Direct Torque Control Based on Permanent Magnet Synchronous Motor

Direct Torque Control (DTC) methodology for Permanent Magnet Synchronous Motors (PMSM) enables precise regulation of motor torque and rotational speed. This approach leverages the inherent characteristics of PMSM, where the controller manipulates both magnitude and direction of stator winding currents to achieve dynamic torque and speed control. The implementation typically involves real-time flux and torque estimation algorithms, hysteresis comparators for bang-bang control, and switching table-based voltage vector selection. Key advantages include rapid dynamic response (achievable within microseconds), high torque precision (typically within ±5% error margin), and superior efficiency (reducing switching losses by 15-20% compared to PWM methods). This control strategy finds extensive applications in industrial automation, electric vehicle propulsion, and precision motion control systems due to its robustness against parameter variations and simplified computational requirements.