Naslov
The Effect of Stator Clamping Plate Design on End Region Power Losses of Vertical Hydro Generators

Autori
Poljančić, V. ; Brčić, M. ; Petrinić, Miroslav

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), stručni

Izvornik
Study Committee A1 “Rotating Electrical Machines" : Meeting and Colloquium “Rotating Electrical Machines: Requirements, Operation & Maintenance”, September 6th-11th, 2015 Madrid, Spain / - Madrid : CIGRÉ, 2015, 1-10

ISBN
000-0-00000-000-0

Skup
Study Committee A1 “Rotating Electrical Machines" : Meeting and Colloquium “Rotating Electrical Machines: Requirements, Operation & Maintenance”, September 6th-11th, 2015 Madrid, Spain

Mjesto i datum
Madrid, Španjolska, 06.09.2015. - 11.09.2015

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Hydro generator, clamping plate, losses, magnetic and non-magnetic materials

Sažetak
Magnetic flux of operating generator passes through active machine region, but also penetrates nearby mechanical parts. Clamping plates and finger plates that are used to tighten stator metal sheets are situated in such regions, and are inevitably exposed to magnetic field. That is why losses are also generated in these parts of electric machine. This paper describes practical problems related to clamping plates design and offers methods that can be used to reduce unwanted losses. Measurement of clamping plate losses on a real generator is difficult as it is hard to distinguish and separate these losses from total losses. That is the reason why in this paper losses analysis is done using finite element method calculations. By use of three dimensional generator model, comparison of losses was conducted for clamping plates made from magnetic material, nonmagnetic material and magnetic material shielded by copper screen. Results show that by use of nonmagnetic materials clamping plates losses can be minimized by a factor up to ten, while metal screen can reduce losses up to 30 %.

Izvorni jezik
Engleski

Znanstvena područja
Elektrotehnika

POVEZANOST RADA