principle of the circuit is explained. This paper also deals with MPPT controlled high step up dc-dc converter. The switching element used in the flyback converter is MOSFETs, which is completely on and completely off. This is because MOSFET has high power rating and high switching speed. Moreover, high voltage conversion ratio is achieved. The simulated results are presented with R load. Keywords: Interleaved flyback converter, passive absorption circuit, high voltage gain 1 INTRODUCTION A DC-DC
centers, companies, etc. This software is fastest simulators for power electronics circuit. It is capable of simulate large and complex power converter and control systems in a short time. Further to development on design 4B, the circuit will be modified to improves in ripple waveform of output and improve the feedback circuit to control the output voltage. Furthermore, the converter is adopted based on measurement and comparison between power circuits in simulation time. Table of Content No. Description
reduction, equipment maintenance cost, equipment life extension, and power quality improvement. There are two types of benefits of using controlled switching which divided into technical and economical. The technical benefits of controlled switching are as follows: - Improvement of Power quality. - Reduction of circuit breaker contact burn. - Avoiding occurrence of nuisance relay operations. - Increased life span of power system equipment. - Reducing risk of equipment failures. -
Inversion is the change of dc power to ac power at a desired output voltage or current and frequency. A static semiconductor inverter circuit does this electrical energy inverting transformation. The terms voltage-fed and current-fed are used in relation with the output from inverter circuits. Conventionally, inverters are classified into two broad categories – voltage source inverter (VSI) and current source inverter (CSI). A VSI is one in which the dc input voltage would have to keep constant and
The interleaved buck converter with continuous supply current has been shown in Fig.3. The topology consists of two input capacitors Cin1 and Cin2, two switches Q1 and Q2 which are triggered 180 degrees apart, two freewheeling diodes D1 and D2, two phase inductors L1 and L2, an output inductor Lo and an output capacitor Co. The voltage stress experienced by the switches and diodes are reduced due to the presence of the input capacitors. In the interleaved structure the current flowing through the
short burst of energy over a short duration of time. There had been many technologies developed to emulate characteristics of an ideal power supply which can store large amounts of energy, providing good power output as well as being able to be charged and discharged rapidly without deterioration of any type. A typical power storage device can be characterized by its power density and its energy density, noting that with our current technology, none which can achieve the best of both. A relatively new
IV. PROPOSED CONVERTER WITH MAGNETIC COUPLING Power Circuit With Magnetic coupling Fig.4 SEPIC Converter With Magnetic Coupling The classical SEPIC and modified SEPIC without magnetic coupling is as shows fig. 3 and 4. Boost converter gain is half of the SEPIC converter without magnetic coupling but in some application extreme high gain is needed in such cases without magnetic coupling SEPIC converter compactable. One practical limitation of SEPIC converter is duty cycle should not be high because
Control and Conversion of Electrical Power by Power Semiconductor Devices Power electronics refers to control and conversion of electrical power by power semiconductor devices wherein these devices operate as switches. Advent of silicon-controlled rectifiers, abbreviated as SCRs, led to the development of a new area of application called the power electronics. Prior to the introduction of SCRs, mercury-arc rectifiers were used for controlling electrical power, but such rectifier circuits were part
circuit is used for various photovoltaic applications. Keywords: Coupled inductor, Interleaved boost converter I. INTRODUCTION Nowadays, coupled inductor interleaved boost converter is used in most of the photovoltaic application, electric vehicles, power factor correction. Here input and output current ripple is a major problem in dc-dc converter. The input current ripple of the dc-dc converter is inversely proportional to input inductor current value. So the larger inductor value results in low ripple
This project is about to develop the power converter with improved performance with low voltage and high current dc output.One of the application of low voltage,high current dc output is supercapacitor charger(12V,20A).This paper describes the high frequency(hf) transformer and resonant inverter intended to obtain better efficiency by maintaining the constant low voltage. Keywords—parallel resonant inverter, Resonating components, High frequency transformer, Leakage inductance, Transfer Function
CHAPTER -1 INTRODUCTION INTRODUCTION The power in the battery is in DC mode and the motor that drives the wheels usually uses AC power, therefore there should be a conversion from DC to AC by a power converter. Inverters can do this conversion. The simplest topology that can be used for this conversion is the two - level inverter that consists of four switches. Each switch needs an anti - parallel diode, so there should be also four anti parallel diodes. There are also other topologies for inverters
integral multiple of fundamental frequency. Now a day more use of power electronic switches and devices cause harmonics. Examples of harmonics producing loads are computers, adjustable speed drives, etc. Mitigation of harmonics can be done with the help of passive filters or active filters. Hybrid of active and passive filters also solves problems of harmonics. Figure 1.5 Distorted Current Waveform Due To Harmonics 1.3 SOURCES OF POWER QUALITY PROBLEMS Sources of PQ problems in all the fields such
"Right to the Button" The "nuclear suitcase" draws in for 100,000 rubles a month. "From here, lads, our homeland dictates its unyielding will to the rest of the world's community." Thus Sergey Artsibashev's hero spoke about our army to recruits in a well-known film comedy, while pointing to a ballistic missile launcher. MK'scorrespondent visited the site, about which one can say the same words with a clean conscience -- the Central Command Post of the Russian RVSN [Strategic Missile Troops]
the best part of my degree. During my first year of Masters, My course featured analog Electronics and Power electronics; to understand these courses better I took a short duration training to seek learning in electronics from the basics. I opted to do a short duration project on to learn the working of a Switched Mode Power Supply. Till high school, I had knowledge of working of a power supply. But this was time where I came across the working of a SMPS and its vast applications from personal computers
a solar panel's cells produce power by capturing sunlight instead. They are sometimes called photovoltaic cells because they use sunlight ("photo" comes from the Greek word for light) to make electricity (the word "voltaic" is a reference to electricity pioneer Alessandro Volta). In this project we are going to use solar panel and DC hub motor. The voltage generated by the solar panel is stored in battery (48V/20AH) through charging circuit. From the battery, power will be supplied to the DC hub
Data Storage A computer contains various components such as input devices, output devices and CPU etc. We also use a number of other things such as instructions, program etc. All these are of no use if you do not have data to work with. Data can be stored only in the data storage unit. A storage is the essential component of any digital computer. It is required in a computer to store programs and the data processed by programs. Modern computers have incredible speed of processing because of fast
while travelling as power supply source is not generally accessible. If you keep your cell phone switched on continuously, its battery will go flat within five to six hours, making the cell phone useless. A fully charged battery becomes necessary at times when you need to use them. Here is a simple charger that replenishes the cell phone battery within two to three hour. This device was accomplished by Max Donelan. He invented a knee braces to harness the human power which according to him
transport and land in an efficient manner, which in turn has lead to innovative and at the same time simple yet effective methods to reduce carbon emissions. The purpose of this report is to explain in brief to the Senior Management of a hypothetical supply chain company on how carbon emissions are being reduced. This report is structured in way to cover all areas of logistics management from sourcing of raw materials from suppliers to distribution of finished products to end customers. And it explains
surveillance, and striking the enemy without being detected and assisting ground soldiers with supplies. An example of the modern UAV drone is the MQ-9 reaper, capable of flying at altitudes of 50,000 feet, cary an internal payload of 800 pounds and external payload of over 3,000 pounds. The MQ-9 can cruise for more than 40 hours at speeds over 70 knots and can be switched to a complete auto-pilot mode in which computer programs will fly by
less but more to operate, than EMS should result in better efficiency because the train will weigh less. How Maglev Works Electromagnetic Suspension (EMS) Electromagnets are magnets that can be turned on and off with electricity. There is a big power source, metal coils in the track and magnets under the carts. The Maglev does not have an engine but is propelled by magnets in the track, called a guideway. Magnets in the guideway, repel the magnets in the train causing it to levitate between 1 to