Development of a Fault-Tolerant Permanent-Magnet Synchronous Motor

Abstract

The failure of the motor or controller of a motor servo system could lead to terrible casualties and property loss in fields such as aviation and transportation. Current research mainly focuses on the algorithm for fault-tolerant control and the topological structure of hardware. Such approaches may reduce the system frequency through the use of a complex algorithm or increase the system cost through the use of special components. The present paper proposes and tests a multi-redundant, permanent-magnet synchronous motor. Through the parallel connection of multiple independent windings and a supporting control method that controls each redundancy separately, the system continues to run even when the winding or controller of one redundancy suffers an open-circuit or short-circuit fault. The system controller is easy to build and minimize without special components and does not require additional algorithms.

Fault-Tolerant Analysis and Design of AFPMSM With Multi-Disc Type Coreless Open-End Winding

“…In addition, it also has the ability of fault isolation and suppression. Consequently, fault-tolerant machines have attracted more attention from experts coming from the fields of aviation, aerospace, electric vehicles, and so on [3].…”

“…Furthermore, the multi-disc AFPMSM with fault tolerance has better electromagnetic thermal physical isolation ability, which can get superior fault tolerance ability during fault working states. According to the requirements of actuator applications, multi-disc AFPMSM has significant overload capacity, which can ensure that the machine can also provide the necessary torque output in a short time after failure [3]. Therefore, the small power fault-tolerant AFPMSM would unleash the potentiality of such machines in actuator.…”

“…Till now, fault-tolerant machines have one of the popular topics in the field of electrical machines. In [3], authors summarized main features of the fault-tolerant machines as follows: (1) surface mounted structure, (2) large phase inductance, (3) concentrated winding, and (4) only one phase winding in each slot. In [4], electromagnetic performance of the permanent magnet brushless machine with pitch winding and full tooth winding were fully compared in this paper.…”

Adaptive Control of Four Motor Servo Systems Based on Characteristic Model and Gradient Projection Estimator

“…Four-motor servo system has advantages in power supply and fault tolerant, which improves its reliability. However, its complex system model, high coupling and nonlinear features all present a huge challenge to controller design, which requires high precision, strong robustness, fast convergence rate and easy realization at the same time [6], [7]. Therefore, designing an easily realized adaptive controller becomes the key point to make multi-motor synchronization systems efficient and reliable.…”

Influence of Winding Distribution on Fault Tolerant Performance in a Fault-Tolerant Permanent Magnet Rim Driven Motor

“…The demagnetization caused by the partial saturation effect of the motor will reduce the self-inductance of winding and a simplified calculation method of the saturation inductance was given in [14]. At present, in relevant literature, the analysis of self-induction of FTPMM is based on the certain structure, and the influence of different winding distribution on the magnetizing induction has not been studied [15].…”