Stator-module-type hybrid-excitation fault-tolerant motor

Abstract

The invention discloses a stator-module-type hybrid-excitation fault-tolerant motor, which comprises a first stator (1) and a second stator (3) which are arranged face to face, and a rotor (2) which is installed between the first stator (1) and the second stator (3); the first stator (1) comprises a plurality of first stator core modules, air gap bridges (7) exist among adjacent first stator core modules and the first stator core modules are arranged on a nonmagnetic first stator fixing disk (8); excitation windings (10) are put in spaces between adjacent air gap bridges (7) and the first stator fixing disk (8); each first stator core module comprises a plurality of stator cores (4), permanent magnets (5) are clamped between adjacent stator cores (4) and stator windings (6) are wound on the stator cores (4); the structure of the second stator (3) is the same as the structure of the first stator (1) and the first stator (1) and the second stator (3) are symmetrically arranged relative to the rotor (2). The motor combines the advantages of a flux switching motor and a fault-tolerant motor and the performance of the motor is improved.

Description

technical field [0001] The invention relates to a stator modular hybrid excitation fault-tolerant motor, which is an improvement on the traditional fault-tolerant motor and belongs to the technical field of permanent magnet motors. Background technique [0002] British Professor B.C.Mecrow proposed the concept of fault-tolerant permanent magnet motor, combining the structural mode of switched reluctance (SR) motor with permanent magnet synchronous motor, which belongs to the rotor permanent magnet motor. The traditional distributed winding of permanent magnet synchronous motor is changed to concentrated winding, and there is only one set of winding in each stator slot. The armature tooth without winding serves as a magnetic flux circuit, and also plays an isolation role, realizing the relative independence of the circuit, magnetic circuit and temperature between phases. However, the permanent magnet is installed on the rotor. When the motor heats up, the rotor is difficult ...

AI Technical Summary

Problems solved by technology

However, the permanent magnet is installed on the rotor. When the motor heats up, the rotor is difficult to cool, and it is prone to failures such as permanent magnet demagnetization; and when a phase winding fails, the motor will inevitably experience torque fluctuations, reducing the output torque. Fault tolerance needs to be improved

The flux-switching permanent magnet motor proposed by the French scholar E.Hoang puts the permanent magnet on the stator. In this way, the structure of the rotor is simple, and there is neither winding nor permanent magnet on the rotor, which solves the above problems and has gas It has the advantages of high gap flux density, sinusoidal back EMF, and high motor efficiency. However, it also has the disadvantages of large cogging torque and fault tolerance. On the other hand, the current hybrid excitation flux switching permanent magnet motor has a complex structure. Difficult to process

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