Direct torque control method for DC drive motor of agricultural harvester

To ensure the stable operation of agricultural harvesters and improve the direct torque control effect of DC drive motors, this study proposes an innovative method for direct torque control of DC drive motors in agricultural harvesters. Firstly, this study conducted an in-depth analysis of the structure of agricultural harvesters and, based on their mechanical characteristics, constructed a digital model of the DC drive motor for agricultural harvesters. Subsequently, this study designed a direct torque control architecture for DC drive motors with direct torque as the control objective. Finally, this study optimized the selection of voltage vectors to achieve more efficient direct torque control design. The experimental results show that after applying the method proposed in this study, the torque ripple of the chive harvester motor is significantly reduced and the waveform becomes smoother in steady-state operation.