# cylindrical and salient pole shoe rotors for electric

2021-5-5 · Non-salient pole rotors are cylindrical in shape having parallel slots on it to place rotor windings. It is made up of solid steel. The construction of non-salient pole rotor ( cylindrical rotor) is as shown in figure above. Sometimes, they are also called as …

Cylindrical, round rotors, (also known as non salient pole rotor) are used for up to six poles. In some machines or when a large number of poles are needed, a salient pole rotor is used. The construction of synchronous motor is similar to that of a synchronous alternator.

2021-7-9 · In cylindrical polar (non salient), construction flush with the surface of the magnetic poles of the rotor are formed as a cylinder. Cylindrical rotor is commonly used for the two poles and four rotor poles. The rotor is usually driven at high speed so genetor who use this pole is …

2020-12-25 · Salient pole type or projected pole type rotor ( low speed, more number of poles, kaplan turbines ) Non-salient type or smooth cylindrical type rotor ( high speed, 2 or 4 poles, pelton wheel ) Salient Pole Type Rotor : The salient pole type construction of …

2016-5-13 · The Salient Pole Rotor consists of a large number of projected poles mounted on a magnetic wheel; the poles are made of steel laminations supported by pole shoes on which the rotor winding is wound as shown in Figure 1(b). Salient pole rotors has maximum large diameter of 15m and shorter axial length in the range of 0.15 to 0.2. They

2015-6-12 · ANSWER: c. Smooth cylindrical type. Q3. The phasor addition of stator and rotor mmfs is possible in a smooth cylindrical synchronous generator because. a. Mmfs of stator and rotor are stationary with respect to each other. b. Mmf of stator is stationary and that of rotor is rotating. c. Mmf of stator is rotating and that of rotor is stationary.

2018-6-5 · Abstract This article presents a review of the connection between salient pole shoe shapes and form factors that model saliency affects in synchronous machine design programs. Additionally, the impact of the pole shape on the harmonic contents of the air-gap flux density waveform is examined. The properties of different pole shoes are assessed with 2-D finite element analysis in the working ...

2021-4-7 · currently used by GE for two-pole generators are radial flow cooling and diagonal flow cooling, as shown respectively in Figure 6and Figure 7. Radial Flow Cooling Radial flow cooling is used for small and medi-um sized two-pole units and for large four-pole units. The ventilation arrangement shown in the slot cross-section of Figure 6permits gas to

2020-1-11 · The windage loss depends on the design and shape of the rotating object. In synchronous machine, the salient pole rotors have more windage loss as compared to windage loss in non-salient or cylindrical rotor. If the fan is used in motors for cooling, the windage loss takes place in the fan as well.

Non-Salient pole generator (the steam and gas turbine) has cylindrical rotors that have a very high speed of rotation. Therefore, a cylindrical rotor provides greater mechanical strength and have more accurate dynamic balancing. The differences between the salient pole rotor and the cylindrical …

2017-11-24 · The second type of synchronous motor i.e. the salient pole rotors have projecting poles in it. These projecting poles lessen its mechanical strength. This type of rotor construction is used for low speed applications such as hydroelectric generators. Large number of poles in the rotor makes the rotor larger in diameter and smaller in length.

2020-6-22 · Due to the size and lower speed of the rotor, they are more stable due to large inherent inertia. The third difference between salient pole and cylindrical pole is that the cylindrical pole (non-salient) design is much more durable and has a much lower winding loss than a salient pole unit.

Downloads. Designed, built and tested in the motor factory, solid salient pole rotors are suitable for applications requiring long duty cycles. This rotor has solid poles and a strip-on-edge field winding. The shaft and pole bodies are of integral construction, produced from a …

2011-7-19 · 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. Due to low speed, they are constructed with higher no. of pole (ranging …

2016-10-31 · Cylindrical rotors are used in high speed electrical machines, usually 1500 RPM to 3000 RPM. Windage loss as well as noise is less as compared to salient pole rotors. Their construction is robust as compared to salient pole rotors. Number of poles is usually 2 or 4. Damper windings are not needed in non-salient pole rotors.

2006-7-8 · Therefore the rotor would appear to have thermal sensitivity. I know this can be a problem with Cylindrical pole rotors due to differential expansion and bowing of the rotor causing unbalance. However can this happen with a salient pole rotor? I have not been able to find any reference to thermally sensitive salient pole rotors.

2015-10-5 · Then a logical explanation (my thougts) would be that cylindrical rotors are used in turbo generators with high speeds/forces and they are machined from solid steel. Salient pole rotors are made for hydro plants, slower speeds where laminated construction is cheaper. \\$\endgroup\\$ – Marko Buršič Oct …

2020-6-20 · The salient pole rotor is one type of rotor construction, the word “salient” means to project. A Salient pole rotor consists of poles projected from the surface of the rotor core. But let’s pause here. There is another type of rotor field, which is called a non-salient (cylindrical) rotor.

2011-7-19 · 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 lamination's 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.

2021-6-1 · 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.

Hybrid salient pole machines ... For a hybrid salient pole machine 16 a cylindrical element has salient poles with excitation windings situated around the salient poles and permanent magnets supported by the salient poles. ... General Electric Company (Niskayuna, NY) Primary Class: 310/181. Other Classes: ...

The rotor 13 of the electric machine 10 has salient poles 1 that carry pole windings 2. The windings 2 comprise flat copper conductors of which several project outwardly as cooling fins 3. The cooling of the rotor 13 of the electric machine 10 is achieved by cooling air that is directed to within the machine by a blower (not illustrated ...

2021-5-1 · Smooth cylindrical type alternator; Salient pole alternator; 5. Why do cylindrical Alternators operate with steam turbines? Steam turbines are found to operate at fairly good efficiency only at high speeds. The high speed operation of rotors tends to increase mechanical losses and so the rotors should have a smooth external surface.

• Cylindrical in shape having slots on the rotor surface where field windings are embedded. • Used for two- and four-pole rotors. • Prime movers are generally gas or steam turbines (with high speeds usually 1500 RPM to 3000 RPM). • Projected Poles where field windings are wrapped around. • Used for rotors with four or more poles.

2021-6-22 · Type and construction of rotors. Induction (asynchronous) motors, generators and alternators (synchronous) have an electromagnetic system consisting of a stator and rotor. There are two designs for the rotor in an induction motor: squirrel cage and wound. In generators and alternators, the rotor designs are salient pole or cylindrical.

Question is ⇒ Salient pole type rotors as compared to cylindrical pole type are, Options are ⇒ (A) small in diameter as well as axial length, (B) large in diameter as well as axial length, (C) smaller in diameter and larger in axial length, (D) larger in diameter and smaller in axial length, (E) , Leave your comments or Download question paper.

Below is a summary of various features and pit capabilities. Ability to accommodate rotors up to 45 feet long. 30-, 50- and 85-ton cranes for pit service. Rail-guided transport dollies for the larger rotors above crane capacity, up to 100 tons. Large inventory of bearings and stub shafts to fit nearly every rotor.

2021-7-4 · 1.Salient Pole Alternator: Poles are projecting out from the surface. The air gap is non-uniform. Diameter is high and the axial length is small. Mechanically weak. Preffered for low-speed alternators. Prime mover used are water, I.C. engines. For the same size, the rating is smaller than the cylindrical …

Transportable salient pole rotors are serviced at our Rotating Equipment Service Center. These rotors are usually the cast spider types. Hydrogenerators and other salient pole machines consist of a rotating spider mounted on a shaft with field poles mounted on the spider rim. We have manufactured new field poles for more than a dozen units ...