Synchronous machines and induction machines have different construction of their rotors The rotor winding in most induction machines is a short circuited cage made of aluminum bars which are placed in the rotor slots
A synchronous machine is a most important type of electric machine The generating machines found in all generating stations are synchronous machines and are commonly known as synchronous generator or alternators Synchronous motors are well known for their constant speed operation and are widely used in industries
Construction of a Synchronous Machine alternator or motor consists of two main parts namely the stator and the rotor The stator is the stationary part of the machine Slots are cut on the inner periphery of the stator core in which 3 phase or 1 phase winding is placed Enameled copper is used as winding material The winding is star
Multiphase machines with a prime number of phases five and seven have shown better torque density than machines with other phase numbers Unfortunately these machines require a special stator design Hence this article proposes general rewinding techniques to obtain a five phase winding from the existing standard three phase stator
In a synchronous generator a DC current is applied to the rotor winding which produces a rotor magnetic field The rotor of the generator is then turned by a prime mover producing a rotating magnetic field within the machine This rotating magnetic field induces a three phase set of voltages within the stator windings of the generator
The rotor of a synchronous machine is a large electromagnet The magnetic poles can be either salient sticking out of rotor surface or non salient construction
Construction of Single Phase Induction Motor A single phase induction motor is similar to the three phase squirrel cage induction motor except there is single phase two windings instead of one three phase winding in 3 phase motors mounted on the stator and the cage winding rotor is placed inside the stator which freely rotates with the help of mounted bearings
In a synchronous machine the average EMF induced per phase is called dynamic induces EMF in a synchronous motor the flux cut by each conductor per revolution is Pϕ Weber Then the time taken to complete one revolution is 60/N sec The average EMF induced per conductor can be calculated by using PϕN / 60 x Zph = PϕN / 60 x 2Tph
A 3 phase alternator is a synchronous machine that converts mechanical energy into 3 phase electrical energy through the process of electromagnetic induction As we discussed in previous chapters a 3 phase alternator also called a 3 phase synchronous generator has a stationary armature and a rotating magnetic field
The construction of a synchronous motor is very similar to the construction of an alternator Both are synchronous machines where one we use as a motor and the other as a generator The stator windings could be either three phase windings or single phase windings Enamelled copper is used as the winding material In the case of 3 phase
Multiphase machines with a prime number of phases five and seven have shown better torque density than machines with other phase numbers Unfortunately these machines require a special stator design Hence this article proposes general rewinding techniques to obtain a five phase winding from the existing standard three phase stator frames The proposed rewinding
3 Synchronous Motor Construction; Operating Principle; Applications of Synchronous Motors; Starting Methods for Synchronous Motors; A three phase synchronous motor has no starting torque It has to be brought up to speed or as close to it as possible by some other means so that it can pull itself into synchronism
The stator of a synchronous machine is such that 3 phase; 4 poles; 36 slots; winding double layered; 2 slots short pitched and 2 turn for each single both the winding factor and the effective turns per the winding over a pole pitch indicating the location of the conductor of each ; turns
The construction of a synchronous motor is very similar to the construction of an alternator Both are synchronous machines where one we use as a motor and the other as a generator The stator windings could be either three phase windings or single phase windings Enamelled copper is used as the winding material In the case of 3 phase
PDF On Sep 22 2021 Hossein Parivar published Construction of Synchronous Machine Find read and cite all the research you need on ResearchGate
• The exciter generator s 3 phase output is rectifiedto DC by a 3 phase rectifier mounted on the shaft and fed into the mainDC field circuit • It is possible toadjust the field current on the main machine by controlling the small DC field current of the exciter generator located on the stator Construction of Synchronous Machine Part
2 Classification of DC Machine There are different types of DC machines like series shunt short shunt compound and long shunt compound According to the field excitation method the DC machines are classified as; Separately Excited DC Machine; Self Excited DC Machine; Separately Excited DC Machine
Synchronous machines can operate in motor or generator modes When the synchronous machine operates in a no load mode and the excitation field is under control it is called a synchronous condenser or a synchronous compensator Different losses in synchronous generators include ohmic losses core losses mechanical losses and excitation losses
Module 3 Electrical Machines Construction and working of a three phase induction motor The three phase induction motors are simple in construction rugged low cost and easy to maintain They run at a constant speed from no load to the full load Therefore these motors are frequently used in industry Construction of Three Phase Induction Motor
Though a synchronous generator can be single phase or three phase due to some technical and economic benefits three phase synchronous generators are the most widely used Construction of Synchronous Generator The construction of a synchronous generator alternator is
Construction of Three Phase Induction Motor Like any electric motor a three phase induction motor has a stator and a rotor The stator carries a 3 phase winding called stator winding while the rotor carries a short circuited winding called rotor winding Only the stator winding is fed from the 3 phase supply
2 What is Alternator AKA AC Generator or Synchronous Generator Construction Working Types and Applications Components & Parts of Alternator Alternator or synchronous generator is the same machine as synchronous motor except the power flow diagrams and reverse operation Three Phase Induction Motor Construction Working Types
Three Phase Synchronous Machines Free download as PDF File pdf Text File txt or read online for free This document provides an overview of three phase synchronous machines including their construction operation principles and applications as generators and motors Key points include Synchronous machines can operate as generators or motors and
5 Make sure the construction of stator & rotor are in such a way that there must be an air gap between the stator & rotor them Precaution Make sure there must be proper lamination in all the part & also in the winding in order to reduce the losses Result We studied the construction of three phase synchronous machine
