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Application of the Rotor Field-Oriented Control for an Induction Motor Used in Electric Traction

In this paper, the rotor field-oriented control is applied for a three-phase induction motor used in electric traction of an autonomous locomotive powered by a battery. First, the operating equations in the rotor field-oriented system are introduced. Then, the control scheme based on the structural scheme and operational equations are pre-sented. After referring to the design of the controllers, the performances of the control system during the start-up pro-cess by prescribing a ramp speed and step rotor flux are addressed and analyzed. Four values of the prescribed speed are taken into consideration. Through the presented results, the synthesis of the control system and control algorithm are validated.