Wissenschaft der Logik, ... alskritische Theorie der Bedeutung (Paderborn: Ferdinand Sch¨onigh, ).Hegel, Science of Logic,p.; Wissenschaft der Logik, ,p.; HeW, ,p.. Hegel’s analysis of mind and...
... comic.”Schelling’sKierkegaard’s Journals (trans., selected, and with an introduction by Alexander Dru) (New York:Harper and Row, ), Remark .InConcluding Unscientific Postscript, he ... itsphenomena, and would accrue precisely to the most perfect of them,” ibid., ,p.;§.Schopenhauer and Kierkegaard abandoned Kantian moral and political hopes altogether. Schopenhauer,ahead ... ofFries and his school.Schopenhauer’s own life overlapped that of the post-Napoleonic gen-eration: he was born in , and he died in . Because his fatherwas a wealthy businessman, Schopenhauer...
... curingdiseases, and solving global and environmental prob-lems. Scientists also seek to use, predict, and controlnature—to use sunlight and water for electrical powergeneration, to forecast the weather and ... willbriefly describe the nature of scientific knowledge and how beliefs and controversies play a part.FactsScientific knowledge is dependent and inseparable fromfacts. The principles of the scientific ... and tries to make it work again, so the scientist looks at nature and tries to understand it. The curiosityCHAPTERHistory and Nature of ScienceIN THIS chapter, you will read about what drives...