cylindrical rotor machine

Cylindrical Rotor | Synchronous-Motor | GE Power Conversion

This rotor is used in applications where a distributed winding is required. The rotor body is made from laminations with slots to take the windings. This rotor is made from a solid cylindrical forging, and machines out the pole bodies and pole tips.

Difference between Salient Pole & Cylindrical Pole Rotors ...

Difference between salient pole & cylindrical pole rotors: We can define a synchronous generator or alternator as a machine which converts mechanical energy into alternating type electrical energy.

Torque in Round Rotor Machine - EEEGUIDE.COM

Rotor is cylindrical (nonsalient pole) so that the air-gap is uniform through­out. ... The Torque in Round Rotor Machine in the expressions of Eqs (5.54) and (5.55) can be immediately imagined to be the result of the interaction of the stator and the resultant mmf's or the rotor and the resultant mmf's and is proportional to the sine of ...

Rotor (electric) - Wikipedia

The rotor is a cylindrical core made of steel lamination with slots to hold the wires for its 3-phase windings which are evenly spaced at 120 electrical degrees apart and connected in a 'Y' configuration.

Types of Rotors - Different types of Rotors and their ...

Jul 18, 2017· Types of Rotors - Different types of Rotors and their characteristics The rotor is a moving component of an electromagnetic system in the electric motor, electric generator, or alternator.

Electrical Machines II 3 Synchronous Generator Operation 3 ...

Electrical Machines II Prof. Krishna Vasudevan, Prof. G. Sridhara Rao, Prof. P. Sasidhara Rao 3 Synchronous Generator Operation 3.1 Cylindrical Rotor Machine Ixa xa xl ra Ixl I Et E Ira V V Load A Et E I σ (a) (b)phasor diagram for R load xs ra I Et IZs IXs Zs …

The issues of multiple-pole cylindrical rotor synchronous ...

The issues of multiple-pole cylindrical rotor synchronous machine excitation winding Conference Paper (PDF Available) · September 2013 with 199 Reads DOI: 10.1109/EPE.2013.6631790

Construction of Alternator | Electrical4U

The machines are built in a number of ratings from 10 MVA to over 1500 MVA. The cylindrical rotor type machine has a uniform length in all directions, giving a cylindrical shape to the rotor thus providing uniform flux cutting in all directions.

Synchronous Machines - hcmut.edu.vn

5.2 Synchronous-Machine Inductances; Equivalent Circuits 249 -~-U a Magnetic axis i a of rotor c cot + 0 o 1 f'~J2 ] Magnetic axis ~c/ ofphasea I --U a Figure 5.2 Schematic diagram of a two-pole, three-phase cylindrical- rotor synchronous machine. the currents are shown by dots and crosses.

3 Synchronous Generator Operation - NPTEL

3 Synchronous Generator Operation ... cylindrical rotor (non-salient pole) machine. This was so as the procedure followed therein ... This explains why the application of cylindrical-rotor theory to salient-pole machines for predicting the performance gives results not conforming to the performance obtained from an actual test.

What is cylindrical rotor machine - answers.com

ok actually i am looking for the answer also but this is what i have got so far,you can understand cylindrical rotor in comparison to Salient pole machines.

Electrical Machines Questions and Answers – Elementary ...

This set of Electrical Machines Multiple Choice Questions & Answers (MCQs) focuses on "Elementary Synchronous Machines". 1. Consider a single phase synchronous machine of cylindrical rotor type.

Salient pole rotor vs. non-salient pole rotor ...

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.

Power Angle Characteristics of Synchronous Machines ...

A 3 phase 400V cylindrical rotor is running at 1500rpm. Suddenly the field excitation zero. Then the net reluctance power is a) 0 b) sin 2d c) cos d ... The phasor addition of stator and rotor mmfs in a cylindrical rotor synchronous machine, is possible because a) mmfs are rotating in opposite direction b) mmfs are rotating in same direction at ...

Electrical Machines - Synchronous Generator Field

Machines with cylindrical rotors are typically found in higher speed higher power applications such as turbogenerators. Using 2 or 4 poles, these machines rotate at 3600 or 1800 rpm (with 60hz systems). Remember that machine power is a function of the size of the machine.

Rotor Pole - an overview | ScienceDirect Topics

The rotor poles of an EEDD machine can be salient or cylindrical, the former being most commonly used. In all cases, the rotor poles of the EEDD generator must be large enough to provide adequate space for the excitation windings.

Synchronous Machine Model and Its Basics - EEEGUIDE

Synchronous Machine Model and Its Basics – As stated above the cylindrical-rotor synchronous machine offers constant permeance to mmf waves irrespective of the mechanical position of the rotor and is, therefore, simpler to model. Figure 8.1 shows the cross-sectional view of a 2-pole* cylindrical-rotor synchronous machine.

synchronous - Salient pole vs cylindrical rotor ...

Why is the salient pole rotor in a synchronous machine made of laminated steel whereas a cylindrical rotor does not have any lamination? Stack Exchange Network. Stack Exchange network consists of 175 Q&A communities including Stack Overflow, ... Salient pole vs cylindrical rotor. Ask Question 0

6.061 Class Notes, Chapter 9: Synchronous Machine and ...

The 'machine' consists of a cylindrical rotor and a cylindrical stator which are coaxial and which have sinusoidal current distributions on their surfaces: the outer surface of the rotor …

IV. Principles of rotating machines - Hacettepe University

IV. Principles of rotating machines ... Elementary two-pole cylindrical-rotor field winding. 3 Types of Rotating Machines The field & the armature sides can be placed on the stator or rotor sides depending on the machine type: (a) DC machines (rotor is cylindrical, stator is salient-pole) – Field is on stator

Constrution of Synchronous Generator (Stator and Rotor ...

Constrution of Synchronous Generator (Stator and Rotor) ... The Fig. 3 shows smooth cylindrical type of rotor. Fig. 3 Smooth cylindrical rotor: ... The poles are not projecting out and the surface of the rotor is smooth which maintains uniform air gap between stator and the rotor. These rotors have small diameters and large axial lengths.

Chapter 6. Synchronous Machines - Educypedia

Synchronous Machines 6 where w is the angular frequency of emf in electrical radians per second and wm the angular speed of the rotor in mechanical radians per second. When w and wm are converted into cycles per second or Hz and revolutions per minute respectively, we have

Difference between Salient Pole and Non Salient Pole ...

May 01, 2018· Explained the difference between Salient Pole and Non Salient Pole rotor | compare salient pole and cylindrical rotor | difference between salient pole and cylindrical pole machine | difference ...

Difference between Cylindrical and Salient Pole Rotor ...

The main difference between the Cylindrical Rotor and Salient Pole classes of machine lies in the rotor construction. The cylindrical rotor type has a uniformly cylindrical rotor that carries its excitation winding distributed over a number of slots around its periphery.

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* Synchronous Machines Salient-pole synchronous machine Cylindrical or round-rotor synchronous machine Most hydraulic turbines have to turn at low speeds (between 50 and 300 r/min) A large number of poles are required on the rotor Hydrogenerator Turbine Hydro (water) D » 10 m Non-uniform air-gap N S S N d-axis q-axis Salient-Pole Synchronous ...

The Synchronous Machine - University of Colorado Boulder

5 rotor leads the stator rotating field. It should be noted that the above equations and Fig. 4 are valid for a cylindrical rotor machine, in which the length of the air gap is uniform.

Why cylindrical type rotor is not laminated in synchronas ...

Lamination is done in any machine to reduce the effect of eddy current loss. Eddy Current can be induced within nearby stationary conductors by a time-varying magnetic field created by an AC source only(Not DC ).. Since Rotor of the cylindrical synchronous machine is excited by DC supply,so the rotor …

What do yo call the machine that turns rotors - answers.com

In cylindrical rot … or, as it rotates, the air gap between the rotor and stator doesnt change due to its cylindrical shape, but for salient pole machine, due to its shap, the air gap changes as ...

II. Synchronous Generators

According to the shape of the field, synchronous machines may be classified as cylindrical-rotor (non-salient pole) machines and salient-pole machines. ... • Cylindrical rotor alternators are usually long, and the problem of air f low requires very special attention.

Theory of cylindrical rotor machine ~ your electrical home

Note : With increase in δ power increases and with decrease in δ power decreases.Power in case of synchronous machines depends on the angle δ.This angle δ is called power angle.

DE102012218993A1 - Cylindrical rotor for permanent magnet ...

Cylindrical rotor for permanent magnet-excited electric machine, has permanent magnet comprising partial magnets and arranged between pole shoes, where one of partial magnets has higher coercive force than another partial magnet

Salient Pole and Non Salient Pole Synchronous Machine

Here i will discuss the difference between Salient Pole and Non Salient Pole Synchronous Machine Non salient pole rotor are cylindrical in shape.nuclear,gas