Generator for Alternative Power Engineering with a Reduced Starting Resistive Torque

12th International Scientific Conference "Engineering for Rural Development": Proceedings. Vol.12 2013
Aleksandrs Gasparjans, Marija Hramcova, Aleksandrs Terebkovs, Anastasija Žiravecka

A construction of a contact-less inductor electric machine with improved starting and regulation characteristics is suggested. Nowadays the multi-pole contact-less generators of disk construction with the permanent magnet excitation are more applied in small hydro- and wind power engineering. Simple construction, small sizes, low angular velocity give an opportunity to install them on same shaft with the turbine without any kind of gear either chain or V-belt gear. The generators of such construction have also some disadvantages. Particularly, they have an effect of "magnetic sealing". This complicates the beginning of the driving mechanism rotation and further acceleration to the rated number of turns. For the elimination of this effect and improvement of the starting characteristics a construction of generator is suggested with a variable air gap the value of which is regulated by means of centrifugal regulator. With this purpose a part of magnetic circuit is made movable. With an unmovable rotor and low angular velocity the air gap is of maximum value. The magnetic flux linkage and generator have an insignificant starting resistive torque. With the increasing of angular rotating frequency the magnetic system of the rotor is moving along the rotation axis being influenced by the force of the centrifugal regulator. With this the air gap is decreased, magnetic flux linkage increases and generator starts to recuperate electric energy. With the decreasing of the angular velocity under the influence of return spring the rotor magnetic system returns to the initial state. The centrifugal regulator of the air gap value is a constructive part of the rotor magnetic circuit of the machine.

Atslēgas vārdi
contact-less inductor electric machine ; permanent magnet excitation; generators of disk construction
Hipersaite
http://tf.llu.lv/conference/proceedings2013/Papers/079_Gasparjans_A.pdf

Gasparjans, A., Hramcova, M., Terebkovs, A., Žiravecka, A. Generator for Alternative Power Engineering with a Reduced Starting Resistive Torque. No: 12th International Scientific Conference "Engineering for Rural Development": Proceedings. Vol.12, Latvija, Jelgava, 23.-24. maijs, 2013. Jelgava: Latvian University of Agriculture, 2013, 429.-434.lpp. ISSN 1691-5976.

Publikācijas valoda
English (en)