speed control of single phase induction motor pdf

... 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. ... designed to control a brush-less DC motor. However, by constructing a feedback loop that can detect the outputs of an induction motor, we can use this motor controller to control an induction ... 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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... single- phase induction motor. Figure 9.8-4. Average steady-state torque versus speed characteristics of a capacitor-start single- phase induction motor. UNBALANCED STATOR CONDITIONS OF INDUCTION ... speed exceeds a predetermined value of generally between 3% and 5% of synchronous speed of the rotor. SINGLE- PHASE INDUCTION MACHINES 367 Figure 9.8-5. Free-acceleration characteristics of ... windings of a two- phase induction machine to be out of phase. To accomplish this the impedances of the stator windings are made unequal. For example, the split -phase machine is a two -phase induction...

Ngày tải lên: 16/02/2014, 18:48

... Staff Study Sponsors The Centers for Disease Control and Prevention The Department of Health and Human Services Of ce of Minority Health The Department of Veterans Affairs The National Viral Hepatitis ... Ashbel Smith Professor and Dean Emeritus, University of Texas, School of Public Health, Houston, Texas Harvey J. Alter Chief, Infectious Diseases Sec- tion, Department of Transfusion Medicine, ... Bureau of Infectious Disease Preven- tion, Response, and Services, Massachusetts Department of Health, Jamaica Plain, Mas- sachusetts Alison A. Evans Assistant Professor, Depart- ment of Epidemiology...

Ngày tải lên: 22/03/2014, 17:20

... above. E CONOMICS OF CONTROL OF FERTILIZER RUNOFF Nutrient loss is closely associated with rainfall-runoff events. For phosphorus, which tends to be associated with the solid phase (sediment), runoff losses ... MANAGEMENT AND CONTROL Prediction of water quality impacts of pesticides and related land management practices is an essential element of site-specific control options and for the development of generic approaches ... and application of pesticides for the control of a wide variety of insectivorous and herbaceous pests that would otherwise diminish the quantity and quality of food produce. The use of pesticides...

Ngày tải lên: 29/03/2014, 14:20

... T R2 to a 2 . An example of each type of BC 2 N nanotubes is given in Fig. 1b–f. Symmetry of BC 2 N Nanotubes We first consider the achiral carbon nanotubes with the rotation axis of order n, i.e., zigzag ... symmetries at the C point of the 12 N (N is the number of unit cells in the tube and N = n for ZZ-1 BC 2 N nanotubes) of phonons in ZZ-1 BC 2 N nanotubes and the number of Raman- or IR-active modes, ... divisor of 2n 0 ỵ m 0 and 2m 0 ỵ n 0 ; d is the greatest common divisor of n 0 and m 0 ;S N/d and S N are the screw-axis operations with the orders of N/d and N, respectively. The point group of the...

Ngày tải lên: 22/06/2014, 01:20

... 0.00785 0.7452 0.01235 Real Pressure at 112971m of the end of pipeline is 6970 kPa Table 3.5. Summary of numerical results of oulet pressure p 2 Results of outlet pressure and its differences with ... Real Pressure at 112971m of the end of pipeline is 7730 kPa The results with input data - sample 2 in table 3.1 along the associated gas pipeline of flow equations of Weymouth, Panhandle A, ... Real Pressure at 112971m of the end of pipeline is 7040 kPa The results with input data - sample 3 in table 3.1 along the associated gas pipeline of flow equations of Weymouth, Panhandle A,...

Ngày tải lên: 22/07/2014, 10:21

... eigenvector placement which offers more degrees of freedom. 452 Analysis and Control of Linear Systems 14.2.2.7. Summarization The analysis of the time behavior of a controlled system was done ... eigenvector. Figure 14.6. Shift of a set of poles with minimum dispersion 454 Analysis and Control of Linear Systems detect the dominant modes (good degree of controllability/observability, etc; ... the estimation ˆ z of z is replaced by signal z) of the following system: ⎧ ⎪ ⎪ ⎨ ⎪ ⎪ ⎩ ˙ x = Ax + Bu  y z  =  C U  x +  D 0  u [14.38] 460 Analysis and Control of Linear Systems 14.4.2. Choice of eigenvectors...

Ngày tải lên: 09/08/2014, 06:23

... made in our understanding of the supranuclear control of eyelid function. Moreover, several lines of evidence indicate a strong interaction between the neural control of eyelid and eye move- ments. ... Movements 111 Neural Control of the Eyelid Although the position of the upper eyelid is actively controlled by several muscles, eyelid closure (blink) is itself a passive movement of the eyelid. It occurs ... motoneurons of the LPM lie in the central caudal nucleus (CCN) of the oculomotor nucleus complex in the midbrain. This uniquely unpaired nucleus is located midline between the caudal pole of the oculomotor...

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... course of oral pred- nisone. Six subjects developed gout flares during the 21-day period of observation after injection of PEG-uricase. Discussion Efficacy of PEG-uricase In this first phase I ... region of the chromatogram to calculate the amount (pmol) of 14 C- labeled product formed. The rate of urate oxidation in milliunits per ml of plasma is then calculated (1 unit = 1 àmol of urate oxidized ... http://arthritis-research.com/content/8/1/R12 Page 1 of 10 (page number not for citation purposes) Vol 8 No 1 Research article Control of hyperuricemia in subjects with refractory gout, and induction of antibody against poly(ethylene...

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