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What is Lenz’s law? Lenz’s law states that the time-varying electromotive force produces a time-varying current, again this current produces EMF or Back EMF. So the polarity of the induced EMF is opposite to the previous time-varying EMF. Lenz law was given by Sir Emil Lenz. This Law decides the direction or polarity of the … Read more
In the Power System of Electrical Engineering, when the receiving end voltage in an AC transmission line is greater than the sending end input voltage, it is called as Ferranti effect. Remember, it only dominates in a Long transmission line whose length is greater than 200 Km. Also, this effect occurs more effectively when the load is … Read more
Firstly, Corona Effect or Discharge are the same things. Electrical discharge caused by the ionization of the fluid (air) surrounding a conductor which is already charged electrically is known as the corona discharge or effect. this is the continuous waste of the energy. This is a spontaneous process and occurs naturally in High voltage (H.V.) … Read more
A Rectifier is a Power electronics device that helps to convert AC signal to DC signal. An AC signal has two polarities changing continuously. Every load cannot take an AC signal. So we need a DC supply for them. A half-wave and full-wave rectifier convert AC to DC signal. Half wave rectifier gives discontinuous rippled … Read more
What is the PIV rating or Peak Inverse Voltage rating? A PIV rating or Peak inverse voltage rating is defined as the value at which a Semiconductor device can withstand or sustain, beyond this value voltage device damage permanently. In short, the P-N junction barrier is damaged because of the high inverse voltage or the … Read more
What is a Resistor? A Resistor is an electrical component that reflects electrical resistance to the circuit current. It is a passive Element which means it only absorbs the electrical power. It cannot deliver power to the circuit connected with this element. Here we are discussing the Resistor definition, unit, symbol, types, color code, and applications. A … Read more
Continuous Electro-mechanical energy conversion devices are known as Electrical machines. Which is a reversible process. Electrical machines are machines that are either used to transfer or the generation of Electrical power. These may be low-power or high-power devices(in mV or kV). Here I am discussing the high-power devices in this article. Types of Electrical Machines: … Read more
What are the Geometrical neutral axis (GNA) and Magnetic neutral axis (MNA)? The Geometrical Neutral axis (GNA) bisects the angle between the two poles of a machine. Whereas the Magnetic Neutral axis (MNA) is the perpendicular axis on the magnetic flux line. Also machine has a “Direct (D) axis” and “Quadrature (Q) axis”. What is a … Read more
Open and short circuit tests are carried out to determine the equivalent circuit parameters of a single phase or 3 phase Transformer. An open circuit or the OC test of a transformer is used to measure “CORE losses“. Whereas the Short circuit or SC test of a transformer is used to measure the “Full load copper loss“. Open circuit or OC … Read more
A rotating machine has an essential part known as Armature winding. Generally, this is responsible for making a rotating magnetic field in a machine. As a result, it provides back emf to the supply. This armature winding is classified into two types. One is Lap winding and another is Wave winding. These have their special … Read more