%0 Journal Article %T Optimal Sensorless Four Switch Direct Power Control of BLDC Motor %J Journal of Operation and Automation in Power Engineering %I University of Mohaghegh Ardabili %Z 2322-4576 %A Hajiaghasi, S. %A Rafiee, Z. %A Salemnia, A. %A Aghamohammadi, M. R. %D 2019 %\ 05/01/2019 %V 7 %N 1 %P 78-89 %! Optimal Sensorless Four Switch Direct Power Control of BLDC Motor %K Brushless DC motor %K Direct power control %K Four-switch inverter %K Sensorless %K Torque ripple %R 10.22098/joape.2019.4859.1374 %X Brushless DC (BLDC) motors are used in a wide range of applications due to their high efficiency and high power density. In this paper, sensorless four-switch direct power control (DPC) method with the sector to sector commutations ripple minimization for BLDC motor control is proposed. The main features of the proposed DPC method are: (1) fast dynamic response (2) easy implementation (3) use of power feedback for motor control that is much easy to implement (4) eliminating the torque dips during sector-to sector commutations. For controlling the motor speed, a position sensorless method is used enhancing drive reliability. For reference speed tracking, a PI control is also designed and tuned based on imperialist competition algorithm (ICA) that reduces reference tracking error. The feasibility of the proposed control method is developed and analyzed by MATLAB/SIMULINK®. Simulation results prove high performance exhibited by the proposed DPC strategy. %U https://joape.uma.ac.ir/article_743_217f220d7d098f0c4504c065ce78cfd8.pdf