Induction motor control using load profiling measurement and processing

The paper describes development of an industrial grade prototype for an induction motor control system. Specifically the project looks at detecting unexpected increases in motor load, and developing circuitry that will react appropriately before any damage is caused. An increase in load is detected by tracking motor angular velocity using Hall effect sensors. A microcontroller filters the speed measurements to reduce noise, and uses a clipping integrator on the thresholded speed to reject outliers. Experimental work was undertaken to develop the control strategies and to ensure the prototype was operating as required