An oil-immersed permanent magnet motor

Abstract

The invention discloses an oil-immersed permanent magnet motor. The oil-immersed permanent magnet motor comprises a stator and a rotor; the stator comprises a base and a stator core; the rotor comprises a rotating shaft and silicon steel sheets; limiting keys are arranged in a rotating shaft limiting slot and silicon steel sheet limiting slots respectively; an even number of groups of V-shaped magnetic steel mounting holes are symmetrically formed in the silicon steel sheet; first silicon steel of which the outer side is an N pole and of which the inner side is an S pole and second silicon steel of which the outer side is an S poles and of which the inner side is an N pole are arranged alternately in the magnetic steel mounting holes; the superposition end of the rotating shaft is fixedlyprovided with an inner layer locking device and an outer layer locking device; the base is provided with an open type end cover with a first oil passage hole; and a second oil passage hole is formed in the base. The stator winding and rotor of the motor emit heat uniformly, and have good cooling effects; the rotor is provided with the built-in silicon steel sheets with the V-shaped magnetic steelmounting holes, the inner layer locking device and the outer layer locking device, and therefore, the eddy current loss of the rotor can be effectively reduced, it can be ensured that the multiple superimposed built-in silicon steel sheets are of an independent body, magnetic steel installation can be facilitated, and the high-speed rotation escape of the rotor under high-speed operation can be prevented.

Description

technical field [0001] The invention belongs to the technical field of motor-driven hydraulics, and in particular relates to an oil-immersed permanent magnet motor, which is especially suitable for a high-speed built-in rotor permanent magnet motor. Background technique [0002] Traditional hydraulic transmission mostly adopts the layout of hydraulic pump station + pipeline, which has the characteristics of complex pipeline, large space occupation, low redundancy, and poor replacement and maintenance. In the future, the development trend of all-electric drive for ships requires that the hydraulic actuators distributed in various parts of the ship will use more independent oil source + cable layout. [0003] At present, the connection method with many independent oil sources uses the drive motor to connect the hydraulic pump, and the motor and the hydraulic oil tank are isolated. Although the design and requirements of the motor are simplified, it leads to large size and heav...

AI Technical Summary

Problems solved by technology

[0005] At the same time, no matter from the literature or patent application, although there are many ways to fix the built-in magnets, there are few oil-immersed high-speed rotor permanent magnet motors with tight dimensions. Whether it is high-strength carbon fiber or the fixing method of the outer sheath, there are certain problems of one kind or another.

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