عنوان المقالة:An Improved Sliding Mode Observer for Speed Sensorless Direct Torque Control of PMSM Drive with a Three-Level NPC Inverter Based Speed and Stator Resistance Estimator
A. Ameur, Mokhtari, B., Mokrani, L., Azoui, b., Essounbouli, N. , Hamzaoui, A
الملخص العربي
This paper presents a sensorless Direct Torque Control (DTC) methods for permanent magnet synchronous motors (PMSM) supplied by three-level Neutral-Point-Clamped (NPC) inverter based on the sliding mode observe (SMO). The stability is verified by Lyapunov theory. The SMO is utilized to compensate the effects of parameter variation on the stator resistance, which makes flux and torque estimation more accurate and insensitive to parameter variation. In classical DTC, due to the hysteresis based scheme, the switching frequency is variable, current distortion and torque ripple are more important. In order to obtain a constant switching frequency and hence torque ripple minimization, we introduce a new control technique for PMSM using a three-level NPC inverter. Simulation results confirm the effectiveness of the proposed method.
مختاري البشير | MOKHTARI BACHIR | 4335