Informatics Publishing Limited

P. J. Suresh Babu ¹, K. Krishnaram ¹, K. Nandakumar ¹, G. Chitrakala ¹

Affiliations
1 EGSPEC, IN

Abstract

This work describes PWM modulation using harmonic elimination technique necessitates the solution of system of non – linear transcendental equation set representing the relation between the amplitude of fundamental wave and each order harmonic and the sinusoidal angle. Conventionally due to their higher complexity , these equations have to be schedule offline and the calculated optional switching angles are stored in look – up tables on interpolated by simple function for real time operation .The above technique involves the solution of Newton – iteration method is usually applied to solve the equation set but the convergence depend on the selection of initial value .All the above traditional selective harmonic techniques ,the lowest uneliminated harmonic and the total harmonic distortion factor are obviously enlarged largely which would do greater harm to the power system. The above limitation can be avoided by introducing GA approach with microcontroller implementation. Besides this, this work also improves the input power factor by providing three bidirectional switches are also reviewed.

Keywords

Selective Harmonic Elimination, Switching Angle, Genetic Algorithm, THD, Switching Frequency.

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T. Suresh Padmanabhan ¹, T. Balamurugan ¹, P. J. Suresh Babu ²

Affiliations
1 Bharathiyar College of Engineering and Technology, Karaikal, U.T. of Pudhucherry, IN
2 E.G.S Pillay Engineering College, Nagapattinam, IN

Abstract

Recently due to the rapid advancements in wireless communication and information technologies it is now possible to embed various levels of smartness in the modern home. Wireless networks and sensors are seen to play an increasingly important role as key enablers in emerging pervasive computing technologies that are required for the realization of smart homes. A top level architecture of a smart home is illustrated in this paper. It includes a server/gateway/router that can be used as the central point of connectivity for devices within the home as well as allowing connectivity to the outside world. The setup also includes smart sensors as well as appliances that have either wired or wireless connectivity. This paper reviews some of the major wireless communication technologies that can be used to realize a smart home. A prototype system is designed and implemented to enable an authorized user to monitor and control home devices equipped with a smart interface structure using a mobile phone and also using pc. It enables monitoring and control of various devices with multiple levels of settings is described and the results achieved are presented.

Keywords

Bluetooth, GSM, RFID, Zigbee.

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S. Veeramanikandan ¹, K. Krishnaram ², P. J. Suresh Babu ², G. Giftson Samuel ², R. Anandaraj ²

Affiliations
1 NPTI, IN
2 EGSPEC, IN

Abstract

Recent developments in permanent magnet materials, power electronics and modern control technologies have significantly influenced the wide-spread use of BLDC motor drives. Brushless dc motors are now, widely used in many applications such as servo drives, computer peripheral equipments and electric vehicles due to their high power density, high efficiency, compact size and easier control. Due to absence of commutator and brushes, BLDC motors have several advantages compared to conventional DC motor. The design of current and speed controllers for permanent magnet brushless DC (PMBLDC) motor drive remains to large extent a mystery in the motor drives field. Since speed is one of the most important parameter in industries for various applications, it is proposed to carry out the different speed control techniques using various conventional and non-conventional methods (Artificial Intelligence) in BLDC motor under different operating conditions in MATLAB\SIMULINK and Real time Hardware implementation using DSP controller. The validity of the proposed work is to be verified through both simulation and experimental set-up.

Keywords

BLDC, Permanent Magnet Motors, Speed Controller, ANN, DSP.

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