The balanced control of dual-redundancy brushless DC motor servo system

In this paper, a Dual-Redundancy Brushless DC Motor (DR-BLDCM) servo system is introduced. To achieve a performance of fast response and high tracking accuracy, we adopt a hybrid PI controller with incomplete feed-forward compensation for position loop. The characteristics of the torque and power loss are analyzed under the unbalanced operations. Also, the reasons and effects of unbalanced operations are studied thoroughly. An effective balance control method is proposed to get a good performance even with obviously unbalanced conditions. Finally the relevant simulation results are given under MATLAB/Simulink environment and it verifies the validity of our method.