speed control of induction motor using pwm technique pdf
POWER ELECTRONIC CONTROL OF INDUCTION MOTORS ppt
... speed operation is the requiredrms value of the fundamental harmonic of the output phase to neutral voltage of the AC-ACvoltage controller. Induction machineFig. 6.5: Speed control of an induction ... with this type of load in practice. Speed control by stator voltage variation is realised by using AC-AC voltage controllerin each stator phase of the machine. Voltage controller is of the same ... prevailing one in closed-loop control of induction motors fed from PWM inverters. Explanation of this method however requires at first the introduction of the notion of the space vector.Let us...
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Báo cáo lâm nghiệp: "Detection of cavitation events upon freezing and of water in stems using ultrasound technique" pdf
... Structureand the Ascent of Sap. Springer-Verlag, Berlin,pp. 143 Detection of cavitation events upon freezing and thawing of water in stems using ultrasound techniquesA. Raschi1and ... rising of thetemperature.Materials and MethodsThe experiment was carried out in the laborato-ry of the Agronomy Department of the Universi-ty of Firenze, Italy, using ... placeupon the freezing and the thawing of water in vessels. In fact, the existence of cavitative events as a consequence of cycles of freezing and thawing has beenevidenced...
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Báo cáo khoa học: "Biological Control of Sheep Parasites using Duddingtonia" pdf
... ã Control group: The same number and breed of ewes and number of lambs of the ewes inthe Fungus group was allocated to an area of comparable size, topography and pasturequality for each of ... BL, Rydzik A,Yeates GW: Evaluation of biological control of sheep parasites using Duddingtonia flagrans un-der commercial farming conditions on the island of Gotland, Sweden. Vet. Parasitol. ... also be a reflection of goodnutrition during the lamb-finishing period. Biological control is one of the more promisingnon-chemotherapeutic approaches to parasite control of livestock (which...
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Tài liệu Vibration of Airplane Wing Using Pro/M pdf
... 1ME-430 INTRODUCTION TO COMPUTER AIDED DESIGN Vibration of Airplane Wing Using Pro/M Dr. Herli Surjanhata Use Notepad or Text Editor in Unix system to create...
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Báo cáo khoa học: "Ecological Evaluation of Persuasive Messages Using Google AdWords" pdf
... performance of each singlead (its persuasiveness, from our point of view):ã CTR, Click Through Rate: measures the num-ber of clicks divided by the number of impres-sions (i.e. the number of times ... scenario and some pilot studies to testthe feasibility of our approach.2 Advantages of Ecological ApproachesEvaluation of the effectiveness of persuasive sys-tems is very expensive and time consuming, ... description of the experimentalsetup). It was meant to test broadly how affectivevariations in the body of the ads performed. The twovariations contained a fragment of a commentary of the museum...
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Báo cáo khoa học: "Representing a System of Lexical Types Using Default Unification" pdf
... of sub- ject control of transitive subject -control verbs. In section 2, a brief description of the use of de- faults and YADU is given. In section 3, we present the results of representing ... Number 13. 264 Proceedings of EACL '99 Representing a System of Lexical Types Using Default Unification Aline Villavicencio Computer Laboratory University of Cambridge New Museums Site ... adequacy of different default unification oPera- tions, like the one used in DATR, for this kind of linguistic description. This work is part of a larger project concerned with the investigation of...
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Báo cáo hóa học: "Inhibiting adenoid cystic carcinoma cells growth and metastasis by blocking the expression of ADAM 10 using RNA interference" pdf
... (d) Quantification of immunohistochemical staining of ADAM 10 from b using Image Pro Plus software (*p < 0.001 compared with SACC-LM). SACC-LM (high metastatic potential control) ; SACC-mock ... www.biomedcentral.com/submitXu et al. Journal of Translational Medicine 2010, 8:136http://www.translational-medicine.com/content/8/1/136Page 10 of 10 Figure 2 Detection of the meta static potential of SACC-LM and SACC-83 ... proliferation, supportingtheroleofADAM10incellgrowthinSACC-LMcells(Figure 5 C). In addition, the affect of gene silencing of ADAM 10 on the cell migration ability of SACC-LMcells was also investigated...
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Báo cáo hóa học: " Research Article Recognition of Planar Objects Using Multiresolution Analysis" pdf
... η(t)andηi(t)oflength27are the in-variants of the unknown and reference objects, respectively.The maximum of the correlations identifies the unknownobject.The recognition performance of the affine-invariantfunction ... exactly represented by a sum of weightedand shifted scaling functions is shown to be tied to the num-ber of zero moments of wavelet filters as well [14]: all mo-ments of the wavelet (high-pass) ... the affine-invariant η(t)isafunction of the amount of noise on the boundary curve of the objectas well. Thus, a final experiment is made, where the realiza-tions of noise are produced in such a way...
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Báo cáo y học: "Association of chemokine receptor gene (CCR2CCR5) haplotypes with acquisition and control of HIV-1 infection in Zambians" pdf
... modes of transmission[11,17,28,29]. Further confirmation of the effect of HHEhighlights its potential impact on clinical HIV-1 disease control in diverse populations, in contrast to that of theprotective ... 3). Because this pattern of associationcould be explained by combinations of haplotypes car-ried, we explored the effect of diplotypes further.Among all diplotypes of frequency > 0.05, HHD/HHEshowed ... comparison.As for the influence of CCR2-CCR5 alleles or haplo-types on transmission and acquisition of infection, thehighly significant deviation of the distribution of haplo-types from HWE among...
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Design and Implementation of a Three-Phase Induction Motor Control Scheme
... a control strategy that varies the frequency and voltage of the signal applied to the windings of the induction motor, while controlling the flux created in the air-gap of the induction motor. ... outputs of an induction motor, we can use this motor controller to control an induction machine. ã TMS320F243 DSP controller. This is manufactured by the Texas Instruments Company and is one of ... the induction motor s many advantages are clearly explained. Wildi also presents the two types of induction motors: “the squirrel cage induction motor and the “wound motor . An explanation of...
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DC bus control of variable speed wind turbine using a buck boost converter
... Search rules of the various cases of operation are summarized in the table I. Fig.4. Operation modes of buck boost converter 2Unlike constant -speed control, a variable -speed control can ... Fig.5. Probable displacement of the operating point between the operating power and the maximum power, in the event of change of the wind speed, the control of the buck-boost converter ... control can adjust the speed of the turbine as the wind speed changes, so as to operate at the peak of the Cp curve. This will maximize the power generated for a particular wind speed, as it shown...
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