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Surge proof soft start circuit

Hunting in Synchronous MotorKey learnings: Hunting Defined: Hunting in a synchronous motor is the phenomenon where the rotor oscillates around a new equilibrium position due to sudden changes in load. Causes of Hunting: Hunting can be caused by abrupt load changes, sudden field current adjustments, harmonic torque loads, or faults in the supply system. Effects of Hunting: This instability may cause the motor to lose synchronism, induce mechanical stresses, increase losses, and elevate temperatur

Synchronous Motor ExcitationPrior to understanding this synchronous motor excitation, it should be remembered that any electromagnetic device must draw a magnetizing current from the AC source to produce the required working flux. This magnetizing current lags by almost 90o to the supply voltage. In other words, the function of this magnetizing current or lagging VA drawn by the electromagnetic device is to set up the flux in the magnetic circuit of the device.The synchronous motor is doubly fed

Winding factor definitionThe winding factor is defined as the product of the pitch factor and the distribution factor.Pitch factorThe pitch factor is the phasor of the induced electromotive force and its ratio to its arithmetic sum, and is always less than the unit.This pitch factor is the fundamental component of the electromotive force. Magnetic flux waves can also be composed of spatial field harmonics, which produce corresponding time harmonics in the generated voltage waveform.Full pitch co

No-load protection circuit

Dc generator definitionA DC generator is defined as an electrical device that converts mechanical energy into direct current (DC) electricity. It works according to the principle of electromagnetic induction, when a conductor passes through a magnetic field, it creates a potential difference in the conductor, which, if connected to a closed circuit, causes a current to flow.Structure of DC generatorYokeThe yoke is usually made of cast iron or cast steel, depending on the size and weight of the g

Armature Reaction DefinitionArmature reaction in an alternator is defined as the effect of the armature’s magnetic field on the main magnetic field of the alternator or synchronous generator.Magnetic Field InteractionWhen the armature carries current, its magnetic field interacts with the main field, causing either distortion (cross-magnetizing) or reduction (demagnetizing) of the main field flux.Power Factor InfluenceAt unity power factor, the angle between armature current I and induced emf E,

Definition of alternatorAn alternator is defined as an alternator that uses a rotating field and a fixed armature to convert mechanical energy into electrical energy.Components of an alternatorThe alternator consists of two main parts: the rotor (rotating) and the stator (stationary).The construction of alternatorThe structure includes an exciting pole on the rotor and an armature conductor on the stator, which senses a three-phase voltage.Type of rotorConvex pole type (for low speed)The word "p

Contents Working Principle of Synchronous Machine Using Chopper Further Development of Synchronous Machine Using Chopper Conclusion of Synchronous Machine Using ChopperKey learnings: Excitation Control Definition: Excitation control is defined as managing the DC field excitation in a synchronous machine to control its performance. Working Principle: The working principle of a synchronous machine using a chopper involves stepping up the voltage and controlling it through PWM signals to achieve th

Contents Working Principle of Synchronous Machine Using Chopper Further Development of Synchronous Machine Using Chopper Conclusion of Synchronous Machine Using ChopperKey learnings: Excitation Control Definition: Excitation control is defined as managing the DC field excitation in a synchronous machine to control its performance. Working Principle: The working principle of a synchronous machine using a chopper involves stepping up the voltage and controlling it through PWM signals to achieve th