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The generator rotor air outlet changes color

Generator Cooling Fan Vibrational Problems: A Design and

This project covers certain types of rotor generator vibrational problem, including both conventionally-cooled (indirect copper cooling) windings and direct. cooled copper windings as

Finite Element Analysis of Turbine Generator Rotor Winding

stalled air-gap ﬂux probes is a well-established technology to de-termine the presence of shorted turns in a turbine generator rotor winding. Flux measurements are normally performed using

VENTILATION AIR FLOW FIELD CHARACTERISTICS IN A HYDRO GENERATOR

the extremities of the rotor. The air flows axially through the rotor-stator air gap before entering the stator ventilation channels. In the case of radial cooling, the rotor is also used as a radial fan.

Investigating the possibility of increasing cooling air flow in a

The outer diameter of the rotor is 8.64 m and the height of it is 1.8 m. The rotor possesses 32 poles. The air gap between the rotor and the stator is 25 mm and the rotation speed of the

Generator Not Putting Out Correct Voltage

Worn rotor shaft bearing. If you observe noise and terminal voltage instability, it could indicate excessive wear on the rotor shaft bearing, leading to changes in the air gap between the stator and rotor windings. The

Full surface heat transfer characteristics of rotor ventilation duct of

Hribernik et al. [4] carried out an investigation into the malfunction of a 10 MW hydro-generator''s air-cooling system. Mayle et al. [5] studied about rotating flow in an air gap

Integrated Generator Rotor and Stator Winding Condition Monitoring

Integrated Generator Rotor and Stator Winding Condition Monitoring Middle East Rotating Machinery Technology & Innovation Conference C. Chan M. Sasic G.C. Stone a stator

The top view of generator rotor and four air gap

One of the most important parameters of powerful hydro generators (HG) is the air gap between the rotor and the stator, and its deviation from the set norms is a defect that can lead to serious...

Air inlet/outlet arrangement for rotor cooling application of axial

Page 5 of 25 first cell distance. This is based on a speed of 6000rpm which is equivalent to the local Reynolds number, Reθ of 5.96e 5 calculated by (1): (1) . Where ω is the rotor angular

"Generator Field Winding Shorted Turns: Moisture Effects"

When a generator trips and rotor speed decreases, the centrifugal forces that hold the end turns in a compact package decrease dramatically. At low speed, gaps between the copper winding

Application & Installation Guide Generator Systems

The symmetrical design of the generator ensures that the rotor poles extend over equal arcs and that the magnetic flux density distribution is similar across all stator windings. Magnetic poles

Identification of Geometry and Dynamic Properties of Hydro

dynamics of the rotor. Identification of the air gap, which is described in the article, is based on defining and measuring the shape of stator, and the rotor within the stator, in order to

Integrated generator rotor and stator winding condition monitoring

Sensors installed within the generator enclosure or in the air exhaust can continuously measure ozone concentration. Care must be taken when evaluating concentration levels, as generator

Advancements in Integrated Generator Rotor and

Integrating multiple monitoring technologies provides the benefit of not only detecting subtle changes in the generator early enough to prevent lost production, but increasing the confidence of the generator condition

Generator Rotor Thermal Sensitivity — Theory and Experience

Generator rotor thermal sensitivity is a phe-nomenon which may occur on the generator rotor causing the rotor vibration to change as the field current is increased. This has occurred on

Study on the suppression effect of variable hydrogen

As seen in Figure 3, due to the special shape of the slot wedges in the inlet and outlet wind zones, the cooling gas in the air gap is sucked into the inlet wedges by the rotating rotor and enters two diagonal flow air ducts in the

Ventilation system with skewed rotor cooling ducts of

This paper describes modified ventilation system and thermal analysis of low-power 40-MW turbo generator. The study compares thermal behaviour of the machine for three different arrangements of the rotor

Advancements in Integrated Generator Rotor and

Care must be taken when evaluating concentration levels as generator operating voltage, air humidity, and power factor will affect the ozone produced by a stator winding [1]. Integrating multiple monitoring

GE Generator Rotor Design, Operational Issues, and

The generator rotor and stator incorporated inlet and outlet sections along their axial lengths to achieve uniform cooling along the length of the generator field. This uniform cooling eliminated axial hotspots and allowed the ratings of the

Study of Local Structural Changes on Air Cooling at the End of Rotor

PDF | On Jan 1, 2022, Yanliang Qiu and others published Study of Local Structural Changes on Air Cooling at the End of Rotor Windings for Variable Speed Pumped Storage Generator

Study of Local Structural Changes on Air Cooling at the End of Rotor

Study of Local Structural Changes on Air Cooling at the End of Rotor Windings for Variable Speed Pumped Storage Generator-Motor. Yanliang Qiu 1,2, Bin Xiong 1,2, Zhe Hou 1,2,*, Lin Luo 3.

The generator rotor air outlet changes color [PDF]

6 FAQs about [The generator rotor air outlet changes color]

What causes a generator rotor to degrade?

One component of the generator that is typically refurbished, upgraded or uprated is the generator rotor (field). Degradation of the generator field can be caused by a number of factors, including a breakdown in insulation due to time and tem-perature and mechanical wear.

What factors affect a generator rotor?

There are a number of other concerns that also affect generator rotors. Thermal sensitivity is the term used to describe an excessive vibration of the generator rotor, induced by the heating effect of the field cur-rent. As field current flows in the winding, the copper heats up. Two things happen as a con-sequence:

How does a generator rotor and stator work?

The generator rotor and stator incorporated inlet and outlet sections along their axial lengths to achieve uniform cooling along the length of the generator field. This uniform cooling elim-inated axial hotspots and allowed the ratings of the generators to be increased.

Can a generator rotor be changed?

Many options are available to the user in which the rotor can be restored to the original condition, modified to present day design condition or replaced with a new, upgraded design. Modifying or replacing the generator rotors also gives the user the possibility of uprating the generator. Q. What is the typical lifespan of a genera-tor rotor?

What are the components of a generator rotor?

the size and life of generator rotors are temperature, mechanical force and electrical insulation. typical generator field. Note the major components: rework or modifications is also discussed. This There are, of course, variations on this configuration. For example, while the illustrated design uses radial fans, other designs use axial fans.

What causes a generator rotor insulation breakdown?

What are the most common causes of a generator rotor insulation breakdown? A. The degradation in insulation is caused and/or operating incidents. A breakdown in the insulation will cause shorted turns between conductors or a the field forging or retaining ring.

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