Working principle of synchronous generator,Synchronous motor, Working principle of alternatorBasic Electrical Engineering
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The document outlines the working principles of electrical machines, specifically focusing on synchronous generators and motors. Synchronous generators operate based on Faraday's laws of electromagnetic induction, inducing voltage through the motion between the conductor and magnetic field. Synchronous motors utilize dual electrical inputs to maintain a fixed speed, relying on the interaction between the rotating magnetic field of the stator and the constant magnetic field of the rotor.
Working principle of synchronous generator,Synchronous motor, Working principle of alternatorBasic Electrical Engineering
- 1. ELECTRICAL MACHINE BASIC ELECTRICAL ENGINEERING WORKING PRINCIPLE WORKING PRINCIPLE OF SYNCHRONOUS MACHINE DAY 13
- 2. ELECTRICAL MACHINE Syllabus Introduction of Machine Classification of Machine Construction of DC, Induction & Synchronous machine Working Principle of DC Machine Synchronous machine Induction machine EMF Equation of all machine ……… DAY 9 DAY 10 DAY 11 DAY 12
- 3. WORKING PRINCIPLE OF SYNCHRONOUS MACHINE SYNCHRONOUS MACHNE SYNCHRONOUS GENERATOR SYNCHRONOUS MOTOR SYNCHRONOUS GENERATOR Mechanical Energy Electrical Energy Torque AC Voltage SYNCHRONOUS MOTOR Electrical Energy AC Voltage Mechanical Energy Torque Electrical Energy AC Voltage
- 4. WORKING PRINCIPLE OF SYNCHRONOUS GENERATOR AC Generators or specifically Alternators operate on the same fundamental principles of electromagnetic induction as D.C. GENERATORS which was proposed by Faraday. It means the synchronous generator works on the principle of Faraday laws of electromagnetic induction. The relative motion between the stationary conductor and the rotating field(Magnetic field on rotor) induces the EMF in the stationary conductor. The wave shape of the induces voltage always a sinusoidal curve. In synchronous generator Armature windings on Stator Field windings on Rotor – Which is energized by dc source to develop rotor magnetic field. Rotor is turned by a prime mover, producing a rotating magnetic field which induce 3 phase voltages in stator windings Stationary Conductor Which is given by:- Emf(e)=B.l.V volts B- Instantaneous value of flux density in tesla l = length of stator conductor in meter V = Speed of conductor in m/sec
- 5. WORKING PRINCIPLE OF SYNCHRONOUS MOTOR Synchronous motor is a doubly excited machine i.e two electrical inputs are provided to it. It’s stator winding which consists of a 3 phase winding is provided with three phase supply. Rotor winding is provided with DC supply. The three phase stator winding carrying three phase currents produces three phase rotating magnetic flux. The rotor carrying DC supply also produces a constant flux. AC Motors capable of running at a fixed speed irrespective of the applied load are called SYNCHRONOUS MOTORS. It work on the principle the magnetic interaction(Attraction) of a Rotating Magnetic Field ( stator part ) and one Constant Magnetic Field ( rotor part ). An additional rotation to the rotor is initially given in same direction of the revolving magnetic field ( rmf ) . The opposite poles of rmf and the rotor gets locked magnetically and the rotor starts rotating with the same speed of rmf or at Synchronous Speed. SYNCHRONOUS SPEED( Ns )= (120f)/p Where, f = frequency of electricity in Hertz. p = No. of poles. Rotating magnetic field