Design of Torque Controller Based on Field Oriented Control (FOC) Method on BLDC Motor

Abstract

Brushless Direct Current (BLDC) motors have the characteristics of better speed and torque control, high efficiency, and affordable maintenance costs compared to other types of electric motors. BLDC motors require a control system that can produce stable and responsive torque to maximize these advantages. This study discusses torque control with Proportional Integral (PI) control and Field Oriented Control (FOC) method using DSP LaunchPad XL TMS320F28069M. This research simulates the PI control to see the results of the control before it is implemented on the BLDC motor. The simulation results obtained a Kp value of 0.80541 and a Ki of 0.42578. The final result of this study shows a good response with a small overshoot value and steady state error, resulting an output with low ripple, a stable system, and a fast response. The designed control system is capable of tracking torque at I <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">q</inf> 0.3A, 0.6A, and 0.9A setpoints. Sequentially, the settling time values were 0.02ms, 0.06ms, and 0.16ms; the overshoot values were 0.042%, 0.02%, and 0.01%; and the steady state error values for each setpoint were 0.06%, 0.03%, and 0,03%.