nan Taufik

Simulation of a photovoltaic emulator

This paper will outline the simulation of a photovoltaic emulator. A photovoltaic emulator is a DC-DC converter which has similar electrical characteristics to a photovoltaic panel. A photovoltaic emulator allows PV systems to be analyzed in a controlled environment where using actual photovoltaic panels would produce inconsistent results for the PV system, due to variability in outside temperature and weather conditions.

Development of a photovoltaic panel emulator using Labview

With increasing interest in renewable energies, large amounts of money and effort have been put into research and development for photovoltaic systems. The larger interest in PV systems has increased demand for appropriate equipment to test PV systems and for teaching and training the next generation of workers for the sector. A photovoltaic emulator is a device that satisfies a portion of these needs. A photovoltaic (PV) emulator was created using a programmable DC power supply and a developed GUI using Labview. The photovoltaic emulator provides the same current and voltage characteristics as any desired PV panel under various sets of environmental conditions. A PV emulator allows the remaining system to be analyzed in a controlled environment with control over the inherent variability of outside temperature and weather conditions and allows repeatable conditions to test PV equipment such as inverters and MPPT algorithms. The emulator provides an ideal tool and environment for both teaching and research at the University level without the costly investment of a set of commercial PV emulators. An existing power supply that can be used for a variety of other purposes is controlled via Labview to emulate a photovoltaic panel. The power supply can provide an open circuit voltage of 60V and short circuit current of 9A, such that any panel with parameters within this range may be emulated. Thus an extensive variety of panels may be emulated and the majority of panels from the Sandia database are within the capabilities of the available power supply.

Parallel Operation of Hybrid Loaded Resonant Converter Using Phase-Shift Control

This paper presents a phase shifting method to adjust the combined output voltage of two hybrid loaded resonant converters connected in parallel. The method implements a fixed switching frequency and hence it is particularly useful in applications such as medical instrumentation where audible noise is not desirable. The design and analysis of parallel hybrid resonant converters operating in discontinuous conduction mode using the phase shifting method is described. Computer simulation to prove the feasibility of the phase shifting method in the design example is also provided. Analysis of the characteristics of the output voltage produced by phase shifting control along with the steady state output analysis of the hybrid loaded resonant converters is also discussed

A Miniature 5.5 Amp DC Motor Drive

This paper details the design process and the stages of construction of a 12 V 5.5 A DC motor drive on a very small 1.5 inches by 1.5 inches printed circuit board. The relatively small-size but high power dc motor drive may open door to a wide spectrum of industrial electronic applications. The tiny size was made possible by the latest technology in power electronics for integrated dc motor drive technology and was aimed to improve overall efficiency of the dc motor drive circuit. A laboratory prototype was built and loading tests and measurements were conducted. The results of these tests and measurements are also presented in this paper

Output current ripple factor performance of half-wave rectifier with and without freewheeling diode

The objective of this work is to investigate the ripple factor of half-wave rectifier circuits. The ripple factor is one of the important characteristics necessary when designing a power electronic converter. The ripple factor measures how much deviation the converter output parameter has, such as the output current, from its nominal designed value. In this paper the ripple factor of the output current of half-wave rectifiers is investigated. More specifically, the ripple factor of output current from more practical half-wave rectifiers that include inductive load with or without a freewheeling diode are analyzed and then compared to that of the basic half-wave rectifier consisting only of a resistive load. Derivation of the equations for the ripple factor for the three half-wave rectifier circuits is first presented. From these results, plots are generated using Pspice that will allow us to conveniently compare the ripple factor performance of each of the rectifiers.

Determining the optimum operating parameters of a unipolar PWM inverter using experimental approach

This paper presents a study of determining the optimum operating parameters of a unipolar PWM inverter. Variations on the input voltage level and switching frequency will be investigated to see their impacts on the operation of the inverter and harmonics produced. Results through experimental approach show that careful selections of inverter parameters yield inverters operation with highest efficiency and lowest distortion.

A multidisciplinary design project in energy conversion electromagnetics course

This paper presents a work-in-progress on a new multidisciplinary design project for an Energy Conversion Electromagnetics course at Cal Poly State University. The project is intended to strengthen the skills of electrical and mechanical engineering students by performing design tasks in a multidisciplinary environment. Concurrently, this new design project is implemented to fulfill ABET criterion 3d. The content and format of the project will be described in this paper. Assessments planned for the project will also be discussed.