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Ramu, G.
- Performance Analysis of Boost Fed Dc Drive under Load Uncertainties
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Authors
Affiliations
1 Gandhi Institute of Technology and Management University, Gandhi Nagar, Rushikonda, Visakhapatnam-530 045, Andhra Pradesh, IN
1 Gandhi Institute of Technology and Management University, Gandhi Nagar, Rushikonda, Visakhapatnam-530 045, Andhra Pradesh, IN
Source
Indian Journal of Science and Technology, Vol 9, No 45 (2016), Pagination:Abstract
Objectives: To design a new converter topology based on boost converter to obtain essential control characteristics of a DC drive. Methods/Statistical analysis: The developments in power electronics based industry/technology and development in new converter design strategies, the speed of DC motor can be maintained at required level by maintaining the voltage across armature. The closed loop control scheme with proportional plus integral (PI) controller takes speed reference and the actual speed of DC motor as input parameters and generates the pulses to control the boost converter output voltage. Findings: With this, the speed of DC motor can be maintained at the required speed. The effectiveness of closed loop control scheme with PI controller is compared with that of open loop control scheme. The analysis presented in this paper is mainly concentrated to obtain the suitable operational changes pertaining to various input and output parameters such as output voltage, input and output currents, speed, torque and output powers are analyzed for different load uncertainties. The complete design procedure of converter, analysis of load uncertainties is presented with supporting graphical and as well as numerical results. Application/Improvements: This converter design procedure can be applicable to control the speed of DC motor as per the application. With this procedure, the ripple factor and the converter losses can be decreased which results in improvement of converter efficiency.Keywords
Boost Fed DC Drive, Closed Loop Operation, Converter Design, Converter Losses, Load Uncertainties.Full Text
- Design and Operating Parameters on the Performance of Planar and Ducted Air Breathing PEM Fuel Cell
Abstract Views :155 |
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Authors
Affiliations
1 Department of Electrical and Electronics Engineering, Bharath University, Chennai - 600073, Tamil Nadu, IN
1 Department of Electrical and Electronics Engineering, Bharath University, Chennai - 600073, Tamil Nadu, IN
Source
Indian Journal of Science and Technology, Vol 8, No 31 (2015), Pagination:Abstract
Water management is a burning issue in Air Breathing Fuel Cells (ABFC). Flooding and dehydration are the two main degradation mechanisms that occur when water management is not adequate. In this paper, experimental studies on air breathing fuel cell with ducted and planar design on cathode side were studied, including experiments with three different ratios of cathode open area with each design, varying the channel dimensions in the ducted design and varying the current collecting and the open area in the planar design. In ducted design the mass transfer limitations and flooding can be reduced with wider channels, where as in planar design larger opening area reduce the mass transfer limitations however wide channels require a rigid gas diffusion backing with current collecting ducts. The effect of varying hydrogen flow rate, various cell orientations, various ambient temperatures of both ducted and planar designs were compared.Keywords
Air Breathing Fuel Cells, Ducted Design, Planar Design, Water Management.Full Text