wide spread use of non – linear loads. “Harmonics is one such disturbance which will cause the power system”. These disturbances are detected and compensated in a better means by using Active Power Filters (APF). The identification and reference current generation is carried out by using Wavelet Transform (WT) Theory. Wavelet Transform Theory at present is one of the most powerful digital signal processing tool for time – frequency analysis of power quality disturbances. The gate pulses for Voltage
Premium Electric power transmission Electrical engineering Renewable energy
(kay rap)DEFINITION OF TERMS AC (alternating current) - In electricity‚ alternating current (AC) occurs when charge carriers in a conductor or semiconductor periodically reverse their direction of movement. Household utility current in most countries is AC with a frequency of 60 hertz (60 complete cycles per second)‚ although in some countries it is 50 Hz. The radio-frequency (RF) current in antennas and transmission lines is another example of AC. The usual waveform of an AC power circuit is a sine
Premium Alternating current Electricity Capacitor
shargabi 201020177 Abstract—In this document a DC (Direct Current) to AC (Alternating Current) conversion method using an H-Bridge will be introduced; components‚ simulation and hardware implementation will be presented. Index Terms— H-Bridge‚ DC to AC conversion‚ Power electronic application‚ Simulation. I. INTRODUCTION A power inverter‚ or inverter‚ is an electronic device or circuitry that changes direct current (DC) to alternating current (AC).[1] The input voltage‚ output voltage and
Premium Direct current Alternating current
AUTO MUTE FOR AUDIO DECK (Automatically Mute Your Audio System when you receive a call) Muting car’s audio deck‚ while talking on cell phone is an important yet difficult task. This project is designed to solve the problem. A sensitive IR transmitter and receiver pair is designed and fixed to a cell phone holder. Always the cell phone should be placed in the holder. The transmitter unit continuously transmits IR rays. These IR rays are interrupted by the cell phone. Whenever the cell phone
Premium Rectifier Capacitor Alternating current
Budget Deficits and Current Account Disequilibrium in Nigeria: An Econometric Investigation (1970-2010) BY Iyeli I. Iyeli‚ (Ph.D)‚ Clement Utting and Jacob O. Owan Department Of Economics University Of Calabar Calabar‚ Nigeria e-mail:reiyeli@yahoo.com; Tel: +2348036558316 Abstract This study on budget deficits and current account disequilibrium in Nigeria seeks to investigate the effects of budget deficits on current account within the time frame of 1970-2010. Data on this
Premium Macroeconomics Balance of payments Monetary policy
Arnhem‚ the Netherlands. All rights reserved. The contents of this report may only be transmitted to third parties in its entirety. Application of the copyright notice and disclaimer is compulsory. Phase to Phase BV disclaims liability for any direct‚ indirect‚ consequential or incidental damages that may result from the use of the information or data‚ or from the inability to use the information or data. 3 04-072 pmo CONTENTS 1 1.1 1.2 1.3 2 2.1 2.2 2.2.1 2.2.2 3 3.1 3.1.1 3.1.2
Premium Alternating current Electrical engineering Direct current
POWE INVERTER FOR HOME USE AND SIMPLIFIED CIRCUIT DIAGRAMME POWER INVERTERS Power inverters are simply DC (direct current) to AC (alternating current) converters - they convert DC energy stored in a battery‚ to the electric current (AC) that your appliances require. An inverter taps current from the public supply when that is on (or‚ alternatively‚ from a power generator)‚ stores that power in its battery bank as DC and converts it to AC when the power supply is gone. That way‚ the inverter
Premium Alternating current Direct current Electrical generator
instruments properly and measurements alternating current correctly. One of the most common and economical methods for measuring alternating currents is to rectify these currents and read the resultant DC on an analog or digital volt-ohm meter (VOM). You need to take many considerations into account when using rectification: what type of rectification you use‚ what scale conversion you will need‚ and the sensitivity of the meter. RECTIFICATION Alternating current periodically changes direction‚ which is
Premium Rectifier Root mean square Voltage
coil and a pair of secondary output coils. A fixed alternating current excitation is applied to the primary stator coil that is electromagnetically coupled to the secondary coils. • This coupling is proportional to the angle of the input shaft. The output pair is structured so that one coil is in-phase with the excitation coil‚ and the second is 180 degrees out-of-phase with the excitation coil. When the rotor is in a position that directs the available flux equally in both the in-phase and out- of-
Premium Alternating current Function Inductor
operate using vibration energy sources other than the standard charging mechanisms. As most of latest mobile phones are capable of charging from Universal Serial Bus (USB) we decided to design our circuit capable of supplying standard USB voltage and current rating. The circuit consists of a piezoelectric buzzer‚ a rectifier with a storage capacitor‚ an amplifier section‚ regulator and a switching mechanism that controls the energy flow into the battery. Experimental results showed that the method is
Premium Direct current Alternating current Rectifier