DC machine full theory class | Electrical | RRB JEn 2022 | RRB ALP 2022 | Electrical Theory

DC machine full theory class | Electrical | RRB JEn 2022 | RRB ALP 2022 | Electrical Theory
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RRB Junior Engineer 2022 | Electrical | Previous year Questions | Electrical in Hindi | RRB JEn
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The DC machine can be classified into two types namely DC motors as well as DC generators. Most of the DC machines are equivalent to AC machines because they include AC currents as well as AC voltages in them. The output of the DC machine is DC output because they convert AC voltage to DC voltage. The conversion of this mechanism is known as the commutator, thus these machines are also named as commutating machines. DC machine is most frequently used for a motor. The main benefits of this machine include torque regulation as well as easy speed. The applications of the DC machine is limited to trains, mills, and mines. For example, underground subway cars, as well as trolleys, may utilize DC motors. In the past, automobiles were designed with DC dynamos for charging their batteries.

What is a DC Machine?
A DC machine is an electromechanical energy alteration device. The working principle of a DC machine is when electric current flows through a coil within a magnetic field, and then the magnetic force generates a torque that rotates the dc motor. The DC machines are classified into two types such as DC generator as well as DC motor.

Railway recruitment board (RRB) conducts RRB ALP & Technician exam to recruit Assistant Loco Pilot and Technician for different railway zones across the country. This is a national-level exam and lakh of candidates appear for it. RRB ALP selection process comprises two stages (first stage CBT and second stage CBT) which is common for ALP and Technician. In addition, candidates who opt for ALP and qualify the CBT 2, are required to undergo Computer Based Aptitude Test (CBAT). The final stage comprises document verification and empanelling.


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