Design and research on electrical/mechanical hybrid four-redundancy Brushless DC Motor system

Redundancy structure is widely adopted by motors in aircrafts and special vehicles with rigorous reliability requirements. This paper presents an electrical/mechanical hybrid four-redundancy brushless DC motor (BLDCM) and the corresponding driving control system. High reliability can be achieved by adopting the electrical/mechanical hybrid structure. An engineering prototype is designed and developed whereas the reliability of the BLDCM is analyzed theoretically. Moreover the control and driving system is designed to compose a position servo. Experimental results are presented to demonstrate the feasibility and performance of the electrical/mechanical hybrid four-redundancy BLDCM.