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This application report presents a solution to control a permanent magnet synchronous motor (PMSM) using the TMS320F2833x floating-point microcontrollers. TMS320F2833x devices are part of the family of C2000 microcontrollers, which enables the cost-effective design of intelligent controllers for three phase motors by reducing system components and increasing efficiency. With these devices, it is possible to realize far more precise digital vector control algorithms like the field orientated control (FOC). This algorithm’s implementation is discussed in this document. The FOC algorithm maintains efficiency in a wide range of speeds and takes into consideration torque changes with transient phases by processing a dynamic model of the motor. Among the solutions proposed are ways to eliminate the phase current sensors and use an observer for speed sensorless control. The Digital Motor Control (DMC) Library uses TI’s IQ math library, which supports both fixed and floating point maths. This makes migrating from floating to fixed-point devices easy.

This application report covers the following: