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The paper presents a model of an electric vehicle with a thin flexible photovoltaic cell installed on the roof. The vehicle's model consists of the following sub-models: a set of batteries (LiFePO4), an electric machine, converters, resistance to motion and the gearbox model. Based on the analysis of an equivalent schematic for a photovoltaic cell, equations have been derived which account for the...
This paper presents a battery charging system that uses a photovoltaic panel and determines the charging current at different levels of solar illumination. In the analysis of photovoltaic cells, one must bear in mind that the light reaches the cell in various amounts, the cell is exposed to significant temperature variations during its operation, the solar panels differ in size and, of course, various...
Cell phones and other portable electronic video and music players are irresistible devices in our lives. Bigger screens and complex processes of these devices require high power demand which can cause battery charge problem in over use. Nowadays, smart phones and other portable electronic devices are more widely adjustable to charge via usb port. In this paper, portable device charge system is proposed...
As distributed power sources seem to become increasingly popular in the near future, power electronics should be able to provide significant advantages in processing power from renewable energy sources using fast response and autonomous control. Fuel cells, photovoltaic devices and storage batteries sources produce a significant power in hybrid power structure. In this paper, the uninterruptible power...
This paper presents the practical and theoretical design of the power supply unit (PSU) of the Sathyabama University Nano Satellite. The solar arrays are configured such that the cells of each side on the satellite are connected in series and the four sides are connected in parallel. This configuration has been chosen, because it was found that it is the best trade off between ease of maximum power...
An embedded systems like e-Book where it consumes less power and employs greatly in outdoor environment, solar energy can be introduced for extending the reading time. In this paper, to design e-book system with photovoltaic solar cell application, solar harvesting module must be considered. But measurement showed that charging current for battery is significantly affected by solar cell type and the...
This paper describes a method of Maximum Power Point Tracking(MPPT) with MCU controlling system in grid-connected photovoltaic generation system, especially introduces the techniques and principles of DC-DC conversion. The MPPT is implemented with a Buck-Boost DC-DC converted circuit topology. The system is simple with good response speed, and the controlling method is flexible with software and hardware...
Photovoltaic generators exhibit nonlinear I-V characteristics that vary with solar insolation. This paper describes a technique for real time tracking of the maximum power point (MPPT) of a solar panel charging a battery. A step down switching regulator is used where the duty cycle is varied to attain the desired MPPT level. Performance of the MPPT is evaluated theoretically using ORCAD SPICE. A prototype...
A framework for modeling the power generation of laterally-contacted n-type / intrinsic / p-type / intrinsic (nipi) diodes coupled with an alpha-particle radioisotope source is developed. The framework consists of two main parts, the alpha-particle energy deposition profile (ADEP) and a lumped parameter equivalent circuit model describing the nipi device operation. Experimental measurements are used...
The quality of load matching in a photovoltaic system determines the quality of system performance and the degree of the solar cells utilization. In a matched system, the operation of the load-line is close to the maximum power-line of the solar cell (SC) generator. Some load-lines inherently exhibit a relatively good matching when they are directly connected to the SC generator; for others, the matching...
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