Permanent magnet brushless motor field oriented control with dither signal injection

The studies and application of Brushless Motor Field Oriented Control (FOC) with dithering technique was built using real-time test platform in this work. Here, the dither signal was introduced to the system to eliminate the sustained oscillation called limit cycles which usually uncontrollable. To see the system performance, a Serial Communication Interface (SCI) was made to monitoring the digital signal output. The experimental results show the ability of dither injection signal to remove the limit cycles at speed and electromagnetic field.