Research on the design of multi-redundancy BLDC motor

In order to improve the reliability of the system, the redundancy technology is introduced into the design of permanent magnetic brushless DC motor. Two kinds of stator structures are designed, including same slot and different slot. The mathematical model of the motor are set up, the winding inductance are analyzed and calculated, and the relationship between the winding inductance and mutual inductance are deduced. According to the mathematical model, the parameters of the motor are designed, and the rotational speed and torque are simulated. The motor are tested based on the magtrol testing system, compared the mechanical characteristic curve of the two kinds under different working modes. The experiment results show that: the motor of two kinds can achieve good dynamic characteristics, and the torque is twice with two sets of windings. Two sets of windings did not affect motor performance, but it greatly improved the system reliability.