Prof. Eng. Sergiu IVANOV, PhD
Rezumat
In actionarile grele (sute de kW), inca sunt utilizate motoarele asincrone cu rotor bobinat. In ciuda simplitatii
reglarii vitezei pe caracteristici reostatice, pierderile importante aferente metodei, mai ales la viteze mici, fac ca facilitate sa fie utilizata doar pentru pornire. Chiar si asa, pierderile in rezistoarele suplimentare sunt importante. Articolul propune o metoda de pornire care nu mai apeleaza la rezistoare aditionale si deci, elimina pierderile corespunzatoare. Simularile
confirma viabilitatea metodei.
Cuvinte cheie: motor asincronrotor bobinatdubla alimentarepornire
Abstract
In heavy duty drives (hundreds of kW), wound rotor induction motors are still used. Despite their simple
capability to easily operate at variable speed, the large amount of losses which occur at low speeds determine the users to use the facility given by the wound rotor only for starting. Even so, the losses specific to the additional rotor resistors are
quite important. The paper proposes a technique for starting which avoids the use of additional rotor resistors and
consequently it eliminates the corresponding losses. The simulations confirm the viability of the technique.
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