Direct Torque Control Of Iduction Motor Implementation Based Fpga Fed Three Level Inverter
Résumé: This thesis presents the implementation of Direct Torque Control (DTC) of induction machine utilizing FPGA to handle the issue of controlling the induction motor, since it is considered as one of the most difficult system to control because of its nonlinearity. Therefore, the direct torque control is principally a non-linear control in which the inverter switching states are imposed through a separate control of stator flux and electromagnetic torque of the motor. Furthermore, a Direct Torque Control (DTC) has become a popular technique for the control of induction motor drives as it provides fast dynamic torque response and robustness to machine parameter variations. Hysteresis band control is one of the simplest and most popular technique used in DTC of induction motor drives. Moreover, it is based on measuring the currents and voltages on the motor, and there are no mechanical sensors to estimate the instantaneous values of electromagnetic torque and stator flux. Afterward, they will be compared to the two adjustable references. And it is directly possible to reduce torque and flux errors by using inverter states.
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