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
bias applied. Once the voltage is applied in the forward direction, current will flow; in this case as the voltage is increased more current flows. Experiment 2: Rectifiers convert an AC into a DC by allowing a current to flow through it in one direction only. There are two kinds of rectifiers, Half- wave: A half-wave rectifier allows only one half-cycle of the AC voltage waveform to be applied to the load, using one half cycle of the applied voltage, the other half cycle being suppressed because
A dc voltage source which is supported by a large capacitor feeds the main converter circuit, a three-phase bridge. This dc voltage source can be a battery, fuel-cell stack, diode rectifier, or capacitor. Six switches have been used in the main circuit; each switch consists of a power transistor and an anti-parallel diode to provide bidirectional current flow and unidirectional voltage blocking capability. The V-source converter is
classified according to the type of the input and output power • AC to DC (rectifier) • DC to AC (inverter) • DC to DC (DC-to-DC converter) • AC to AC (AC-to-AC converter) 1.2 AC to DC converter(rectifier) A rectifier is an electrical device that can converts alternating current into direct current. The process is known as rectification. Rectifiers have many uses, but mostly used as components of DC power supplies and high-voltage direct current power transmission system. Because of the alternating
Radio frequency energy is the energy transmitted by sources that can generate electromagnetic fields like TV signals, radio signal, wireless networks and cell phone towers, by using specially designed circuits connected to a an antenna this electromagnetic energy can be harvested and converted into a usable DC voltage. One of the applications of this technology is in radio frequency identification tags in which harvesting device can receives an RF signal from a sensing device; this RF signal can
1.5.3.1. Benefits of Controlled Switching Controlled switching benefits include circuit breaker operation, enhancements, switching transient 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
Comparison between MOSFET And UTB SOI MOSFET Anuj Singh1, Abhisek Gupta1 , Gavish1 1Dronachraya college of Engineering, Gurgaon, India Abstract---The metal–oxide–semiconductor field-effect transistor (MOSFET, MOS-FET, or MOS FET) is a type of transistor used for amplifying or switching electronic signals .It is a four-terminal device with source (S), gate (G), drain (D), and body (B) terminals. The MOSFET generally uses silicon as semiconductor choice but lately chemical compound os silicone and
Essay prompt: Recount an incident or time when you experienced failure. How did it affect you, and what lessons did you learn? It is strange to think that failures can sometimes bring about the fondest memories and enrich conversations with the most amusing tales; as if the disastrous set of circumstances that provoked frustration and annoyance to the highest degree is to be considered a good thing, and that the severe discomfort or pain that came about from a failed event will bring joy and contentment
5. Silicon Controlled Rectifier (SCR): A silicon-controlled rectifier or semiconductor-controlled rectifier is a four-layer solid state current controlling device. It has three junctions, labeled J1, J2 and J3 and three terminals. The anode terminal of an SCR is connected to the P-Type material of a PNPN structure, and the cathode terminal is connected to the N-Type layer, while the gate of the Silicon Control Rectifier SCR is connected to the P-Type material nearest to the cathode. To turn-on of
Hypokalemic periodic paralysis also known as HOKPP or HypoPP is a condition that causes episodes of muscle paralysis associated with a fall in blood potassium levels, which in technical terms is hypokalemia. Episodes typically involve a temporary inability to move muscles in the arms and legs due to the lack of ions that should be received by the muscles. The first attack usually occurs in childhood or adolescence and can last for hours or days. The frequency of attacks varies among affected people
Applications of Diodes A diode is a two terminal device, widely used in the field of electronics. The smallest of circuits, to the largest, have diodes in them, in one form or the other. The function of the diodes can be explained by using an analogy of an air pump, which only allows the flow of air in one direction. Similarly a diode only allows the circuit to pass current through in one direction; this is done in two conditions. The conditions are a) Forward Bias or b) Reverse Bias Forward
process is similar to that of a transformer. In a transformer current is controlled by voltage. Similar to t... ... middle of paper ... ...nstruction and is very costly. Older controlling techniques use 16 pulse or 8 pulse rectifiers which are now replaced by 24 pulse rectifiers, which makes it effective in power factor regulation. Advantages of induction furnace: • Robust and simple in construction • Cost effective • Can reach up to peak temperatures in no time Conclusion: Furnaces are designed considering
1. Electrical Drives: Systems which employed for motion control are called as Drives. Drives employ any of the prime movers for deliverying mechanical energy for motion control like Diesel engines, steam turbines and electric motors. Drives which employ electric motors are called as Electrical Drives. Basically Drive is a combination of various systems combined together for the purpose of motion control. Electrical drives are available with vast range of torque, speed and potential. Can employed
Chapter 2 2.1 Frequency Converter From the electric energy conversion point of view we distinguish four basic converter types (Pavelka and Čeřovský, 2002). Rectifiers convert an input AC voltage and current to an output DC voltage and current, choppers convert an input DC voltage and current to an output DC voltage and current of different values, inverters convert an input DC voltage and current to an output AC voltage, current, frequency and count of phases, AC converters convert an input voltage
Chapter 1: Introduction 1.1 Background of study Induction Motors are widely used in industrial applications. It has been reported that they have a motor market share of approximately 80 percent. Their popularity stems from robust construction, low cost and ease of maintenance. As induction motors operate at a constant speed, they provide efficient operation in industrial applications if the loads that they drive remain fairly constant. However, the loads vary when the process conditions change during
The three phase induction motor is the most widely used electrical motor. Almost 80% of the mechanical power used by industries is provided by three phase induction motors because of its simple and rugged construction, low cost, good operating characteristics, absence of comutator and good speed regulation. In three phase induction motor the power is transferred from stator to rotor winding through induction. The Induction motor is also called asynchronous motor as it runs at a speed other than the
construction and ratings of various types of power diodes to convey the importance diodes have power electronics. Power Diodes: Power diodes are successors to the very first semiconductor devices. Power diodes are mainly used as uncontrolled rectifiers to convert single-phase or three- phase AC voltage to a rippled DC voltage. Typically they are constructed of a mixture of differently doped silicon or germanium. Most common are the silicon diodes because they can operate at higher currents and
It is the largest manufacturer of regulator/rectifier and capacitor discharge ignitors in India and is a key supplier to major two-wheeler and four-wheeler manufacturers. It is one of the early adopters of the 'Clean Room' manufacturing concept. Elaborating on this concept, Md. Imtiazuddin, senior manager-electronics
would not have MRI, and we would not be able to produce x-rays. Auto-transformers, step-up transformers, and step-down transformers use electromagnetic induction to change currents therefore being able to produce kVp, mAs, and DC current using rectifiers when it comes to x-rays. The following paper will describe in brief detail a little of Michael Faraday’s life, how electromagnetic induction came about, how MRI uses electromagnetic induction to function, and an explanation on how auto-transformers
The membrane contactors can be used in different components of the absorption refrigeration systems such as absorber, desorber, solution heat exchanger etc. In this section absorption refrigeration cycle configurations of the investigations reviewed in the present work are discussed. The principle of operation and the use of membrane contactors in the desorber of absorption refrigeration systems can alter the configuration of the cycle. However, the use of membrane contactors in the absorber has