Informatics Publishing Limited

R. Anandaraj ¹, G. Giftson Samuel ², Venkatesh Kumar

Affiliations
1 E.G.S. Pillay Engineering College, Nagapattinam, IN
2 Department of Electrical and Electronics Engineering, E.G.S. Pillay Engineering College, Nagapattinam, IN

Abstract

In this paper, Dc-Dc converters are proposed for low-voltage and low-power applications. A generalized converter is configured such that the boost-half-bridge (BHB) cells and voltage doublers are connected in parallel or in series to decrease the output voltage and/or the output power. In addition to reduced device voltage and current ratings by the connection, the proposed converter has the following features: high-step-up voltage gain with significantly reduced transformer turn ratio, high input current ripple due to interleaving effect, zero-voltage switching turn-ON of switches and zero-current switching turn-OFF of diodes, no additional clamping and start-up circuits required, high component availability and easy thermal distribution due to the use of multiple small components, and flexibility in device selection resulting in optimized design. A design guideline of determining the optimum circuit configuration for given output voltage and power level is presented.

Keywords

Active Clamping, Boost-Half-Bridge (BHB), High Step-Up, Multiphase, Soft-Switched.

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G. Ganesan ¹, N. P. Subramanianan ², V. Mohan ¹, R. Anandaraj ¹

Affiliations
1 E.G.S.Pillay Engg. College, Nagapattinam, IN
2 Pondicherry Engineering College, Puducherry, IN

Abstract

This paper presents a parameter estimation of Wind Energy Conversion System (WECS) with turbine gearbox, which is an important mechanical component of wind turbine and the function is to pass the power which is generated by the wind wheel in the wind to the generator. The speed of wind wheel is usually very low, well short of the required generator speed, for this reason, its function must rely on the speed-raising effect by wind turbine, thus, it will also be called speed increasing gearbox. It is also one of the most important and most expensive components of wind turbine. Once installed, it is difficult to repair. Therefore, it needs effective experiments during its design and production to meet the strict quality requirements. The test platform adopts closure design, which enables it to experiment two gearbox products at the same time. The running condition and operating parameters in real time is proposed and executed through Programmable Logic Circuit (PLC) and SCADA technique. An estimated efficiency of 80% is constantly maintained by this scheme. It can also intelligently control each system of the entire test platform, which including lubrication system, loading system, frequency converter, motor and other equipment.

Keywords

Wind Energy Conversion System (WECS), Condition Monitoring Systems (CMS), Programmable Logic Circuit (PLC), Supervisory Control and Data Acquisition (SCADA).

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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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