Optimal Sensorless Four Switch Direct Power Control of BLDC Motor

• Main Authors: S. Hajiaghasi, Z. Rafiee, A. Salemnia, M. R. Aghamohammadi
• Format: Article
• Language: English
• Published: University of Mohaghegh Ardabili 2019-05-01
• Series: Journal of Operation and Automation in Power Engineering
• Subjects: Brushless DC motor; Direct power control; Four-switch inverter; Sensorless; Torque ripple
• Online Access: http://joape.uma.ac.ir/article_743_217f220d7d098f0c4504c065ce78cfd8.pdf

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.