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Induction motor dq model4/11/2023 ![]() The objective of field oriented control (FOC) in this work is to control the semiconductor switches in the machine-side power inverter to achieve the desired torque and flux. ![]() The DC voltage is converted back into AC through a machine-side inverter, which drives the motor with time-varying loud. The 3-phase voltage from the grid is converted to DC through a transformer and a grid-side rectifier. This work develops an auto-tuning PI speed controller for 3-phase permanent-magnet synchronous motors using field oriented algorithm. A controller is required to maintain a consistent speed and improve system performance as the load changes. Without or with the load torque, the proportional integral (PI) controller produced better results in the speed control loop. To achieve optimum torque per amp, we retain the angle of the stator-currentvector with respect to the rotor-flux at 90 degrees, rather than controlling the amplitude of the stator-current-vector.
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