A Robust Field Orientation Control Method for Induction Motor Drives

The performance of the induction motor (IM) control system under the conventional rotor-flux-oriented (RFO) scheme may greatly deteriorate in the presence of parameter mismatch. To address this problem, first, the motor parameters sensitivity of two different field orientation methods are analyzed. Then, a modified field orientation method, which combines the advantages of the two different field orientation methods, is presented. Compared with the conventional scheme, the proposed induction motor control scheme guarantees the robustness of the system against leakage inductance mismatch across the full load range, leading to static and dynamic high-speed performance improvement. Finally, the effectiveness of the proposed method is verified by simulations and experiments.