A new two-stage seven-phase permanent magnet fault-tolerant motor

Abstract

The invention provides a novel two-section type seven-phase permanent magnet fault-tolerant motor and belongs to the technical field of permanent-magnet synchronous motors. The motor comprises a motor shell, two rotor assemblies, two stator assemblies, a rotary shaft, a bearing, a bush, an insulating sleeve, a magnet isolating board and an end cover. The two stator assemblies and the two rotor assemblies are coaxially installed on the same shell. The two stator assemblies are a three-phase winding and a four-phase winding respectively and connected with the rotary shaft through the rotor assemblies respectively, so that a three-phase permanent magnet fault-tolerant motor section and a four-phase permanent magnet fault-tolerant motor section are formed. The magnet isolating board is installed between the two motor sections. Phase windings of the stator assemblies are in a concentrated single-layer winding mode and are embedded separately through teeth. Power is supplied to each phase winding through an independent H-bridge driving mode. The novel two-section type seven-phase permanent magnet fault-tolerant motor is good in physical isolation capacity, magnetic field isolation capacity, thermal field isolation capacity and electric isolation capacity and can effectively restrain short circuit currents of the permanent magnet motor, greatly improve the reliability of the permanent magnet motor and satisfy the requirements for primary fault work, secondary fault work and third fault safety.

Description

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 non-similar redundancy and fault tolerance technology. Background technique [0002] With the introduction of the Power-By-Wire (PBW) concept, and the development of high energy product permanent magnet materials and high-power drive devices, electric actuators directly driven by permanent magnet motors are characterized by their light weight and high efficiency. It is widely used in aerospace, electric vehicles, medical equipment, industrial automation and other high-reliability servo actuation fields due to its advantages of high performance, good maintainability, and low life-cycle cost. [0003] As the development direction of high reliability servo actuation system in the future, higher reliability and fault tolerance have become the technical characteristics that new electric actuators...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problems of the above-mentioned traditional redundant degree permanent magnet synchronous motors that cause mutual interference between system redundancy, poor fault isolation capability, and seriously affect the fault tolerance of the system, the present invention provides a new two-stage seven-phase permanent magnet synchronous motor. Magnetic Fault Tolerant Motor

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