DESIGN AND FEM-BASED SIM ULATION OF A HIGH-POWER INDUCTION MOTOR WITH SEVERE START-UP CONSTRAINTS

Autor/autori: Assoc. Prof. Eng. Leonard Livadaru, PhD, Prof. Eng. Alecsandru Simion, PhD, Assist. Prof. Eng. Adrian Munteanu, PhD, Eng. Marcian Sandru, Eng. Ovidiu Dabija, PhD Student, Prof. Eng. Margareta Cojan, PhD

Rezumat: Lucrarea prezinta constructia si simularea functionarii unui motor asincron de 630 kW a carui proiectare a luat in consideratie doua conditii restrictive privind regimul de pornire si anume: curent de pornire scazut (Ip/In<3,3) respectiv cuplu de pornire relativ ridicat (Mp/Mn>1). Solutia propusa consta in doua colivii rotorice distincte, una din cupru iar cea de a doua din fier conductor electric. In plus, colivia din cupru are o constructie particulara atat in crestaturi cat si la extremitati. Simularea functionarii foloseste un pachet de programe bazat pe metoda elementului finit.

Cuvinte cheie: motor asincron de putere mare, conditii de pornire speciale, doua colivii rotorice, simulare MEF

Abstract: The paper presents design and simulation of a high-power induction motor of 630 kW which has to fulfill some severe start-up constraints, that is a low starting current (Is/Ir<3.3) and a relatively high pull-up torque (Ts/Tr>1). The proposed solution uses two distinct rotor cages made of copper and conductive iron respectively. Additionally, the copper cage has a particular construction of the bars both inside the slots and at their extremities. The simulation of the operation uses a software package based on finite element method.

Keywords: high power induction motor, start-up constraints, two squirrel cages of distinct materials, FEM simulation

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