Tricky but Easy Electrical Engineering!
Ferranti Effect in a transmission Line is reduced using voltage compensation which in turn is accomplished by Shunt Reactor. Shunt Reactor is just like a Transformer but it has only primary and no secondary. Shunt Reactor is connected to all the three phases i.e. R, Y and B phase. Figure below shows a Shunt Reactor. … Read more
When there is a change in magnetic flux linkage through a conducting loop, an emf is developed as per the Faraday’s Law of Electromagnetic Induction. Generators use Electromagnetic Induction to convert mechanical energy into electrical energy. In an AC, or alternating current, Generator, the electrical current periodically reverses its direction. With a DC, or direct … Read more
In a large electric system such as the national Grid, it is necessary to control the voltage because there is an inverse relationship between voltage and current. As electric usage rises, such as on a hot day when everybody’s air conditioner is running, the current draw on the system rises. This current rise causes the … Read more
In electric power Transmission and Distribution, power is transmitted at a voltage level of 400 kV to reduce losses and then at the substation, it is stepped down to 132 kV at which electric power is transmitted and then at substation it is again stepped down to 33 kV. Power is then transmitted at 33 … Read more
The basic difference between induction motor and synchronous motor is that induction motor is an asynchronous machine whereas the other one, as the name suggests is a synchronous machine. Following are some important differences between Synchronous Motor and Induction Motor: Synchronous motors operate at synchronous speed (RPM=120f/p) while induction motors operate at less than synchronous … Read more
Linear Induction Motor (LIM) is an asynchronous motor, working on the same principle an Induction Motor works, but is designed to produce the rectilinear motion, unlike the rotary movement produced by a motor; hence the word Linear Induction Motor. LIM is an advanced version of rotary induction motor which gives a linear translational motion instead of … Read more
Servomechanism is a powered mechanism producing motion or forces at a higher level of energy than the input level, e.g. in the brakes and steering of large motor vehicles, especially where feedback is employed to make the control automatic. A servomechanism, sometimes also called Servo, is an automatic device that uses error-sensing negative feedback to … Read more
Enhancement Mode MOSFET: For an enhancement MOSFET, the channel does not initially exist. It only comes into existence once a voltage greater than Vth, threshold voltage is applied. For example, in an n-channel MOSFET, the substrate is made of p-type material. Consider the source to be at a reference ground potential of 0 Volts. For … Read more
In conductors i.e. metals the electrons that conduct current are called Itinerant electrons. They are essentially free to move around the metal, not bound to any particular atomic core. Resistivity can be understood as Itinerant electrons scattering off of Phonons, or thermal lattice vibrations, in a conductor. As the temperature of the metal increases, the … Read more
It is generally considered that 500 kV is the most economical voltage level at which to transmit large quantities of electrical energy over long distances. The best material for insulating overhead lines has been found to be porcelain, as its insulating qualities remain practically the same when exposed to all weather conditions. It has low … Read more