CS263061B1

CS263061B1 - Rotor of electric current generator with permanent magnets,esp. for wind-power plant

Info

Publication number: CS263061B1
Application number: CS876234A
Authority: CS
Inventors: Jaroslav Ing Rakus; Zdenko Stanicek; Ladislav Doc Ing Csc Strakos
Original assignee: Rakus Jaroslav; Zdenko Stanicek; Strakos Ladislav
Priority date: 1987-08-26
Filing date: 1987-08-26
Publication date: 1989-04-14
Also published as: CS623487A1

Abstract

Řešení ae týká rotoru generátoru elektrického proudu o permanentními magnety, u něhož permanentní magnety jsou uloženy v rotorových drážkách rotorových plechů ve stejijérn odstupu v obvodovém směru rotoru. Účelem je zejména zajištění usnadnění razběhu generátorů snížením jejich rozběhového momentu při možné vypuštění rozběhové spojky mezi rotorem generátoru a rychloběžnou vrtulí malé větrné elektrárny. Uvedeného účelu ee dosáhne tím, že rotorové drážky mají osu otevření drážky posunutou ve stejném směru nejméně o polovinu drážková rozteče statorových drážek vůči ose rotorové drážky, přičemž polovina rotorových plechů je obrácena vůči ostatním rotorovým plechům.The solution ae relates to the generator rotor electric current by permanent magnets, where permanent magnets are stored in rotor rotor grooves sheets in uniform circumferential spacing direction of the rotor. In particular, the purpose is to secure facilitating the generation of generators by reducing them starting torque at possible draining starting clutch between generator rotor and high-speed small wind propeller power plant. This purpose is achieved by ee in that the rotor grooves have an opening axis grooves shifted in the same direction at least by half the stator pitch groove the grooves relative to the axis of the rotor groove, wherein half of the rotor plates are reversed against other rotor plates.

Description

corrections in printed inventions

In the printed description of the invention for the author's certificate No. 263 061 (PV 6234-37 »M), the name of the second author is incorrectly printed ·

Correct I EK KO KO... · ./.3γ· 14.3 * 1Θ90 PRESS - Kašková

- 1 - 26) 061

BACKGROUND OF THE INVENTION 1. Field of the Invention The invention relates to a rotor of an electric current generator with manganese magnets, in particular wind power plants, in which the manganese magnets are housed in the rotor grooves of the rotor cans at the same distance in the circumferential direction of the rotor.

In order to facilitate the start-up of the wind power generators, a plurality of permanent magnet assemblies are arranged along the length of the rotor, the magnets of each set being angularly displaced relative to the magnets of the adjacent system. For short generator rotors in wind turbines with high-speed propellers, where it is not possible to arrange several manganese magnets in succession, a start-up clutch is placed between the propeller and generator to start the wind turbine, allowing the propeller to spin and start the wind turbine at low wind speeds. This makes the whole device very complex and its weight increases considerably. There are other disadvantages when using a starting clutch. The clutch also causes the generator generator stator generator to freeze at temperatures close to 0 ° C. If the propeller power plant is firmly coupled to the generator rotor, it is freeze in the generator's air gap permanently under torque and dissipates. However, the starting clutch engages the stationary rotor generator at a certain speed and there is sufficient time to freeze the generator stator; when the starting clutch is closed, the speed is reduced again, the clutch is switched off and the cycle is repeated.

Claims

The aforementioned drawbacks are eliminated in the rotor of the permanent magnet generator according to the invention, in that the rotor grooves have the opening of the rotor groove displaced in the same direction by at least half the groove pitch of the stator grooves with respect to osorotor grooves, with half of the rotor plates being reversed with respect to other rotor plates. Also shown is a reduction in the number of components at the generator shaft free end and an increase in the serviceability of the entire engine part of the wind turbine. In the accompanying drawing, examples of an embodiment of an electric current generator according to the invention are shown. FIG. 3 is an exploded cross-sectional view of the same rotor; FIG. 3 is a view of the expanded rotor of the generator with rotor sheets arranged in two sheet bundles; and FIG. 4 is the same with rotor sheets arranged in three sheet bundles. The rotor 2 of the electric generator is provided with permeable magnets disposed in the rotor grooves 4 of the rotary plates 2 at the same distance from each other in the circumferential direction.

In each rotor plate 1, the rotor grooves 4a of the opening 7 of the rotor groove 4 have been displaced in the same direction by at least half the groove pitch of the stator grooves with respect to the 5th rotor groove 4. The inverted rotor plates 7 are arranged in the first bundle 8 of the rotor plates 2 and the non-inverted rotor plates 7 are arranged in a second bundle 9 of the rotor plates 2 arranged in the rotor 2 of the first bundle 8 of the rotor plates 2.

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