The blocked-rotor test of a squirrel-cage induction motor is an important experiment used to determine leakage reactance, resistance, and short-circuit characteristics of the motor. It is performed by locking the rotor and applying a reduced voltage to the stator. The main objective is to determine equivalent circuit parameters such as stator resistance, rotor resistance (referred …
Blocked Rotor Test of Three Phase Induction Motor Read More »
A MOSFET (Metal-Oxide-Semiconductor Field-Effect Transistor) is the most widely used transistor in modern electronics. It acts as a voltage-controlled switch that can turn circuits ON or OFF without any moving parts. It is used in devices like smartphones to high-power industrial motor controllers. Working Source (S): Where electrons enter (like water source) Drain (D): Where …
A PN junction diode is formed by joining two types of semiconductor materials: P-type semiconductor → rich in holes (positive charge carriers) N-type semiconductor → rich in electrons (negative charge carriers) When these two regions are joined, a junction is formed called the PN junction. As soon as the P and N regions are joined, …
Gauss’s Law is one of the fundamental laws of electromagnetism. It provides a simple way to calculate the electric field generated by a distribution of charge, especially when the distribution is symmetrical. In simple terms, Gauss’s Law states that the total electric flux (the flow of electric field lines) passing through any closed surface is …
An Electric Dipole Moment is a physical quantity used to describe the strength and orientation of an electric dipole, which consists of two equal and opposite charges separated by a distance. Consider two charges: a positive charge \(+q\) and a negative charge \(-q\), separated by a distance \(d\). The dipole moment \(\mathbf{p}\) represents how far …
To solve AC circuit problems, you need to understand the concept of the Power Triangle, which relates three types of power using trigonometry. Think of an AC circuit like a “latte”: the liquid is the useful energy doing work, while the foam represents extra power that does not perform useful work. Active Power (P): The …
In electrical engineering and physics, the Spherical Coordinate System is used to locate a point in 3D space using one distance and two angles. A point in this system is defined as \((r, \theta, \phi)\). The three coordinates are as follows: \(r\) (Radial Distance): The direct distance from the origin \((O)\) to the point \((P)\). …
Kirchhoff’s Voltage Law (KVL) is a fundamental principle in circuit analysis based on the Law of Conservation of Energy. KVL states that the algebraic sum of all voltages around any closed loop in a circuit is equal to zero. Mathematical Expression \sum V = 0 Concept In simple terms: Energy Supplied = Energy Consumed As an …
In electrical engineering, circuit elements are primarily classified into Active and Passive elements based on their ability to deliver, control, or absorb energy within a network. Active Elements Active elements are known as the “energy sources” or “energy donors” of a circuit. These elements are capable of supplying energy or providing power gain (amplification) over …
The Power-Angle Curve is a graphical representation of the relationship between the electrical power output (\(P_e\)) of a synchronous machine and its power angle (\(\delta\)). It is a fundamental tool for analyzing the steady-state stability of a power system. The electrical power transferred from a generator to an infinite bus is given by: $$P_e = …