Inductance

With the ability to distinguish between high amperage circuits and high voltage circuits, this laid the baseline for what we know today as “Inductance”. Electrical conductor produces energy by the changing of current or the changing of voltage to produce a strong magnetic force while only using a small battery. By Joseph Henry’s introduction to inductance also paved a path for the invention of electric motors. These advances in technology developed a method for illuminating homes and streets. The

Similarly R_s,L_s,R_r & L_r are the stator résistance, stator self inductance, rotor resistance and the rotor self inductance. The rotor time constant is given as T_r=L_r/(R_r ) and leakage inductance as σL_s where σ=1-〖L_m〗^2/(L_r L_s ). The convergence of estimated value in Eq. 2.1 and Eq. 2.2 to the actual value E can be assured with a suitable dynamic characteristic. It gives

create an AC waveform at a lower frequency (less than a third of the supply frequency) Lower motor frequency complements low prop shaft frequency. Although a large amount of ripple in the voltage waveform, the current is smoothed by motor and line inductance. Larger frequencies cause higher ripple, so they are frequency limited. The basic cycloconverter is connected as a back-to-back 6-pulse Thyristor bridge. It is used in several configurations depending on the motor phase number and cycloconverter

Have you ever heard about how electricity are distribute into the electrical system? There have to be circuits that are programmable by a computer in order to make the circuit to perform the right task. For example there are programmable circuits that allow traffic light to change color. Each color is programed for a certain time to change color. For example a red light might change to green after couple of minutes. An electrical machine without circuits will not work because there is nothing that

lines. This may be the result of capacitance between the two lines or the effect of inductance. This effect is known as crosstalk, and often occurs in multi-cored cables and in the ribbon cables used for connecting computers to peripherals. The term crosstalk is often limited in its use to circuits/conductors in close proximity, where the coupling path may be characterized by the mutual capacitance and mutual inductance of the circuits. It may be eliminated in multi-cored cables by having each of the

Fig. 7 (a-b) show the real and imaginary parts of the rotor voltage respectively for all operating wind speeds. As shown in Figs. 7(a) and 7(b), increasing of DFIG stator lead reactive power, increases the real and imaginary part of rotor voltage which supplied by the rotor converter. Increasing DFIG stator lag reactive power, decreases the real part of rotor voltage in all speed range, increases the imaginary part of rotor voltage in sub-sunchronous speed range and decreases the imaginary part of

Chapter 01 Introduction Basic DC to DC Converter A DC-DC converter is a device used to obtain variable d.c. voltage from a source of constant d.c voltage .Therefore it may be thought of as d.c equivalent of an a.c transformer. Since they behave in an identical manner .Besides the saving in power, the d.c choppers offers greater efficiency, faster response lower maintenance, small size, smooth control and for many applications, lower cost than motor generator sets or gas tubes approaches. Solid-state

Reactive Power Support and control for Wind Farms Ashish Mishra (R11324429) Department of Electrical and Computer Engineering, Texas Tech University Final term Paper for ECE 5343 – Power Systems Engineering Abstract: This report contains details on the reactive power compensation techniques for fixed-speed wind turbines as well as the inherent reactive power support provided by the variable-speed wind turbines. This paper also reviews the latest grid codes and requirements for reactive power support

CIRCULAR PATCH- ANDREA ALU et al[2[Only fundamental mode can be excited in such a wavelength rectangular cavity, providing out of phase radiation from radiating edge of patch. A sub wavelength resonance tuned at desired frequency while gain of radiator is expected to be very poor. The parallel plate cavity showed analogus limitation there are no degree of freedom in selecting the desired operating mode in sub wavelength regime of operation. A circular patch antenna loaded by a grounded inhomogeneous

ABSTRACT Now a days, the switching power supply market is flourishing quickly. The trend is for DC-AC converters with low cost, higher efficiency, power saving that enable maximum features. In this project, a single-stage three-switch buck-boost inverter is designed, where stepping up, stepping down and inversion operation will takes place in single stage. This proposed inverter will overcome all the drawbacks of traditional one. Coupled inductor plays a very important role in energy transfer and