iosr-JEEE   Volume-9 ~ Issue-5 ~ Sep-Oct 2014

Abstract: The method of induction motor drives fed by converters are essentially accompanied by high-frequency interferences which are caused mainly by freeloading currents of the common and differential modes. The discharged current propagates through the transmission cable and signal cables with understanding the problem of overvoltage in inverter fed induction motor with long supply cables . Considering classical transmission line analysis, and traveling-wave analysis with zero initial charges on cables, these transient over voltages are about twice the dc link voltage with a short rise time of about 200 ns. Nevertheless for long cables, these transient overvoltages may reach 3 or 4 p.u. Hence some of the improvement methods need to be implemented for long cable which are fed to the adjustable speed drives with PWM technique due to the transients. Due to the high frequency interference there are many problems will accurs at the different stages This paper proposes that the transient overvoltages on ac induction motors when connected through a cable of arbitrary length to IGBT-PWM inverters. Modeling of the Induction motor and the when the high frequency is applied and also it needs to calculate the overvoltage in the inverter fed induction motors through the long cabels. The cable characteristics and performance of the induction motor can be implemented using the MATLAB / Simulink which is convenient to analyze the proposed method.

Kew words: Inverter fed Induction motor drives, cabel length, voltage reflection, gauge of the cable.Narrow PWM pulse.

[1] Persson E. 1992. Transient Effects in Application of PWM Inverters to Induction Motors. IEEE Transactions on IA. 28(5): 1095-1101.

[2]. Basavaraja, B. and Sarma, D.V.S.S. (2006) "Application problem of PWM AC drives due to long cable length and high dv/dt", Vol.06,pp. 1-6.

[3]. Demmig, S. Andrews, J. and Klug, R.-D. (2011) "Control of subsea motors on multi-km cable lengths by variable frequency drives", Petroleum and Chemical Industry Conference Europe Conference Proceedings (PCIC EUROPE), Rome, Italy, pp. 1-10.

[4] H. Bonnett. 1996. Analysis of the impact of pulsewidth modulated inverter voltage waveforms on AC induction motors. IEEE Trans. Ind. Applicant. 32: 386-392, Mar/Apr.

[5] A.F. Morira, T. A.Lipo, G. Venkataramanan and S.Bernet. 2001. High Frequency Modelling for Cable and Induction Motor Over-voltage Studies in Long Cable Drives. IEEE Industrial Applications Society36th Annual Meeting Chicago, Illinois, USA, September 30-October 5.

Abstract: Model predictive current control of a five-level cascaded H-bridge (CHB) inverter with different sampling times is presented in this paper. The purpose of the current controller is to regulate the load current within the set reference current. A simulation model of the five-level CHB inverter with Model Predictive current controller (MPC) has been built to demonstrate the CHB inverter system performance in terms of Total Harmonic Distortion (THD) level of the load current and reference current tracking for a step change with different sampling times. The simulation results are observed by using the MATLAB Simulink software to validate the proposed current control technique.

Key Words: Cascaded H-bridge (CHB) multilevel inverter, Model Predictive Current Controller, Total Harmonic Distortion (THD).

[1] J. Lai, and F. Peng, ―Multilevel Converters – A New Breed of Power Converters‖. IEEE Trans. Ind. Appl., Vol. 32, No. 3, May/June, 1996.
[2] C. Hochgraf, R. Lasseter, D. Divan, and T. A. Lipo, ―Comparison of multilevel inverters for static var compensation,‖ Proc. IEEE Ind.Applicat. Soc. Annu. Meeting, 1994, pp. 921–928.
[3] L. Tolbert, F. Z. Peng, and T. Habetler, ―Multilevel converters for large electric drives,‖ IEEE Trans. Ind. Electron., vol. 35, no. 1, pp. 36–44,Jan./Feb. 1999.
[4] H. Rudnick, J. Dixon, and L. Moran, ―Delivering clean and pure power,‖ IEEE Power Energy Mag., vol. 1, no. 5, pp. 32–40, Sep./Oct. 2003.
[5] J. Rodriguez, S. Bernet, B. Wu, J. O. Pontt, and S. Kouro, ―Multilevel voltage-source-converter topologies for industrial medium-voltage drives,‖ IEEE Trans. Ind. Electron., vol. 54, no. 6, pp. 2930–2945,Dec.2007.

Abstract: This paper presents an optically controlled coupled microstripline microwave powerattenuator on a high resistivity silicon substrate in the 3GHz-7GHz frequency band. The structure is based on the10dB microstrip directional coupler. Attenuation control is performed by optical control of the open end resistances. The open end act as a variable resistance under sufficient optical illumination conditions. The attenuator has been designed for 10dB and 25dB attenuation control for one-port and two port optical illuminations respectively. The analysis has been carried out for one port illumination using a 30mW, 850nm laser diode and two ports illumination using two 20mW, 650nm laser diode. The attenuator has been modeled by the Computer Simulation Technique's Micro Wave Studio (CST MWS) 3D EM simulator. At 5GHz, the structure provides a continuous variation of S41 between 0 and 25dB with both open end illumination.

Keywords: Attenuator, Coupled Lines, CST MWS, Directional Coupler, Optical Control

[1] Herczfeld, P.R., Daryoush, A.S., Contarino, V.M., Rosen, A., Turski, Z., and Khana, A.P.S.: 'Optically controlled microwave devices and circuits.' IEEE MTT-S Int. Microw. Symp. Dig., 1985, pp. 211–214
[2] Platte, W.: 'Periodic-structure photoexcitation of a silicon coplanar wave guide for selective optoelectronic microwave control', IEEE Trans. Microw. Theory Tech., 1990, 38, (5), pp. 638–646
[3] Cheung, P., Neikirl, D., and Itoh, T.: 'Optically controlled coplanar waveguide phase-shifter', IEEE Trans. Microw. Theory Tech., 1990, 38, pp. 586–594
[4] Safwat, A., Khalil, D., Elhennawy, H., and Ragaie, H.: 'Quasi-static analysis of an optically illuminated directional coupler', IEEE Trans. Microw. Theory Tech., 1997, 45, pp. 1351–1357

Abstract: This paper presents a design method of inducing a linear generator in a form of a Cycloid Pendulum, this method solves the problem of the distribution of magnetic field lines in the armature coils and the induction generator, observe the shape of the magnetic field created by the coil, measure the dependencies of field with the position along its axis and the current density injected, and that by the Finite Element and is used the Computer-Aided Design (CAD), and more particularly the Comsol Multiphysics software to get the results that good operation of the generator.

Keywords: «CAD», «Comsol Multiphysics», «Finite Elements», «Linear Generator», «Magnetic Vector Potential», «Sizing of Coils»

[1] H. Allag, M. E. H. Latreche, M. R. Mekideche and N. Ikhlef. Axial Magnetic Forces Comparison in Linear and Nonlinear Model of
Ferromagnetic Core of Magnetic Actuators, Medwell Journals, 2007 (P :1199-1202)
[2] R. Blanchet, F. Gaume et A. Bondeau. Distribution Optimale du Courant dans une Bobine sans Fer pour Mesurer de Susceptibilité
Magnétique, Revue de Physique Appliquée Mars, 1973 (83)

Abstract: A noninvasive method based blood glucose predicting device with medically acceptable readings could transform the diabetic management protocols. Noninvasive blood glucose monitoring devices will increase patient compliances along with reduction of medical burden and its related expenses. Here, we had utilized the indigenously developed amplitude modulated ultrasound and infrared technique based noninvasive glucometer for this purpose. A lab based study had been performed to measure the performance of the modulated ultrasound and infrared technique based noninvasive glucometer. A total of 02 subjects (01 healthy normal subject and 01 diabetic subject) were engaged in this study.

[1]. International Diabetes Federation, "IDF Diabetes Atlas," 6th edn. Brussels, Belgium: International diabetes Federation (2013). http://www.idf.org/diabetesatlas. (12/08/2014).
[2]. G. Danaei, M. M. Finucane, Y. Lu, G. M. Singh, M. J.Cowan, C. J. Paciorek, J. K. Lin, F. Farzadfar, Y. H.Khang, G. A. Stevens, M. Rao, M. K. Ali, L. M. Riley,C. A. Robinson, and M. Ezzati, "National, regional, and global trends in fasting plasma glucose and diabetes prevalence since 1980: systematic analysis of health examination surveys and epidemiological studies with 370 country-years and 2·7 million participants‟, Lancet 378, 31 (2011).
[3]. S. Wild, G. Roglic, A. Green, R. Sicree, and H. King, "Global Prevalence of Diabetes. Estimates for 2000 and projections for 2030." Diabetes Care, vol.27, 2003, pp 1047–1053
[4]. Peter J.Watkins, ABC of Diabetes, (Fifth Edition), London: BMJ Books, 2003.
[5]. http://diabetes.webmd.com/ (13/08/2014)

Abstract: The most important concern in the medical domain is to consider the interpretation of data and perform accurate diagnosis.The bronchitis, pneumonia and many other pulmonary diseases causes respiratory disorders which affects respiratory systems. Diagnosis of these diseases is facilitated by pulmonary auscultation by using stethoscope. This method depends on individuals hearing capability, experience and ability to differentiate the sounds. The quantitative measurement and permanent record of the related parameters is difficult. The recording and analysis of the respiratory sounds may quantify the changes in abnormal respiratory sounds in respiratory disorder. The signal processing techniques may be used for diagnostic information.

Keywords: bronchitis, pneumonia, pulmonary auscultation, respiratory sound, respiratory disorder etc

[1] A.R.A. Sovijarvi, J. Vanderschoot, J. E. Earis, "Standardization of Computerized Respiratory Sound Analysis", Eur Repair Rev, vol. 10 (77), pp. 58, 2000 [2] J.E. Earis, B.M.G. Cheetham, "Current Methods used for Computerized Respiratory Sound Analysis".Eur Repair Rev, vol 10 (77), pp. 585-590, 2000 [3] Zahra M.K. Moussavi, Respiratory Sound Analysis, IEEE Engineering in Medicine & Biology, 2007. [4] Zahra M.K. Moussavi, Separating heart sound from lungs sounds, IEEE Engineering in Medicine & Biology Magazine, 2007 [5] Zahra M.K. Moussavi,"Fundamentals of Respiratory Sound Analysis", Publication in the Morgan & Claypool Publishers series [6] Ganong W.F., Review of Medical Physiology, Seventeenth Edition, New Jersey, Prentice Hall, 1995

Abstract: In this study, design and simulation of 15GHZ and 10GHZ Low Noise Amplifiers (LNA) have been explored. The simulation has been performed by using the Agilent Advanced Design System (ADS) Software. Tuning and optimization tools of ADS software have been used to optimize results. The minimum Noise Figure (NFmin) of the High Electron Mobility Transistor (HEMT) device in our simulation, is lower than previous works. We have designed a 15GHZ LNA based on three design methods basing on the lumped, the distributed and the radial stub elements. The scattering parameters of 15GHZ designed amplifier in the following manner, input return loss (S11), output return loss (S22), forward gain (S21), and isolation (S12) are -17.15dB, -16.92dB and 14.35dB as follow as -17.023 dB, respectively.

[1] L. Chen, J. Gou and J. Hua Lu, Design of a 20 MHz-3 GHz Broad band Low Noise Amplifier, Computational Intelligence and Software Engineering (CISE), 2009 International Conference on , 2009, 1-4.
[2] C. Kumar and N. Gupta, Design of Front End Low Noise Amplifier for Wireless Devices, Engineering and Systems (SCES), 2012 Students Conference on, 2012, 1-4.
[3] Yu. Na Su and G. Li, Design of a Low Noise Amplifier of RF Communication Receiver for Mine, Electrical & Electronics Engineering (EEESYM), 2012 IEEE Symposium on, 2012, 125-127.
[4] Avago Technologies, Low Noise High Freq PHEMT, ATF-36077 Data Sheet, April 29, 2008.
[5] G. Gonzalez, Microwave Transistor Amplifiers: Analysis and Design (2nd Edition, Prentice Hall, 1997).
[6] D. M. Pozar, Microwave Engineering (2nd Edition, Wiley and Sons, New York, 1998).

Abstract: Pulse Electromagnetic therapy is usually referred by doctors for clinical management of quick bone healing, repair of damaged tissues and as a quick remedy for pain. Various PEMT equipment are already available in market, but none of them are available as low cost consumer electronic device. Authors tried to develop a low cost version of micro controller controlled PEMT device. The design and construction method of this PEMT device has been thoroughly discussed in this paper. The prototype constructed not only met the low cost criteria but also was equally effective at pain management and bone healing.

[1]. William Pawluk, "Pulsed Electromagnetic Fields: How They Heal", http://www.doctoroz.com/videos/pulsed-electromagnetic-fields-how-they-heal
[2]. Bassett CA, Schink-Ascani M, Lewis SM. (September 1989). "Effects of Pulsed Electromagnetic Fields on Steinberg Ratings of Femoral Head Osteonecrosis", Clin Orthop Relat Res. 1989 Sep;(246):172-85
[3]. Markov, Marko S (2007). "Expanding Use of Pulsed Electromagnetic Field Therapies". Electromagnetic Biology & Medicine 26 (3): 257–274. doi:10.1080/15368370701580806
[4]. PRJVC Boopalan, Samuel B. Chittaranjan, Ramadass Balamurugan, N.S. Nandakumar, A. Sabareeswaran and Mira Mohanty, "Pulsed electromagnetic field (PEMF) treatment for fracture healing". Current Orthopaedic Practice 01/2009; 20. DOI: 10.1097/BCO.0b013e318198e8b2
[5]. Mark Sircus,"Pulsed Electromagnetic Field, Therapy for Cancer and Pain", December 28, 2012 | Filed under Cancer, Medicine, http://drsircus.com/medicine/cancer/pulsed-electromagnetic-field-therapy-cancer-pain

Abstract: The design and simulation of smart home control in tropical climate deals with the thermal simulation of a residential building which is located in the Indian capital city of New Delhi [N 28034'] [E 770 11']. It gives an idea of the amount of energy consumed and wasted throughout the year based on 3 input considerations i.e., the building materials, the weather data and the zone loads. The building uses electricity for to run its space heating system, lighting and appliances and to heat domestic hot water. The thermal simulations have been done using the software Energy Plus and Open Studio plug-in which will give the amount of generates, consumed and purchased energy with time step, monthly and yearly values. In order to save some amount of the electrical energy supplied by the utility grid to the house mains, we are installing solar photovoltaic panels on the roof of the house. It also takes in to account the day lighting results according to its geographical conditions. The next phase of the project deals with efficient lighting inside the house in order to save the energy used in interior lighting. The effects of lighting inside the house will be shown using RELUX. The last part of the report deals with solar panel design.

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