Electrical4U 
What is a Brushless Motor? A brushless DC motor (also known as a BLDC motor or BL motor) is an electronically commuted DC motor which does not have brushes. The controller provides pulses of current to the motor windings which control the speed and torque of the synchronous motor. BLDC motors produce significant torque across … Read more
When Superconductors are cooled below their critical temperature, they expel magnetic field and prevent them from entering. This phenomenon is called the Meissner effect, discovered by German physicists Walther Meissner and Robert Ochsenfeld in 1933. They observed that cooling tin and lead samples below the critical temperature in an external magnetic field increased the magnetic … Read more
In a heavily doped semiconductor diode, the depletion region is very narrow. When this diode is in reverse bias, the narrow depletion region creates a high electric field across the junction. For instance, a 3V reverse voltage across a 100 Ao thick depletion region results in a strong electric field. The strong electric field breaks … Read more
What is Squirrel Cage Induction Motor A 3 phase squirrel cage induction motor is a type of three phase induction motor which functions based on the principle of electromagnetism. It is called a ‘squirrel cage’ motor because the rotor inside of it – known as a ‘squirrel cage rotor’ – looks like a squirrel cage. … Read more
What is an Electrical Power Distribution System? An electrical power distribution system provides power to individual consumer premises. The distribution of electric power to different consumers is transmitted via a much lower voltage level compared to the transmission of power over long distances (i.e. over long transmission lines). The distribution of electric power is done … Read more
What is a Thermal Power Plant? A thermal power generation plant or thermal power station is the most conventional source of electric power. The thermal power plant is also referred to as a coal thermal power plant and steam turbine power plant. Let’s dive into how a thermal power plan works. Theory of Thermal Power … Read more
History of SF6 SF6 or sulfur hexafluoride gas molecules are combined by one sulfur and six fluorine atoms. This gas was first realized in the year 1900 in the laboratories of the Faculte de Pharmacie de, in Paris. In the year of 1937, General Electrical Company first realized that SF6 gas could be used as … Read more
What is a Diode? A diode is defined as a two-terminal electronic component that only conducts current in one direction (so long as it is operated within a specified voltage level). An ideal diode will have zero resistance in one direction, and infinite resistance in the reverse direction. Although in the real world, diodes can … Read more
What is a Capacitor? Capacitors are one of the three basic electronic components, along with resistors and inductors, that form the foundation of an electrical circuit. In a circuit, a capacitor acts as a charge storage device. It stores electric charge when voltage is applied across it and releases the charge back into the circuit … Read more
Before examining the construction of an electrodynamometer type wattmeter, it’s important to understand its working principle. This wattmeter operates on a simple principle: when a current-carrying conductor is placed in a magnetic field, it experiences a mechanical force, causing the conductor to deflect. Construction and Working Principle of Electrodynamometer Type Wattmeter Now let us look … Read more