REDUCTION OF THE STARTING LOSSES FOR THE WOUND ROTOR INDUCTION MOTOR

Autor/autori: 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 asincron, rotor bobinat, dubla alimentare, pornire


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.

Keywords: induction motor, wound rotor, doubly fed, starting

 

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