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poles are not projected outwards
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How many poles as salient pole rotor?
'Salient' means 'sticking out', so if the pole sticks up from the rotor shaft, then it is a salient pole machine.
What is the difference between salient pole and non salient pole machines?
Rotors used in Synchronous alternators can be classified into 1)Salient and 2)Non-Salient Pole Rotors. Salient pole rotors are used in application with speeds from 100 to 1500rpm. They are alternative known as "projected pole" type of rotors. The poles mounted on the rotor are made of laminations made of steel. The poles are connected to the rotor shaft by means of dovetail joints. Each pole has a pole shoe around which the winding is wound. The salient pole rotor is generally used in applications where the prime mover is a hydel turbine or a combustion engine which have low or medium speeds. Salient pole rotors usually contain damper windings to prevent rotor oscillations during operation. Non-salient pole rotors are generally used in application which operate at higher speeds, 1500rpm and above. The prime movers in these applications are generally gas or steam turbines. These are sometimes known as "drum rotors". The rotor is a cylinder made of solid forged steel. The slots on which the windings are fixed are milled on the rotor. The number of poles is usually 2 or 4 in number. Since these rotors are cylindrical, the windage loss is reduced. The noise produced is also less. These rotors have higher axial length. These rotors do not need damper windings.
What is salient pole construction details?
'Salient' means to 'stick out', so salient poles stick out from the machine's shaft, as opposed to shafts which are slotted to contain its windings.
COMPARE SALIENT POLE AND HNDRICAL ROTOR MACHINES?
sailant
Why is used just 2 or 4 poles in non salient pole rotor?
to force the generation machines ( generator in power plant) to work on constant speed which mean constant frequency for any power network n= 120 F / p
What is salient and non salient pole alternator?
In salient pole alternator Xar is unequal in D-axis and Q-axis, due to non uniform air gap where as in non-salient pole Xar is equal in every axis due to uniform airgap between stator and rotor. Xar is armature reaction reactance.
How many poles as salient pole rotor?
'Salient' means 'sticking out', so if the pole sticks up from the rotor shaft, then it is a salient pole machine.
What is meant by salient and non-salient pole machine?
for salient type motor Lq>Ld, and non-salient type motor Lq=Ld; Lq and Ld are q-d axis inductanceAnswer'Salient' means to 'stick out', so a 'salient pole' machine is one whose rotor windings are fitted to pole pieces that stick out from the rotor shaft. A 'non-salient pole' machine is one in which the windings are placed in slots machined along the length of the rotor.Salient pole machines run slower and have more poles than slotted-rotor machines, and are typically used in alternators run by water turbines; slotted-rotor machines are typically used in alternators run by high-speed steam/gas turbines.
How many different types of alternator are there for a 1998 fore contour?
type 1: single phase tree phase poly phase type 2: rotating armature rotating field type 3: salient pole machine non salient pole machine type 1: single phase tree phase poly phase type 2: rotating armature rotating field type 3: salient pole machine non salient pole machine
What are the Types of alternators based on rotor construction?
Types of rotor-Salient pole or projected typeNon salient pole or cylindrical typeSalient type is used for low speed or medium speed motor where non salient type is used for high speed rotor.
What is the difference between salient pole and non salient pole machines?
Rotors used in Synchronous alternators can be classified into 1)Salient and 2)Non-Salient Pole Rotors. Salient pole rotors are used in application with speeds from 100 to 1500rpm. They are alternative known as "projected pole" type of rotors. The poles mounted on the rotor are made of laminations made of steel. The poles are connected to the rotor shaft by means of dovetail joints. Each pole has a pole shoe around which the winding is wound. The salient pole rotor is generally used in applications where the prime mover is a hydel turbine or a combustion engine which have low or medium speeds. Salient pole rotors usually contain damper windings to prevent rotor oscillations during operation. Non-salient pole rotors are generally used in application which operate at higher speeds, 1500rpm and above. The prime movers in these applications are generally gas or steam turbines. These are sometimes known as "drum rotors". The rotor is a cylinder made of solid forged steel. The slots on which the windings are fixed are milled on the rotor. The number of poles is usually 2 or 4 in number. Since these rotors are cylindrical, the windage loss is reduced. The noise produced is also less. These rotors have higher axial length. These rotors do not need damper windings.
What is the salient pole type field structure andnon silent pole type field structure in an alternator?
There are two types of rotors - salient pole and round rotor. Salient pole rotors have protuding poles that the coils are wrapped around, and are typically used when many poles are needed. The main electomagnetic difference is a salient pole machine naturally has a varying air gap between the rotor and the stator, due to the pole saliency.
What is the priniciple of salient pole alternator?
The term, 'salient', simply means to 'stick out'. So a salient pole machine has field poles that stick out from the rotor. The principle of operation is the same as for any other generator.
What is salient pole construction details?
'Salient' means to 'stick out', so salient poles stick out from the machine's shaft, as opposed to shafts which are slotted to contain its windings.
COMPARE SALIENT POLE AND HNDRICAL ROTOR MACHINES?
sailant
What is salient pole of a generator?
The phrase "Salent Pole" is used to specify a specific internal field winding configuration around the magnet of a generator. In English, Salient means "sticking out" or "most noticeable or important". Pole refers to the North or South end of a magnet. If you take a long rectangular magnet with a North and South Pole on each end, and you surround it with electrically conductive material like wire, and you spin the magnet, electrons will flow back and forth in the wire. This is how some generators create electricity. You can determine if your generator is a salient pole generator by inspecting its internal components. With a salient pole generator, you would notice that the magnetic poles in the magnet are "sticking out" and when passed in proximity to the wire an electrical current is created. For a salient pole machine, the windings are wrapped around magnets with edges or teeth that stick out. To read up on the discovery, evolution and present day use of salient pole electricity generating technology: http://mysite.du.edu/~jcalvert/tech/salpomo.htm The Dinorwig Power Station in Wales utilizes Salient Pole generators to pump billions of gallons water up a mountain as well as generate electricity when letting it back down again as an electricity storage system: http://en.wikipedia.org/wiki/Dinorwig_Power_Station
Why salient pole machine have higher air turbulence?
The term used is 'windage', rather than 'air turbulence', but the reason is in the name: 'salient' means to 'stick out' -salient poles extent from the rotor, offering greater 'drag', if you like. This is not as critical as it may sound, because salient pole machines are normally driven by water turbines, which rotate at much lower speeds than alternators driven by steam turbines.
