Optimal control of permanent-magnet motor for pulsatile axial blood pump applications

The axial blood pump requires the pulsation flow, resulting in difficulty and complexity of the controller. This paper proposed a new control strategy of brushless permanent-magnet (PM) motors. By using software control cycle changes, the motor speed pulsing flow effects is implemented, in which the fuzzy control strategy is adopted. A MATLAB-based simulation model is developed to compare the performance between the proposed control system and the original one. The simulation results show that, compared with the traditional PID method, the proposed drive system has the reduced responding time, good anti-interference ability, and improved dynamic and steady performances. The developed drive system can meet the design requirements and improve the hemo-compatibility.