electrical shaft that use wound rotor induction motors

[hakla]

i continue to ask about electrical shaft ,which use wound rotor induction motors to get them work with speed synchronization,( the theme upon the scientists jordan and ungru have worked) so i'm interested by the latest work upon it , and in which drives is finding aplication actualy.it apears to me that only few reseachers work upon this theme , lately i have found, searching by the site google and typing electrical shaft ,one who work on this theme on the rolling mills,his name is mr GEORGE LAMPE ,but i could not have contact with him ,so i continue wait for the help of eng-tips.
with regards

 

[jbartos]

Suggestion: Reference:
A novel double-circuit-rotor balanced induction motor for improved slip-energy recovery drive performance. I. Modeling and simulation
- Zakaria, W.S. Alwash, S.R. Shaltout, A.A.
United Arab Emirates Univ., El-Ain, United Arab Emirates
This paper appears in: Energy Conversion, IEEE Transaction on
On page(s): 556 - 562
Sept. 1996
Volume: 11 Issue: 3
ISSN: 0885-8969
References Cited: 7
CODEN: ITCNE4
INSPEC Accession Number: 5396144

 

[gjones33]

What is an electrical shaft>

 

[jbartos]

Suggestion: Reference:
Regenerative drives in the megawatt range for high-performance downhill belt conveyors
- Rodriguez, J. Pontt, J. Becker, N. Weinstein, A.
Dept. of Electron., Univ. Tecnica Federico Santa Maria, Valparaiso, Chile
This paper appears in: Industry Applications, IEEE Transactions on
On page(s): 203 - 210
Jan.-Feb. 2002
Volume: 38 Issue: 1
ISSN: 0093-9994
References Cited: 11
CODEN: ITIACR
INSPEC Accession Number: 7180253 Abstract:
Downhill transport of ore from the mine to the beneficiation plant by means of belt conveyors introduces important advantages both for the personnel and for the equipment. Furthermore, if the conveyor is equipped with a regenerative AC drive, the system will generate an important amount of electrical energy for use in the process. This paper discusses the technical alternatives and the criteria used to select a solution, using modern converter-inverter drives in the megawatt and medium-voltage range. The considered drive alternatives are: (1) an AC wound-rotor induction motor drive with additional resistors; (2) an AC synchronous motor with cycloconverter; (3) an AC induction motor with current-source inverter; and (4) an induction motor with multilevel voltage-source inverter. The study reveals that, considering the main technical criteria, the use of a three-level active front end feeding a voltage-source three-level inverter is the most appropriate alternative.

 

[electricuwe]

To jbartos:

I just read the paper you recommended in your second post dated May 19. I cannot see how it could be helpful to hakla ? The drive system descibed there doesn't use an electrical shaft arrangement.

To all:

The basic elements of the "classic" electrical shaft arrangement are:

Two shafts, each coupled to to the load at different locations and each coupled to a main drive motor (Induction motor or DC motor) and an auxillary wound rotor induction motor. The two wound rotor induction motors are paralled on the stator side as well as on the rotor side.

To hakla:
I guess it will be difficult to find recent literature on that arrangement since nowadays most engineers will use two VSDs, set up and approbiately connected on the control side, for that task.
I could only find two references on that topic:
Fischer, Rolf: Elektrische Maschinen, München 1983 p. 243-244
Pflügel, K.: Gleichlauf von Antrieben duch elektrische Wellen, BBC-Nachrichten, Bd. 42, 1960, S420-428
I guess the second one should also be available in english in the englisch version of the journal published by BBC.

 

[hakla]

to electricuwe:
i've read about rolling mills the drive ,as i have understood ,that use the electrical shaft here are what he write:in large rolling mills where the shaft between the master drive and slave drive can be 30 meters or longer ,mechanical shafts are increasingly being replaced by electrical shafts ..and so on ,the article was writen by george lampe using the dspace as tool to get simulation ,by google.com and typing electrical shaft u can find this topic ...so is it other electrical shaft or the very one that i'm looking for
regards

 

[jbartos]

Suggestion: The second posting paper figure 1 shows two induction motors tied to a drum. Although, it is not explicitly rolling mills application, the drum may have its interpretation in terms of the rolling mills.
The first posting is also not directly related to the rolling mills electrical shafts. It just focuses on the wound rotor induction motor theory, which may be a helpful start.

 

[jbartos]

Suggestion: Although not directly related to large rolling mills, it addresses the electric shaft:
A static "quasi electric shaft" for n similar rotor winding induction motors
- Fuentes, R.
Dept. de Electr. Eng., Univ. Tecnica Fed. de Santa Maria, Brazil
This paper appears in: Industry Applications Conference, 2000. Conference Record of the 2000 IEEE
On page(s): 1632 - 1639 vol.3
8-12 Oct. 2000
Rome, Italy
2000
Volume: 3
ISBN: 0-7803-6401-5
IEEE Catalog Number: 00CH37129
Number of Pages: 5 vol. xliii+3520
References Cited: 6
INSPEC Accession Number: 6838980 Abstract:
In this paper, a regenerative "static electric shaft " topology is presented. This drive is valid for any number of identical motors that have similar mechanical loads. Under this condition, the drive is very stable and motors operate at very similar speeds. Under unbalanced mechanical load, speeds are different, but these differences are mitigated by the effect of a bridge controlled inverter that regenerates active power to the AC lines, as in the well known subsynchronous cascade. This means a high efficient drive. Speed can be regulated through the inverter firing angle. Some preliminary results are shown. This drive is very attractive for those variable speed cases which require a great deal of motors with similar loads, like fans in a tank house of a electrowinning copper plants.

 

[electricuwe]

hakla,

I just had a look on Georg Lampes paper you have mentioned:

This arrangement uses two squirrel cage induction motors (not wound rotor motors) and two inverters with a special control arrangement. That's the state of the art arrangement for that purpose.

 

[jbartos]

Suggestion: Visit

http://www.dspaceinc.com/Download/PDFFiles/mannesma.pdf

for more info and discuss the state of the art with Georg Lampe directly.

 

[jbartos]

Small encore: Visit

http://www.ns.ac.yu/prez/bibliografija/8-ee1995.pdf

for
M. Stojiæ
S. Vukosaviæ
Ð. Stojiæ
Projektovanje digitalno upravljanih pogona spregnutih elektriènom osovinom
DESIGN OF DIGITALLY CONTROLLED DRIVES COUPLED BY AN ELECTRICAL
SHAFT

 

[hakla]

ok.i'm hakla ,all publications and works that i have seen(that you have advised me)
wasn't in interest to me ,save one that unfortunately i could not have it because was a conference record : A static "quasi electric shaft" for n similar rotor winding induction motors
- Fuentes, R.
Dept. de Electr. Eng., Univ. Tecnica Fed. de Santa Maria, Brazil
This paper appears in: Industry Applications Conference, 2000. Conference Record of the 2000 IEEE
On page(s): 1632 - 1639 vol.3
8-12 Oct. 2000
Rome, Italy
2000
Volume: 3
ISBN: 0-7803-6401-5
IEEE Catalog Number: 00CH37129
Number of Pages: 5 vol. xliii+3520
References Cited: 6
INSPEC Accession Number: 6838980 Abstract...
so if anyone can have it so it will be kind to post me it and if there is another work on the same item... too.
with regards

 

[jbartos]

Suggestion: Contact

http://www.ieee.org

for instructions where to obtain a copy of the article. It may cost you about $10US or so, and they will fax it to you.