BRUSHLESS MULTIPOLAR INDUCTION WIND GENERATOR

摘要

The invention refers to the scope of electrical engineering, especially to electrical machines, which can be aplied as a generator for wind electric stations.The described induction generator consists of toothed stator 1, primary winding 2 and secondary winding 3, which are placed in the grooves 4 and 5 of the stator and toothed rotor 6, which has no windings on it. The rotor is designed in the way that it enclouses the stator. The sides of the grooves 4 and 5, which belong to conversely located pole extension groups, are parallel. The coil of the primary winding 2 embraces one pole extension 7 per group, but the coil of the secondary winding 3 embraces three pole extensions 7, 8 and 9. The step of the rotor tooth 10 and step of tooth 11 are similair within the limits of one pole extension group 7, 8 and 9 and equals to tz. The tooth step t1 of the pole extensions belonging to the same group equals to t1=2/3tz, but the tooths step t2 belonging to the mixed groups equals to t2=19/6tz. Secondary winding is switched in series with the capacitor 12. The triangle gaps in the tooth help to reduce the saturation in the tooth 10 and 11. The operation of the generator is based on the periodical change of the magnetic flux linkage, when rotor is changing its direction against stator teeth. If the rotation frequency n of the rotor is greater than synchronous rotation frequency n1=60f1/ZR, generator transfers electrical energy to the grid. The above mentioned allows to increase the specific power of the generator and simplifies the manufacturing technology. Taking into account the large number of pole pairs, this generator can be applied for the directly driven wind electric stations.