Sensorless Field Oriented Control of 3Phase （无传感器磁场定向控制3个阶段）.pdfVIP

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Sensorless Field Oriented Control of 3Phase （无传感器磁场定向控制3个阶段）.pdf

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Sensorless Field Oriented Control of 3Phase （无传感器磁场定向控制3个阶段）

Application Report SPRABQ0– October 2013 Sensorless Field Oriented Control of 3-Phase Induction Motors Using F2833x Manish Bhardwaj ABSTRACT This application report presents a solution to control an AC induction motor using floating point TMS320F2833x microcontrollers. TMS320F2833x devices are part of the family of C2000™ microcontrollers which enable cost-effective design of intelligent controllers for three phase motors by reducing the system components and increase efficiency. With these devices it is possible to realize far more precise digital vector control algorithms like Field Orientated Control (FOC). This algorithm’s implementation is discussed in this document using TI’s Digital Motor Control (DMC) Library. 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 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. A configuration for TMS320F2803x, which is a fixed point microcontroller, is available in the project to highlight this. This application report covers the following: