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Home inverter is an electrical device used to give the power to the electric appliances in the event of the power failure. The name inverter implies first changes alternating current to  direct current to charge the battery then, it inverts direct current to alternating current for powering the electric devices There are different types of Inverters are available in the market. The most proficient inverter is the pure sine wave which produces an alternating current like to the domestic power supply in wave form. Generally, the low cost types of inverters mainly include Square wave & quasi sine wave. But, less efficient than the pure sine wave inverter because some electric machines will not work properly in these inverters. Now, solar powered inverters are very famous to conserve energy, but the cost will be very high as it needs a very large solar panel.

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An inverter is a motor control that adjusts the speed of an AC induction motor. It does this by varying the frequency of the AC power to the motor. An inverter also adjusts the voltage to the motor. This process takes place by using some intricate electronic circuitry that controls six separate power devices. They switch on and off to produce a simulated three phase AC voltage. This switching process is also called inverting DC bus voltage and current into the AC waveforms that are applied to the motor. This led to the name “inverter”. For the rest of this discussion, the term “inverter” will be used in place of adjustable speed drive.

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The transistor amplifier which escalates the power level of the signals will have the audio frequency range is called as a transistor audio power amplifier. The practical amplifier contains a number of stages which will amplifies weak signals until required power is existing to activate the output device like loud speakers. In some stages the multistage amplifier will have the functions of voltage amplifier, hence the maximum power is in the last stage is called as the power stage. The basic block diagram of the audio amplifiers is given.

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The concept of maximum power transfer theorem was proposed by “Moritz Von Jacobi” in the mid 19th century. The other name given to this theorem is Jacobi’s law. The main scenario is to transfer the maximum power and not maximum efficiency. Maximum power transfer theorem states that “the power transferred from a source or circuit to a load is maximum when the resistance of the load is made equal or matched to the internal resistance of the source or circuit providing the power to the load”. It can be used in the applications of both AC and DC circuits.

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The term Wheatstone bridge is invented and named by Charles Wheatstone. The main purpose of this circuit is to calculate the value of unknown resistance. But, the current digital multimeters gives a simple way to calculate a resistance. The applications of the Wheatstone bridge mainly involves, it can be used in amplifier circuits to interface different sensors and transducers with modern operational amplifiers. The Wheatstone bridge circuit is designed with two serial and parallel resistances in between two terminals like voltage and ground. When the Wheatstone bridge is stable, then the GND terminal creates a zero voltage difference b/n the two parallel branches. A Wheatstone bridge circuit comprises of two i/p terminals and two o/p terminals, that are arranged in a diamond shape using four transistors.Please follow the below link for projects: Electrical and electronic projects for honors

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The term Shockley diode or PNPN diode is named from the inventor “William Bradford Shockley”. It is a four layer semiconductor device and it was the first semiconductor devices. It is similar to a thyristor with detached gate. Even though, this type of diode is not available commercially and not particularly useful. But, this diode is most useful in making other kinds of thyristors such as DIAC, TRIAC and SCR. Once we understand the basic concept of this diode, we will easily understand the other concepts covered in thyristors. Let us know the working of a Shockley diode and applications. [Read more…]