High-reliability permanent-magnet synchronous motor based on redundancy and fault-tolerant technology

Abstract

The invention relates to a high-reliability permanent-magnet synchronous motor based on redundancy and fault-tolerant technology, which comprises a shell, two rotor assemblies, two stator assemblies, rotating shafts, bearings, insulating sleeves, a magnetic isolation plate and an end cover, wherein the two stator assemblies are coaxially connected in series; windings in each stator assembly are centralized single-layer windings which are isolated by teeth and embedded in fractional slots, and an electrical fault-tolerance structure is formed among the phase windings; due to the structural dimension design of the stator tooth slot, the induction of the phase winding of the motor is enhanced, thereby effectively inhibiting the short-circuit current; the two rotor assemblies are connected in series on the same shaft and are respectively arranged in the two stator assemblies; magnetic steel in each rotor assembly is of a thickness-unequal magnetic steel structure; the magnetic isolation plate is arranged between the adjacent two stator assemblies and is used for isolating electromagnetic interference between the stators and rotors at both ends; the two bearings are respectively arranged in bearing chambers of the shell and the end cover; and all the assemblies are packaged by the shell and the end cover together. The permanent-magnet synchronous motor provided by the invention has favorable physical isolation, magnetic isolation, thermal isolation and electrical isolation capabilities, and the reliability of the motor is greatly enhanced.

Description

(1) Technical field [0001] The invention belongs to the technical field of permanent magnet synchronous motors, in particular to a highly reliable permanent magnet synchronous motor based on redundancy and fault tolerance technology. (2) Background technology [0002] With the development of power electronics technology, permanent magnet materials and motor control technology, permanent magnet synchronous motors are widely used in aerospace, electric vehicles, medical equipment, Industrial automation and other fields. [0003] As the main trend of future aircraft development, multi-electric / all-electric aircraft put forward higher requirements for the airborne actuation system that directly affects its flight safety and maneuverability. Higher reliability and fault tolerance have become a new type of airborne The technical characteristics that the actuation system must have. As the core component of the airborne actuation system, the permanent magnet synchronous motor dire...

AI Technical Summary

Problems solved by technology

[0004] However, the traditional redundancy permanent magnet synchronous motor has serious electrical, magnetic and thermal coupling problems between the redundancy, which leads to mutual interference between the system redundancy and poor fault isolation capability; at the same time, when the permanent magnet synchronous motor has a short-circuit fault At this time, since the permanent magnet cannot be demagnetized in time, a large value of short-circuit current will generate a large braking torque, which will seriously affect the performance of the system and limit the further improvement of the reliability of the permanent magnet synchronous motor.

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