speed control of induction motor using pwm technique pdf

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Ngày tải lên: 17/12/2013, 14:15

... speed operation is the required rms value of the fundamental harmonic of the output phase to neutral voltage of the AC-AC voltage controller. Induction machine Fig. 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 controller in 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...

Ngày tải lên: 11/07/2014, 05:20

... Structure and the Ascent of Sap. Springer-Verlag, Berlin, pp. 143 Detection of cavitation events upon freezing and thawing of water in stems using ultrasound techniques A. Raschi 1 and ... rising of the temperature. Materials and Methods The experiment was carried out in the laborato- ry of the Agronomy Department of the Universi- ty of Firenze, Italy, using ... place upon 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 been evidenced...

Ngày tải lên: 09/08/2014, 04:20

... ã Control group: The same number and breed of ewes and number of lambs of the ewes in the Fungus group was allocated to an area of comparable size, topography and pasture quality 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 good nutrition during the lamb-finishing period. Biological control is one of the more promising non-chemotherapeutic approaches to parasite control of livestock (which...

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... 1 ME-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...

Ngày tải lên: 19/01/2014, 05:20

... performance of each single ad (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 test the feasibility of our approach. 2 Advantages of Ecological Approaches Evaluation of the effectiveness of persuasive sys- tems is very expensive and time consuming, ... description of the experimental setup). It was meant to test broadly how affective variations in the body of the ads performed. The two variations contained a fragment of a commentary of the museum...

Ngày tải lên: 07/03/2014, 18:20

... 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...

Ngày tải lên: 17/03/2014, 23:20

... (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/submit Xu et al. Journal of Translational Medicine 2010, 8:136 http://www.translational-medicine.com/content/8/1/136 Page 10 of 10 Figure 2 Detection of the meta static potential of SACC-LM and SACC-83 ... proliferation, supporting theroleofADAM10incellgrowthinSACC-LMcells (Figure 5 C). In addition, the affect of gene silencing of ADAM 10 on the cell migration ability of SACC-LM cells was also investigated...

Ngày tải lên: 18/06/2014, 16:20

... η(t)andη i (t)oflength2 7 are the in- variants of the unknown and reference objects, respectively. The maximum of the correlations identifies the unknown object. The recognition performance of the affine-invariant function ... exactly represented by a sum of weighted and 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 object as well. Thus, a final experiment is made, where the realiza- tions of noise are produced in such a way...

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... modes of transmission [11,17,28,29]. Further confirmation of the effect of HHE highlights its potential impact on clinical HIV-1 disease control in diverse populations, in contrast to that of the protective ... 3). Because this pattern of association could be explained by combinations of haplotypes car- ried, we explored the effect of diplotypes further. Among all diplotypes of frequency > 0.05, HHD/HHE showed ... comparison. As for the influence of CCR2-CCR5 alleles or haplo- types on transmission and acquisition of infection, the highly significant deviation of the distribution of haplo- types from HWE among...

Ngày tải lên: 13/08/2014, 01:20

... 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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Ngày tải lên: 17/12/2013, 18:06

... Search rules of the various cases of operation are summarized in the table I. Fi g.4. Operation modes of buck boost converter 2 Unlike 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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